Condition operated load control

Details Condition operated load control Condition operated load control

1977-10-28

1979-10-30

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328 75, 328130, 307311, 307 41, 307117, 3403094, H01H 4322, H01H 4324, H01H 4724

Patent

active

041729986

ABSTRACT:
The disclosed apparatus operates a load in one mode in response to one cyclically occurring event and in a second mode at a specified time in the cycle regardless of the phase of the one event in the cycle. According to a specific embodiment, the apparatus turns on lights at sunset and turns them off at a later nighttime hour, preferably the same hour each night. A generator stores signals in an accumulating memory at one rate during daylight hours and at a faster rate, preferably twice the daylight rate, during nighttime hours. When the memory content reaches a preset level during the night, it turns off the switch that had turned on the lights at sunset and empties itself of storage until sunrise.

REFERENCES:
patent: 3638189 (1972-01-01), Gamache et al.
patent: 3829784 (1974-08-01), Eshraghian
patent: 3999133 (1976-12-01), Lee et al.
patent: 4035661 (1977-07-01), Carlson
patent: 4048812 (1977-09-01), Thomason

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