Appliance/refrigerator power controller

Details Appliance/refrigerator power controller Appliance/refrigerator power controller

1987-11-16

1988-08-09

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

3071414, H01H 3500, H01H 334

Patent

active

047630159

ABSTRACT:
A power controller having first and second power outlets, connections between one side of an A.C. line to one side of each outlet, a current sensing impedance connected between the other side of the A.C. line and the other side of the first power outlet, a triac connected between the other side of said A.C. line and the other side of the second power outlet, a first operational amplifier normally maintaining said triac in a conductive condition and a second operational amplifier for preventing current from flowing through said triac to said second power outlet while an appliance coupled to said first power outlet draws a given amount of current through said sensing impedance and for a given time said appliance stops drawing said given amount of current through said impedance.

REFERENCES:
patent: 3600635 (1971-08-01), Neilson
patent: 4204149 (1980-05-01), Cleary et al.
patent: 4217616 (1980-08-01), Jessup
patent: 4382192 (1983-05-01), Mendelson

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