Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1991-02-27
1992-11-24
Stephan, Steven L.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361124, 361129, 361130, H02H 300
Patent
active
051668556
ABSTRACT:
The surge protector includes a device for connecting a transmission line to ground in the event of excess voltage or current, to protect communications equipment. A thermal sensitive element, located proximate the device, provides an independent, permanent path to ground, before the device can heat to a level where it may fail in the open circuit state. The element is a grounded conductive rod of nickel-titanium alloy which has a configuration memory. The rod normally has an arcuate configuration with a portion spaced from the transmission line contact associated with the device. It will assume a straight configuration, connecting the transmission line contact to ground, if the device overheats. Thermal failsafe protection for protective devices associated with ring and tip conductors, respectively, can be provided with a single thermal sensitive element.
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patent: 4538201 (1985-08-01), Wuyts et al.
patent: 4856060 (1989-08-01), Meyerhoefer et al.
patent: 4944003 (1990-07-01), Meyerhoefer et al.
patent: 4958253 (1990-09-01), Gilberts et al.
patent: 5001446 (1991-03-01), Tsuji et al.
Dougherty Thomas M.
Semitron Industries Ltd.
Stephan Steven L.
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