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    • 85. 发明专利
    • Improvements in Registering Locks.
    • GB190702162A
    • 1907-07-25
    • GB190702162D
    • 1907-01-28
    • WELLS ELISHA FORDLUMMUS JOHN NEWTON
    • WELLS ELISHA FORDLUMMUS JOHN NEWTON
    • 2162. Wells, E. F., and Lummus, J. N. Jan. 28. Locks, key.-Relates to a registering-device for locks, by means of which the number of the key last used to open the lock is automatically registered. The device is shown applied to a padlock. Mounted in the casing 10, to bear against the curved side thereof, is a guide-piece 15 with peripheral slots 16 in which are carried segments 17, Fig. 10, bearing numerals on their outer surfaces and provided with projecting pieces 18 , with which the key bit is adapted to engage to place certain numerals opposite apertures 18 in the casing, according to the key used. In the part 18 of each registering-segment 17 is pivoted a pawl 20', which is caused by a spring 21 to bear against the wall of the casing, and thus retain the segment in any position into which it is placed by the key. Pivoted on a screw 22 in the casing is a plate 21 which, under the control of the spring 27, tends to return all the segments 17 to their zero position. Normally, however, the plate is retained in a position corresponding to the key last used by a spring pawl 30 engaging the ratchet teeth 33. In unlocking, the parts being in the position shown in Fig. 1, the key is inserted in the position shown dotted and turned in a clockwise direction. The key bit first raises the locking-lever 46 and then withdraws the bolt 40. The key cannot then be turned back, owing to the shape of the keyengaging part 48 of the lever. On continuing to turn, the key bit engages the lever 34 and thereby releases the pawl 30 from the ratchet 33 and allows the plate 21 to return all the segments to their zero position. The key bit next comes into contact with the projecting arms 18 of the seg. ments 17 and moves these along, the particular segments moved, and the distance each is moved from zero depending on the particular key used, so that the number of the key appears through the openings 18. The key can then be withdrawn. The belt is shot by the spring 41.