Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1994-09-26
1996-04-30
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
359221, 235472, H01J 314
Patent
active
055127444
ABSTRACT:
An optical code reader having an improved mirror support is disclosed herein. The optical code reader is of the type which scans a code with a light beam and determines the information embodied in the code by decoding signals representative of the portions of the light beam reflected from the code. The scanning motion of the light beam is produced by a mirror supported for oscillation at a predetermined frequency. In particular, the mirror is supported by a shaft which is supported relative to the frame of the reader by two sets of four U-shaped springs. One set of springs is fasted between the first end of the shaft and the frame and the second set is fastened between the second end of the shaft and the frame. This spring configuration supports the mirror and shaft for oscillation about a desired rotational axis without the use of bearings.
REFERENCES:
patent: 5015831 (1991-05-01), Eastman et al.
patent: 5021641 (1991-06-01), Swartz et al.
patent: 5115120 (1992-05-01), Eastman
patent: 5412198 (1995-05-01), Dvorkis
Annis Jeffrey R.
Scofield Robert E.
Allen-Bradley Company Inc.
Horn John J.
Le Que T.
Miller John M.
Morrow James G.
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