Tamper-proof device for detecting opening and closing of a secur

Details Tamper-proof device for detecting opening and closing of a secur Tamper-proof device for detecting opening and closing of a secur

1991-02-25

1992-05-05

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340550, 340556, G08B 1312

Patent

active

051111845

ABSTRACT:
A tamper-proof device for detecting opening and closing events of a secure container is characterized by a fiber optic cable having a first portion connected with a fixed member of the container and a second portion connected with a movable locking member of the container so that the cable is bent or flexed when the container locking member is moved between open and closed positions. Light pulses are transmitted through the cable and variations in the pulses resulting from bending of the cable are detected to indicate opening and closing of the container.

REFERENCES:
patent: 3854792 (1974-12-01), Koelle
patent: 4292628 (1981-09-01), Sadler
patent: 4358678 (1982-11-01), Lawrence
patent: 4729626 (1988-03-01), Stieff
patent: 4729630 (1988-03-01), Martinez

Affiliated with

Also associated with

Rating

Tamper-proof device for detecting opening and closing of a secur does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tamper-proof device for detecting opening and closing of a secur, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tamper-proof device for detecting opening and closing of a secur will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1415702