Garage door position indicating system

Details Garage door position indicating system Garage door position indicating system

1994-04-18

1995-03-28

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340545, 340686, 340689, 340546, 49 31, G08B 108

Patent

active

054021057

ABSTRACT:
A garage door position indicating system includes a tilt switch attached to a garage door, an RF transmitter coupled to the tilt switch, an RF receiver, and an indicator controlled by the RF receiver. The tilt switch supplies an enable signal to the RF transmitter at selected first tilt positions and blocks the enable signal at selected second tilt positions. The RF transmitter generates an RF signal in response to the enable signal. The RF receiver is responsive to the RF signal and controls an indicator to indicate the position of the garage door.

REFERENCES:
patent: 3611333 (1971-10-01), Conigliaro
patent: 3827038 (1974-07-01), Willis
patent: 3831158 (1974-08-01), Rempel et al.
patent: 4074269 (1978-02-01), Hartley
patent: 4090182 (1978-05-01), Young
patent: 4124847 (1978-11-01), Cashman
patent: 4536751 (1985-08-01), Shigemitsu et al.
patent: 4583081 (1986-04-01), Schmitz
patent: 4819379 (1989-04-01), Kenzelmann et al.
patent: 4868543 (1989-09-01), Binkley
patent: 4954810 (1990-09-01), Llewellyn

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