Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1979-04-06
1980-11-11
Moose, Jr., Harry E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361127, H02H 322
Patent
active
042336414
ABSTRACT:
A line protector for a communications circuit comprises an insulating base having a ground pin and two pairs of line pins, one pair for each side of the line, projecting through the base. Each pair of line pins has a contact electrically connected thereto and projecting away from the base. The ground pin also has a contact projecting away from the base and spaced from the line pin contacts. A metal oxide varistor having opposed faces provides surge voltage protection for each side of the line. The line pin contacts are bonded to one face of the varistor while the ground pin contact is bonded to the other face of the varistor. Electrically conductive spring clips span the varistor and are pressed toward its opposite faces and in electrical contact with the ground pin contact. An insulating sheet is interposed between the clips and the line pin contacts to prevent one or more of the clips from grounding the line except in such surge condition that heats the varistor sufficiently to melt the insulation.
REFERENCES:
patent: 3764854 (1973-10-01), Craddock
patent: 3934175 (1976-01-01), Clark
patent: 3975664 (1976-08-01), Baumbach
patent: 4015228 (1977-03-01), Eda et al.
patent: 4092694 (1978-05-01), Stetson
patent: 4150414 (1979-04-01), Pagliuca
Moose Jr. Harry E.
Reliable Electric Company
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