Control system for irrigation pumps

Pumps – Condition responsive control of pump drive motor – Having timer or delay means

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Details

137 78, 137392, 417 33, 417 34, 417 36, F04B 4906

Patent

active

041303822

ABSTRACT:
A rain activated control system which shuts off an irrigation pump when a predetermined amount of rainfall occurs. A receptacle for catching rain is mounted in a manner to provide adjustment of the distance between its bottom and a pair of electrodes which extend into the receptacle. When rain is collected in the receptacle in sufficient quantity to immerse the electrodes, a control circuit is completed to operate a relay. The energized relay then activates the shut down system of the engine or motor which drives the irrigation pump. Ater a time delay sufficient to assure complete shut down of the pump, a timing circuit causes deenergization of the relay and closes a reset circuit. When the irrigation pump is to be restarted, the rain receptacle is emptied and a reset switch is opened to reset the control circuitry.

REFERENCES:
patent: 1570784 (1926-01-01), Schmidt
patent: 2550093 (1951-04-01), Smith
patent: 2741986 (1956-04-01), Smith
patent: 3118606 (1964-01-01), Rotunda
patent: 3140720 (1964-07-01), Griswold
patent: 3223041 (1965-12-01), Quinn
patent: 3282217 (1966-11-01), Slover et al.
patent: 3361356 (1968-01-01), Johnson et al.
patent: 3500844 (1970-03-01), Sanner
patent: 3598144 (1971-08-01), Hodgson

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