Signal switching device

Details Signal switching device Signal switching device

1976-10-13

1978-02-21

Robinson, Thomas A.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Retarded or delayed type

335112, 335152, 340166S, H01H 6714, H04M 100, H04Q 300

Patent

active

040754332

ABSTRACT:
Signal switching devices employing electromagnetic switching elements having particular application in the switching network of automatic telephone exchanges are disclosed. The switching devices are of the kind comprising an input and output signal line electromagnetic switching matrix. The switching devices include a cutoff circuit and/or off-normal circuit integrated with the switching matrix.

REFERENCES:
patent: 3464039 (1969-08-01), Takamura et al.
patent: 3487344 (1969-12-01), Takamura et al.
patent: 3900807 (1975-08-01), Hamada et al.
patent: 3942142 (1976-03-01), Kato et al.
patent: 3953813 (1976-04-01), Yano et al.
patent: 3982216 (1976-09-01), Mitsuhashi et al.

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