US3604229A

US3604229A - Dead bolt and latch door lock

Info

Publication number: US3604229A
Authority: US
Inventors: Kiyoyasu Wake
Original assignee: TUJISASH IND Ltd; KIYOYASU WAKE
Current assignee: TUJISASH IND Ltd; KIYOYASU WAKE
Priority date: 1969-01-29
Filing date: 1969-01-29
Publication date: 1971-09-14
Anticipated expiration: 1988-09-14

Abstract

Disclosed is a combination door lock case which includes a latch member and a dead bolt both of which can be selectively projected into a striker plate mounted on a doorjamb. Latch bars extending from doorknobs positioned on each side of the case independently engage individual actuator members within the case, and rotate them about a main axis. Through cam and lever connections, the rotating actuators move the latch member from a temporary latching position, with the latch member projected into the striker plate, to a temporary unlatching position, with the latch member withdrawn into the door. Also in the case is a crank arm which is engageable by a spindle member causing the crank arm to rotate about the main axis as the spindle member is rotated. The end of the crank arm actuates the dead bolt to move it from an extended locking position to a retracted unlocking position with the dead bolt bodily contained within the door. The spindle is attached at one end to a thumb turn member positioned within one of the doorknobs and through a lost motion connector at the other end, the spindle can be actuated by a key cylinder positioned in the other doorknob. Provisions are made for preventing the actuation of the spindle by a picking tool inserted through the keyway of the lock cylinder.

Description

United States Patent [72] Inventor Kiyoyasu Wake Tokyo,Japan 211 AppLNo. 794,875

[22] Filed Jan. 29, 1969 [45] Patented Sept. 14, 1971 Tujisash Industries, Ltd.

Kanagawa, Japan a part interest [73] Assignee [S4] DEAD BOLT AND LATCH DOOR LOCK 27 Claims, 14 Drawing Figs.

52 use 70/107, 70/146,70/223,70/419,292/161,}92/3365 151 1111.01 E051 35/04, E05b 59/02, E05b 3/08, E05c 1/12 50 FieldofSearch 70/107,

Primary ExaminerMarvin A. Champion Assistant Examiner -Edward J. McCarthy Attorney-Christensen & Sanborn ABSTRACT: Disclosed is a combination door lock case which includes a latch member and a dead bolt both of which can be selectively projected into a striker plate mounted on a doorjamb. Latch bars extending from doorknobs positioned on each side of the case independently engage individual actuator members within the case, and rotate them about a main axis. Through cam and lever connections, the rotating actuators move the latch member from a temporary latching position, with the latch member projected into the striker plate, to a temporary unlatching position, with the latch member withdrawn into the door. Also in the case is a crank arm which is engageable by a spindle member causing the crank arm to rotate about the main axis as the spindle member is rotated. The end of the crank arm actuates the dead bolt to move it from an extended locking position to a retracted unlocking position with the dead bolt bodily contained within the door. The spindle is attached at one end to a thumb turn member positioned within one of the doorknobs and through a lost motion connector at the other end, the spindle can be actuated by a key cylinder positioned in the other doorknob. Provisions are made for preventing the actuation of the spindle by a picking tool inserted through the keyway of the lock cylinder.

PATENIED SEP] 4 m1 SHEET 2 BF 3 PATENTED SEP] 4 |97l SHEET 3 [IF 3 DEAD BOLT AND LATCH DOOR LOCK BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to door locks and more particularly to improvements to door locks permitting the location of both latch and dead bolt controlling elements in the doorknobs.

2. Description of the Prior Art Several characteristics of door lock hardware are considered by the prospective hardware customer and some of these include appearance, convenience, security, reliability, and cost. In recent years, at least in the United States, it has been common practice for those in the building trades to use door lock hardware which presents a clean, uncluttered appearance, is convenient in operation, and relatively inexpensive.

A typical example of this type of door lock hardware is referred to as the key in knob pushbutton lock. This particular lock, as used for outer doors, includes a key lock cylinder positioned centrally of the outside knob with no other hardware element positioned on the exterior of the door. A button or thumb turn member is generally located in the center of the inside knob but some styles have the button positioned in the rose member forming the baseplate of the knob. This lock has only one locking element in the form of a latch member which is projectable from the edge of the door into the opening of a striker plate located on the doorjamb. The latch member, when the lock is in its unlocked condition, can be cycled by turning either the inside'or outside doorknob. To lock the door, the button or thumb turn on the inside knob is operated to prevent the rotation of the exterior knob thereby preventing the cycling of the latch member by anyone on the outside of the door.

The latch member itself is spring biased to the projected latching position but can be easily blocked by means of a thin member, such as a plastic or metal sheet inserted between the edge of the door and the striker plate causing the latch member to become retracted into the door edge. Thus it is seen that this type of lock is not very secure since there is no provision of a dead bolt for positive locking, yet this type of lock is commercially very popular because of its convenience in operation.

If the user is leaving the house, he merely pushes the button or turns the thumb turn, closes the door behind him and it is locked. It is not necessary for him to get out hiskey and project the latch member by inserting his key into the locking cylinder and rotating the locking mechanism. When he desires to unlock the door, if he is inside the house, he merely turns the inside knob to release the pushbutton or to turn the thumb turn thereby retracting the latch member. If he is on the outside of the house, he inserts his key into the cylinder, turns the cylinder which releases the pushbutton or rotates the thumb turn permitting the rotation of the outside knob for retracting the latch member. Another disadvantage beyond the lack of good security of the key in knob pushbutton lock is the fact that oftentimes the user is locked out of the house by failing to bring the key with him.

OBJECTS AND SUMMARY OF THE INVENTION It is the principal object of the instant invention to provide a generally improved door lock apparatus which provides the locking security of a dead bolt lock with most of the conveniences of the key in knob pushbutton lock and all of the goodappearance features of such locks.

Another object of the instant invention is to provide a generally improved latch operating mechanism for door locks which permits the cycling of the latch member by the rotation of either of the doorknobs independently of one another, such that the doorknob operating the latch can be rotated without rotating the doorknob on the other side of the door.

It is a further object of the instant invention to provide a generally improved combination latch and dead bolt lock wherein the actuating members projecting-inwardly from the doorknobs rotate about a single axis while operating either the dead bolt or latch actuation mechanisms.

It is an additional object of the instant invention to provide a dead bolt actuation system which includes elements for prevention of the operation of the dead bolt by means of an unauthorized picking tool; first, by the use of means which prevent the rotation of such a tool and, second, by means which cause the disengagement of operating components when an unauthorized probing tool is used.

A related object of the instant invention is to provide a generally improved combination latch and dead bolt door lock having all of the exterior operating components thereof located in the knobs for presenting a clean, pleasing appearance.

In accordance with the present invention, a lock case is installed within the edge of the door and includes within it a retractable latch member, latch-operating mechanism, retractable dead bolt and a mechanism for retracting and projecting the dead bolt. Doorknobs may be located on either or both sides of the door and include control elements projecting into the case for actuating the latch member and dead bolt operating mechanisms.

The latch member is spring biased to a projected position such that it normally projects out from the edge of the door but may be easily retracted into the case as the beveled edge of the latch member strikes the edge of the striking plate when the door is pushed closed. Once the door is in its closed position, the biasing spring on the latch projects the latch member into an opening formed in the striking plate.

In addition, the latch member may be withdrawn into the door edge by means of a bellcrank lever and cam actuator mechanism positioned within the lock case. The bellcrank lever is attached at one end to an inner end of the latch member and the other end to the apex portion of a V-shaped connector member which has the ends of its legs engaged by cam surfaces formed in latch actuator cam plates which are supported for independent rotation about the main axis of the lock case. As either of the actuator plates is rotated about the main axis in either direction, the V-shaped connector is cammed to move away from the axis resulting in the pivoting of the bellcrank lever and the retraction of the latch member. Actuation slots are formed in the latch actuator cam plates for insertion therein of latch bars extending from the doorknobs into the lock case. As either doorknob is rotated its latch bars rotate through their engagement with the ends of the actuation slots, thereby cycling the V-shaped connector, bellcrank lever and latch member components. To provide independent operation between the doorknobs, the latch bars from one doorknob do not extend to join with the latch bars from the other doorknob and two individual latch actuator cam plates are spaced along the main axis so that the rotation of either of them independently causes the movement of the V-shaped connector member.

Positioned within the space between the two latch actuator cam plates is a bolt crank member which is supported for rotation by means of a spindle extending along the main axis of the case. The outer end of the crank engages a portion of the dead bolt to thereby project the bolt outwardly from the case or retract the bolt inwardly into the door edge, depending upon the direction of rotation of the spindle. A thumb turn member is positioned in one of the doorknobs and includes a means for engaging the spindle so that as the thumb turn member is rotated, so, too, are the spindle and bolt crank.

At the other end of the spindle, a lost motion connector permits the end of the key, projected into the keyway of a cylinder lock located in the other knob, to rotate the spindle when the key has been rotated more than The connector between the end of the key and the end of the spindle is spring biased so that it can become disengaged if a probing tool urges the connector toward the locking case. An additional projection is provided at the end of the locking cylinder to prevent the rotation of a picking tool having the form of the inner end of the key. When the proper key has unlocked the cylinder permitting its rotation relative to the outer cylinder, the projection rotates with the key.

These and other features and advantages of the invention will become more clearly apparent from the following detailed description thereof which is to be read with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevation view of a door edge with some parts broken away and others in section to illustrate the components of the improved combination latch and dead bolt door lock made in accordance with the present invention;

FIG. 2 is a side elevation view of the lock case illustrating the position of the improved latch and dead bolt operating mechanisms made in accordance with the present invention;

FIG. 3 is a side elevation view of a portion of the lock case with some parts removed for clarity to illustrate the dead bolt operating mechanism with the dead bolt retracted bodily within the door edge;

FIG. 4 is a view similar to FIG. 3 but illustrating the projected position of the dead bolt;

FIG. 5 is a side elevation view of the locking case, with some parts removed for clarity, illustrating the normal condition of the latch mechanism with the latch member it its projected position;

FIG. 6 is a view similar to FIG. 5 showing the position of the latch-operating mechanism when the knob has been turned in the direction of the arrow A to withdraw the latch member into the door edge;

FIG. 7 is a view similar to FIG. 6 showing the location of the latch bar mechanism when the knob has been rotated in the direction 8;,

FIG. 8 is an exploded isometric view of the key lock end of the dead bolt actuation components made in accordance with the present invention;

FIG. 9 is a side section view on an enlarged scale of the connector element shown in FIG. 8 illustrating the position of the tip of the key with relation to other components of the connector made in accordance with the present invention;

FIG. 10 is a view similar to FIG. 9 but illustrating the disengagement of connector components resulting from the use of a picking tool; and

FIGS. 11 to 14 are section views of the key engagement portion of the connector, as seen from lines 11l1 of FIG. 9, il- Iustrating the sequence of positions for these components.

DESCRIPTION OF THE PREFERRED EMBODIMENTS With general reference to FIGS. 1 and 2, the edge of door 39 is shown fitted with a generally improved combination latch and dead bolt lock 60 made in accordance with the present invention. As shown, lock 60 includes a locking case 9 positioned within door 39 and operated by an outside doorknob l, referred to as a key knob, and inside doorknob 2. For ease of manufacturing, installing and repair part storing, many of the components housed within lock case 9 can be used with a variety of inside and outside fittings.

The example shown indicates the typical outside door with key knob l positioned on the outside and a keyless knob 2, having a bolt-actuating thumb turn 6, fitted on the inside of the door 39. Other possibilities include the use of a blank member on one side of the door with a key knob, thumb turn keyless knob, or a plain keyless knob fitted on the other side. In addition, a key knob could be places on one side of the door and a plain keyless knob fitted on the other side. If desired, a key knob could be installed on both sides of the door, or a key knob could be placed on one side and a plain keyless knob placed on the other side. The desired combination is usually dependent upon the use to which the door is to be put.

Before going into specific details of the operating.

mechanism of the lock 60, its general arrangement becomes apparent from an inspection of FIGS. 1 and 2. Key knob l is positioned on the outside of the door 39 and inside knob 2 is positioned on the inside of door 39. Escutcheon plates 3 and 4, commonly referred to as rose members, span the distance between the inner portions of the knobs 1 and 2 and the outer faces of door 39. Edge plate 8 serves to locate and support lock case housing 9 in the edge of door 39. Projecting out from the lock case housing 9, through apertures formed in its edge and in edge plate 8, are dead bolt 10 and latch member 11. When door 39 is closed, edge plate 8 is positioned opposite to strike plate 40 positioned in the edge of doorjamb 41. Strike plate 40 provides openings 42 for insertion therethrough of dead bolt 10 and latch member 11 tothereby couple door 39 to doorjamb 41.

The Dead Bolt Mechanism With specific reference to FIGS. 3 and 4, it is noted that dead bolt 10 is movable through the aperture formed in edge plate8 from a retracted position as shown in FIG. 3 to an extended locking position as shown in FIG. 4. To accomplish this movement, bolt spindle 25, which extends with its axis coincident with the main axis 37 of the lock 60, is rotated about main axis 37. Bolt crank 15 is supported by and rotates with bolt spindle 25 from a retracted position as shown in FIG. 3 to an extended position as shown in FIG. 4. Bolt crank end lug 31, positioned on the outer end of bolt crank 15, is engaged by bolt spring 35 as it is supported by spring retainer 34 which extends outwardly from bolt body 32. The bolt notch 33 into which end lug 31 is inserted is formed in the innermost end of bolt body 32. Thus, the rotational movement of bolt spindle 25 causes a swinging movement of bolt crank 15 resulting in a linear movement of dead bolt 10 to an extended position from a retracted position and from an extended position to a retracted position. The details of the mechanism for rotating bolt spindle 25 will be discussed later with reference to FIGS. 8 to 14. Latch-Operating Mechanism With reference to FIGS. 5 through 7, it is noted that latch member 11 is cycled from a latching position extending through an aperture in edge plate 8, as shown in FIG. 5, to a retracted position bodily contained within the edge of door 39, as shown in FIGS. 6 and 7. As shown in FIG. I, latch bars 14 extend into lock case housing 9 from key knob 1 and inside knob 2. Specifically, latch bars and 14b extend inwardly from key knob 1 into recesses formed in latch cam plate which is rotatably supported by shaft 9a for pivotal movement about main axis 37. In a similar manner, top latch bar 140 and bottom latch bar 14d extend inwardly from inside knob 2 into recesses formed inlatch cam plate 16b which is similarly pivotally mounted upon housing shaft 9a for movement about main axis 37. With this arrangement the rotation of key knob 1 causes the rotation of latch cam plate 161: because of the transfer of torque from knob 1 through top latch bar 14a and bottom latch bar 14b to latch cam plate 161:. Similarly, the rotation of inside knob 2 about main axis 37 causes the rotation of latch cam plate 1612 due to the torque transferred through top latch bar 140 and bottom latch bar 14d. It should be noted that the latch bars 14 do not extend completely through lock case housing 9 thereby providing independent rotation of latch cam plates 16a and 16b through the independent rotation of knobs 1 and 2.

Cam surfaces formed in each end of projections of latch cam plates 16a and 16b are engaged by the leg ends 17 of V- shaped latch connector plate 18. At the apex of connector plate 18, an apex joint 19 is formed with one end of latch bellcrank lever 20 which pivots about lever pivot 21. The other end of latch bellcrank lever 20 forms a lever tip 22 which engages the ends of an aperture formed in latch housing 12 to retract latch member 11 inwardly, into lock case housing 9 as lever 20 is rotated in a clockwise direction, as seen in FIGS. 5 through 7, about pivot 21. Lever spring 23, acting between the housing 9 and bellcrank 20, biases bellcrank lever 20 in a counterclockwise position such that when no rotational force is applied to bellcrank lever 20 through latch connector plate l8, latch member 11 is urged into a projecting position. Latch member 11 is manually pushed into its retracted position as it strikes the edge of strike plate 40 acting against the biasing force of latch spring 13 which will restore latch member 11 to its extended position when the manual force or contact with strike plate 40 has been discontinued. It should be noted that the manual holding of key knob 1 to prevent its rotation will not affect the operation of latch member 11 since latch bars 14a and 14b are not connected to latch

bars

140 and 14d of knob 2 and since the latch mechanism is independently movable by the provision of two independent latch cam plates 16a and 161;. Further, it should also be noted that when one of the knobs, 1 or 2, is rotated there is no interconnection with the other knob which will cause its rotation.

Pick-Proof Bolt Spindle Mechanism As shown in FIG. I, the connection between thumb turn 6, mounted centrally, of inside knob 2, with bolt spindle 25 is rather straightforward as it is provided by meansof a connection through thumb turn shaft 30 extending from the inner end of thumb turn 6 to overlap with one end of bolt spindle 25. The connection between shaft 30 and bolt spindle 25 is of the type which permits axial relative movement between shaft 30 and bolt spindle 25 along main axis 37 but fixed relative move ment between thumb turn 6 and bolt spindle 25 around main axis 37. Thus as the user rotates thumb turn 6 he also directly rotates bolt spindle 25 and bolt crank resulting in the actuation of dead bolt 10.

Since the unauthorized operation of the other end of bolt spindle is of principal concern, attention isdirected to a more detailed showing of this structure in FIGS. 8 to 14. In the normal manner key 5 is inserted into the keyway 43 formed within cylinder barrel 44 which is housed by and relatively locked in position with outer lock cylinder 7. When the proper key 5 is inserted into keyway 43, the unlocking relationship with alignment of lock pins 27 is established permitting rotation of cylinder barrel 44 about main axis 37 relative to outer cylinder 7. Since outer cylinder 7 is firmly attached to key knob l, the unlocking relationship between barrel 44 and cylinder 7 permits rotation of barrel 44 relative to key knob I. Extending inwardly fromcylinder barrel 44 on either side of a continuation of keyway 43 are positioned rotation barrier elements 46 to prevent the rotation of a picking tool which might be elongated and narrow along the length of keyway 43 but have a tip formed similar to the end tip of key 5. Unless the proper unlocking relationship of lock pins 27 is established, no rotation of cylinder barrel 44 or rotational barrier elements 46 relative to lock outer cylinder 7 is permitted.

As best shown in FIG. 9, the tip end of key 5 is inserted into a lost motion sleeve 26 which has an axis coincident with main axis and is rotatable about main axis 37. Sleeve key opening 28 is formed at one end of sleeve 26 and provides sleeve abutment members 48 which come into contact with the edges of key 5 when there is a relative rotation of more than 90 about axis 37 between sleeve 26 and key 5. AT the inner end sleeve 26 there are formed sleeve lugs 49 which extend toward axis 37 and upon rotation of bolt spindle 25 or sleeve 26 engage fingers 52 which extend parallel to axis 37 from the periphery I of bolt spindle end flange 51. Spindle end flange 51 is secured to bolt spindle 25 such that as bolt spindle 25 rotates, so too does flange 51. Bolt spindle 25'extends inwardly from spindle end flange 51 toward bolt crank I5. Intermediate of flange 51 and bolt crank 15, bolt spindle 25 passes through an aperture formed in spindle support plate 54 which is secured, as shown in FIG. 1, to outside rose member 3. The connection between spindle support plate 54 and bolt spindle 25 is such that rotational movement of spindle 25 about main axis 37 is not inhibited by support plate 54, but axial movement of spindle 25 along axis 37 is prevented by the connection between spindle 25 and spindle support plate 54.

To prevent a picking tool projected through keyway 43 from causing rotation of spindle 25, a picking shield 45 is positioned within lost motion sleeve 26 and sleeve spring 28 is biased between picking shield 45 and end flange 5 I of spindle 25. As shownin FIG. 10, when the tip of a picking tool 55 causes an axial force parallel to main axis 37, as it engages sleeve 26 or picking shield 45, the biasing force of sleeve spring 29 is easily overcome causing the disengagement between sleeve lugs 49 and fingers 52 of spindle end flange 51. This disengagement permits rotation of sleeve 26 relative to bolt spindle 25 thereby isolating sleeve'26 from any bolt action. This disconnection frustrates the purpose of the picking tool 55. In summary, a picking tool, which is formed to conform to with the tip of key 5 yet having a narrow body which is not prevented from rotation by the structural constriction of keyway 43, is prevented from rotation by rotation barrier elements 46. The disconnection of sleeve 26 from bolt spindle 25 by means of the structural relationship between lugs 49 of lost motion sleeve 26 and fingers 52 of spindle end flange 51 prevents unauthorized rotation of spindle 25 by a picking tool applying an axial and then rotational force against sleeve 26.

FIGS. ll'to 14 illustrate the sequence of rotation of bolt spindle 25. As shown in FIGS. 11 and 13, when thumb turn 6 is rotated 90 about axis 37 a similar movement is produced for bolt spindle 25, bolt crank 15 and sleeve 26, thereby moving dead bolt 10 from its retracted position shown in FIG. 3 to its extended locking position shown in FIGS. 2 and 4. Upon the reverse rotation of thumb turn 5 of 90 about axis 37, a similar movement, produced for bolt spindle 25, bolt crank 15 and sleeve 26, results in the movement of dead bolt 10 from its locking position to its retracted position bodily within door 39. Without key being positioned in keyway 43 the rotation of thumb turn 6 is independent of cylinder barrel 44 since there is direct connection between barrel 44 and sleeve 26.

Upon the positioning of the proper key 5 within keyway 43, contact between key 5 and lock pins 27 establishes an unlocking relationship between cylinder barrel 44 and lock cylinder 24 permitting rotation of cylinder barrel 44 about main axis 37 relative to outer cylinder 7. Key 5 may be inserted into keyway 43 or removed from keyway only when the planes of key 5 and keyway 43 are aligned with key insertion and removal plane 57.

As key 5 is rotated through the first 90 from the position shown in FIG. 11 to that shown in FIG. 12 nothing happens to bolt spindle 25 because there is no engagement between any of the surfaces A to D of sleeve abutment members 48 and any of the tip surfaces E to H of key 5. Continued rotation of key 5, however, from the 90 position shown in FIG. 12 to the I position shown in FIG. 12, causes sleeve 26, spindle end flange 51, bolt spindle 25, bolt crank 15 and thumb turn 6 to rotate as surfaces D and B of sleeve abutment members 48 are engaged and rotated by trip surfaces E and G, respectively, of key 5. This rotation causes dead bolt 10 to be projected to the locking position shown in FIGS. 2 and 4. Key 5 can be removed from barrel 44 because of the parallel alignment between key 5 and keyway 43 with key insertion and removal plane 57, as shown in FIG. 13.

Regardless of how sleeve 26 was moved to the locking position shown in FIG. 13, either by manual rotation of thumb turn 6 or by rotation of key 5, it is restored to the unlocked position of FIG. 11 by rotation in the reverse direction. To accomplish this rotation thumb turn 6 may be merely rotated 90 in the direction of the arrow shown in FIG. 14 or key 5 is again inserted into keyway 43 and rotated in the direction of the arrow shown in FIG. 14. The first 90 of rotation of key 5 changes its position from that shown in FIG. 13 to that shown in FIG. 14 without rotation of sleeve 26 due tothe lost motion spacing between surfaces 8 and C and D and A of abutment members 48. Continued rotation of key 5 from its position shown in FIG. 14 to that shown in FIG. 11 causes a 90 rotation of sleeve 26, end flange 5], bolt spindle 25, bolt crank 15 and thumb turn 6 due to the engagement between key tip surfaces F and H with sleeve abutment surfaces A and C, respectively, until dead bolt 10 is retracted into door 39 in the un- What is claimed is:

1. in a lock apparatus, the improvement comprising:

spindle means extending along a main axis and rotatably supported for rotation about said axis;

said spindle means including finger means for receiving torque forces applied to said spindle;

connector means including a sleeve member positioned adjacent said finger means and having lug members selectively engageable with said finger means for applying-a torque to said spindle as said sleeve member is rotated about said axis;

said connector means also including biasing means normally biasing said connector means into engagement position with said lug means disposed for engagement with said finger means as said sleeve member is rotated about said axis with said biasing means being easily overcome by a force applied against said sleeve member in an axial direction tending to move said sleeve along said spindle to a disengagement position with said finger and lug means relatively disposed such that rotation of said sleeve is independent of said spindle,

and

said sleeve member also including abutment means having abutment surfaces, extending radially inwardly from the end of said sleeve member opposite to the end supporting said lug means, for receiving torque forces applied to said sleeve member.

2. The lock apparatus of claim 1, including:

locking barrel and cylinder means disposed with the keyway of said barrel and the axis of said cylinder coincident with said main axis; and

proper key means, upon insertion into said keyway, permitting rotation of said key, keyway and barrel relative to said cylinder about said main axis with the tip end of said key means having surfaces disposed for engagement with said sleeve abutment surfaces for applying a torque to said sleeve member and spindle as said key means is rotated about said axis. r

' 3. The lock apparatus of claim 2, wherein:

said locking barrel includes rotation barrier means projecting into said sleeve member as a continuation of said keyway beyond said cylinder for preventing rotation of a picking tool inserted through said keyway to a position adjacent said abutment surfaces of said sleeve member.

4. In a lock apparatus, the improvement comprising:

a lock case including an edge plate, adapted to be positioned in theside edge of a door for housing locking elements selectively projected through apertures provided in said edge plate;

latch mechanism supported within said lock case and including a latching member, projectable through said edge plate aperture, a latch housing for supporting said latch member, a latch bell crank lever for selectively projecting and retracting said latch member, a V-shaped latch connector plate for rotating said lever, and latch cam plate means for actuating said connector plate;

said latch member supported by said latch housing and movable between an extended position whereat a portion thereof projects out from said door edge through said edge plate aperture and a retracted position whereat said latch member is contained bodily within said door edge;

said lever is pivotally mounted within said case and operatively connected to said latch housing at one end and to the apex of said connector plate at its other end for moving said latch member to said extended position when said lever is in a first position and to said retracted position when said connector and lever are in a second position;

said latch cam plate means pivotally mounted within said case for rotating about a main axis and including latchbar-engaging surfaces for receiving torque in either direction about said main axis;

said latch cam plate means also including cam surfaces selectively engageable with leg ends of said connector plate for converting torque applied to said cam plate to movement of said connector plate and lever to said second position.

5. The lock apparatus of claim 4, wherein said latchmechanism also includes a biasing means for biasing said lever and connector to said first position.

6. The lock apparatus of claim 4, wherein:

said latch cam means includes two plate members of substantially identical configuration spaced from one another along said main axis for independent rotation thereabout with said connector legs selectively engaged by either of said cam plate members; 7 v

said latch-bar-engaging surfaces of said cam plate members being engageable by bar means inserted into opposite sides of said lock case for applying torque ,to one or the other of cam plate members.

7. The lock apparatus of claim 4, including:

a dead bolt mechanism also supported within said lock case including a'bolt spindle extending through said case and along said main axis for transferring torque to said dead bolt mechanism, a dead bolt slidably mounted within said case and movable through one of said edge plate apertures between an extended position whereat a portion thereof projects out from said door edge and a retracted position whereat said dead bolt is contained bodily within said door edge, and a bolt crank means supported by said spindle with one end thereof engaging said dead bolt for moving said dead bolt toward said extended position when torque is applied to said bolt spindle in a first direction and for moving said dead bolt toward said retracted position when torque is applied to said bolt spindle in a second direction opposite to said first direction.

8. The lock apparatus of claim 6, including:

a dead bolt mechanism also supported within said lock case including a bolt spindle extending through said case and along said main axis for transferring torque to said dead bolt mechanism, a dead bolt slidably mounted within said case and movable through one of said edge plate apertures between an extended position, whereat a portion thereof projects out from said door edge and a retracted position whereat said dead bolt is contained bodily within said door edge, and a bolt crank means supported by said spindle between said cam plate members with one end thereof engaging said dead bolt for moving it toward said extended position when torque is applied to said bolt spindle in a first direction and for moving said dead bolt toward said retracted position when torque is applied to said bolt spindle in a second direction opposite to said first direction.

9. in a combination latch and dead bolt lock mechanism, a pair of mutually opposing, coaxially disposed knob spindles, one of which has a key-operated cylinder lock which is relatively fixedly located therein, on the rotational axis of the spindles, a manually operated bolt spindle mechanism which is independently rotatably mounted on the rotational axis of the spindles, means operatively interconnecting the individual knob spindles with the latch for reciprocation of the latch, and means operatively interconnecting the bolt spindle mechanism with the dead bolt for reciprocation of the dead bolt, the cylinder lock and the bolt spindle mechanism having mutually opposing end openings therein for projection of the leading end portion of the key of the cylinder lock into the bolt spindle mechanism from the cylinder lock, and there being lug means in the opening of the bolt spindle mechanism which are interengageable with the key when the cylinder lock is unlocked by the key, so that rotation of the key in the cylinder lock imparts torque to the bolt spindle mechanism to operate the dead bolt.

10. The combination latch and dead bolt lock mechanism according to claim 9 wherein the other knob spindle has an exteriorly accessible thumb turn which is independently rotatably mounted therein, on the rotational axis of the spindles, and interconnected with the bolt spindle mechanism to manually operate the same.

11. The combination latch and dead bolt lock mechanism according to claim 9 wherein the bolt spindle mechanism includes a sleeve adjacent the cylinder lock, which has lugs thereon that project radially inwardly of the bore of the sleeve to engage abutments on the key of the cylinder lock.

12. The combination latch and dead bolt lock mechanism according to claim 11 wherein the bolt spindle mechanism also includes a bolt spindle which is longitudinally coaxially disposed with the sleeve, the bolt spindle and sleeve being relatively axially shiftable and yieldably biased to assume a normally operative position along the rotational axis of the knob spindles, and there being lug means on the bolt spindle and sleeve which interengage with one another in the normally operative position thereof, so that the bolt spindle undergoes rotation in conjunction with the sleeve when torque is applied to the sleeve, but which disengage from one another when the bolt spindle and sleeve are shifted in relation to one another against the bias thereon, relatively axially away from the normally operative position thereof, so that the torque applied to the sleeve is not transmitted to the bolt spindle.

13. The combination latch and dead bolt lock mechanism according to claim 12 wherein the sleeve has a pick shield across the bore thereof, opposite the adjacent end of the bolt spindle.

14. The combination latch and dead bolt lock mechanism according to claim 9 wherein there is a pair of barrier elements relatively rotatably inserted into the opening of the bolt spindle mechanism, from the cylinder lock, to either side of the keyway of the cylinder lock, to prevent rotation of the bolt spindle mechanism by other than the key.

15. The combination latch and dead bolt lock mechanism according to claim 9 wherein the latch and dead bolt are housed in, and separately projectable from separate recesses spaced apart in the lock mechanism.

16. The combination latch and dead bolt lock mechanism according to claim 9 wherein the latch is spring loaded to project from the lock mechanism, and the means for reciprocating the latch include a pivotally mounted lever which is operative to retract the latch against the bias thereon, and a V- shaped latch connector, the apex of which is interconnected with the lever, and the legs of which are interconnected with the knob spindles and individually responsive to longitudinally applied end forces thereon to rotate the lever about the pivot thereof.

17. The combination latch and dead bolt lock mechanism according to claim 16 wherein the knob spindles are rotatable independently from one another, and each knob spindle is separately interconnected with the V-shaped latch connector to apply longitudinal end forces to the same independently of the other knob spindle.

18. In a knob spindle for a combination latch and dead bolt lock mechanism, a pair of coaxially disposed and relatively axially shiftable operating members for the dead bolt, which are independently rotatably mounted on the rotational axis of the knob spindle and yieldably biased to assume a normally operative position along the axis thereof, there being lug means on the operating members which are interengaged with one another in the normally operative position thereof to cause the members to undergo conjoint rotation when torque is applied to one of the members, but disengaged from one another when the members are shifted in relation to one another against the bias thereon, relatively axially away from the normally operative position thereof, so that the torque applied to the one operating member is not transmitted to the other operating member.

19. The knob spindle according to claim 18 wherein the one operating member has a recess therein and a portion of the other operating member is inserted in the recess, the lug means being interposed between the operating members in the recess.

20. The knob spindle according to claim 19 wherein the one operating member has lugs thereon which project radially inwardly of the recess and engage abutments on the other operating member 21. The knob spindle according to claim 20 wherein the one operating member takes the form of a sleeve, and the other operating member takes the form of a bolt spindle, one end portion of which is inserted in the bore of the sleeve.

22. The knob spindle according to claim 21 wherein the sleeve has a pick shield across the bore thereof, opposite the one end of the bolt spindle.

23. The knob spindle according to claim 22 wherein the one end of the bolt spindle has a flange thereon which in turn has axially extending fingers thereon which form abutments for the lugs on the sleeve.

24. The knob spindle according to claim 23 wherein biasing means are interposed between the pick shield and the flange on the bolt spindle.

25. The knob spindle according to claim 18 wherein there is a key-operated cylinder lock interposed in the spindle between the one operating member and the free end of the knob, the cylinder lock and one operating member having mutually opposing end openings therein for projection of the leading end portion of the key of the cylinder lock into the one operating member from the cylinder lock, and there being lug means in the opening of the one operating member which are interengageable with the key when the cylinder lock is unlocked by the key, so that rotation of the key in the cylinder lock imparts torque to the one operating member, and thus to the other operating member, for operation of the dead bolt.

26. The knob spindle according to claim 25 wherein there is a pair of barrier elements rotatably inserted into the opening of the one operating member, from the cylinder lock, to either side of the keyway of the cylinder lock, to prevent rotation of the one operating member by other than the key.

27. In combination, a lock mechanism having separately projectable latch and dead bolt locks therein, and a knob spindle interconnected with the lock mechanism to operate the locks, including a pair of coaxially disposed and relatively axially shiftable operating members for the dead bolt, which are independently rotatably mounted on the rotational axis of the knob spindle and yieldably biased to assume a normally operative position along the axis thereof, there being lug means on the operating members which are interengaged with one another in the normally operative position thereof to cause the members to undergo conjoint rotation when torque is applied to one of the members, but disengaged from one another when the members are shifted in relation to one another against the bias thereon, relatively axially away from the normally operative position thereof, so that the torque applied to the one operating member is not transmitted to the other operating member.

IPO1O5O UNITED STATES PATENT OFFICE (569) CERTIFICATE OF CORRECTION Patent No. 604 229 Dated pt 14, 1971 Inventofls KIYOYASU WAKE It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Please correct Assignee's name as follows:

From: "Tujisash Industries, Ltd.

T -Fujisash Industries, Ltdn Signed and sealed this 26th day of March 1972.

(SEAL) Attest:

EDWARD MJLETQHER, JR. ROBERT GOTTSCHALK Attestlng Officer Commissionerof Patents

Claims

1. In a lock apparatus, the improvement comprising: spindle means extending along a main axis and rotatably supported for rotation about said axis; said spindle means including finger means for receiving torque forces applied to said spindle; connector means including a sleeve member positioned adjacent said finger means and having lug members selectively engageable with said finger means for applying a torque to said spindle as said sleeve member is rotated about said axis; said connector means also including biasing means normally biasing said connector means into engagement position with said lug means disposed for engagement with said finger means as said sleeve member is rotated about said axis with said biasing means being easily Overcome by a force applied against said sleeve member in an axial direction tending to move said sleeve along said spindle to a disengagement position with said finger and lug means relatively disposed such that rotation of said sleeve is independent of said spindle, and said sleeve member also including abutment means having abutment surfaces, extending radially inwardly from the end of said sleeve member opposite to the end supporting said lug means, for receiving torque forces applied to said sleeve member.

2. The lock apparatus of claim 1, including: locking barrel and cylinder means disposed with the keyway of said barrel and the axis of said cylinder coincident with said main axis; and proper key means, upon insertion into said keyway, permitting rotation of said key, keyway and barrel relative to said cylinder about said main axis with the tip end of said key means having surfaces disposed for engagement with said sleeve abutment surfaces for applying a torque to said sleeve member and spindle as said key means is rotated about said axis.

3. The lock apparatus of claim 2, wherein: said locking barrel includes rotation barrier means projecting into said sleeve member as a continuation of said keyway beyond said cylinder for preventing rotation of a picking tool inserted through said keyway to a position adjacent said abutment surfaces of said sleeve member.

4. In a lock apparatus, the improvement comprising: a lock case including an edge plate, adapted to be positioned in the side edge of a door for housing locking elements selectively projected through apertures provided in said edge plate; latch mechanism supported within said lock case and including a latching member, projectable through said edge plate aperture, a latch housing for supporting said latch member, a latch bell crank lever for selectively projecting and retracting said latch member, a V-shaped latch connector plate for rotating said lever, and latch cam plate means for actuating said connector plate; said latch member supported by said latch housing and movable between an extended position whereat a portion thereof projects out from said door edge through said edge plate aperture and a retracted position whereat said latch member is contained bodily within said door edge; said lever is pivotally mounted within said case and operatively connected to said latch housing at one end and to the apex of said connector plate at its other end for moving said latch member to said extended position when said lever is in a first position and to said retracted position when said connector and lever are in a second position; said latch cam plate means pivotally mounted within said case for rotating about a main axis and including latch-bar-engaging surfaces for receiving torque in either direction about said main axis; said latch cam plate means also including cam surfaces selectively engageable with leg ends of said connector plate for converting torque applied to said cam plate to movement of said connector plate and lever to said second position.

5. The lock apparatus of claim 4, wherein said latch mechanism also includes a biasing means for biasing said lever and connector to said first position.

6. The lock apparatus of claim 4, wherein: said latch cam means includes two plate members of substantially identical configuration spaced from one another along said main axis for independent rotation thereabout with said connector legs selectively engaged by either of said cam plate members; said latch-bar-engaging surfaces of said cam plate members being engageable by bar means inserted into opposite sides of said lock case for applying torque to one or the other of cam plate members.

7. The lock apparatus of claim 4, including: a dead bolt mechanism also supported within said lock case including a bolt spindle extending through said case and along said main axis for transferring torque to said dead bolt mechAnism, a dead bolt slidably mounted within said case and movable through one of said edge plate apertures between an extended position whereat a portion thereof projects out from said door edge and a retracted position whereat said dead bolt is contained bodily within said door edge, and a bolt crank means supported by said spindle with one end thereof engaging said dead bolt for moving said dead bolt toward said extended position when torque is applied to said bolt spindle in a first direction and for moving said dead bolt toward said retracted position when torque is applied to said bolt spindle in a second direction opposite to said first direction.

8. The lock apparatus of claim 6, including: a dead bolt mechanism also supported within said lock case including a bolt spindle extending through said case and along said main axis for transferring torque to said dead bolt mechanism, a dead bolt slidably mounted within said case and movable through one of said edge plate apertures between an extended position, whereat a portion thereof projects out from said door edge and a retracted position whereat said dead bolt is contained bodily within said door edge, and a bolt crank means supported by said spindle between said cam plate members with one end thereof engaging said dead bolt for moving it toward said extended position when torque is applied to said bolt spindle in a first direction and for moving said dead bolt toward said retracted position when torque is applied to said bolt spindle in a second direction opposite to said first direction.

16. The combination latch and dead bolt lock mechanism according to claim 9 wherein the latch is spring loaded to project from the lock mechanism, and the means for reciprocating the latch include a pivotally mounted lever which is operative to retract the latch against the bias thereon, and a V-shaped latch connector, the apex of which is interconnected with the lever, and the legs of which are interconnected with the knob spindles and individually responsive to longitudinally applied end forces thereon to rotate the lever about the pivot thereof.

20. The knob spindle according to claim 19 wherein the one operating member has lugs thereon which project radially inwardly of the recess and engage abutments on the other operating member.

21. The knob spindle according to claim 20 wherein the one operating member takes the form of a sleeve, and the other operating member takes the form of a bolt spindle, one end portion of which is inserted in the bore of the sleeve.