Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-03-15
1994-04-26
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
235472, 358473, H01J 314
Patent
active
053069080
ABSTRACT:
A hand-held optical scanner comprising an optical sensor for generating a data signal representative of a scanned object; a housing for hand-displaceably supporting the optical sensor; a roller mounted on the housing for enabling rolling displacement of the housing over a scanned object in a predetermined scan direction; a displacement sensing device for sensing the angular displacement of the roller and generating a displacement signal representative thereof; a motor drivingly linked to the roller for applying a driving torque thereto; a controller for actuating the motor responsive to the displacement signal for angularly accelerating and decelerating the roller for urging an operator to hand displace the housing across a scanned object within a predetermined speed range which is optimal for scanning.
REFERENCES:
patent: 3541248 (1970-11-01), Young
patent: 4703186 (1987-10-01), Nakayama et al.
patent: 4709144 (1987-11-01), Vincent
patent: 4793812 (1988-12-01), Sussman et al.
patent: 4870268 (1989-09-01), Vincent et al.
patent: 4926041 (1990-05-01), Boyd
patent: 5182450 (1993-01-01), Pan
Aas Eric F.
Dalton Dan L.
Kochis Richard L.
McConica Charles H.
Miksch Eugene A.
Hewlett--Packard Company
Nelms David C.
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