Vibration responsive door alarm

Details Vibration responsive door alarm Vibration responsive door alarm

1979-07-09

1981-08-04

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340527, 340546, G08B 1308

Patent

active

042825180

ABSTRACT:
An alarm device responsive to vibration includes a unitary housing in which is disposed an SCR for connecting an alarm signal to an associated source of power, the gate of the SCR being connected to a pendulum and ring assembly with the pendulum being normally suspended within the ring out of engagement therewith but which moves into engagement with the ring when the housing is subjected to vibration to apply power to the SCR gate so that the SCR conducts to actuate the alarm signal for indicating the application of a vibration to the housing or a supporting structure on which the housing is mounted. The alarm device may also include timing circuitry which deactivates the SCR after a predetermined period of time.

REFERENCES:
patent: 3192517 (1965-06-01), Werlin
patent: 3417297 (1968-12-01), Wallentowitz
patent: 3721956 (1973-03-01), Hamann et al.
patent: 3725890 (1973-04-01), Cirino
patent: 4035668 (1977-07-01), Minami et al.
patent: 4057791 (1977-11-01), Bimmerle et al.
patent: 4103294 (1978-07-01), Stettner et al.
patent: 4151507 (1979-04-01), Willis

Affiliated with

Also associated with

Rating

Vibration responsive door alarm does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Vibration responsive door alarm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vibration responsive door alarm will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-242710