US2350092A - Door lock - Google Patents

Description

May 30, 1944. c. s. BocK DOOR LOCK med Nov; 22, 1941.

2 Sheets-Sheet 1 1NVENT0R.

ATTORNEYS.

May 30, 1944- c. s. BocK f 2,350,092

' Doon Lock A Filed Nov. 22, 1941 i '2 shuts-Shut 2 y Il fj @Il Ca. S. Boojf Patented May 30, 1944 DOOR LOCK Charles S. Bock, Chicago, Ill., assignor to Andrew Hoiman, Chicago, Ill.

Application November 22, 1941, Serial No. 420,105

.5 Claims.

My invention relates to door locks, and more particularly to the type called panic locks and used for escape purposes in schools, factories, etc., in case of re or other emergency. Locks of the type under consideration are usually made in right and left hand forms, so as to be applicable according to the location of the closing side of the door. Or, certain parts of the locks are designed in alternative forms, to make either form available according to the type of lock installation. These characteristics make universal locks more expensive, requiring both forms of the lock or parts thereof to be available in stock at all times in order to supply orders for one form or the other.

In view of the foregoing condition, my main object is to provide a lock which is constructed as a unit for use either in the right-hand or lefthand position, whereby to make a single form of lock serve both purposes.

A further object of the invention is to provide a lock in which no change whatever need be made in order to adapt it to either the right-hand or left-hand position.

Another object of the invention is to provide a lock which has few parts, and is therefore eX- tremely simple.

With the above objects in View, and many others which may suggest themselves from the description to follow, a better understanding of the invention may be had by reference to the accompanying drawings, in which- Fig. 1 is a fragmentary elevation of a door which closes at the right-hand side, showing one form of the improved panic lock mounted thereon;

Fig. 2 is a similar view showing the lock inverted and mounted on a door closing at the lefthand side;

Fig. 3 is an enlarged elevation of the lock shown in Fig. 1, partly broken away:

Fig. 4 is a section on the line 4-4 of Fig. 3 partly broken away;

Fig. 5 is an interior view of a modication, with a portion of the cover removed;

Fig. 6 is a section on the line 6-6 of Fig. 5 and showing the cover; and

Figs. 7 and 8 are, respectively, enlarged sections on the lines I-I and 8--8 of Fig. 5.

As is well known, a re or emergency door always opens outwardly. The application of a panic lock prevents the door from being drawn open from the outside, but enables it to be pushed open from the insidewhen pressure against a lever is applied. While a panic lock could be mortised or otherwise encased withinthedoor.`

it is a more simple matter to make the lock as a separate unit and apply it directly to the inner side of the door. l

Specic reference to the drawings indicates the casing of the improved lock at I0, such casing having a base II which is secured to the inner` side of the door I2 by means of screws I3. I have also shown a keeper unit I4 mounted on the jamb or door frame I5 at a point opposite the lock I, the keeper unit also having a base I6 which is secured to the jamb or door frame by screws Il. f

The end wall Illa, of the casing I0 which faces the keeper I4 recedes to some degree `in an .inward direction, the face of the keeper being designed accordingly. While this is vnot a novelfeature, the purpose of it is to afford better clearance between the door and the keeper on the closing movement of the door.

The casing Il! `is formed with a pairpof ribs yor braces I8 in the center, these ribs being spaced to accommodate the lock bolt I9 between them; The latter is of sector shape, being verticallypiv. oted at 20 between the ribs I8 whereby to swing between the full-line and dotted-line positions indicated in Fig. 4. Thus, when the bolt is in the advanced position denoted by full-lines, its periphery cooperates with a rib 2l of the keeper to prevent the door from being opened, so that this can only occur when the bolt is retracted to the dotted-line position. The bolt is backed by a spring 22 which advances the bolt when it has cleared the keeper. Thus, on the closing movement of the door, the bolt trips the keeper rib 2l like a latch, locking the door.

The control of the bolt from the inner side of the door is usually accomplished in conventional panic locks by va vertical lever carrying a push plate. Thus, the design of the lever must .be adapted for the right-hand and left-hand positions of the lock, as contemplated in an earlier section, making it necessary to carry two types of locks or levers in stock.

In order to render the instant lock adaptable to either the right-hand or left-hand position of a door, I have designed the control lever 2,3 to extend in a horizontal directionfrom the lock casing, developing the lever into an oval lpush plate 24 whose instruction is legible at either Dosition of the lock as indicated in Figs. 1 and 2.

The lock casing I0 also has a pair ofr posts 2.5 in the region of the lever 23, these being vertically spaced to receive between them a hub 26for'ming an enlargement of the lever. The hub is'vertically pivoted between the posts 25 on a pin 21, and it is inwardly extended toward the base of the casing with a pawl 28.

The pawl 28 of the lever 23 is normally behind a back ange 29 extended from the shank 3l) of the bolt I9. Thus, when the push plate 24 is pressed from the full-line to the dotted-line position of Fig. 4, the pawl 2B impinges upon the back flange 29 of the bolt to retract the same, the changed positions of the affected parts being indicated by dotted-lines.

In the original form of the lock, the casing base II has an inward lug 3| to form a back stop for the bolt; and the casing receives a cover 32 tomatch the keeper I4 and provide a receptacle 33 for the remote end of the spring 22. The cover 32 is secured to the casing by screws or other suitable means indicated at V34; Y

It will be evident from the above description that I have provided a panic lock construction which enables one form of lock to be. employed for either a right-hand or left-hand closing door, thechange from one position to the other requiring only the turning of the lock to inverted position and no adjustments or replacements. Further, the control of the lock bolt is accomplished vby a simple, double-lever action, which translates the forward or pressing movement of the push plate 24 into a lateral pivoting movement of the bolt I9.` Thus, the described form of the lock has only: two principal moving parts of solid construction, making it economical to produce and durable over a long period of use. VThe modification of Figs. 5 to 8 deals primarily with the original form of the lock, but includes two .features generally found inkey-controlled doors. One ofthese features is an optional keycontrol to enable the door to be opened from the outside; and the other is a dogging device to keep the door in an unlocked condition.

For the key-control, the cover 32 is formed with a cavity 36, and the casing base II is perforated at 31 in registration with the cavity to journal a horizontal post 38. The base of the latter seats in the perforation 3l and contains a narrow slot 39 into which extends the tail piece 40' of a conventional cylinder lock 4 I, operated by a key 42. The object of the post' 38 is to enable the bolt I9 to be retracted from the outside of the door by the manipulation of the key 42. For this purpose the post carries an oblique cam wing 43 `which is adapted to enter behind the back ange 29 of the bolt when the key 42 is rotated to move the cam wing from the full-line to the dotted-line position of Fig. 5, or in the direction of the small arrow there shown. The back iiange 29 is-thus crowdedagainst the spring 22 and retracts the bolt. f I yThe clogging device is intended to retain the bolt in the retracted position in case thedoor is to be kept unlocked temporarily. It is in the form'of `a post 45, with ends joumaled in the cover and casing base asl indicated at 4G. Near the base the post 45 has a lateral spur 4l; and theppposite end of the post is flush with the outside of the cover, such end containing a. key slot 4 8., Thus, when the dogging device is inactive, the'position of'the spur 4'I is at one side of the working parts in the center of the lock, as indicated by full-lines in Figs. 5 and 6.v VHowever, when the dogging device is to be applied, the push plate 24' is vadvanced to swing the pawl y28 andvretract the bolt as indicated in Fig. B. A special key to't the slot 48 is now inserted in the post 45 and operated to turn the same and locate the spur 41 in the dotted-line position of Fig. 5. Fig. 8 shows that the spur is now behind the'pawl 28, locking the same in the advanced position, so that the bolt is maintained in the retracted position.

It is now apparent that the novel lock can be made either plain or with the additional service featuresdescribed, all without adding external parts or aiecting the simple structure and operation of the main working parts or the universal application of the lock.

While I have described the original and modied forms of the invention along specific lines, various minor changes and refinements may be made without departing from its principle, and I desire to consider all such changes and renements as coming within the scope and spirit of the appended claims.

` Iclaim:

1. A lock for emergency doors comprising a casing, a latch bolt therein and retractablel to permit the door to be opened outwardly, the action of the bolt being on a vertical pivot, a push plate opposite the inner side of the door, a substantially-horizontal lever extending from the push plate into the casing, and means between the lever and the latch bolt to swing the same in the retracting direction when the push plate is pressed toward the door, said means comprising a vertical pivot for the lever in the casing. a pawl extended from the lever beyond the pivot, a back flange of the latch bolt in front of the pawl, the pressure of the latter on the back flange procuring the retractive swing of the latch bolt, and a spring directed to the front of the back iiange to resist said retractive swing.

2. In a lock for'emergency doors, a casing, a latch bolt therein and retractable by swinging action on a vertical pivot, a back flange extended from the latch bolt, a lever pivoted vertically in the casing and extended with a pawl, the swing of the lever in a given direction causing the pawl to impinge on said back flange and secure said swinging action of the latch bolt, a horizontallypivoted post alongside the back flange, and an oblique cam carried by said post, the rotation of the post to advance the cam crowding the latter against the back ange and securing the retraction of the latch bolt.

3. The structure of claim 2, said casing being mounted on a'door with a cylinder lock, and said post having a receptacle for the tail piece of the cylinder lock to procure said rotation from the cylinder lock key.

4. In a lock for emergency doors, a casing, a latch bolt therein' and retractable by swinging action on-a vertical pivot, a back flangeextended from the latch bolt, a lever pivoted vertically in the casing and extended with a pawl, the swing of the lever in a given direction causing the pawl to impinge on said back flange and secure said swinging action of the latch bolt, a` horizontallypivoted post alongside the back ange, and a side projection carried by said post, the post being rotatable to crowd the projection against the back of the pawl and lock the latch bolt in the retracted position.

5. The structure of claim 4, said post having its outer end exposed through the front of the casing, and such outer end being slotted to receive a special key for the rotation of the post.

CHARLES s. Bock.

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