Patent GB-755278-A (GB)
Title: Improvements in or relating to forming terminal assemblies
IPC: H01R43/048
Filed: 1954-05-24
Abstract: 755,278. Making electrical components. BRITISH UNITED SHOE MACHINERY CO., Ltd. May 24, 1954 [May 25, 1953], No. 15160/54. Classes 83 (2) and 83 (4). Eyeleting.-A method of forming a terminal assembly by attaching a barrelled terminal element to a conductor wire comprises securing the element to the wire along a short length thereof, wrapping an adjacent length of the wire around the barrel to form an eye and clenching the element about the eye. The machine comprises a power-driven shaft 22 arranged to drive a cam-shaft 32 through clutch and brake mechanism 38 as disclosed in Specification 556,309, [Group VII]. An upper clenching die 31, within which is telescopically mounted an element conveying spindle 55, cooperates with a lower die 80 which is provided with a pilot 84 for receiving an element E from the spindle 55. A slit-forming finger 98 having a barrel-engaging surface lying between cutting edges which form two adjacent slits on the barrel B of the element is mounted to reciprocate in the lower die 80. In operation, the bared end of a wire W is positioned against an adjustable stop 76, a finger 106 and the pilot 84 as shown in Fig. 3. As the die 31 descends the spindle 55 picks up an element from a raceway 50 which is swung aside to allow the die to pass, and the spindle 55 engages the pilot 84 whereupon the spindle retracts into the die and the element is forced down along the pilot and into engagement with the finger 98 which forms slits in the barrel B and clenches the portion C around the wire W. The die 80 with the finger 98 still in engagement with the barrel B is rotated through approximately 315 degrees to form an eye, the finger relaxing its grip to allow the wire to feed freely. Towards the end of the rotary movement the finger is lowered until its barrel-engaging surface is continuous with the lower die surface 82 whereupon the element is clenched about the eye by further downward movement of the die 31. Movement of the die 31 is controlled by a cam 42 on the shaft 32 and a spring-loaded cam roller 44 and the raceway by a cam 48 on the shaft 32. Turning movement of the finger 98 and the die 80 is controlled by a cam 58 on the shaft 32 which rocks a shaft 64 carrying an arm 70. A segment gear 72 on the arm 70 meshes with a gear 74 on a shaft 92 attached to a sleeve 88 which surrounds and is fixed to the die 80. Movement of the spring-loaded finger 106 is controlled by the sleeve 88 part of which acts as a cam. A projection 114 on the finger engages in a slot 116 in the sleeve 88 when in the position shown in Fig. 3. After the portion C has been clenched and as the sleeve 88 commences to turn, the projection 114 is cammed outwards and moves the finger 106 out of engagement with the wire. Reciprocation of the finger 98 is controlled by a stationary cam 100 engaged by a lug 102 on the finger which projects through a slot 104 in the sleeve 88. The lug travels over the cam 100 on rotation of the sleeve. A modified adjustable stop 118 (Fig. 4) may be used in place of the stop 76 and the finger 106 dispensed with. Specification 625,306, [Group VII], also is referred to.