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. 22, 1987
Filed:
Sep. 23, 1985
Applicant:
Inventor:
Charles F Morrison, Jr, Boulder, CO (US);
Assignee:
Granville-Phillips Company, Boulder, CO (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; H02H / ;
U.S. Cl.
CPC ...
324459 ; 324500 ; 328-7 ; 361 42 ;
Abstract
Different approaches are described, in ionization gauges or the like, which either prevent dangerous open ground conditions and/or sense the presence of the open ground whereby the controller power may be automatically turned off. Circuitry for extending the measurement range of ionization gauges is also described.