Irrigation apparatus

Details Irrigation apparatus Irrigation apparatus

1976-09-15

1978-02-14

Cohan, Alan

Fluid handling

With casing, support, protector or static constructional...

Vehicle

239177, 239212, 335153, B05B 302

Patent

active

040733092

ABSTRACT:
Disclosed is a control system for maintaining the linear alignment of end-coupled, adjacent sections of self-propelled sprinkler irrigation apparatus, and for interrupting power to the drive means when any adjacent sections are in gross linear misalignment uncorrectable by the control system. A magnetic reed switch and permanent magnet combination, together with a metallic shield interposed between them, act as alignment sensors and overtravel sensors to open or close the reed switch in accordance with the alignment status of the irrigation system. A logic circuit utilizing an exclusive OR-gate is disclosed which causes the function of the alignment control sensors to reverse whenever the direction of the irrigation apparatus reverses, and, also, an electronic circuit utilizing a digital capacitance meter to indicate which tower is in gross linear misalignment, if any, should the apparatus automatically shut down.

REFERENCES:
patent: 3785400 (1974-01-01), Zimmerer et al.
patent: 3807436 (1974-04-01), Pringle
patent: 3823730 (1974-07-01), Sandstrom et al.
patent: 3952769 (1976-04-01), Ott

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