GB656407A - Improvements in panic bolts - Google Patents

Abstract

656,407. Panic bolts. EDSON, A. D., and TULL, L. S. April 19, 1949,. No. 11432/48. [Class 44] In a panic bolt device for doors having locking rods 13, 14, Fig 3, and a depressable releasing bar 23 on the inner side of the door and release means operable from outside the door comprising an operating box c, Fig. 5, having an operating handle 32 journalled in its outer face and a bush 41 in axial alignment with the handle 32 and in operative connection with the locking rods 13, 14, being journalled in its inner face, the handle 32 is rigidly connected to a rotary member 34 within the box which is connected to the bush through a lostmotion connection permitting independent limited rotation of the bush 41. The rotary member 34 has a flattened or recessed portion 46, Fig. 4, for engagement in a tangential direction by a key-operated locking plate 47 in sliding contact with the wall of the box c so that the rotary member and the handle can be locked to prevent their rotation. The rotary member 34 which is attached to the handle by fixing screw 35 and radially extending mating projections on the engaging faces or by pins and dowels 36 extending parallel to the axis, is formed with a partly circular rib 39, the ends of which may be engaged by a lug 40 on the bush 41. Radial pins 37 engage a stop 38 for limiting the rotation of member 34 to about 90 degrees. The locking rods 13, 14, are rigid with slide members such as 16 having inclined slots in which pins 19, on a reverser block 20, engage a square sectioned spindle 30 connects the block 20 with the bush 41, which latter is journalled in a cover plate of box c. To retain the rods 13, 14, in the released position, the slide member 16 is recessed at 55 to receive a spring pressed plunger 54. A sleeve, slotted at 59 for co-operation with a lug 58 on bush 56, may be provided for rendering the plunger 54 ineffective.