Variable distance marker

Details Variable distance marker Variable distance marker

1994-07-01

1996-07-02

Peng, John K.

Communications: electrical

Systems

340287, 340323R, 340307, 473150, G08C 2100

Patent

active

055326773

ABSTRACT:
A variable distance marker system includes a display mounted in a housing and attached to electronics circuits having a light detector for receiving externally generated light signals. A rechargeable battery and a solar cell array are interconnected for supplying power to the display and circuits. An antenna is mounted in the housing for receiving RF signals and a remote RF transmitter is controllable to transmit an actuating signal to the antenna for altering the display. A remote hand-held light generator is controllable to generate a beam of light onto the light detector for controlling the digits displayed.

REFERENCES:
patent: 3665494 (1972-05-01), Baumoel
patent: 3868692 (1975-02-01), Woodard et al.
patent: 3898437 (1975-08-01), Butler
patent: 4367526 (1983-01-01), McGeary et al.
patent: 4419655 (1983-12-01), May
patent: 4532712 (1985-08-01), Vistain
patent: 4880232 (1989-11-01), Lang
patent: 4910677 (1990-03-01), Remedio et al.
patent: 5046839 (1991-09-01), Krangle
patent: 5095430 (1992-03-01), Bontio et al.
patent: 5214679 (1993-05-01), Metcalf
patent: 5298904 (1994-03-01), Olich

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