DE402597C - Safety lock with expanding springs - Google Patents

Description

GERMAN EMPIRE

ISSUED SEPTEMBER 19, 1924

REICH PATENT OFFICE

PATENT LETTERING

- JVl 402597 - CLASS 68 a GROUP 100

(H 93537 IIl \ 68a)

Wilhelm Hofmann and Hans Gäthje in Frankfurt a. M.

Safety lock with expanding springs. Patented in the German Empire on May 3, 1923.

The invention relates to a safety lock with expanding springs and is used in all types of locks and as a coupling Use. The invention consists in particular in that the expansion springs bearing mandrel has a circular cross-section and the springs in cross-section as well are curved in an arc. As a result, the locking parts are mutually ίο rotatable, and therefore there are no points of attack for violent destruction with pliers or crowbars.

In the drawing shows

Fig. Ι one half of the lock with the expanding springs, Fig. 2 the second half,

Fig. 3 a section through the plugged-together closure,

Fig. 4 the same section with the introduction of the key, ao

Fig.s the key.

The closure (coupling) consists of a union sleeve α with a mandrel b, around which the closing springs c are arranged. on

the -ScBJiei ^ fesdern c is attached to a molding strip d. The counterpart e is a bow, "att * which is located on the upper part of a gate-like opening / for the introduction of the key η and which is provided on the inside with a guide tube g , which guides the key through a molding h . The bottom i the sleeve is pierced. the. size of the opening k entsprichjt the thickness of the dome b with the therearound closing springs c, when they are pressed together. the edge of the hole K in the soil i has a groove t in which d in shape to the Fassonteiste the Closing springs c of the dome b fit. If the two parts of the closure are now pushed into one another, the mandrel b with the closing springs c seated around it slides through the opening k of the bottom i , ao and the barrel clamp d through the groove 7. Since the closing springs c are shorter by the thickness m of the can bottom i than the mandrel b, they jump apart at the moment in which the can bottom i touches the bottom of the union sleeve α and lock en (close) the lock (coupling). A key n, which is bent at right angles at one end, is used to open it. The part bent at right angles corresponds at its outer edge ο to the cross section of the guide tube g in the bushing e and has a groove q that fits the bar h in the guide tube g. The inside edge q of the key is precisely matched to the mandrel b with the spring tongue and the guide strip d on the spring e> . To open the lock, insert the key ti through the slot-like opening / and push it with the groove q onto the guide bar Vi and press it down, then with the groove r over the guide bar d to the bottom i of the bushing e; the springs c are compressed so that their cross-section corresponds to the opening k of the can bottom i; by pulling apart the lock opens. At the same time, the key is removed from the cathedral. The locking security is very extensive due to the many possible designs of the guide strips, on the one hand, and the corresponding formation of the key part bent at right angles, on the other hand.

Claims (1)

Patent claim: Security lock with expanding springs, characterized in that the expanding springs and the mandrel carrying the same have a circular cross-section Purposes of the rotatability of the closure. share to each other. Fig. U Fig. Fig. 2. Fig. ₃ . .-n