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:
Oct. 20, 1987
Filed:
Dec. 05, 1985
Applicant:
Inventor:
Kazumi Masaki, Osaka, JP;
Assignee:
Ken Hayashibara, Okayama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ; H05B / ; H05B / ; H05B / ;
U.S. Cl.
CPC ...
315310 ; 315 71 ; 315 74 ; 338 20 ; 361 93 ;
Abstract
An arc discharge current occurred in dc-illuminated incandescent lamp can be effectively suppressed with an apparatus comprising first resistance connected in series with an incandescent lamp circuit; the second resistance connected in series with the incandescent lamp circuit; and a reverse-blocking triode thyristor connected in parallel with the second resistance and openable with the voltage drop produced between the first resistance by an arc discharge current.