Rotary control switch with plural movable concave light reflecto

Details Rotary control switch with plural movable concave light reflecto Rotary control switch with plural movable concave light reflecto

1991-04-10

1993-01-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

200 6102, G01D 534

Patent

active

051773554

ABSTRACT:
A switch (10) comprises a rotary part (12, 14, 16 and 18) and a bracket (24) for supporting the rotary part. The rotary part comprises a knob (12), a shaft (14), attached to, or formed on, the knob, a detent cam (16) attached to, or formed on, the shaft, and a light director (18), attached to the shaft, for directing light from an external light source to a light receiver when the switch is in a first position and for directing light from the light source away from the light receiver when the switch is in a second position. The bracket comprises a detent spring (17) for making contact with the detent cam to provide operating positions for the switch.

REFERENCES:
patent: 4013342 (1977-03-01), Narodny
patent: 4015253 (1977-03-01), Goldstein
patent: 4634861 (1987-01-01), Ching et al.
patent: 4831253 (1989-05-01), Omura et al.
patent: 4906846 (1990-03-01), Arimura
patent: 4964693 (1990-10-01), Branan, Jr. et al.
patent: 5061848 (1991-10-01), Choi

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