Electrical testing of cords terminated with modular plugs

Details Electrical testing of cords terminated with modular plugs Electrical testing of cords terminated with modular plugs

1978-12-22

1980-10-21

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 73R, G01R 3102

Patent

active

042296919

ABSTRACT:
Telephone cords (13--13) which are terminated with modular plugs (11--11) having an array of spaced blade-like terminals (17--17) are tested for continuity and for test voltage breakdown by simultaneously engaging the terminals in the plug at each end of the cord with an array of spaced test probes (30--30) in which adjacent probes are staggered along the lengths of the terminals. In a four conductor cord, alternating ones of the terminals at each end of the cord are engaged by test probes which connect the terminals in an isolated series loop of a test circuit (40) in which a first one (41) of the loops is connected to a secondary winding (86) of a test voltage input transformer (85) with the secondary winding also being connected through a primary winding (91) of an output detector transformer (90) and then to a second one (60) of the loops. Should a breakdown between adjacent terminals occur, which is manifested by a breakdown between loops when a test voltage is impressed thereacross, a voltage is caused to be applied across the secondary winding (95) of the detector transformer (90) to cause an output which is indicative of a defective cord.

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