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:
Dec. 15, 1987
Filed:
Dec. 20, 1984
Applicant:
Inventor:
Charles R Wojciechowski, West Chester, OH (US);
Assignee:
General Electric Company, Cincinnati, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01T / ;
U.S. Cl.
CPC ...
250374 ; 250385 ; 220-3 ;
Abstract
A substrate penetrates a main seal in an ionization chamber filled with pressurized gas. In one form of the present invention, a second chamber is provided around the region of penetration. The substrate then also penetrates the second chamber. The second chamber is pressurized with a gas at a lower pressure than in the ionization chamber. Thus, the pressure differential across the main seal is lowered, thereby reducing the load on the main seal.