Position detector with two timing disks rotating at different sp

Details Position detector with two timing disks rotating at different sp Position detector with two timing disks rotating at different sp

1979-01-23

1981-01-20

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340347P, G01D 534

Patent

active

042464781

ABSTRACT:
A position detector has first and second timing disks, each having at least one light-transmissive portion.
The second timing disk is rotated at a predetermined speed ratio with respect to the first timing disk. A timing sensor is disposed in close proximity to the outer circumference of the first and second timing disks to provide a timing signal when both the light-transmissive portions of the first and second timing disks rotating at predetermined speeds simultaneously pass by the position of the timing sensor.

REFERENCES:
patent: 3419727 (1968-12-01), Pabst
patent: 3525094 (1970-08-01), Leonard
patent: 3588887 (1971-06-01), Landy

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