Importance

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Abstract

A transmitter secured to the body of the confinee is provided with tamper detection means such as a conductive mounting strap, which if broken, sets a resettable electronic latch whose output determines the status of a tamper signal receivable by a remote station located within the confinement area. The latch is connected to a timer which serves to automatically reset the latch a first interval of time after it is initially set thereby eliminating the need for external reset equipment to carry out the reset operation. In order to avoid subterfuge, said first time interval is selected to be longer than any continuous interval of time the confinee is permitted to be absent from the confinement area. Information relating to the status of the tamper signal may also be relayed to a central monitoring station. To prevent transmission of a false tamper indication to the central station, the invention further contemplates inhibiting transmission of tamper indications to the central station in the event that less than a second interval of time, which is greater than said first interval, has elapsed since the occurrence of one or more predetermined events associated with normal operation of the system.

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First Claim