Patent GB-190009420-A (GB)
Title: Improvements in and connected with the Doors of Safes and Strong Rooms.
Inventor: CHUBB HARRY WITHERS
Filed: 1900-05-22
Granted: 1901-05-22
Abstract: 9420. Chubb, H. W. May 22. Safes and strong-rooms; locks, time and permutation; sliding bolts.-The door a of a safe or strong-room is made of a single plain p l a t e of " Harveyed " steel &c., and has hingepin plates b and the lock casing c connected thereto. The upper bolts e, f and the lower bolts g, hare connected by links to plates k, r, provided with racks which engage a pinion n mounted on a spindle o. This spindle has a head s, which, when the door is closed, engages with a recess t formed on the end of a spindle, which is driven from the outside of the strongroom by a shaft y and suitable gearing, such as a worm and wheel and connection clutch z. The clutch z is preferably thrown into gear by a lever 4 actuated by a time, combination, or other lock 5 in the inside of the strong-room wall, so that any movement of the shaft y to move the bolts e,f, g, h by a crank handle &c. is inoperative except when the lock is in the open position. A spindle 7 is provided for arranging the mechanism of the combination lock in the required position. After the bolts have been withdrawn, the continued action of the shaft y may be caused to operate pushers, plungers, or cam plates to open the door, or such pushers &c. may be operated independently by an arrangement of hand and connecting levers. In some cases, such as when the door and door frame are furnished with interlocking projections and recesses, it is necessary that the door should move parallel to itself when beginning to open. To accomplish this movement, the hinge carriages are mounted in slides 55, Fig. 6, and moved outwardly by means of the screw and nut 56 gearing with a worm 57, or by rack and pinion gearing. The gearing may be operated, simultaneously with the operation of the pushers &c., by the shaft y or by levers &c. The door bolts may be actuated and the door opened by means of an electric motor started and controlled by means of a time lock, or by means of suitable devices placed outside the safe. Where a time lock is employed, means are provided for preventing damage to the lock guard or other part when such guard is in action to prevent the withdrawal of the bolts. The guard bolt 17, which is only free to enter the casing 18 when the lock is not in action, is carried by a sliding piese 19, which may be moved by means of levers 20, 21, 22, and 23, when the bolt is "off-guard.' These levers are connected to keeper blocks or links 27, 40, 45, 45, pivoted to the bolts, the connections being arranged so as to allow a slight relative movement against the action of springs at some of the pivot pins, which are mounted in slots for this purpose. When the guard bolt 17 is "on guard" and the spindle o is operated so as to commence to withdraw the bolts, the resistance of the guard bolt causes the keeper blocks to move against the resistance of the springs, so as to bring projections on the blocks into contact with recesses formed in abutment plates 33 and 48, and thereby stop any further motion of the bolts and relieve the guard bolt &c. from any further strain.