GB1065822A - Improvements in locking arrangements for securing a member such as a screw against rotation - Google Patents

Abstract

1,065,822. Locking-screws. ENGLISH ELECTRIC CO. Ltd. Jan. 24, 1964 [Jan. 28, 1963], No. 3403/63. Heading F2H. [Also in Division H2] A polygonal screw-head, e.g. the hexagonal head (14) of a terminal screw screwed into a hole in a block (10) to secure an electric cable, is locked against unscrewing by a member (16) with a polygonal socket, e.g. with twelve grooves (17), and with an arm (18) with a slot (19) (so that the socket can be adjusted angularly to allow the screw-head to be secured in any angular position) through which extends a small screw (20) screwed into a hole in the block (10) to secure the socket member (16). The slot (19), when the screw (20) is loosened, allows the arm (18) to move through an angle half the angle between adjacent apices (17) of the socket. Another small screw hole (22) in the block (10) is located at a position, e.g. at a position which is half the latter angle away from a location diametrically opposite the first small screw hole, so that the effective range of movement of the arm (18) is doubled by choice of the two screw holes and the main screw-head (14) may be secured in any angular position. The length of the slot (19) may be reduced if further screw holes are provided. The slot may be in the block (10) instead of in the socket member (16) or it may be in both. There may be a number of slots.