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. 19, 1980
Filed:
May. 12, 1978
Vahram W Biricik, Rancho Palos Verdes, CA (US);
Kang R Chun, Pacific Palisades, CA (US);
Laurence S Gresko, Long Beach, CA (US);
Northrop Corporation, Los Angeles, CA (US);
Abstract
A cathode structure for a high power laser is formed from a first sheet of a hard metallic material such as molybdenum, which is joined to a second sheet of the same material by brazing, these first two sheets being brazed to a support structure of the same material. The first two sheets have a plurality of side by side longitudinal channels formed therein, the channels of one of these sheets being positioned between the channels of the other sheet (in a 180.degree. spatial phase relationship therewith). Crosswise channels are provided along opposite edges of both of the sheets to provide fluid communications to the opposite ends of the longitudinal channels. A cooling liquid such as water is fed to the transverse channels, and circulated through the longitudinal channels in parallel to effect efficient cooling of the cathode. The cathode is assembled by placing a thin foil of brazing material, such as a suitable gold/copper/nickel alloy, between the two channeled sheets and between one of the sheets and the support plate. Thin wires of hard material such as molybdenum are tack welded to the foil surfaces facing the channeled sheets, these wires running parallel to each other and normal to the direction of the channels. This structure is then placed in an airtight compartment and pressed between die surfaces. The compartment is then evacuated and the dies heated such as by electrical resistance to melt the brazing material and braze the cathode parts together to form an integral unit.