Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1991-01-18
1992-03-24
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
340505, 340541, 340551, 340693, 34082569, G08B 1314
Patent
active
050992260
ABSTRACT:
An intelligent security system capable of sensing the presence of an object to be identified, interrogating the object with an encrypted code, and receiving and processing an encoded response from a passive transceiver carried by the object so that the intelligent security system can be utilized for controlling access to a location, performing inventory control, controlling toll access systems, operating multi-station complex machinery systems, or providing object locating information, for example. The intelligent security system is particularly characterized by its utilization of a totally passive transceiver including a transmit circuit which will only be activated upon receipt by the transceiver of a predetermined encrypted interrogation signal. In response to receipt of a proper interrogation signal, an encoded response signal is transmitted by the passive transceiver and then received, decoded and processed by other elements of the security system.
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Interamerican Industrial Company
Mullen Jr. Thomas J.
Swann III Glen R.
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