Patent GB-625306-A (GB)
Title: Improvements in or relating to machines arranged to secure a barrelled terminal element to an end portion of a wire
IPC: H01R43/048
Filed: 1947-02-28
Abstract: 625,306. Eyeleting. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). Feb. 28, 1947, No. 5774. [Class 43] A machine for securing a barrelled terminal element, or eyelet, to the end of a wire comprises eye-forming means which move to and fro past co-operating means and which, during this movement, act progressively along and form into an eye the end of a wire placed between said eyeforming means and said co-operating means, means being provided for clenching the terminal element with its barrel in said eye, the barrel being inserted in the eye either during or after formation of the latter. One machine, Fig. 3, comprises a fixed anvil 10 having at the base of a pilot 13 an annular, upsetting shoulder 14, below which said anvil is surrounded by a compression spring 15, which abuts against part of the frame of the machine and supports a sleeve 16 surrounding the anvil 10. The sleeve 16, provided with an upstanding finger 17, the upper end of which lics beneath a reciprocating upper setting tool 20, has a helical slot 22 of steep pitch which is engaged by a pin 23 fixed to the anvil 10, so that when the sleeve is depressed against the action of the spring 15 it is simultaneously turned round the anvil 10 through somewhat less than 270 degrees, the finger 17 moving in an arcuate path round the pilot 13. The upper tool 20, the feed shoot for supplying eyelets and the parts for actuation thereof closely resemble those described in Specification 176,519, [Class 43]. In operation, the end of a wire 18, bared of insulating material, is placed between the finger 17 and pilot 13, after which the main shaft of the machine is caused to make one revolution only. During this revolution the spindle 25 of the upper tool 20 picks an eyelet 21, head uppermost, from a feed shoot, the tool 20 presses the eyelet down the pilot 13, and the engagement of the head of the eyelet with the finger 17 results in depression and turning of the sleeve 16 so that the finger wraps the end of the wire 18 round the pilot 13 and forms an eye therein. As this eye is being formed, the barrel of the eyelet 21 is being thrust through it, the last part of the turning motion of the finger 17 and clenching of the eyelet against the shoulder 14 of the anvil 10 taking place at the same time. Finally the sleeve 16, under the action of the spring 15, and the tool 20 return to their initial positions, and the set eyelet is removed from the pilot 13. In another construction, Fig. 8, the anvil 131, having a pilot 134 and an annular upsetting shoulder 133, has a cylindrical shank 132 mounted for rotation about a vertical axis in the bed 130 of the frame of the machine ; the eye-forming finger 135 is mounted for up-and-down sliding movement in an eccentric portion of the anvil 131, and is normally held up by a spring 136. Turning of the anvil 131 and hence of the finder 135 is effected by a rack bar 141 in the bed 130 engaging pinion teeth 142 on the shank 132 of the anvil, the bar being actuated by a bell-crank lever connected by a link to the lever which actuates the upper setting tool 110, and hence being reciprocated in timed relation to the up- and-down movements of said tool. In operation, the end of the wire is inserted between the finger 135 and pilot 134, and the machine is set in motion, whereupon the anvil 131 turns causing the finder 135 to wrap the end of the wire round the pilot 134 to form an eye, and the spindle 111 of the tool 110 picks an eyelet 152 from the feed shoot 120; the tool 110 then depresses the finger 135 and drives the eyelet down the pilot 134 and through the eye, until finally the eyelet is clenched against the shoulder 133. The tool 110 and anvil 131 now return to their initial positions, rotation of the main shaft is arrested, and the set eyelet is removed from the pilot 134. Specification 144,711, [Class 43], also is referred to.