US1388712A - Door-bolt - Google Patents

Description

C. HOFFMAN.

DOOR BOLT.

` APPLICATION FAILED JULY 16| |920. 1,388,712,v Patented Aug. 23, 1921.

UNITED STATES PATENT oFFlcE.

Doon-Bom.

Specification of `Letters Patent.

`Pzttellted Allg'. 23, 1921.

Application filed July 16, `1920. Serial No. 396,696.

To all whom t may conce/m.'

Be it known that I, CARL HOFFMAN, of Allentown, in the county of Iieliigh and State ot Pennsylvania, have invented certain new and useful Improvements in Door- Bolts; and I do hereby declare the following to be a full, clear, and exact description et the invention, such as willenable others skilled in the art to which itappertains to' make and use the same.

My invention relates to locking devices tor doors and more particularly to such as are adapted tor locking the door in its fully closed position as well as in a partially opened position.

The object oi' my invention is to provide an improved, simple, and highly efficient lock oi this character embodying but few parts which will not readily get out o1 order, the coperating parts of the locks being so arranged that they may not be easily tampered with.

In the drawings, Figure l is a view in perspective showing' my improved lock in the position it occupies in locking the door in tully closed position, a portion ot a door and its casing being shown. Fig. .2 is a cross sect. nal view of a portion of' a door and its casing with the locking bolt in position where the door may be partly opened, Fig'.` 23 is a view similar' to Fig. 2 with the door locked in a slightly opened position. Fig. 4l a bot-tom plan view ot the bolt and auxiliary keeper, showing the catch fo r preventing turningl of the bolt.

At 'l I have indicated a casing which includes a slideway for a bolt 2 having at one end a manipulating handle At its opposite end the bolt has a lateral projecting' stud d which when the bolt is turned axially so as to bring its handle 3 in an upright position will assume a similar position. .es shown in l the parts are in the position just described and the extreme end 5 of the bolt is within the keeper 6 of the striker plate. ,Extending outward trom the striker plate are a pair of vertically alined ears 7 which form the pivotal support for an auxiliary keeper 8. I have shown this auxiliary keeper formed from a single piece of metal bent back upon itself, its ends being pivoted to the ears 7 and the bowed portion 9 at its opposite end forming a stop for the bolt. Stops l0, 12, on the auxiliary keeper eooperate with the stud 4 in maintaining the door locked in a partially opened position, a

catch 13 on the casing l being designed to be moved into engagement with the handle 3 to prevent the bolt being' turned when the parte' are in the position described.

In the `use of my improved door bolt, with the parts as shown in Fig. l, the door is locked in its fully closed position, and the stud l being in line with the upper ol the ears7 prevents the bolt being retracted. It the bolt is moved to the point where it engages the ear it will have lett the keeper G and the door may be opened, the stud ridingl along the ear and then engaging the auxiliary -keeper 8. Continued opening oi the door will cause the keeper to turn on its pivot, the stud continuing to engage the keeper. It will. be seen that this construew tion permits the door to be released for slight opening, but prevents a lull opening. The measure ol protection afforded by such a structure is apparent. The door is not fully released from its lock until the bolt is turned so that its stud is freed ot the ears of the auxiliary keeper. Frequently it is desirable to have a door slightly opened for purposes of ventilation and it is desirable that it may be locked against undue opening1 as well as against slamming. The auxiliary keeper is use'lul to this end. With the bolt engaging the outermost portion ot the auxiliary keeper it is turned so that its stud ll projects downward, as indicated in Fig. d, and into engagement with the stop '12. So turned the handle 3 is pointed downwardly and is in a position to be engaged by the catch 13 which will prevent the bolt being turned. The stop l() will cooperate in a similar manner as the stop l2 to prevent slamming of the door.

The advantages ot my improved lock will be apparent. It will be seen. that I have provided a positive door lock as well as a means for retaining the door in a partially locked position, and I have also provided in this latter means a way by which the door may be fastened for ventilation purposes without the necessity ot' employing any stop at the base of the door for contacting with the floor.

I claim as my invention:

1. A fastening device for a door including a sliding bolt, a keeper on the door trame to receive said bolt, an auxiliary keeper also on the door frame and with which said bolt may be caused to engage to lock the door in a partly opened position, and .means in part carried by said bolt and in part b said auxiliary keeper to maintain said bo t and said auxiliary keeper in locked engagement, said boltl being adapted for turning movement to free it of engagement with said auxiliary keeper.

2. A fastening device for a door including a sliding and rotatable bolt having va laterally projecting stud near one end, a keeper on the outer frame to receive said bolt, an auxiliary keeper also on thel door frame and with which said bolt may be caused to engage to lock the door in a partly opened positlon, a stop on said auxiliary keeper with Vwhich said stud isdesigned to coperate to maintain said bolt in locking engagement with Said auxiliary keeper, and a catch to prevent turning of said bolt to disengage the said-stud and stop. Y

3. A fastening device for a door including a sliding and rotatable bolt having a laterally projecting stud near one end and a handle at its opposite end, a keeper on the door frame to receive said bolt to lock the door in closed position, an auxiliary keeper also on the door frame and having a hinged connection therewith and with which said bolt may be caused to engage to lock the door in a partly opened position, stops on said auxiliary keeper with which said stud may be caused to engage upon turning the bolt to maintain the bo t in locking engagement with said auxiliary keeper and a catch coperating with the handle of the bolt to prevent turning of the bolt to disengage said stu'd and stop.

In testimony whereof I have signed this specification. f

CARL HOFFMAN.

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