Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1996-07-18
1997-10-14
DeBoer, Todd E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361127, 379412, H02H 322
Patent
active
056778201
ABSTRACT:
An overvoltage protection apparatus is used with a pair of telephone or communications TIP/A and RING/B lines including voltage clamping circuitry for clamping voltage signals on the lines at a predetermined voltage potential. The voltage clamping circuitry includes a pair of voltage clamping devices connected in series between the TIP/A and RING/B lines and a third voltage clamping device connected between a junction connection of the pair of the voltage clamping devices and a ground potential connection and current limiting devices for limiting current flow in the lines. The predetermined voltage potential exceeds a primary alternating current (AC) power line peak value by a set tolerance value.
REFERENCES:
patent: 4729055 (1988-03-01), Dorival
patent: 4758920 (1988-07-01), McCartney
patent: 4907120 (1990-03-01), Kaczmarek et al.
patent: 4941063 (1990-07-01), McCartney et al.
patent: 5357568 (1994-10-01), Pelegris
patent: 5359657 (1994-10-01), Pelegris
Search report by UK Patent Office for GB Application No. GB9521750.1 dated 26 Jan. 1996.
Deboer Todd E.
Oneac Corporation
Pennington Joan
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