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:
Jan. 12, 1993
Filed:
Mar. 14, 1991
Craig N Schwartz, Torrance, CA (US);
Rolf Kich, Redondo Beach, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
An iris for an electromagnetic structure, such as a resonator assembly, is provided with a set of grooves introducing relief to thermally induced stresses, this allowing the iris to be fabricated of a metal having a greater coefficient of thermal expansion than the material of a sidewall and end walls of the resonator assembly. The grooves are arranged spaced apart from the central coupling aperture, and are disposed in an annular region of the iris plate composing the central coupling aperture. The grooves may be cut into the iris plate from both sides of the plate to extend partway into the plate, typically, approximately three-quarters of the distance through the plate. Alternatively, the grooves may pass completely through the plate, whereupon annular disks are soldered to the opposite sides of the iris plate to close off the grooves to ensure that coupling of electromagnetic power between opposite sides of the iris takes place only through the coupling aperture.