Impedance sensing anti-theft device

Details Impedance sensing anti-theft device Impedance sensing anti-theft device

1985-06-07

1987-04-14

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340572, 340693, G08B 1322, G08B 1314

Patent

active

046582428

ABSTRACT:
Theft of electrical appliances and the like is deterred by an alarm (40) which is activated when the appliance is disconnected from an impedance sensing alarm apparatus (10). A signal of a first magnitude is presented at an input of a detector (26) when the appliance is connected to the alarm apparatus. A signal of a second magnitude is presented at the input of the detector (26) when the appliance is disconnected from the alarm apparatus. The different magnitude of the signals is sensed by the detector (26) which, in turn, generates a control signal that activates an audible alarm (40) or the like.

REFERENCES:
patent: 3230519 (1966-01-01), Metz et al.
patent: 3544984 (1970-12-01), Hanson
patent: 3553674 (1971-01-01), Head
patent: 4028691 (1977-06-01), Zeder
patent: 4293852 (1981-10-01), Rogers
patent: 4319228 (1982-03-01), Daniels

Affiliated with

Also associated with

Rating

Impedance sensing anti-theft 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 Impedance sensing anti-theft device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impedance sensing anti-theft device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1788826