US1418872A - Key-locking device - Google Patents

Description

W. A. HOLQUIST.

' KEY LQCKING DEVICE.

. APPLICATION HLED} APR-7.1921.

1,418,872. PatentedJune 6, 1922.

INVENTOR:

W/LL/AM A. HOLQUIST,

iii? ST WILLIAM A. HOLQUIS'I, OF LOS ANGELES, CALIFORNIA.

KEY-LOCKING DEVICE.

T 0 all whom. it may concern Be it known that I, VVILLIAM A. HOL- QUIST, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Key-Locking Device, of which the following is a specification.

This invention relates to devices for engaging a key so that the key cannot be removed from the lock; more particularly holding a door key, placed in the key-hole of a door from the inside, so that the key cannot be pushed in from the outside.

One of the objects of this invention is to provide a simple and durable device, easily put in place and easily removed, but not removable from the outside.

Another object is to provide a device made of a single piece of material requiring no locking within itself.

Other objects will appear from the following description as well as from the accompanying drawing, in which- The figure is a front elevation of the device.

With common door locks, a key can normally be used from both sides of the door, the key-hole extending through the lock and through the whole door. If a key is placed in the keyhole from the inside of the door, it can normally be pushed out of the door and lock from the outside; and, a skillful manipulator is even able to unlock a door with the very key, left in the lock from the inside to prevent the use of another key from the outside, by manipulating from the outside with such a key. If a key is left within a lock of a door, it is usually with the intention or with the idea in mind to prevent the inserting of a pass-key or any other key from the outside, and thereby making a common lock more secure. From the above, it appears, however, that the leaving of the key alone is not suflicient, and that skillful manipulators have found ways and means to turn a key, left in a lock from the inside, from the outside. Means must be found and provided to hold a key, left in a lock from the inside of a door, against movement and manipulation from the outside of the door.

The device illustrated in the accompanying drawing is intended to hold a key 1921. Serial No. 459,433.

against turning movement and thereby preventing a pushingout of the key from the outside.

The device is preferably made of wire in form of a bent yoke to be hung over the knob of a door.

A wire is therefore bent upon itself so that its two ends 1 and 2 terminate at practically the same distance from the main. body 3. This main body of the device is curved to easily slip over the stem of a door knob, an approximate cross section of a stem of a door knob being indicated at 1, the wire curving in on both sides of the knob, as indicated at 5 and 6.

The device is preferably made of spring material, so as to easily slip over the stem of a door knob and, in engaged condition and. position, capable of engaging around the stem of the door knob in the manner illustrated.

From the curved portions 5 and 6, both ends of the wire curve outwardly, as indicated at 7 and 8, and again curve inwardly as indicated at 9 and 10, and once more curve outwardly as indicated at 11 and 12.

A key 13 is normally inserted into a keyhole 14 in an upright position, so that the handle of the key is practically in alignment with the upright key-hole.

F or using this device, the key is turned to a practically horizontal position, as illustrated in the drawing. The two ends 1 and 2 of the device are inserted through the handle of the key 13, the device being then practically in a position between the door and the door knob proper around the stem 4 of the knob, so that, on a further movement downwardly, the bent portions 11 and 12 snap through the handle of the key below the handle and the bent portions 5 and 6 snap around the stem 4 of the knob to a point below the stem, as illustrated. The key is then prevented from turning by the bent portions 7 and 8 above the handle of the key and by the bent portions 11 and 12 below the handle of the key. In this position, the key cannot be turned from the outside, nor can it be pushed out from the outside towards the inside of a room.

Having thus described my invention, I claim:

In combination with a door knob and a key, a locking member comprising an elon- Specification of Letters Patent. Patgnted June 6, 1922, Application filed. April '2,

gated body bent upon itself forming a my invention I have signed my namein the nearly circular portion to engage aronndothle presence of two subscribing witnesses. door knob a ainst n Ward shift/in ot1 f Y 1 ends extendifig farth r downwardl? to a wlLLlAM HOLQUlb'l' 5 point to pass through the handle of the said Witnesses:

key to prevent a turning of the key. 0. H. KRUEGER,

In testimony that I claim the foregoing as JESSIE A. MANooK.

Images