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:
Apr. 25, 1989
Filed:
May. 03, 1984
Applicant:
Inventor:
Pieter J Bolhuis, Eindhoven, NL;
Assignee:
U.S. Philips Corp., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 38 ; 315 58 ; 307318 ;
Abstract
A circuit arrangement for starting and operating a gas discharge laser comprises two supply lines (4,5) adapted to supply a direct current to the gas discharge laser (1). A ballast resistor (7) is connected in at least one of the supply lines. By shunting the ballast resistor with means (8) through which a starting current flows during the starting phase of the gas discharge laser, a large current flows through the laser during said starting phase so that the ionization in the laser starts readily. As a result the ignition of the laser is more reliable. The means may be a capacitor or a V.D.R.