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:
Oct. 26, 1993
Filed:
Jul. 17, 1992
Applicant:
Inventor:
Addison B Scholes, Muncie, IN (US);
Assignee:
Ball Corporation, Muncie, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
331 941 ; 331-3 ; 324305 ;
Abstract
An atomic frequency standard cell having low helium permeability includes first and second windows sealed by fusible annular gaskets to sealing surfaces defined by a tubular cylindrical body. One of the windows defines an opening, and a fill tube is sealed the window adjacent the opening by a tube gasket. The gaskets are made of a lower softening point glass such as borosilicate glass, and the body, windows and fill tube are formed of a higher softening point glass such as aluminosilicate glass. The assembly is sealed together by heating it to a temperature that causes the gaskets to fuse and seal the adjacent components together.