Fluid sprinkling – spraying – and diffusing – Processes
Patent
1978-03-10
1981-02-10
Cherry, Johnny D.
Fluid sprinkling, spraying, and diffusing
Processes
239710, 239177, 239DIG1, B05B 300
Patent
active
042496985
ABSTRACT:
A center pivot irrigation system having an elongated concuit assembly with an inner end pivotally connected to a water source at a center pivot and having a plurality of discharge nozzles at spaced intervals along its length has one or more short range and a long range end gun mounted near the outer end of the conduit for irrigating the corner areas of a rectangular or square field. The long range end gun is adjusted to have a spray pattern which extends inwardly to provide water to that area normally irrigated by the sprinklers along the outer section of conduit in addition to an area extending beyond the outer edge of the arc farther than that covered by the short range guns. By turning off sprinklers along a section of conduit, water is diverted to help provide a sufficient pressure and flow rate as is necessary for efficient operation of the long range end gun.
The end guns are sequenced on and off by a control system using only one wire to transmit control signals to operate two different ranges of end guns. A switch and diode arrangement produces a series of positive going pulses for one range end gun and a series of negative going pulses for a second range end gun. The pulses are sensed by a latch relay circuit in combination with a second relay which senses the presence of either type of pulse to operate the solenoids controlling the flow of water to the end guns and sprinklers which are sequenced.
REFERENCES:
patent: 3352493 (1967-11-01), Curtis
patent: 3979062 (1976-09-01), Christensen et al.
patent: 4011990 (1977-03-01), Meis et al.
patent: 4161292 (1979-07-01), Holloway et al.
Scrutchfield Donald H.
Smith Neil C.
Cherry Johnny D.
Forman Michael J.
Valmont Industries, Inc.
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