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:
Mar. 03, 1981
Filed:
Jan. 17, 1980
Applicant:
Inventors:
Assignees:
Nippon Telegraph and Telephone Public Corporation, both of, JP;
Hitachi, Ltd., both of, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318603 ; 318685 ; 318341 ;
Abstract
In an apparatus for driving a motor wherein a carrier or stage carrying a sample thereon is located and moved to a predetermined position by controlling the slow-up and slow-down speed of the motor at the start and prior to the stopping thereof, respectively, this invention provides for speed control of the motor in accordance with a function of arbitrary characteristic slope, the function being stored in the form of a succession of digital values which may be sequentially accessed by a counter control circuit responsive to a control command signal representing the on-off condition for the motor.