Quick close circuit for electric gate

Details Quick close circuit for electric gate Quick close circuit for electric gate

1991-10-17

1994-06-21

Williams, Hezron E.

Communications: electrical

Vehicle detectors

49 31, G08G 101

Patent

active

053231511

ABSTRACT:
A quick close circuit is provided for an electric powered gate having a wire loop control system comprising a gate control circuit, a wire loop in a passageway of the gate, and a loop detector circuit to sense presence of vehicles in the loop. The quick close circuit provides for the opening of the gate upon detection of a vehicle in the passageway by the loop detector circuit. After the vehicle has passed through the passageway, the quick close circuit stops further opening of the gate and commences the closing of the gate.

REFERENCES:
patent: 2801844 (1957-08-01), Cook
patent: 3368305 (1968-02-01), Piekarski
patent: 3874117 (1975-04-01), Boehm
patent: 3891900 (1975-06-01), Gallant
patent: 3975861 (1976-08-01), Baump et al.
patent: 4604826 (1986-08-01), Sorber
patent: 4614057 (1986-09-01), Sorber
patent: 4621452 (1986-11-01), Deeg

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