Fluid sprinkling – spraying – and diffusing – With cutoff or flow varying means operated by means... – With overriding second control means
Patent
1975-10-06
1976-06-08
Ward, Jr., Robert S.
Fluid sprinkling, spraying, and diffusing
With cutoff or flow varying means operated by means...
With overriding second control means
239542, 73 73, 324 65R, 340235, 340239S, A01G 2516, A01G 2700
Patent
active
039617530
ABSTRACT:
An irrigation system controller that operationally ties the dispensing of water to the soil directly to the need thereof without requiring continuous monitoring by the irrigation manager. If a preselected water supply period is not sufficient to attain a desired moisture content in the soil due either to an insufficient estimate on the part of the manager or a power or equipment failure or unforeseen change in weather, a warning device or other electrically-operated signal calls attention to the need for the selection of a new longer water supply period or a correction of the power or equipment failure. A pushbutton switch resets the warning system. If the preselected water supply period is sufficient to maintain the desired moisture content, a feed-back loop automatically controls the dispensation of water to maintain the desired moisture content of the soil.
REFERENCES:
patent: 2611643 (1952-09-01), Higgins
patent: 2621233 (1952-12-01), Spalding
patent: 2878671 (1959-03-01), Prosser et al.
patent: 2911156 (1959-11-01), Freeman
patent: 2985827 (1961-05-01), Hasenkamp
patent: 3024372 (1962-03-01), Seele
patent: 3118606 (1964-01-01), Rotunda
patent: 3771548 (1973-11-01), Rauchwerger
patent: 3843056 (1974-10-01), Nye
patent: 3859594 (1975-01-01), Grindheim
International Electric Co.
Ward, Jr. Robert S.
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