Light chopping disc for a pulse generator

Details Light chopping disc for a pulse generator Light chopping disc for a pulse generator

1978-06-13

1980-09-09

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, G01D 534

Patent

active

042219639

ABSTRACT:
The effect of light reflected from the inner walls of the slits in a light chopping disc is substantially eliminated by tapering the slits so that the aperture facing the light source is larger than that facing the light detector. A gear drive is also provided for increasing the number of pulses generated during each revolution of the tuning knob.

REFERENCES:
patent: 1016753 (1912-02-01), Leumann
patent: 2383321 (1945-08-01), Kleber
patent: 2437608 (1948-03-01), Long et al.
patent: 2453693 (1948-11-01), Armstrong et al.
patent: 2666650 (1954-01-01), MacDonell

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