Patent GB-364030-A (GB)
Title: Improvements in or relating to locking systems
IPC: E05B65/38
Filed: 1930-09-26
Abstract: 364,030. Fastenings controlled from a distance; combination locks. BREMAECKER, E. DE, 201, Avenue Longchamp, Brussels. Sept. 26, 1930, No. 28905. Convention date, Sept. 28, 1929. [Class 44.] In a system for controlling multiple fastenings from a distance and particularly applicable to the doors of automobiles, railway carriages, and other vehicles, bolts are moved to the shot and released positions by a double-acting member controlled by a combination lock. As described, sliding bolts are actuated by fluid-operated pistons, but the invention is applicable to bolts operated by electromagnets, and pivoted bolts may be used. A form of pivoted bolt is described. Two bolts 2, Fig. 1, are shot or retracted by fluid supplied to one side or the other of pistons moving in cylinders having inlets 4, 5 at opposite ends. Supply is effected from a cylinder 6 by moving its piston to right or left as required, the cylinder and piston constituting the double-acting device controlled by the combination lock, Fig. 2. Auxiliary cylinders 7a, 7b are connected to the supply conduits and have flap valves 12a, 12b allowing introduction of fluid should the conduit pressure fall too low, and outlet valves 10a, 10b uncovered by spring-loaded pistons 8a, 8b should the pressure rise too high. The lock, Fig. 2, comprises notched discs 15 biased to zero position by torsion springs 21, but rotatable by knobs on the upper ends of spindles 17 to set the discs to release position. The discs are retained in the set position by rollers 19 engaging in the recesses between teeth on wheels 18 coupled to discs 15 by clutch members 23 normally in engagement. The hand-operated piston-rod 13 has fixed projections 24, and yieldably mounted projections. 14 which yield to pass the discs 15 when the piston is moved downward to shoot the bolts, but prevent upward movement of the piston to retract the bolts: unless discs 15 have been set to predetermined position in which their notches register with the corresponding, projections 14. Downward movement of the piston causes projections 24 to actuate levers 20 to release clutches 23, the discs then being restored to zero or locking position by springs 21, so that locking of the bolts in shot position is automatic. Fig. 4 shows an arrangement in which the bolts 28 are themselves locked automatically in shot position in addition to the combination locking effected on the double-acting device. Fluid is supplied from the double-acting device (not shown) to conduits 25. When supply is effected to unlock the bolts, it first passes through a slide valve 33 to the right of piston 34 which is thus moved to withdraw a locking member 35 from a recess in bolt 28. Movement of member 35 operates through a fork 37 to set a slide valve 31 so that fluid is next supplied to the upper side of piston 30 and retracts the bolt 28. Movement of bolt 28 operates through a fork 32 to operate valve 33 to cut off fluid supply. Reversal of supply from the double-acting device to conduits 25 restores the arrangement to the locked position shown. The requisite differences of pressure for operating the bolts may be obtained from the exhaust or suction of the engine, or from brake pipes, &c.