Switching arrangement for telephone subsets using impulse-type p

Details Switching arrangement for telephone subsets using impulse-type p Switching arrangement for telephone subsets using impulse-type p

1976-05-24

1977-09-06

Claffy, Kathleen H.

179 81R, H04M 144

Patent

active

040469719

ABSTRACT:
A switching arrangement for telephone subsets having key-controlled selection units is described. The selection unit has three connection points and is replaceable. It includes a pulsing relay responsive to a pulse generator actuated by the selection keys. A bistable relay disables a speech circuit, and maintains a connection of a transmitting and feeding circuit extending through the selection unit.

REFERENCES:
patent: 3856982 (1974-12-01), Lawson et al.
patent: 3932707 (1976-01-01), Connolly et al.
patent: 3956596 (1976-05-01), Connolly et al.
patent: 3969592 (1976-07-01), Pipitone et al.

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