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. 13, 1982
Filed:
Sep. 19, 1980
Daniel M Mitchell, Cedar Rapids, IA (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
A variable duty cycle ultrasonic inverter is used to invert unregulated direct current into a high frequency variable pulse width modulated signal that is applied to a low frequency inverter by means of a high frequency transformer. The output of the low frequency is applied to an output filter where a feedback signal is coupled back to the variable duty cycle ultrasonic converter which is controlled by a comparison of the feedback signal and a sinusoidal reference signal. The sinusoidal reference signal is also used to control the low frequency inverter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile