Garage door position indicator

Details Garage door position indicator Garage door position indicator

1996-08-20

1998-08-25

Hofsass, Jeffery

Communications: electrical

Visual indication

Using light emitting diodes

340686, 340692, 340555, 340539, 49 31, G08B 522

Patent

active

057986819

ABSTRACT:
The garage door position indicator contains a radio frequency (RF) transmitter with an electronic angle sensor attached onto a garage door, and a RF receiver with a visual/audio indicator. The electronic angle sensor supplies signals to the RF transmitter during the changes in orientation of a garage door from vertical to horizontal and from horizontal to vertical. The RF receiver is responsive to the RF signals from the RF transmitter and controls a visual/audio indicator to indicate the position of a garage door accordingly.

REFERENCES:
patent: 3445848 (1969-05-01), Goldstein
patent: 4179690 (1979-12-01), Nicholls
patent: 4583081 (1986-04-01), Schmitz
patent: 4734680 (1988-03-01), Gehman et al.
patent: 4954810 (1990-09-01), Llewellyn
patent: 5233185 (1993-08-01), Whitaker
patent: 5313713 (1994-05-01), Heger et al.
patent: 5402105 (1995-03-01), Doyle et al.

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