Patent GB-190106167-A (GB)
Title: Improvements in Locks for Fastening Means for Safes and Strong Rooms.
Inventor: CHATWOOD SAMUEL
Filed: 1901-03-23
Granted: 1902-03-20
Abstract: 6167. Chatwood, S. March 23. Safes and strong-rooms; locks, key.-Locks and fastenings for the doors of safes and strong-rooms are constructed so as to be readily removable. In the form shown in Figs. 1 and 2, the lock mechanism is enclosed in a case 1 inserted in a mortice or recess 2 in the door 3, and secured at the outer end to the door frame 5. The recess is formed between a plate 6 fixed to the door, and a box 8 fixed to the frame 5 and the plate 6. The mechanism comprises a sliding bolt 11, connected at one end by a pin-and-slot connection to a pivoted bolt 13, and adapted to be operated by a cam 16, mounted on a spindle or handle 17 and working in a recess in the bolt. The lock bolt 13 is pivoted in a recess 5<a> in the door frame 5, and is adapted, when the door is closed, to engage a recess 14<a> in the frame 14 of the safe body. When the bolt 11 is in the shot position, a bolt 22, operated by lock mechanism 23, can engage a recess 20 in the bolt to lock it in position. The mechanism 23 is operated by a key inserted through the hole 24, or by the knob of a combination lock, or otherwise. The cam 16 is secured upon a squired part of the spindle 17 by nuts 18, which also serve to draw a conical collar 17<b> on the spindle into engagement with a seat in the door. The nuts are tightened up by a box spanner inserted through tubes connected to the box 8 and lining of the fireproof chamber 3<b>. Rack-and-pinion or other gearing may be employed for moving the bolt 11. In a modification, shown in Figs. 4 and 5, the bolt 13 is formed with a recess or with holes 25, and a blocking-bolt 26, having projections 27 to engage the holes 25, is arranged at the back of the bolt 13. When the bolt 13 is retracted, the projections 27 engage the holes 25, but, when the bolt is shot, the blocking-bolt is moved so that the projections engage behind the bolt 13 and secure the same in position. The sliding bolt 11 and the bolt 26 are operated by means of a cam plate 28 mounted on the spindle 17. A. pin 29 on the bolt 11 engages a cam slot 30, and one end of a lever 31 engages a slot 32, the other arm of the lever being connected to the bolt 26. The end 30<a> of the slot 30 is concentric and the remainder of the shot eccentric with the spindle 17, and the end 32<a> of the slot 32 is eccentric and the remainder of the shot concentric with the spindle. By this arrangement, the bolt 26 is operated after the bolt 13 in locking, and before the bolt 13 in unlocking. The camplate 28 may be secured in the locking position by means of a lock bolt 34 engaging a notch in the plate, or by other suitable means. The box 8 for enclosing the lock case 1 is fixed to a plate 6 secured directly to the outer plate of the door. The box 8 and lock case 1 may be inserted through a cavity or recess in the wall of the fireproof chamber, such cavity being afterwards filled by a box charged with fire-resisting composition. According to the Provisional Specification, the bolt 13 may be made hollow and filled with material which will vaporize under the action of heat.