Alert condition system usable for personnel monitoring

Details Alert condition system usable for personnel monitoring Alert condition system usable for personnel monitoring

1991-10-04

1993-12-07

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

340522, 340545, 340567, 340666, G08B 1300

Patent

active

052686701

ABSTRACT:
To generate an alert signal indicating that an unauthorized subject is in a first region within seven feet of a passageway, a radio transmitter is worn by the subject and received by a receiver at the passageway. A second signal is generated upon satisfaction of a second condition, such as an open door at the passageway, which second signal indicates the likelihood of the subject passing through the passageway. A first display indicates if the first signal is present and a second signal if the second condition occurs.

REFERENCES:
patent: 4095214 (1978-06-01), Minasy
patent: 4410884 (1983-10-01), Heiland
patent: 4642612 (1987-02-01), Crump
patent: 4682155 (1987-07-01), Shirley

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