Electrical transmission or interconnection systems – Plural load circuit systems – Selectively connected or controlled load circuits
Patent
1976-05-10
1977-12-06
Hohauser, Herman
Electrical transmission or interconnection systems
Plural load circuit systems
Selectively connected or controlled load circuits
331 46, H02J 314
Patent
active
040619273
ABSTRACT:
An electronic timing system for controlling a plurality of electrically controlled watering valves comprising a free running multivibrator circuit having a plurality of individually adjustable resistor-capacitor circuits for controlling the frequency. A divide-by-N counter, when filled, controls a stepping counter for successively activating different ones of the valves and, in turn, selects different ones of the resistor-capacitor circuits to control the time each of the valves is activated. Operation of the multivibrator circuit is initiated by a clock operated day-of-the-week counter having pre-settable switch means for enabling or disabling operation of the multivibrator circuit during any selected day. A repeat cycling control device is provided to selectively cause repeated cycling for different numbers of times and a delay device is provided to delay repeat cycling for different time periods.
REFERENCES:
patent: 3604943 (1971-09-01), Bayer
patent: 3723753 (1973-03-01), Davis
Hohauser Herman
Schwend Fred N.
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