System for electronic safeguarding against burglary using multip

Details System for electronic safeguarding against burglary using multip System for electronic safeguarding against burglary using multip

1992-06-05

1994-12-06

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

342 27, G08B 1314

Patent

active

053714903

ABSTRACT:
A system for electronic safeguarding against burglary, or for monitoring, having a signal emitter and a receiver for receiving signals from a resonance label if the label is located in the zone of emitted signals. The system is adapted for use in stores, such as department stores, to detect unauthorized removal of items that carry a resonance label. The receiver evaluates the received signals to trigger an alarm signal upon detection by a receiver of a signal from a resonance label. Plural emitter-signal pairs are provided in which the respective emitter signals are wobbled at staggered frequencies within a broad frequency band. The emitter is also operative to emit and inoperative not to emit periodically only during alternating time phases and the receiver evaluates signals received by it for triggering the alarm only during the intervals between the signal emitting state of the emitter.

REFERENCES:
patent: 4531117 (1985-07-01), Nourse et al.
patent: 4667185 (1987-05-01), Nourse et al.

Affiliated with

Also associated with

Rating

System for electronic safeguarding against burglary using multip does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for electronic safeguarding against burglary using multip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for electronic safeguarding against burglary using multip will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-217358