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:
Nov. 04, 1997
Filed:
Mar. 29, 1996
Applicant:
Inventors:
Stephen John Taylor, Hyde Heath, Amersham, Buckinghamshire HP6 5RE, GB;
Robert Brian Turner, Chesham, Buckinghamshire HP5 2SE, GB;
Paul Douglas Arnold, Bedford MK42 9TL, GB;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ; H01J / ;
U.S. Cl.
CPC ...
250286 ; 250288 ;
Abstract
A corona discharge ionization source, for use for example with an ion mobility spectrometer, comprises an adjustable corona point electrode (20) which is held transversely within a cylindrical target electrode (14). A corona discharge is produced by a constant or pulsed potential difference between the two electrodes. In alternative embodiments, there may be a further corona discharge electrode (58), providing additional control, and also an annular counterelectrode (60) surrounding the further point electrode (58).