Fluid handling – Systems – Programmer or timer
Patent
1993-01-15
1994-02-22
Michalsky, Gerald A.
Fluid handling
Systems
Programmer or timer
239 70, G05B 1101
Patent
active
052878880
ABSTRACT:
A device for expanding the number of stations controlled by an existing irrigation controller or the like, or which can be operated as a stand-alone irrigation controller. The device (10) includes a control processor (12) which sequentially activates one or more control lines (66) for a predetermined period of time, the time periods being independently set for each control line. The timing cycle of the device (10) can be initiated manually or from a station control line (60) of an existing master controller (50). Activation by a master controller occurs after the station control line to which the device is connected completes its timed cycle according to the master controller. One or more of the devices can be cascaded to provide unlimited expansion capability.
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Advertisement from Landscape and Irrigation Magazine; "Switch-Hitter"; May 1988.
Irrigation Maintenance Bulletin-National Irrigation Specialists; "Switch-Hitter"; date of publication unknown.
Michalsky Gerald A.
O'Banion John P.
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