Movement monitor

Details Movement monitor Movement monitor

1983-05-09

1986-07-01

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

34082531, G08B 2300

Patent

active

045982759

ABSTRACT:
A proximity monitoring system for individually identifying an object or person, and having a central information processor, and a signal receiver, several remote detectors in various locations at a distance from the information processor, each having a first transmitter for communicating with such processor and having a second transmitter and a receiver, and several individual personalized portable identifiers, each identifier having a continuously activated receiver, a signal transmitter which is normally de-activated, a battery pack, and a switch operated by the receiver in response to a signal from a detector, to switch the battery on to activate the transmitter, for emitting a personalized coded identification signal.

REFERENCES:
patent: 3772668 (1973-11-01), Smith
patent: 4347501 (1982-08-01), Akerberg
patent: 4358756 (1982-11-01), Morel et al.

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