DE628600C - Cylinder lock with tumbler pins - Google Patents

Description

GERMAN EMPIRE

ISSUED ON APRIL 7, 1936

REICH PATENT OFFICE

PATENT LETTERING

CLASS 68 a GROUP

Cylinder lock with tumbler pins

Patented in the German Empire on November 16, 1933

One more thing about cylinder locks increased security against opening without giving the corresponding key, This is attempted to be carried out in such a way that the pin pairs with their separating surface into the contact area of the Seeks to bring the rotary cylinder and the cylinder housing, has already been proposed earlier, been to settle the tumbler pins so that they do not have a smooth cylinder surface have more, but essentially, from a middle thin part and two short ones Adopt leadership approaches that fit into leadership skills with little play. Such detached tumbler pins lay down when they are lifted with an auxiliary tool and with simultaneous rotation of the cylinder with its lugs against the pin guide holes surrounding surface elements of the rotary cylinder or the cylinder housing. Of the The use of such detached tumbler pins has hitherto been opposed to the concern that that the cylinder remains rotatable to a limited extent in the closed position and that the pin fuhruingslöeher wear themselves out quickly can because when moving the tumbler pins through the key and at the same time involuntary rotation of the cylinder, the lugs of the pins at the mouths of the holes slide along with resistance and gradually widen them so that the exact fit the tumbler pin is reduced precisely at the most important point.

In order to eliminate this disadvantage, according to the present invention, the expanding cylinder, which is also known per se with cylinder locks with smooth pins provided with a spring-loaded rotary knob. This rotary knob is given a special shape, Ulm to make the rest resistance as high as possible, but the wear and tear on it to exclude if possible, but in particular also to avoid a change in shape of the Guard locking pin guide holes by pressure and to avoid friction of the detent. For this purpose a Cut a groove into which a cylindrical detent body of such length is inserted is that it covers a plurality, possibly all of the pin guide holes. Between the bottom of the groove and the cylindrical detent body, a spring is inserted, which the latch body always pushes outwards so that it is in the closed position of the The cylinder is placed in a keyway cut in the inner wall of the cylinder housing is.

In the accompanying drawing, in
Fig. Ι the cylinder pin lock shown with an inserted key. All pins are arranged so that the lock cylinder can be rotated.

*) The patent seeker stated as the inventor:

New Year's Eve in the Schönebers district of Berlin.

Fig. 2 shows a cross section along the line AB .

Fig. 3 is a cross section through the cylinder in the locked state, i.e. when it is pulled out. Key.

Fig. 4 shows in a cross section along the line CD of Fig. 3, the cylinder and a pair of tumblers in the position that corresponds to an attempt at opening, and
ίο Fig. 5 the rotary cylinder alone in a section through the notch groove ^; Line EF of Fig. 4.

The rotary cylinder is denoted by 1,

the cylinder housing with 2, the key cross-section with 3. 4 is the one in the cylinder Inner pin, which in this case is shown as a smooth cylindrical pin, jund 5 buckets of the remote external pin, which is under the pressure of the spring 6. With 7 it is in the rotating cylinder incised: denotes groove, 8 is the cylindrical detent body guided in this he, 9 the plumage lying between the base of the groove 7 and the detent body 8, 10 the keyway cut into the cylinder jacket 2.

During an attempt to open the cylinder, as shown in Fig. 4, it was turned to the left. If a normal smooth pin is used instead of the stepped 5 ', after it has been lifted as far up as possible with the inner pin 4' against the pressure of the spring 6 ', when: - Perhaps going back to the mouth edge 11 of the pin hole place on the cylinder. Since the pin 5 'is offset, however, it offers resistance to lifting, as shown in the drawing (it can only be pushed into it in guide hole 12 / ”when the cylinder returns to its normal position : (Fig. 2). Such scanning attempts require a very fine instinct. This feeling is ^{eliminated in the embodiment 1 of} the lock according to the present invention that the scanning end, when the cylinder rotates, the resistance of the keyway 1 o 'has to overcome the detent body 8 to be pushed out. The detent 8 to 10 thus serves a double purpose: During normal use of the lock, in which a slight side pressure is almost always involuntarily exerted on the key, it prevents the approaches of the Pin tumblers wear the mouths of the pin guide holes, and with scanning attempts it disturbs the sensitivity of the person being scanned, so that he is not able to touch the ■ contact surfaces of the To bring pin pair with the mating surface between the cylinder ι and the cylinder housing 2 in accordance. One of the usual ball catches can also serve this purpose to a limited extent. According to the present invention, however, the aim is to further increase the scanning reliability by means of a detent with a particularly high rotational resistance with the lowest risk of wear and tear. For this purpose, the catch 8 is designed as a cylinder which covers the pin guide holes, in the illustrated example (Fig. 5) all holes. Damage to the cylinder mating surface and the mouths of the pin guide holes is avoided in this way, since the detent body pipe runs smoothly over all interruptions in the cylinder guide surface. It is also not necessary to make the spring 9 particularly strong. Their pressure can be relatively low, because the long guide track of the detent body 8 with the keyway 10 gives an unusually strong detent resistance even without strong spring pressure.

Claims (2)

Patent claims: 1. Cylinder lock with tumbler pins, characterized by the common Use of tumbler pins with a stepped cylinder surface and a lemer springy detent between the rotating cylinder Lind cylinder housings that unscrew the cylinder from the closed position difficult. 2. Cylinder lock with tumbler pins according to claim 1, characterized in that that the spring detent consists of a cylindrical detent body which is in grooves between the rotary cylinder and its housing under spring pressure and is of such a length that there are several or all pin guide holes covered. 1 sheet of drawings