1
Reaves Jr A Lee: Cable testing circuit employing a pair of diodes to detect specific conductor pair conditions. Western Electric Company Incorporated, Kamstra William H, June 18, 1974: US3818329 (24 worldwide citation)

A test circuit in which the difference between the junction resistances of a pair of semiconductor diodes when forward biased and when reverse biased is employed to detect whether a conductor pair of an electrical cable is good, open, shorted, or reversed. A first and a second test bridge, one inclu ...


2
Madden James Joseph: Printed wiring board terminal assembly. Bell Telephone Laboratories Incorporated, Kamstra William H, February 12, 1974: US3792412 (24 worldwide citation)

A printed wiring board terminal assembly in which an adapter sleeve is inserted between the plated surface of a terminal hole and a terminal pin. The adapter sleeve is fashioned to present a plurality of longitudinal contacting nodes which expand radially to make electrical contact with the plating ...


3
Braune David Paul: Printed wiring board assembly. Bell Telephone Laboratories Incorporated, Kamstra William H, June 25, 1974: US3819989 (12 worldwide citation)

A printed wiring multiple circuit board assembly fabricated from a single blank, flexible tape carrying a plurality of conductors extending to circuitry carried by the circuit boards. The boards are arranged at right angles to a main tape at the end of tape tabs carrying branching conductors to a bo ...


4
Miller Harry Lloyd: Telephone subscriber line terminating test circuit. Western Electric Company, Kamstra William H, June 4, 1974: US3814870 (7 worldwide citation)

A telephone line terminating test circuit for simulating a subscriber line subset to provide a properly timed off-hook signal responsive to a ringing current applied to the line. During precutover testing of a telephone switching system, the test circuit connects a subset simulating resistance acros ...


5
Hetherington Irvine Keers, Pritchett Robert Leonard, York Robert Kenneth: Integrated circuit switching network providing crosspoint gain. Bell Telephone Laboratories Incorporated, Keefauver W L, Kamstra William H, January 15, 1974: US3786425 (6 worldwide citation)

An integrated circuit thyristor switching network in which a parasitic pnp transistor effect, normally encountered as a result of the junction isolation employed, provides a crosspoint gain rather than the loss previously presented by the thyristor. When a thyristor crosspoint is switched to its on ...