Garage door alarm

Details Garage door alarm Garage door alarm

1999-04-12

2000-01-04

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

3406861, 340539, 49 31, G08B 1308

Patent

active

060114681

ABSTRACT:
The invention provides a garage door opener alarm for a vehicle that is only triggered when the garage door is open and the vehicle is closer to the garage than a first distance, but further from the garage than a second distance. The invention uses a transmitter system connected to a sensor, where the transmitter system works in conjunction with a first receiver with a first effective range and a second receiver with a second effective range, which senses whether or not the garage door is open. The first receiver and second receiver are mounted in the vehicle. An alarm is sounded only if one receiver receives a signal while the other receiver does not receive a signal.

REFERENCES:
patent: 4463292 (1984-07-01), Engelmann
patent: 5247232 (1993-09-01), Lin
patent: 5565843 (1996-10-01), Meyvis
patent: 5689236 (1997-11-01), Kister
patent: 5841352 (1998-11-01), Prakash
patent: 5883579 (1999-03-01), Schreiner et al.

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