Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1995-11-15
1997-01-07
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307 40, 307 42, 307112, 307131, 307139, 307140, 307142, 335172, 200 5102, 340500, 340540, H01H 7124
Patent
active
055920322
ABSTRACT:
A security electrical interrupt device for preventing unauthorized usage of an electrical appliance such as an electric stove, while retaining operation of auxiliary electrical equipment such as the lights and an electrical clock. The device comprises a relay controlled by a micro-processor based programmable controller which measures the amount of electrical supply current being drawn by the appliance. A software computer program stored in the microcontroller commands the relay to disconnect the supply power if any person attempts to operate any part of the appliance which draws electrical current exceeding a preset limit while the controller is in the interrupt mode. In a preferred embodiment the microcontroller is programmed to enter the interrupt mode by 1) key sequences entered on a detachable key pad, 2) when a selected amount of time has elapsed since the last authorized usage, or 3) by removal of the detachable key pad. The microcontroller restores full supply power to the appliance by key sequences entered on the key pad.
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Keizer Daniel J.
Lax Steven A.
Muylwyk Robert K.
Eisen Mark B.
Keizer Daniel J.
Lax Steven A.
Paladini Albert W.
Shoop Jr. William M.
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