DE192060C - - Google Patents

Description

PATENT OFFICE.

PATENT LETTERING

-Λ! 192060 ^ CLASS 68 ^. GROUP

FRIEDRICH GIESE in LÜBZ i. Meckl.

Patented in the German Empire on December 29, 1906.

There is already a device for securing 'door locks, through which the Key inserted into the lock and turned from inside through one on the key handle slidably mounted, in the lock body insertable slide prevents the reverse rotation is, for the purpose of pushing the key out of the lock from the outside for the purpose of forcibly opening the lock

ίο impossible to do. With the well-known Device, the safety slide is designed such that it is after turning the key in the lock into the part of the keyhole intended for inserting the key bit.

i5. can be inserted; the safety slide sits on a sleeve that is on the Key handle is slidably supported by a square cross-section. Since here the safety slide is also accessible from the outside If you want to insert the keyhole yourself, a special device is necessary to do this sliding the slider out of the keyhole for subsequent rotation and ejecting the key from the outside impossible. To the end is at the Sleeve a resilient lever pawl and are corresponding on the key shaft of this lever pawl Ratchet teeth arranged.

The disadvantages inherent in this known device, the arrangement of the mold the keyhole adapted, extensive slider that makes the key unwieldy, the complexity of the device, the arrangement of a resilient ratchet lever, the longer Use, especially after the spring has rusted or become paralyzed, will soon fail completely, are more prevalent with the device Invention avoided. The safety slide, which is slidably mounted on the key handle is formed here by a bracket bent from a piece of wire, the legs of which follow Turn the key through a right angle into suitable small holes in the lock plate can be introduced. Since these small holes are completely inaccessible from the outside, pulling the safety slide out of the blocking position from the outside is almost entirely impossible. Since in the case of the present invention, the safety slide is mounted in a longitudinal slot of the key shaft, which Key shaft itself can therefore be round, so it is possible here, for the purpose, to also have a to exclude accidental, unintentional pulling out of the bracket from the locked position, one more thing special very simple and reliable see hanging device to be arranged in such a way that thread is cut into the round key shaft and that a small thread is cut on this Thread rotatable nut pressed against the bracket inserted into the small holes can be.

Show on the drawing

Fig. Ι and 2 the design of the key.

Fig. 3 shows the lock with the key inserted in a front view.

The part of the key shaft protruding from the keyhole has one with the handle and beard lying in one plane through-

65

going slot α , in which a bracket b made from a piece of wire by bending is slidably mounted. On both sides of the keyhole holes c are drilled into the lock plate and into the underlying material of the door, so that when the key is inserted, the legs of the bracket can be pushed into the holes. If the lock is to be secured after locking, the key is turned in such a way that the plane of the handle and beard (and thus also that of the slot α and the bracket b) comes to lie horizontally. Then the legs of the bracket can be inserted into the holes, and twisting of the key from the outside is prevented.

In order to prevent the possibility of using a tool inserted through the keyhole to push the bracket out of the holes from the outside and then turn the key and push it out of the keyhole, a thread and a small nut are now cut into the slotted part of the key shaft d placed in front of the bracket. If the nut is tightened with the bracket inserted, any possibility of removing the secured key inserted from the inside from the lock from the outside is completely excluded.

Claims (2)

Godfather sayings: 1. Door lock safety device, consisting of a key with a key on the key shaft sliding, to be inserted into the lock or the keyhole plate, turning and pushing out the key the lock preventing slide, characterized in that the ends directed against the lock of the wire Curved like a bow, in one. Longitudinal slot of the key handle guided slide in holes in the lock plate or keyhole plate located on the side of the keyhole can be plugged in. 2. Door lock safety device according to claim 1, characterized in that the from the Keyhole excellent part of the • Wrench shaft thread for a nut (d) which secures the bracket against being pushed out of the holes. 1 sheet of drawings.