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. 12, 1991
Filed:
Jan. 05, 1990
Applicant:
Inventor:
Kunio Ishiyama, Mobara, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ; H02M / ;
U.S. Cl.
CPC ...
219 / ; 219 / ; 363 21 ; 363 97 ;
Abstract
A high frequency heating method includes the steps of controlling a closing period of a switching circuit on the basis of a specified magnetron output value and setting the closing period thereof to a predetermined value. A high frequency heating system includes a heating output control circuit for controlling the closing period thereof on the basis of the specified magnetron output value and an initial output limit circuit for controlling the closing period thereof to a predetermined value.