Automatic control of the moisture content of the soil
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United States of America Patent
Stats
-
Mar 25, 1980
Issued Date -
N/A
app pub date -
Nov 29, 1978
filing date -
Nov 11, 1976
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The moisture content of the soil in each of a number of areas is maintained between predetermined wet and dry thresholds by a control having circuits operative in response to detected thresholds through contacts inserted in the soil to effect the opening and closing of a valve in the conduit by which water is delivered to that area. Typically a number of conduits are connected directly or through junctions to a common water supply and where that supply is pump controlled, the control for each conduit includes circuitry that enables a switch in the pump motor circuit to be closed whenever the valve operated by that control is open.
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International Classification(s)
Cited Art Landscape
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