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:
May. 23, 1978
Filed:
Jan. 28, 1977
Applicant:
Inventors:
Bernard Ormili, Lyon, FR;
Georges Comte, St Leu la Foret, FR;
Assignee:
Les Cables de Lyon S.A., Lyon Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P / ;
U.S. Cl.
CPC ...
29 3 / ; 29600 ;
Abstract
A machine for manufacturing circular section helical wave-guides and providing simultaneous calibration of the bore of the helix and snug fitting of the screen around the helix. The helix is loosely fitted in an enveloping tube and both tube and helix are drawn through a reducing die for drawing the tube down onto the helix. The bore of the helix is established by a mandrel and the outer surface of the helix is softened just before entering the die whereby the helix is welded to the inner surface of the tube.