Position transducer having optical beam generator for covering w

Details Position transducer having optical beam generator for covering w Position transducer having optical beam generator for covering w

1996-11-25

1998-09-08

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250229, 341 31, 200332, G06M 700, G01D 534

Patent

active

058048162

ABSTRACT:
A position transducer determines a current key position through variation of light intensity interrupted by a shutter plate attached to a key, and a semi-column shaped convex lens elongates the light beam radiated from an optical fiber in a direction parallel to the trajectory of the key so that the light beam fully covers the motion of the shutter plate.

REFERENCES:
patent: 2008150 (1935-07-01), Nelson
patent: 3275831 (1966-09-01), Martin
patent: 5001339 (1991-03-01), Starkey et al.
patent: 5194919 (1993-03-01), Katayama
patent: 5231283 (1993-07-01), Starkey et al.

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