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:
Mar. 22, 1977
Filed:
Jan. 19, 1976
Applicant:
Inventors:
John N Driscoll, Natick, MA (US);
Frederick F Spaziani, Lexington, MA (US);
Assignee:
HNU Systems Inc., Newton Upper Falls, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313242 ; 2323 / ; 250373 ; 250374 ; 313240 ; 313241 ;
Abstract
An electrode arrangement for the detection of species ionized by radiant energy from a radiation source, comprising: an annular cathode; a shield, opaque to the radiant energy, extending across the cathode and having an aperture smaller than and coaxial with the annulus formed by the cathode; and an elongated anode having its distal end coaxially of the cathode and the shield aperture, the cathode being shielded from and the anode being exposed to the radiant energy from the radiation source.