DE402592C - Cylinder lock - Google Patents

Description

There are box locks with tumblers are known in which a particularly high safety is achieved in that the key first passed through a blind passage through the whole lock needs to be then rotated and retracted by one against the EinführungsöfF-voltage offset slot, so that his beard at get further rotation in the area of the lock parts

ίο can.

The known cylinder locks with tumblers were previously considered so safe that they did not seem to need improvement. It has been found, however, that Attempts to open them unauthorized, although often unsuccessful, but that of the ones for the extraction from imprints used for the production of duplicate keys remains in the Remained behind the castle, which is now the

ao use of the lock is no longer permitted, even with the associated key.
This disadvantage is eliminated in the present invention by transferring the arrangement of a blind passage known in box locks to cylinder locks while maintaining the previous security, because then the lock parts are not accessible for the introduction of foreign objects and foreign objects do not find a hold in the blind passage, rather when the key is inserted be pushed through.

Like this transfer while preserving the individuality and the two-sided usability a cylinder lock with tumblers is shown below Example set forth with reference to the drawing.

In the drawing shows

Fig. Ι a vertical section through the cylinder lock,

Fig. 2 a section along line AB in Fig. I,

Fig. 3 the beard part of the key,

Fig. 4 the back of the lock,

Fig. 5 the front view of the key box.

The movement mechanism for the bolt saw once from the fixed cylinder a, from the rotatable cylinder b and from the key socket c. The stationary cylinder has some, for example four or five, openings d on two opposite sides of the inner wall, in which the tumbler pins are located, which are pressed inward by the springs e. On the movable cylinder there is a toothed, semicircular segment that engages in a rack of the bolt. The key belonging to the lock (Fig. 3) is inserted through the key socket, for which two opposing slots are provided in the rotatable cylinder. After insertion, it is rotated by 90 ⁰ and

ao a third slot reinserted in the lock by the fact that the closing end moves the key towards him. During this drawing in, the tumblers then move back according to the toothing of the key, so that the cylinder can now be rotated. The rotation by 180 ° is then brought to a standstill by snapping in the tumblers on the other side. The key can then. are withdrawn, ^{rotated 90 0} and pulled out again. The lock is opened in exactly the same way, the only difference being that the cylinder is turned to the other side.

Claims (1)

Patent claim: Cylinder lock, characterized by. the arrangement of the tumblers in one special slot separated from the key guide so that the key can be inserted into In a manner known per se, only passed completely through the key guide and must be turned in order to penetrate said slot and to be able to arrange the tumblers. Fig. Ι. Fig. 2. Section B Fig. 3. Fig. 4. Fig. 5.