Patent GB-150390-A (GB)
Title: Improvements in and relating to locking devices
IPC: E05C9/04
Filed: 1919-05-23
Abstract: 150,390. Collier, A. R. May 23, 1919. Night latches; multiple-bolt fastenings; latches, sliding; sliding bolts.-A multiple fastening for doors includes a latch with an inner key-operated sliding tongue and vertical sliding bolts which are actuated by indoor and outdoor handles in conjunction with the key, arrangements being possible by which (a) the door can be secured from the outside so that it can only be released by using the key upon the outside (b) the latch can be engaged, and the bolts shot and secured from the inside, so that the door cannot be opened from the outside, (c) the fastening can act as a simple latch controlled by the indoor handle only, by both handles, or, in a modif cation, by the indoor handle and also by a key from the outside. The vertical sliding bolts may operate additional securing-devices, and means are described by which the bolts are held in the shot position. Fig. 2 shows the fastening secured from the outside and set for operation (a). To release it, the spindle 11 is turned by a key, whereupon cams 12 engage a tooth 13 upon a tongue 8 sliding within the latch-bolt 5, this movement withdrawing a part 18, Fig. 20, of the slider from a recess 19, Fig. 12, in one of the vertical bolts 1. Hitherto the bolts could not be moved, and both indoor and outdoor handles were thereby locked against rotation. After retracting the slider, however, the outdoor handle can be turned, the cams 15 withdrawing the vertical bolts into a position where a part 17 upon one of them blocks the slide 8 against return. The handle spindle, Fig. 9, is made in two parts 111, 110 socketed together, some lost motion being permitted by a crank 6 on the outdoor part moving between arms 20, 21 on the indoor part. The latter carries also a cam 22 which, towards the end of the movement of the handle, acts upon a lever 23 to withdraw the main latch 5, while at the same time the crank 6 presses up a double vertical stop 24, which comprises an inner rod 46, Fig. 20, engaging a recess 25 in the slider 8, and an outer sleeve 45 engaging a recess 255 on the latch 5. In this position, a portion 41 of the latch lies in a notch 40 of the vertical bolt, and blocks it against further operation by the handles. The door s now unfastened. and can be swung open, and upon release of the handle a spring 7 may come into operation to hold up the stop 24, and to project into the path of the crank 6, and so prevent the outer part of the spindle from turning sufficiently far to draw the latch. (b) If the door be now closed upon the inside, the sleeve 45 may be withdrawn by a finger-piece 42 to release the latch, which is then pressed forward by its spring 9 and passes out of its blocking engagement with the vertical bolt, which can therefore be shot by turning the inside handle. Additional means, such as a bar 30, Fig. 10, pivoted to a guide bracket 32, and engaging one or other of slots 31 in the bolt can then be brought into action, whereupon the door is secured at three or more points, and cannot be opened from the outside. (c) Upon closing the door upon the inside, without withdrawing the sleeve 45 or shooting the bolts, the fastening acts as a simple latch operated by the indoor handle, but the outdoor handle is blocked by the pin 7, and is therefore inoperative. If the pin 7 be withdrawn, and held out by suitable means, the outdoor handle also is effective. In a modification, the slider 8 is arranged to be movable by the key sufficiently far to withdraw the latch completely. To secure the door again for operation (a), the sleeve 45 is withdrawn, releasing the latch 5 and setting the bolts free for operation. The spring 46 presses down the inner stop rod 46 and sets free the slider 8, which is, however, still held back by the part 17 on the bolt until, when the latter has been shot by the outdoor handle after closing the door, the slider is pressed forward by its spring 10 into the recess 19. The main bolts 1 may be arranged, as shown in Figs. 11 and 16, to operate additional fastenings 35 simultaneously.