GB694608A - Improvements in open-sided socket wrenches - Google Patents

Abstract

694,608. Wrenches. TUBING APPLIANCE CO., Inc. July 3, 1951, No. 15723/51. Class 61(iii). An opened sided socket wrench for applying torque to coupling nuts on pipes comprises a head 102 at the end of a handle and having an open sided slot 106, an open sided socket carrying member 108 rotatably mounted in the head and means for aligning the slot in the member 108 with the slot in the head. The member 108 is provided with a part cylindrical flange 110 which fits snugly against the inner face of an inturned flange 109 on the head, the member 108 being supported in the head by a cover plate 104. The slots in the head and socket carrying member are aligned by depressing a headed pin 160 mounted in the head, against the action of a spring 161 the member 108 being rotated until the pin engages a shallow recess provided in the flange 110. Detachable sockets 123 are secured to the member 108 by a spring pressed metal ball 127 which engages a detent 128. To prevent the socket from turning on the socket carrying member, the longitudinal edges adjacent the open side are turned inwards to engage with squared off portions on the longitudinal edges adjacent the opening in the socket carrying member. In a modification co-operating spline like means are provided on the socket and socket carrying members. The socket 120 is provided with spline like teeth 122 for engagement with a coupling nut. Ratchet. teeth 135 are provided on the socket carrying member 108 and two sets of pawls 136, 137; 138, 139 are mounted in the head, each set being connected by a pull spring 143. Each pawl has an enlarged journalled end 141 of circular periphery mounted in a cavity in the head. To operate the pawls, a shift yoke 145 is provided comprising an arcuate base 146 which fits a cavity in the head, and two shifting lugs 148, 149 extending at right angles to the base and positioned respectively between the two pawls of each set. When the wrench is being driven in a clockwise direction the pawls 137, 139 are held in engagement with the ratchet teeth 135 by moving the yoke in a counterclockwise direction which causes the pawls 136 and 138 to be swung out of engagement. To drive the wrench counterclockwise the pawls 136 and 138 are held in engagement with the teeth by moving the yoke in a clockwise direction.