Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1979-09-12
1982-02-23
Salce, Patrick R.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361124, 337 32, 337 34, H02H 906
Patent
active
043171532
ABSTRACT:
A clip-on device to protect telephones and communication apparatus, wherein clips for releasably holding a 3-terminal gas protector are external extensions of electrically insulated spaced terminals within the housing. A heat coil in series with each communication line and a carbon block air gap protector across each half of the gas protector for redundancy, are within the housing. The heat coil protects against a sustained overcurrent condition on the line while the gas and air gap protectors ground over-voltages of short duration. Utilizing heat conduction means, heat generated from sustained over-voltage melts a fusible disc allowing spring biased parts within the housing to move and short line terminals to ground.
REFERENCES:
patent: 3254181 (1966-05-01), Lemieux
patent: 4034326 (1977-07-01), Hill et al.
patent: 4132915 (1979-01-01), Wilms
patent: 4150414 (1979-04-01), Pagliuca
patent: 4161762 (1979-07-01), Scheithauer
patent: 4191987 (1980-03-01), Coren
patent: 4212047 (1980-07-01), Napiorkowski
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