Remote sensor and method for detecting the on/off status of an a

Details Remote sensor and method for detecting the on/off status of an a Remote sensor and method for detecting the on/off status of an a

1994-06-21

1996-04-09

Swarthout, Brent A.

Communications: electrical

Condition responsive indicating system

Specific condition

340654, 340635, 340652, 324415, G08B 2100

Patent

active

055065732

ABSTRACT:
A method for sensing the on/off status condition of a power switch in an appliance includes applying a series of alternating current (AC) voltage pulses to an appliance with an on/off switch that are synchronized to a source of AC power, sensing the presence of any series of AC current pulses that result if said appliance switch is closed, analyzing any AC current pulses detected in the step of sensing to determine if they resulted from the application of the AC voltage in the step of applying, and outputting an on/off status indication for the appliance switch.

REFERENCES:
patent: 3815110 (1974-06-01), Davidson
patent: 4864285 (1989-09-01), Rodden
patent: 5136280 (1992-08-01), Heggli

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