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:
Jul. 15, 1980
Filed:
Jun. 19, 1978
Applicant:
Inventors:
Thomas E Caffarella, Tucson, AZ (US);
George J Radda, Tucson, AZ (US);
Harry H Dooley, Jr, Tucson, AZ (US);
Assignee:
American Atomics Corporation, Tucson, AZ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21K / ;
U.S. Cl.
CPC ...
250462 ; 250463 ; 250493 ;
Abstract
A glass tube, laser sealed at its ends, has an elongated cross section, two wide side faces, and two narrow side faces. The tube contains a radioactive gas and a transducer, such as a phosphor compound, responsive to the gas. The narrow side faces of the tube are thicker than the wide side faces. Preferably, the wide side faces are outwardly bowed and the narrow side faces are semicylindrical to form an oval cross section. The ratio of the total glass thickness of the wide side faces to the spacing between the wide side faces is approximately 0.7.