Photoelectric line measuring device with digital display

Details Photoelectric line measuring device with digital display Photoelectric line measuring device with digital display

1993-03-05

1994-02-15

Messinger, Michael

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

33719, 33756, 33763, G01D 534, G01B 310

Patent

active

052869725

ABSTRACT:
A distance measuring device measures distance by optically measuring the length of a flexible member, such as a line, as it is left off a reel. The line is provided with a plurality of dye marks spaced at predetermined increments. The dye marks are detected by an optical sensor. The optical sensor is operatively connected to a circuit which maintains a count indicative of the length of the line. The count is displayed on an LED display.

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patent: 4765063 (1988-08-01), Sing
patent: 4922176 (1990-05-01), Kim
patent: 4974164 (1990-11-01), Lewis et al.

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