Grounding arrangement for microelectronic sprinkler control

Details Grounding arrangement for microelectronic sprinkler control Grounding arrangement for microelectronic sprinkler control

1978-06-15

1980-07-29

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361191, H01H 4300

Patent

active

042153824

ABSTRACT:
A grounding arrangement is disclosed for microelectronic control of operating devices such as solenoid operated sprinkler valves in an a-c sprinkler system wherein one a-c power line connecting the several valve solenoids is earth-grounded and d-c microelectronic control circuits use the voltage level of the non-grounded a-c power line as a common voltage reference to operate switch means which interruptively supply a-c power to the valve solenoids.

REFERENCES:
patent: 3201754 (1965-08-01), Reiner et al.
patent: 3688130 (1972-08-01), Granieri
patent: 3723827 (1973-03-01), Griswold et al.
patent: 4011927 (1977-03-01), Smith
patent: 4145617 (1979-03-01), Lee et al.

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