US 11,727,240 B2
Self-detaching anti-theft device with energy limit
Ronald B. Easter, Parkland, FL (US); Manuel Soto, Lake Worth, FL (US); and Mohammad Mohiuddin, Boynton Beach, FL (US)
Assigned to Sensormatic Electronics, LLC, Boca Raton, FL (US)
Filed by Sensormatic Electronics, LLC, Boca Raton, FL (US)
Filed on Oct. 21, 2021, as Appl. No. 17/507,486.
Application 17/507,486 is a continuation of application No. 16/784,666, filed on Feb. 7, 2020.
Claims priority of provisional application 62/902,676, filed on Sep. 19, 2019.
Prior Publication US 2022/0044088 A1, Feb. 10, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 5/44 (2011.01); G06K 19/07 (2006.01); H04B 5/02 (2006.01)
CPC G06K 19/0723 (2013.01) [H04B 5/02 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method for operating a security tag, comprising:
inducing a voltage in a receive circuit of a security tag via a first wireless signal;
closing, by a controller of the tag, a switch thereby allowing energy to flow from the receive circuit to a mechanical component of the tag;
determining, by the controller, when an accumulated amount of energy dissipation by the mechanical component from the flowing energy exceeds a threshold value; and
opening, by the controller, the switch upon determining that the accumulated amount of energy dissipation by the mechanical component exceeds the threshold value.