Irrigation controller having means for watering after failure in

Details Irrigation controller having means for watering after failure in Irrigation controller having means for watering after failure in

1989-07-10

1990-08-21

MacDonald, Allen

Boots, shoes, and leggings

364144, 364145, 364146, 239 69, G06F 1546, G05D 706

Patent

active

049512048

ABSTRACT:
An irrigation controller having means for insuring watering, even after a failure in its primary and back-up power supplies. During a failure in the primary supply, the back-up supply is examined to determine whether it, as well, suffered a failure. If it did not, watering takes place in accordance with a programmed watering schedule following resumption of the primary supply. If it did, one or more watering stations are activated at pre-determined intervals for a pre-determined period of time following resumption of the primary supply.

REFERENCES:
patent: 4117317 (1978-09-01), Dooley, Jr. et al.
patent: 4165532 (1979-08-01), Kendall et al.
patent: 4176395 (1979-11-01), Evelyn-Veere et al.
patent: 4455614 (1984-06-01), Martz et al.
patent: 4569020 (1986-02-01), Snoddy et al.
patent: 4646224 (1987-02-01), Ransburg et al.

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