Gas tube fail safe device for telephone protector modules

Details Gas tube fail safe device for telephone protector modules Gas tube fail safe device for telephone protector modules

1990-02-12

1991-06-25

Broome, H.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Space discharge device

361124, 361129, H01H 3900, H02H 724

Patent

active

050271008

ABSTRACT:
A gas tube fail safe device for use in individual subscriber circuit telephone mmodules and related equipment, in which a fusible element is adapted to by-pass the conductive function of the gas tube in the event of gas tube failure. In one embodiment the construction provides for the fusing of the fusible element upon the occurrence of a sustained current overload. In another embodiment, this operation is supplemented by provision of secondary air gap means operative upon the occurrence of momentary excess voltage surges in the presence of a defective gas tube.

REFERENCES:
patent: 4573100 (1986-02-01), Fasano
patent: 4910489 (1990-03-01), Neuwirth
patent: 4912592 (1990-03-01), Flindall et al.

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