DE379187C - Safety locking device - Google Patents

Description

Safety locking device. Forms the subject of the invention a safety locking device without special springs.

Fig. Z shows the cross section through the assembled device in a cylindrical housing.

Fig. 2 shows the position of the lock washers when the lock washer is pulled out Key.

Fig. 3 shows a locking ring washer after removing the for this purpose belonging movable safety disc, as shown in Fig. 4.

Fig. J shows the drive plate with guide pin for the hollow key and driving pin.

Fig. 6 shows the guide piece.

Figure 7 shows the position of the lock washers when the key is inserted.

Fig. 8 shows the effect of the lock washers with a suitable one Key.

Fig. 9 shows the effect of the lock washers on a non-matching one Key. Fig. 1o shows the shape and mounting of an intermediate disk, which the Prevents the balls from falling out of the bearings.

Fig.rr shows the key.

In a cylindrical recess of the apparatus to be protected or in a special housing a rotatably supports a round drive plate b, which is provided with a drive pin c and a guide pin d for the key. The guide piece e with the guide tube f rests on the drive plate b. The disk and tube of the guide piece have a slot g (Fig. 6) to accommodate the key bit. The disc also contains an arcuate slot lt for the driving pin c. In addition, the tube is milled in two places along its entire length to accommodate protruding balls.

Movable, resilient lock washers zi (Fig. 4), which also have a slot k for the key bit, are mounted around the guide tube in such a way that two inclined planes 1 projecting inside the washers encompass the key tube at the flattened points m and the two in the incisions i of the ring f touch the protruding balls yt (Fig. 2).

The (movable lock washers u are surrounded by the fixed lock washers shown in Fig. 3, which, in addition to a notch for the key bit, have a nose o which fits into a cutout of the housing (Fig. 2) to prevent rotation Ball p (Fig. 2) inserted into 3/4 holes ro (Fig The outer diameter of the movable locking washers u corresponds to the inner diameter of the associated fixed rings (Fig. 3), but it is different for the individual superposed washers Movable locking washers u have a resilient effect, so that the balls inserted into the circumference are pressed into the recesses with every rotation In order to prevent the inserted balls from falling out of their bearing positions, thin metal sheets are placed between the individual locking washers, which with the two lugs q (Fig. io) fit into the incisions i of the guide tube f and can be taken along by turning the key tube. Above the plate r (Fig. I), which serves to support the guide tube f, there is still an insertion piece s (Fig. I) for the key. All parts are held together by the cover plate t (Fig. I).

The drive plate b (Fig. 5) is by means of a not shown Coupling organ, polygon, slot, screw or the like, for which in the bottom of the Housing an opening is provided with the moving part of the secured Object connected.

The beard of the key shown in Fig. Ii is stepped and the height of the steps is such that the steps exactly fill the slots in the various movable locking washers (Fig.7). If a beard step is too low with the wrong key (Fig. 9), the corresponding movable lock washer u (Fig. 9) will not be taken when it is turned. Instead, the guide piece e with the tube f will tend to move in the direction of rotation, but this is hindered by the inclined planes l (Fig. 9). A rotation of the movable lock washers and thus a shift of the inclined planes is excluded because the balls n act by pressure on the inclined planes in such a way that the balls p cannot emerge from the bearing points and thus prevent rotation of the movable lock washers u. If the beard is too high, it protrudes into the incision in the fixed locking ring washer (Fig.3) and thus prevents any rotation. When the key is removed, the two balls fix the movable locking washers and the guide piece together with the tube f in order to prevent automatic rotation due to vibrations or the like and the resulting blockages of the keyhole. The length of the arcuate slot h in the guide piece e is dimensioned so that the drive plate b only executes the partial rotation required for the special case with one full turn of the key (90 °, 18o °), but the drive pin c during the remaining part of the rotation slides along the slot h.

Claims (3)

PATENT CLAIMS: i. Safety locking device for holders, taps, Locks o. The like., Characterized in that several, around the key tube-shaped Part of a rotatable guide piece stored and with a slot for the key bit provided, different sized, movable and resilient locking washers of fixed ones, also equipped with incisions for the key bit Lock washers surrounded and so with the housing and the key tube-shaped Part of the guide piece are associated with that when the key bit is too high by its entry into the incision of the fixed disk, and if it is too low Bart, as a result of not taking the movable spring lock washers with him inside projecting inclined planes attached to the resilient locking washers and attached through the circumference of the key-tube-shaped parts of the guide piece, Balls protruding from the grooves prevent the key from turning will. 2. Safety locking device according to claim i, characterized in that that in depressions on the circumference of the resilient locking washers protruding balls in recesses in the inner recess of the Fixed ring washers surrounding movable lock washers jump in and thus an automatic rotation of the movable discs when the key is removed impede. 3. Safety locking device according to claim i, characterized by the arrangement of an arcuate slot in the guide piece for the pin of the Drive plate to achieve the necessary partial rotation of the drive with one full turn of the key.