Patent GB-1487124-A (GB)
Title: Electrical connector and termination devices therefor
IPC: H01R12/67
Filed: 1975-09-23
Abstract: 1487124 Electrical connectors ITT INDUSTRIES Inc 23 Sept 1975 [30 Sept 1974 27 Nov 1974] 38929/75 Heading H2E A contact 20 (Fig. 1) includes a base portion 22 having a tubular section 34 at one end. A first slot 38 in section 34 defines a pair of resilient arcuate side walls 41, 42, a second slot (40), Fig. 3, not shown), opposite to slot 38 terminating short of the end 36 of section 34. A conductor 62 comprising a core covered by insulation is forced, preferably at an angle to the longitudinal axis of the contact 20, into the slots 38, (40), the edges of slots 38 piercing the insulation so as to bite into the core, whilst edges of slot (40) cut into the insulation to provide strain relief. A tool 80 (Fig. 21), for inserting the insulated conductor 62 into the contact 20, comprises an elongate body 100 having a bore within which is a pin 104 that defines with the periphery of the bore a space 106 for receiving the tubular section 34 of the contact 20. A slot 110 is dimensioned to snugly receive the insulated conductor 62 and extends at an acute angle with respect to the longitudinal axis of the tool 80, the free end of the pin 104 terminating adjacent the bottom of the slot 110 so as to provide a support for the conductor 62. Upon movement of a contact 20 into space 106, therefore, the conductor 62 in slot 110 is presented at the correct angle into slots 38, 40. A multiplicity of contacts 20 may be mounted in two parallel rows of cavities 86 in a section 78 of an insulative housing 76 (Fig. 14), the tool 80 forming a second section thereof. The conductors 62 are lead through an aperture 124 in a shell 122 each then passing along a respective slot 120 in the tool 80 which communicates with a respective slot 110. Relative longitudinal movement of the sections of the housing 76 terminates the conductors 62 in their respective contacts 20. In a further embodiment, Fig. 19, the conductors 62<SP>1</SP> pass through respective bores 168 and are bent by hand into respective slots 178. The two rows of contacts 20<SP>1</SP> are orientated such that slots 38<SP>1</SP> face in opposite directions which is the opposite to that of the Fig. 14 orientation. The two sections 76<SP>1</SP>, 80<SP>1</SP> are moved together until latching fingers 160 engage behind shoulders 164. In a further embodiment (Figs. 15 and 16, not shown) the contacts (130) have mounting tails (132) inserted in holes (134) of a printed circuit board with slots 38, 40 lying in a common plane. Thus the contacts (130) may be terminated to flat conductors (138) of a flat cable (140). In yet a further embodiment (Figs. 17 and 18, not shown), the contacts 20 (Fig. 1) are mounted in a row with the slots 38, 40 parallel. A flat cable (146) having round conductors (148) may then be forced downwardly on to legs 58 60 of the contacts 20 which pierce the cable insulation. Each contact 20 as described has a slot 38 that from front end 36 has equally spaced cutting edges 44, 46 terminating in diverging portions 48, 50 that taper to a plane that is parallel to base portion 22. Bowed spring contact members 28 and a resilient retention finger 32 may be provided, together with a tab 97<SP>1</SP> (Fig. 14), which together locate the contact 20.