Burglarproof device

Details Burglarproof device Burglarproof device

1990-03-05

1991-11-26

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

250215, 340522, 340568, G08B 1324

Patent

active

050686437

ABSTRACT:
A theft prevention device includes an optical sensor for detecting a level of ambient light and a vibration sensor for detecting a vibration of a protected article. The theft prevention device further includes an alarm circuit operatively coupled to the optical sensor and the vibration sensor for providing an alarm when the optical sensor detects a change in the level of ambient light from relative brightness to relative darkness and the vibration sensor detects a vibration of the protected article. The theft prevention device may further include a disconnection sensor for detecting a disconnection of a member attached to the protected article, whereby the alarm circuit activates the alarm upon such disconnection. The theft prevention device may further include a microswitch which is automatically activated upon removal of the protected article from an article casing. Still furthermore, the theft prevention device may include devices located at an exit of a place in which the protected article is located for emitting a high frequency light which may be detected by the optical sensor.

REFERENCES:
patent: 3836901 (1974-09-01), Matto et al.
patent: 3930249 (1975-12-01), Steck et al.
patent: 4316181 (1982-02-01), Primont et al.
patent: 4558307 (1985-12-01), Lienart van Lidt de Jeude
patent: 4833456 (1989-05-01), Heller

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2388296