Patent GB-191312413-A (GB)
Title: Improvements in or relating to Locks.
Inventor: OLSEN PETER
Filed: 1913-05-28
Granted: 1914-05-28
Abstract: 12,413. Olsen, P. May 28. Lock mechanism, lever type.-Relates to locks of the type in which the mechanism, instead of being directly set by the key, is pressed against the key-bit. In the form shown in Figs. 1 and 3, the bolt b is secured by divided pin mechanism d located within the bolt and within a fixed part f. The pins are actuated by the ends of levers u, the other ends of which are connected to slides q which can be moved by the handle levers m, n to cause the levers to abut against the bit of a key inserted in the keyhole 8. The handle levers are connected to the bolt-actuating spring c and compress this when turned, so that the bolt is withdrawn by the spring immediately the pin mechanism is set. The part f to which the bolt is secured by the pin mechanism is fixed to the casing by means of a hook-piece h. This can be disengaged from the inside by means of a knob 19 to enable the bolt to be withdrawn without the use of the key. In the construction shown in Fig. 7, pivoted lever mechanism 33 is employed, adapted to be forced against the key - bit by means of springs 35 actuated by a roller 48 when the handle 44 is turned. The bolt is normally locked by a bell-crank 38, the arm 40 of which is T-headed and interlocks with projections 42 on the bolt. When the levers 33 are set, a spring 53 presses a lug 39 on the bellcrank into the lever notches 37 and disengages the T-head 40 from the bolt. The handle arm 45 works the bolt through its spring 32, to which it is connected by means of a link 52. The lock can be operated from inside without using the key by turning the bell-crank counter-clockwise by means of a handle. In a modification shown in Fig. 14, the locking-levers are placed above the keyhole and fall on to the bit by gravity when released from a roller 81 normally held raised by means of a cam 82 operated by the handle. By turning the spindle 73 from inside, a slide 100 can be moved out of the path of the levers, so that these fall clear of the bolt projection 83 and allow the bolt to be withdrawn without using the key. Night-latches. - The bolt is returned to its locking position by means of its spring and by a coil spring 44 round the handle spindle, means being provided to retain the bolt withdrawn until the door is slammed. This may consist of a spring catch 62, Figs. 7 and 9, adapted to engage a lug 64 on the bolt and released when the door is closed by means of a lever 61. A modification is shown in Fig. 15, wherein a sliding pin 85 springs out when the door is open and removes a notch 87 out of the path of a projection on the bolt so that this is retained. Controlling operation.-A disk 21 mounted in the edge plate of the casing, so that it is covered when the door is closed, controls the operation of the lock. The disk can be placed in any one of three positions with reference to the hook h in Fig. 1 or to the bell-crank 38 in Fig. 7. In the first position, it holds the hook or the bellcrank inoperative so that the bolt can be withdrawn by the handle alone both from inside and outside. In the second position, it secures the hook or bell-crank against actuation from inside, and in the third position it sets the lock for operation from inside by the handle and from outside by the key. In another form, the handle spindle of the hook h or bell-crank 38 is controlled in the same way. Picking, preventing.-When the bolt handle is turned to set the mechanism and withdraw the bolt, the slides q, in the form shown in Fig. 1, and the levers 47 carrying the roller 48, in the form shown in Fig. 7, are moved to cover the keyhole to prevent the use of picking implements. Master - key mechanism. - The locks are arranged for use with a master key. The bit of the master key is cut away so that it can turn in the keyhole to engage with the notches 28 of the levers. The extent of the turn of the key for each lock of the series varies, and the notches 28 are made to correspond so that the levers of any of the locks can be set by the key.