Apparatus to prevent infant kidnappings and mixups

• US 5,512,879 A
• Filed: 07/25/1994
• Issued: 04/30/1996
• Est. Priority Date: 07/25/1994
• Status: Expired due to Fees

• Current Assignee: Wesco Incorporated (HF HOLDINGS INC)
• Original Assignee: Wesco Incorporated (HF HOLDINGS INC)
• Inventors: Stokes, John H.
• Primary Examiner(s): MULLEN, THOMAS J
• Application Number:
  US08/279,975
• Time in Patent Office: 645 Days
• Field of Search: 340/573, 340/572, 340/574, 340/506, 340/505, 340/311.1, 340/825.08, 340/825.34, 340/825.44, 340/825.49, 340/539, 343/718, 343/878, 455/100, 128/903, 359/154, 359/155
• US Class Current: 340/573.4
• CPC Class Codes: G08B 21/0288 Attachment of child unit to child/article
• CPC Class Codes: G08B 21/22 responsive to presence or absence of persons

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.

Claims

1. An electronic security tag for uniquely identifying and locating persons or articles in order to prevent their removal from a protected area comprising:

a conductive security element attachment means having two ends, whose electrical state will change when stretched, severed, partially severed or removed by parting the ends;

an encoding means for generating a unique identity code for said tag;

an alarm code generating means for determining the electrical state of said attachment means and generating an alarm code indicating said state of said attachment means;

radiant energy transmission means for transmitting said identity code and said alarm code;

an internal direct current power means operably connected to said attachment means, said encoding means, said alarm code generating means and said radiant energy transmission means; and

a power activation and deactivation means for activating said tag immediately prior to use and for permanently deactivating said tag subsequent to use.

2. An electronic security tag according to claim 1 wherein said attachment means comprises a band having two sides and two distinct ends;

one end of said band being imprinted with a plurality of conductive circuits on one side of said band and operably connected to said encoding means and the other end of said band being imprinted on the opposite side with a plurality of crosswise bridging contacts, said conductive circuits and said bridging contacts together forming a plurality of completed circuits when the ends of said band are joined by superimposing the two imprinted areas of said band.

3. An electronic security tag according to claim 2 wherein said encoding means includes a memory, and periodically generates said unique identity code including a first code portion formed by an identity code which is imprinted within the memory of said encoding means during manufacture, and a second code portion which is determined by the relative position of said plurality of conductive circuits and said plurality of crosswise bridging contacts.

4. An electronic security tag according to claim 1 wherein said alarm code generating means is operably connected to each of said security element attachment means, said encoding means, said radiant energy transmission means and said power activation and deactivation means such that any attempt to remove said tag by stretching, severing, or partially severing said security element attachment means or by parting the ends of said security element attachment means when they are affixed to one another, will change said alarm code generated by said alarm code generating means and thus will change said alarm code transmitted by said radiant energy transmission means.

5. An electronic security tag according to claim 2 wherein said radiant energy transmission means includes a radio frequency transmitter circuit comprising a modulated carrier means and an antenna means which is imprinted upon said band and which which is operably connected to said encoding means and said power activation and deactivation means.

6. An electronic security tag according to claim 1 wherein said radiant energy transmission means includes an infra red transmitter circuit comprising a modulated carrier means and an infra red light emitting means each of which are operably connected to said encoding means and said power activation and deactivation means.

7. An electronic security tag according to claim 2 wherein said security element attachment means includes an elastic portion through which said plurality of conductive circuits on one side of said band pass wherein said conductive circuits are comprised of a non elastic material such that one or more of said conductive circuits will break in the event said elastic portion of said security element is stretched.

8. An electronic security tag having a power activation and deactivation means including a single reset conductor and a single grounded conductor imprinted upon a power activation circuit area of said tag and covered with a removable conductive covering such that said tag is caused to remain in an inactive state until said conductive covering is removed at which time said tag becomes fully active, in which the application or removal of said conductive covering to said power activation circuit area of said band changes the electrical state of said single reset conductor.

9. An electronic security tag according to claim 8 wherein said removable conductive covering includes an adhesive means which will cause said removable conductive covering to remain in contact with said power activation circuit area.

10. An electronic security tag according to claim 8 in which said tag includes a conductive security element and a plurality of crosswise bridging contacts, and wherein a portion of said removable conductive covering covers two adhesive areas of said security element which, when superimposed upon one another, cause said conductive security element and said plurality of crosswise bridging contacts to come into contact with one another.

11. An electronic security tag with two ends, comprising:

a security element attachment means whose electrical state changes if said two ends are parted;

an encoding and timing means for generating an identity code for said tag;

an internal direct current power means for providing power to operate said tag;

a radiant energy transmission means for periodically transmitting said identity code at a time interval; and

a security tag self deactivation means including a plurality of conductors imprinted upon a front side of said tag, and a plurality of crosswise bridging contacts imprinted upon a back side of said tag, wherein a plurality of complete circuits are formed when the ends of said tag are superimposed upon one another, wherein said tag is deactivated by said self-deactivation means when the ends of said tag are parted or said security element attachment means is severed or stretched, causing said encoding and timing means to energize an increased energy consumption means which includes;

an RF power increasing means which increases the amount of energy radiated by said radiant energy transmission means;

a timing means which decreases the time interval between transmissions of said identity code from said radiant energy transmission means; and

an energy absorbing means which absorbs energy from said internal direct current power means.

12. An electronic security tag according to claim 11 wherein said energy absorbing means includes a resistor means, one terminal of which is operably connected to said internal direct current power means, and the other terminal of which is operably connectable to a ground potential.

13. An electronic security tag with two ends, comprising:

a security element attachment means whose electrical state changes if said two ends are parted, including an elastic portion through which are passed a plurality of non-elastic conductors printed upon a front side of said tag, and a plurality of crosswise bridging contacts imprinted upon a back side of said tag in such a fashion as to cause a plurality of completed circuits to be formed when the ends of said tag are superimposed upon one another;

an encoding and timing means for generating an identity code for said tag;

an internal direct current power means for providing power to operate said tag;

a radiant energy transmission means for transmitting said identity code; and

an energy absorbing means for draining said internal direct current power means when said tag is removed.