Alarm device for automatic garage door

Details Alarm device for automatic garage door Alarm device for automatic garage door

1996-08-29

1998-07-14

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

340522, G08B 1308

Patent

active

057811075

ABSTRACT:
An alarm device for an automatic garage door includes a detecting circuit for producing a single negative pulse signal when a detector detects an opening motion of said garage door, an alarm controlling circuit for receiving said single negative pulse signal and producing an alarm signal, a "normal function" detecting circuit connecting to a garage door opening machine for producing a "normal opening" signal when said garage door is normally opened by said garage door opening machine, which is then changed to a "shut off alarm" signal provided to said alarm controlling circuit for preventing the production of said alarm signal, an alarm generating circuit for generating an alarm when said alarm signal is received, and a transformer circuit for providing low voltage for said alarm device. Accordingly, the alarm device for an automatic garage door can provide a warning alarm when said garage door is forced to open or damaged by bandits or burglars. However, as long as the residents operate a normal remote control or in-house switch of said garage door to open or close it, said garage door will be opened and closed as usual (with no alarm).

REFERENCES:
patent: 4074269 (1978-02-01), Hartley
patent: 4464651 (1984-08-01), Duhame
patent: 4583081 (1986-04-01), Schmitz
patent: 5402105 (1995-03-01), Doyle et al.

Affiliated with

Also associated with

Rating

Alarm device for automatic garage door does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Alarm device for automatic garage door, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alarm device for automatic garage door will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1886278