Monitoring arrangement

Details Monitoring arrangement Monitoring arrangement

1985-02-27

1986-12-30

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340307, 34030915, 455 95, G08B 108, H04Q 700

Patent

active

046332316

ABSTRACT:
Apparatus for monitoring the time duration in which a visitor remains in a defined region on the way from a visited place to another place, more particularly from the entry to the visited place and back, freely and without supervision. At the entry place, the visitor receives a transmitter with a timing member. After termination of a given time duration which corresponds to the normal travelling time of the visitor between the visited places, the transmitter transmits an individual identification signal which is received by a central receiver and is decoded. It can be immediately ascertained which visitor dwells for too long a time within the defined region so that searching or controlling measures can be initiated.

REFERENCES:
patent: 3763488 (1973-10-01), Klasing
patent: 4157540 (1979-06-01), Oros
patent: 4331953 (1982-05-01), Blevins et al.

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