Patent GB-190114964-A (GB)
Title: Improvements in Locks.
Inventor: KATZENBERGER OSCAR
Filed: 1901-07-23
Granted: 1902-06-12
Abstract: 14,964. Katzenberger, O., Johnson, W. W., and Surkey, G. July 23. Latches; sliding- bolts; locks, permutation; safes.- Relates to locks and fastenings for safe and other doors. The casing C, which is shown as secured in a mortise in the door, consists of side plates 10, end, top, and bottom plates 11, and a face-plate 12, screwed together by bolts or screws. On the sides of the door are arranged face-plates 38, 39, which are preferably secured together by bolts 41, passing through the inner plate 38 and engaging nuts formed on the inside of the outer plate 39. In one corner of the casing is pivoted a spring- controlled lever 13, which has a In, and projection adapted to engage a bolt or latch 19 working in a U-shaped guide 20. The bolt 19 is normally maintained in the shot position by the lever spring, and is retracted by means of a follower 22 mounted on a knob spindle, the finger 23 of the follower being adapted to engage a flange on the lever. 13. A bolt D is arranged to slide in the face-plate 12 and on a guide-pin- 27, and is operated by the finger 23, which engages a recess in the bolt. The bolt can be retained in the shot or retracted positions by means of a pivoted locking- bar E. In the shot position, the head 33 of the bar engages behind a pin 28 on the bolt, and, in the retracted position, the pin 28 engages a recess 32 in the bar. When in the locked position, the bolt can readily be released from the inside of the door by means of a pivoted lever 35, one end of which engages under a projection 34 on the bar E. By depressing the free end of the lever, the bar is raised clear of the pin 28, and the bolt D can be withdrawn by the operation of the follower. The locking-bar is controlled from the outside by means of one or more tumblers F operated by knobs &c. 51. Each tumbler is in the form of a capped disc having a flat portion. When the disc is turned so that the flat portion is in contact with the bar, the bolt is free, but, when the curved portion of the disc is in contact with the bar, the bar is in the raised position, and locks the bolt. The disc F is loosely mounted on a pin supported in the casing, a socket on the end of the pin projecting through the casing and forming a connection for the spindle 50 of the knob 51. A spring 49 is interposed between a washer on the pin and the disc, the tension of the spring being sufficient to cause the disc to turn with the pin. A group of depressions 53, Fig. 3, is formed in the inside of the plate 39 round the opening for the spindle 50. A spring tongue 55 is provided to engage these depressions, and preferably forms a portion of a spring plate secured to the spindle 50. A space 54 is left between two of the depressions, and this forms a zero point. Upon turning the knob, the engagement of the tongue with the depressions can be heard or felt by the operator. The discs can be so arranged that they are all in the position for releasing the bar E when the knobs are turned to form a predetermined combination. The combination may be altered by turning the bolt D until the pin 28 lies over the head 33 of the bar, thereby preventing the discs F from turning. The knob or knobs can now be rotated independently of the discs and a new combination obtained. Numerals &c. need not be produced on the outside of the plate 39.