Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1998-04-23
2000-03-07
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
340689, 200 6145R, 200 6152, G08B 2100
Patent
active
060346140
ABSTRACT:
A multi-cell battery power pack for use in a battery-powered appliance such as a lantern or the like supports a plurality of conventional battery cells together with a seismically activated switch to provide a seismically activated apparatus. The seismic switch includes a spring rod and an elongated cylindrical rod suspending a contact weight within a contact ring such that the contact ring encircles a portion of the contact weight. A silicon controlled rectifier is operatively coupled to the contact weight and the contact ring as well as the batteries of the power pack to provide silicon controlled rectifier activation in response to sufficient seismic activity. In an alternate embodiment, a cylindrical housing is configured to correspond to a conventional battery cell and supports a positive and negative terminal at its opposed ends. Within the housing, a spring rod and elongated cylindrical rod support the contact weight within the contact ring which operate together with an associated silicon controlled rectifier to facilitate seismic response. The resulting device replaces a conventional cell within a battery power pack to convert a conventional power pack to a seismically responsive power pack. In a still further alternate embodiment, a coil spring supports the contact weight and a timer responsive to the seismic switch controls the relay.
REFERENCES:
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patent: 5633463 (1997-05-01), Szasz
Ekstrand Roy A.
Hofsass Jeffery A.
La Anh
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