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. 22, 1983
Filed:
Dec. 21, 1981
Applicant:
Inventor:
Carl M Ferrar, Hartford, CT (US);
Assignee:
United Technologies Corporation, Hartford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
428607 ; 427 52 ; 427120 ; 427253 ;
Abstract
Disclosed are very fine wires, of the order of 3-6.times.10.sup.-6 m diameter, having cross sections which are uniform within .+-.3%. A common drawn tungsten wire is electrolytically etched to a fine diameter, of the order of 2-4.times.10.sup.-6 m. The variations in cross sectional area along the etched wire are eliminated by selectively vapor depositing tungsten on the surface while using resistance heating. The very fine uniform wires enhance the performance of devices such as fluidic angular rate motion sensors.