Fluid sprinkling – spraying – and diffusing – With cutoff or flow varying means operated by means... – With overriding second control means
Patent
1990-01-11
1991-10-29
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
With cutoff or flow varying means operated by means...
With overriding second control means
239 69, 239 70, 239 71, 137 783, A01G 2516
Patent
active
050608592
ABSTRACT:
An improved irrigation control apparatus for use in controlling an irrigation valve. The apparatus includes a soil moisture sensor for generating an output signal indicative of the soil moisture level. The output signal is sent to a control unit that inhibits valve operation if the soil is considered wet. The control unit has a control circuit that applies a relatively short duration power pulse to the sensor to obtain a moisture reading during the pulse. In addition, the control unit includes display lights which are part of a manually actuable test circuit that displays a wet or dry soil indication received from the sensor.
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Landscape & Irrigation, Oct. 1987, pp. 102 and 105.
Landscape & Irrigation, Oct. 1987, pp. 79 and 82-83.
Landscape & Irrigation, Oct. 1987, pp. 94, 95, 98 and unknown pg. (cont. from p. 98).
Sunset, May 1988, pp. 270 and 271.
Grant William
Kashnikow Andres
Miller James W.
The Toro Company
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