Garage door status indicating system

Details Garage door status indicating system Garage door status indicating system

1997-08-15

1999-03-16

Tong, Nina

Communications: electrical

Condition responsive indicating system

Specific condition

340539, 340550, 340551, 340552, 340545, 340547, G08B 2100

Patent

active

058835792

ABSTRACT:
The present invention is a system which will activate an alarm when a garage door is opened. The system in a transmitter unit and a receiver unit. The transmitter unit is attached in proximity to the garage door. The receiver unit is located within a vehicle stored in the garage. The transmitter unit includes a signal generator which activates and transmits radio frequencies (RF) to the second unit. For activation, once the garage door is in an opened position, the transmitter sends a signal to the receiver. The receiver activates an alarm.

REFERENCES:
patent: 3641540 (1972-02-01), Cutler et al.
patent: 4074269 (1978-02-01), Hartley
patent: 4583081 (1986-04-01), Schmitz
patent: 4609910 (1986-09-01), Geringer et al.
patent: 5341123 (1994-08-01), Schuman, Sr. et al.
patent: 5402105 (1995-03-01), Doyle et al.
patent: 5499014 (1996-03-01), Greenwaldt
patent: 5589747 (1996-12-01), Utke
patent: 5689236 (1997-11-01), Kister

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