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:
Feb. 06, 1979
Filed:
Oct. 03, 1977
Robert J Nedreski, Erie, PA (US);
General Electric Company, Erie, PA (US);
Abstract
A constant horsepower drive system for a grinding wheel includes a first motor and associated control for rotating the wheel at a constant peripheral or surface speed and a second motor and associated control for providing linear relative motion between the wheel and a workpiece. Constant horsepower operation below the rated or base speed of the first motor is achieved by controlling the relative position of the wheel and the workpiece through the operation of the second motor. The control of the second motor is effected by the development of a correction signal which is a function of the quotient of a signal value representing the desired wheel surface speed divided by a second signal representing the counter electromotive force of the first motor.