Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1986-06-30
1988-03-01
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361111, 174 78, H02H 104
Patent
active
047290544
ABSTRACT:
A low voltage buried wire isolator for interrupting the metallic path between the common grounding system in a structure and the positive grounding system of the telephone or television cable grounding systems. The isolator comprises a housing having an electrically conductive clamping assembly clamped to the metal ground sheath of the service cable. A high voltage protector such as a gas tube is electrically connected, at one of its ends, to the clamping assembly and is designed to normally prevent the flow of electrical current therethrough which is below a predetermined value. A metal fitting is connected to the other end of the high voltage protector and is operatively electrically connected to at least a pair of signal circuit protectors also mounted within the housing. If a power crossover should occur, the high voltage protector prevents the metal ground sheath from overheating since it is electrically insulated from the cable protective apparatus. If a power surge should occur in the service wire, the signal circuit protectors within the housing prevent damage to the equipment within the dwelling.
REFERENCES:
patent: 2959633 (1960-11-01), Palmer
patent: 3033913 (1962-05-01), Dietze
patent: 3168613 (1965-02-01), Palmer
patent: 3310712 (1967-03-01), Paddock
patent: 3568128 (1971-03-01), Taylor
patent: 3851220 (1974-11-01), Charles
patent: 4009421 (1977-02-01), Splitt
patent: 4264940 (1981-04-01), Castle
Thompson Lightning Protection Inc., Technical Manual, Jul. 1969, pp. 16-18, paragraphs 47 and 60.
Pellinen A. D.
Williams H. L.
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