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:
Jul. 27, 1982
Filed:
Jun. 13, 1980
Applicant:
Inventors:
Makoto Murakoshi, Asaka, JP;
Tamotu Yoshizawa, Asaka, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kamagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05G / ; G05G / ;
U.S. Cl.
CPC ...
74479 ; 33 / ; 744246 ; 350 86 ;
Abstract
A pair of parallel lead screws are meshed with a pair of helical racks provided on opposite faces of a movable stage slidable on a flat or cylindrical base plate. The pair of parallel lead screws are driven by a pair of electric motors independently of each other. One of the helical racks has teeth extending in a direction to intersect with the teeth of the other helical rack. By selecting the direction of rotation of the pair of lead screws independently, the direction of movement of the stage can be selected. The stage may be made of a pair of plates having the helical racks on the inner or outer faces of the plates.