Optical counting device

Details Optical counting device Optical counting device

1974-12-26

1976-06-22

Wise, Edward J.

Registers

Transfer mechanism

Traveling pawl

234 92DM, 3401725, G06F 305, G01C 500

Patent

active

039653404

ABSTRACT:
The apparatus of this invention relates to an optical counting apparatus which is to be employed in combination with an electronic handheld calculator. The structure of this invention greatly expands the use of the handheld calculator by permitting such to be employed as a measuring device and a unit counter. An optical device is activated by the difference between transmission of light and darkness. This activation is used as a counting apparatus or a measurer of distances with the accumulated count or the distance measure to be read on the dislay unit of the calculator.

REFERENCES:
patent: 3253153 (1966-05-01), Stoddard
patent: 3600588 (1971-08-01), Sayce
patent: 3601585 (1971-08-01), Paulsen
patent: 3654449 (1972-04-01), Boyce
patent: 3675213 (1972-07-01), Spangler
patent: 3777126 (1973-12-01), Hoff
patent: 3833303 (1974-09-01), Burns et al.
patent: 3855461 (1974-12-01), Stockwell

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