Protecting for low voltage lines, in particular for telephone ne

Details Protecting for low voltage lines, in particular for telephone ne Protecting for low voltage lines, in particular for telephone ne

1977-02-17

1979-03-27

Claffy, Kathleen H.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With longitudinally expansible solid element

1791PC, 337 34, 361119, H04Q 102

Patent

active

041467558

ABSTRACT:
Apparatus for protecting low voltage lines of a telephone system and including a jack block which may be mounted on a circuit breaker means having separable contact blades and such jack block has protecting elements including a plug with a plurality of contact studs that may be selectively inserted between the contact blades of the circuit breaker means.

REFERENCES:
patent: 3226669 (1965-12-01), Lutz
patent: 3278714 (1966-10-01), Bernutz
patent: 3462558 (1969-08-01), Selz
patent: 3518611 (1970-06-01), Shores, Jr.
patent: 3610836 (1971-10-01), Kimura et al.
patent: 3871728 (1975-03-01), Goodman
patent: 4017696 (1977-04-01), Falk
patent: 4017768 (1977-04-01), Valfre
patent: 4053719 (1977-10-01), Debortoli et al.

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