Low power child locator system

Details Low power child locator system Low power child locator system

1999-03-19

2000-06-13

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340539, 340574, 343702, G08B 2300

Patent

active

060754427

ABSTRACT:
The low power child locator system consists of a lightweight, low power radio frequency transmitter beacon worn by the child and a radio frequency directional receiver that can be used to direct the user to the radio frequency beacon transmitter. The transmitter can be programmed to generate a unique signal to prevent its output radio signal from being received by another receiver. The transmitter-receiver pair therefore communicates to the exclusion of other transmitters and receivers that are operational in the vicinity of the transmitter-receiver pair. Since the child is assumed to not have traveled a great distance from their original location, the radio frequency directional receiver operates as a simple signal strength indicator, using a plurality of narrow beam antennas to enable the user to vector in on the transmitted signal. Each of the plurality of directional antennas is capable of receiving radio signals of predetermined characteristics exclusively from a narrowly defined region of space which is located proximate to the ground and radially extending outward from the directional antenna. A plurality of indicators, each associated with at least one of the plurality of directional antennas and capable of a variable range of illumination magnitude are used in conjunction with a signal strength detector. The signal strength detector activates the plurality of indicators as a function of the identified strength of the radio signals received from each of the associated plurality of directional antennas to thereby indicate the direction from which the radio signals emanate.

REFERENCES:
patent: 4961575 (1990-10-01), Perry
patent: 5170172 (1992-12-01), Weinstein
patent: 5289163 (1994-02-01), Perez et al.
patent: 5365219 (1994-11-01), Wong et al.
patent: 5525967 (1996-06-01), Azizi et al.
patent: 5652569 (1997-07-01), Gerstenberger et al.
patent: 5771001 (1998-06-01), Cobb
patent: 5790022 (1998-08-01), Delvecchio et al.
patent: 5877675 (1999-03-01), Rebstock et al.
patent: 5900817 (1999-05-01), Olmassakian

Affiliated with

Also associated with

Rating

Low power child locator system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low power child locator system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low power child locator system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2071963