Optical master controller having plural tracks each with plural

Details Optical master controller having plural tracks each with plural Optical master controller having plural tracks each with plural

1987-11-16

1989-01-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250229, G01D 534

Patent

active

047959029

ABSTRACT:
An optical controller device employing a single rotatable light blocking plate on opposite sides of which are mounted light emitting and light receiving elements. A pattern of openings or transparent areas arcuately arranged on different circumferences of the light blocking plate determine the passage or interruption of light and thus provide output signals according to the position of rotation of an operator's handle connected to the light blocking plate. The light emitting and receiving elements are mounted on support plates configured so that a first group of the light emitting and receiving elements and a second group of the light emitting and receiving elements are symmetrically disposed on opposite sides of a centerline of the light blocking plate.

REFERENCES:
patent: 3612882 (1971-10-01), Sheppard
patent: 4429219 (1984-01-01), Yochum et al.
patent: 4594675 (1986-06-01), Yoshizawa
patent: 4686362 (1987-08-01), Merlo
patent: 4723075 (1988-02-01), German

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