Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1997-10-30
1998-11-10
Hofsass, Jeffrey A.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340571, 340574, G08B 108
Patent
active
058350136
ABSTRACT:
A baggage proximity monitor is provided including a portable user housing adapted to be carried by a user and a baggage housing including a mounting mechanism for releasably mounting to an article of baggage. Next provided is a user circuit including a transmitter adapted to continuously transmit an activation signal of a predetermined magnitude and at a predetermined frequency only upon the actuation thereof and a switch situated on the housing and connected to the transmitter. The switch has a first orientation for actuating the transmitter and second orientation for precluding the actuation thereof. Also included is baggage circuit including a receiver mechanism for receiving the activation signal only at the predetermined frequency via free space, a comparator mechanism connected to the receiver mechanism and adapted to transmit the activation signal only upon a magnitude of the activation signal being below a predetermined amount, and an audio mechanism connected to the comparator mechanism for emitting an audio when the activation signal is received.
REFERENCES:
patent: 4591835 (1986-05-01), Sharp
patent: 4808943 (1989-02-01), Soleimani
patent: 5001460 (1991-03-01), Basson
patent: 5043702 (1991-08-01), Kuo
patent: 5223815 (1993-06-01), Rosenthal et al.
patent: 5530426 (1996-06-01), Milk
patent: 5652569 (1997-07-01), Gerstenberger et al.
Hofsass Jeffrey A.
Trieu Van T.
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