The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 25, 1990
Filed:
Dec. 27, 1989
Applicant:
Inventor:
Donald M Harvey, Webster, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
3541731 ; 354213 ; 354215 ;
Abstract
The speed of frame-to-frame advance after exposure in a camera having a pawl which acts with a single perforation per frame film to provide frame registration with an aperture station is optimized without film distortion by generation of a motor control circuit feedback signal giving information as to position and speed of the advancing next frame perforation. In one embodiment, a sensor develops a pulsed signal from the toothed edge of a pawl that travels with the film perforation. In another embodiment, the passage of a prerecorded pattern spaced a known distance from the perforation is sensed.