Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1985-12-06
1987-05-19
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
340551, G08B 1318
Patent
active
046671854
ABSTRACT:
Operation of similar electronic article surveillance (EAS) systems in proximity to each other may result in false alarms or system "shut-downs" as a result of signals transmitted from one system being detected in the receiver circuits of the other systems. This may especially occur with EAS systems in which the receivers are only activated during quiescent intervals between transmitted bursts, such that if the systems are unsychronized, the transmitted bursts of the one system may occur during the quiescent intervals of the other system. In the present invention, synchronization is effected by responding to RF detected during the quiescent intervals and preventing the transmitted bursts from occurring during the quiescent intervals of the other system.
REFERENCES:
patent: 3740742 (1973-06-01), Thompson et al.
patent: 3810172 (1974-05-01), Burpee et al.
patent: 4023167 (1977-05-01), Wahlstrom
patent: 4476459 (1984-10-01), Cooper et al.
patent: 4531117 (1985-07-01), Nourse et al.
Fergen James E.
Nourse Gary E.
Zarembo Peter J.
Barte William B.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Smith James A.
Swann III Glen R.
LandOfFree
Wireless synchronization system for electronic article surveilla does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wireless synchronization system for electronic article surveilla, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wireless synchronization system for electronic article surveilla will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1567424