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. 22, 1986
Filed:
Sep. 06, 1984
Applicant:
Inventor:
Iwao Hamaguchi, Yamato, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01C / ; H01C / ;
U.S. Cl.
CPC ...
338 20 ; 338 21 ; 372 81 ;
Abstract
A ballast resistor device for use in a gas laser system for stabilizing the operation of the gas laser includes a housing, a ballast resistor element and a filler material filled in the space between the housing and the resistor element is provided. In the preferred embodiment, the filler material is substantially high in dielectric breakdown strength as well as in thermal conductivity, so that the ballast resistor device of the present invention has a rigid structure providing a strong mechanical and electrical durability, not to mention an excellent heat dissipating characteristic thereby allowing to prevent the resistor element from being overheated.