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

1989-05-01

1990-03-20

Broome, H.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Space discharge device

361124, H01H 3900, H02H 724

Patent

active

049104896

ABSTRACT:
A fail-safe secondary fuse device for assuring the grounding of a conductive gas tube used in modular protection devices for individual subscriber circuit pairs. The device resiliently engages each of the three end and center electrodes normally provided on the tube. In the case of the end electrodes, the device is insulated from direct electrical communication by a fusible sleeve of insulative material which fuses under heat emanating from the gas tube with the occurrence of continued current overload.

REFERENCES:
patent: 2413887 (1947-01-01), Pittman
patent: 3023289 (1962-02-01), McAlister
patent: 3123696 (1964-03-01), McAlister
patent: 3254189 (1966-05-01), Sprow
patent: 3710297 (1973-01-01), Kawazoe
patent: 4047143 (1977-09-01), Burden et al.
patent: 4223641 (1980-11-01), Baumbach
patent: 4502689 (1977-10-01), Smith, Sr.
patent: 4717902 (1988-01-01), James

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