US1017289A - Door-lock. - Google Patents

Description

J T. GRZYBOWSKI.

DOOR LOOK. APPLIOATI ON FILED FEKZ, 1911.

v Patented Feb. 13, 1912. III: IEIET- i. q

UNITED STATES PATENT OFFICE.

JULIAN '1. GRZYBOWSKI, OF GRAND RAPIDS, MICHIGAN.

DOOR-LOCK.

To all whom it may concern:

Be it known that I, JULIAN T. GRZYBO\V SKI, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Door- Locks, of which the following is a specification, reference being had to the accompanying drawings. 7

This invention relates to improvements in door locks and especially with reference to the provision of improved means to prevent the key from dropping from the keyhole and getting lost or being removed by children and also for retaining the key in the look so that it cannot be turned or pushed out by a person who unlawfully attempts to enter through the door on which my improved lock is used.

The invention consists in the construction, combination and arrangement of devices hereinafter described and claimed.

In the accompanying drawings Figure 1 is a side elevation of a port-ion of a door provided with a lock with my improved key retaining devices showing'the key retaining slide in raised, disengaged position; Fig. 2 is a similar view of the same showing the key retaining slide in lowered, engaged position and showing the key in cross section; Fig. 8 is an elevation, showing the inner side of the plate provided with my key retain ing slide; Fig. 1 is a vertical sectional view on the plane indicated by the line a;a of Fig. 2.

The lock which is here indicated at 1 is a mortise lock, in the door 2, and may be made of any suitable construction but in accordance with my invention the key 3 of the lock has a reduced neck 4.

In the embodiment of my invention I provide a key retaining slide 5 which is movable across the circular portion 6 of the keyhole .7. The retaining slide 5 may be mounted in any suitable manner and by any suitable means and may be attached directly to the lock case where the lock is applied to the surface of a door. In the present instance and for the purposes of this specification I show my improved retaining slide on the inner side of a plate 8, which plate has a bearing 9 for the knob and also has a keyhole 10 which is coincident with that of the look. This plate is secured on the inner side of the door and is provided at a suitable distance from the keyhole with Specification of Letters Patent.

Application filed February 2, 1911.

Patented Feb. 13, 1912.

Serial No. 606,167.

projects into the slot 12 and co-acts therewith to guide the slide toward and from the keyhole. This pin has a head formed on one end disposed between the inner face of the plate 8 and the face of the door. Thus, in the event that the pin becomes loosened in said plate, it will not be entirely displaced therefrom so that its loss and the resultant erratic movement of the sliding plate 5 is obviated. The slide is provided with a screw 14; which engages a threaded opening thereof and the shank of which operates in the slot 11, the screw being provided at its outer end with a milled head 15 whereby it may be readily turned and also being provided with an annular shoulder 16.

The screw serves as a handle for operating the slide so as to raise the latter entirely clear of the keyhole or to lower the slide so as to cause its slotted end to extend across the circular portion of the keyhole and hence cause the slot 12 of the slide to engage the neck of the key, thereby preventing the key from being turned in the lock and also preventing it from being withdrawn from the keyhole from the inner side of the door or pushed out of the keyhole by an instrument inserted from the outer side of the door. By partly turning the screw the shoulder 16 may be caused to bear against the outer side of the plate so as to firmly clamp the slide in any desired, adjusted position. Hence by partly turning the screw in one direction the slide may be locked, either when it is in its lowered position, engaged with the neck of the key, or in its raised position so as to release the key.

Assuming that the slide is in its raised position, when the key is inserted in the keyhole it may be turned so as to operate the lock. When it is desired to secure the key in the keyhole, prevent it from being turned, and also prevent it from being taken out, the screw is partly turned in one direction so as to release the slide, the slide is then lowered so as to engage its slot 12 with the neck of the key and the screw is then turned in the reverse direct-ion so as to clamp the slide to the plate 8 with the slide in such lowered position.

It will be readily understood that my improved key retaining devices enable the key to be secured in the keyhole and in the lock so that it cannot be turned and so that it cannot drop out of the keyhole or be casually removed therefrom. Moreover when the key is in the lock and is secured in place by the slide the key cannot be turned by a person on the outer side of the door, nor can it be pushed out of the keyhole, andhence my improved device renders the lock practically burglarproof.

Having thus described my invention I claim:

The combination with a lock plate adapted to be secured to a door in spaced relation thereto, said plate having a key hole and a vertical slot therein above the key hole, of a slide movable upon the inner face of said plate and spaced from the door, a threaded pin fixed in one end of said slide and projecting through the vertical slot in said lock plate, a head threaded upon the outer end of said pin and adapted to bind against the face of the plate to rigidly secure the slide against movement, said slide having a longitudinal slot open at its lower end to receive the shank of a key, and a guide stud fixed in said lock plate adjacent the lower end of the slot therein and projecting inwardly, said stud extending through the slot of said slide and having a head formed on its inner, end disposed between the slide and the face of the door to maintain said slide upon the locking plate and the slot thereof in alinementwith the key shank.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

JULIAN T. GRZYBOXVSKI.

Witnesses F. E. BURLEsoN, F. G. VVA'rnRoUs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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