Control device

Details Control device Control device

1984-09-28

1986-02-25

Moy, Magdalen Y. C.

Illumination

Light modifier

Adjustable or positionable

362320, 362293, 362362, F21V 1702

Patent

active

045731101

ABSTRACT:
A reflective screen with a gradient of reflectivity is moved by a control handle outside a cabinet to display different parts of the screen through a window to a LED and a phototransistor. The changing of the light reflected by the screen from the LED to the phototransistor is used to control an electrical parameter, providing a low cost control device.

REFERENCES:
patent: 1499961 (1924-07-01), Auchstetter
patent: 3089386 (1963-05-01), Hunt
patent: 3843878 (1974-10-01), Ueda et al.
patent: 4352150 (1982-09-01), Hosoda
patent: 4400765 (1983-08-01), Kochem

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