Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-07-25
1996-04-30
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specific condition
340539, 340572, 359155, 455100, G08B 2300
Patent
active
055128793
ABSTRACT:
A miniature electronic security tag is affixed to the ankle of a newborn infant. The tag contains an RF transmitter and digital encoding circuit. On a periodic basis, the tag transmits a unique encoded identity signal to receivers strategically placed within the hospital. The tag is attached to the infant with a security element having a plurality of conductors which form a plurality of complete electrical circuits while the tag is in place. Attempts to remove the tag by cutting or stretching the security element are detected by the encoder circuit, causing a change in the digital code which is transmitted. Receivers are interconnected to a central monitoring computer which continuously determines the identity and location of each infant. In the event an unauthorized person attempts to leave the hospital with an infant, or if the tag is removed, an alarm is sounded.
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patent: 3478344 (1969-11-01), Schwitzgebel et al.
patent: 4673923 (1987-06-01), Boscoe et al.
patent: 4952928 (1990-08-01), Carroll et al.
patent: 5032823 (1991-07-01), Bower et al.
patent: 5062151 (1991-10-01), Shipley
patent: 5218344 (1993-06-01), Ricketts
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