Fluid handling – Ambient condition change responsive – For controlling soil irrigation
Patent
1980-01-04
1982-06-08
Chambers, A. Michael
Fluid handling
Ambient condition change responsive
For controlling soil irrigation
137 80, 13762411, 239 64, 239 70, 307118, 361175, 361178, A01G 2516
Patent
active
043334903
ABSTRACT:
An apparatus for automatically controlling a watering system in response to a comparison of an ambient condition with a time-varying reference level having an adjustable maximum value is disclosed. The invention includes an electrical circuit for monitoring and sensing the magnitude of the ambient condition and for converting the sensed magnitude into a proportional electrical signal. The invention further includes a first timer circuit for generating a triggering signal when the time-varying reference level exceeds the magnitude of the proportional electrical signal. This triggering signal is applied to a second timer circuit which actuates the watering system for a predetermined period of time in response to the triggering signal. Furthermore, the present invention includes a disabling circuit which compares the proportional electrical signal with a predetermined cut-off level and prevents the first timer circuit from generating the triggering signal whenever the magnitude of the proportional electrical signal passes the cut-off level. The present invention further includes a plurality of controls by which the time periods of the first timer and second timer circuits may be adjusted. Also, there are controls whereby predetermined reference levels can be established so that the apparatus is in a lock-out condition whenever the reference levels are passed.
REFERENCES:
patent: 3590335 (1971-06-01), Tetar
patent: 3951339 (1976-04-01), Du Fresne
patent: 3991375 (1976-11-01), Riggs et al.
patent: 3991939 (1976-11-01), Maclay
patent: 4014359 (1977-03-01), Sanner
patent: 4023585 (1977-05-01), VandenBurg
patent: 4114647 (1978-09-01), Sturman et al.
patent: 4176395 (1979-11-01), Evelyn-Veere et al.
patent: 4190884 (1980-02-01), Medina
patent: 4197886 (1980-04-01), Neal
patent: 4232707 (1980-11-01), Sturman et al.
patent: 4256133 (1981-03-01), Coward et al.
Chambers A. Michael
Gilbert III E. Harrison
Hessin Robert M.
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