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. 22, 1977
Filed:
Jan. 15, 1973
Bruce A Sawyer, Woodland Hills, CA (US);
Other;
Abstract
A control system for controlling the relative movement of a head member over a surface such as a plate member in accordance with digital input information. The head member and the surface form a linear, two-axis synchronous motor and the input signal to the head member is controlled to be a translating field vector to produce movement of the head member relative to the surface. The phase of the translating field vector is controlled to lead or lag the position vector of the surface by an electrical angle which is a direction function of the acceleration or deceleration required. An initial acceleration is used to bring the head member up to the desired terminal speed as quickly as possible and with the head then moved at a constant speed until a point when a signal is applied to produce a deceleration to slow down the head so that the head may be stopped at the position on the surface. Additional acceleration and deceleration vectors are provided to control the movement of the head member. The signal applied to the head member may be an analog signal formed as an integrated value from the digital input information.