Patent GB-802651-A (GB)
Title: Crimping tool
IPC: H01R43/042
Filed: 1954-12-23
Abstract: 802,651. Crimping tools. AMP, Inc. Dec. 23, 1954 [Dec. 23, 1953; Sept. 20, 1954], No. 37196/54. Class 61. A tool for crimping electrical connectors comprises dies carried by a crimping head and by a support member which head and support slide relatively to one another during the crimping operation, the head comprising a central limb having two arms extending laterally in opposite directions one arm carrying a die which cooperates with a die on the support and the other arm having an element which is arranged to abut against an element on the support at the end of the crimping stroke, whereby the crimping head is positively aligned with respect to the said die support member. In one construction the tool comprises a handle 32, Figs 2 and 13, which is integral with a U-shaped head 30 and to which the other handle is pivoted at 44. Secured by pins 36, 38, 40 to the head 30 is aT-shaped member 34, Figs. 2 and 7, which carries on each side of its central limb 33 a pair of fixed crimping dies. Of these four dies two, 74 and 76, serve to crimp a connector or terminal to the bared wire, and they are formed integral with the member 34. The other two dies 84, 86, which are for crimping the connector to the wire insulation, are adjustably mounted in the head, the adjustment being effected by a pin 96, Figs. 13 and 14, having flat surfaces formed on it at different distances from its axis. This pin passes through a slot 98 of a spring-pressed member 82 carrying the dies, and is positioned by first depressing it against the action of a spring 102, rotating it to the desired position, and then releasing it so that a pin 104, Fig. 2, thereon engages in one of four recesses 106 in the member 34. The four corresponding movable dies are carried by a plunger 42 which slides within the head 30 and which is slotted at 50 for the passage of a limit stop pin 44 mounted in the side limbs of the member 34. As stated above this pin 44 forms the pivot for the handle 52 ; the forked arms of the handle embrace the plunger as shown in Fig. 14. A link 58 is pivoted at 56 to the plunger and at 60 to the handle, this link being under the action of a spring 57 and having a finger piece 110. The member 34 is formed with grooves 40, Fig. 7, in which are slidably mounted slides 112, 114, Fig. 2, which are urged by springs towards the spaces 64 between the fixed and moving dies. These slides, which serve to position the connector correctly for the crimping operation, can be moved singly away from the fixed dies by either a forward or backward pivoted movement of a lever 136, fitted with a finger piece 140, the rear surface of this lever engaging with lips 146 of the slider as shown in Fig. 13. Action. By the arrangement of the pivots 44, 56, 60, as shown in Fig. 2, the handles are locked in the open position. The dies 84, 86, are first appropriately positioned and the connector or terminal inserted in one of the spaces 64 and correctly located by one of the slides 112, 114. Finger pressure on the part 110 of the link 58 then moves the plunger 42 to bring the moving dies up to the connector and the handles are then closed to complete the crimping operation. Deformation of the T-shaped member 34 is prevented by reason of the fact that extensions 170, 172, Fig. 2, thereon are engaged by the end of the plunger when the handles are closed. The tool is provided with a ratchet device 54 of known construction. Modifications. In modifications the closing of the handles produce a movement of the member 34, with its dies towards fixed dies carried by the head. As shown in Fig. 26, the member 21, corresponding to the member 34 of the construction described above, has integrally formed dies 35 and adjustable dies, which four dies co-operate with dies such as 36 carried by a platform 30 secured by pins within a U-shaped part of one handle 32. The member 21 has a shank 22 which slides within the platform and the latter carries a pivot pin 28 to which a link 24 (corresponding to the link 58 of Fig. 2) is pivoted. The handle 31 of the tool is pivoted at 34 to the link and at 25 to the slide. Thus, when the tool is used for crimping, the pivot 34 will rotate about the pivot 28 and the pivot 25 will move downwards carrying with it the dies 35. Fig. 26 shows the parts in the open and closed positions of the handles. In other modifications, Figs. 32-41 (not shown), the member 21 is movable as in Fig. 26 and is connected by linkage to the movable part of a pistol-like handle, whereby crimping is effected by the squeezing together of the fixed and movable parts of the handle. Specifications 750,047, 801,436, 801,437, 801,438 and 802,652 are referred to.