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. 03, 2002
Filed:
Dec. 20, 2000
Michael Rigby, Huntingdon, GB;
Gary Paul Cullen, Godmanchester, GB;
PCME Ltd., Cambridgeshire, GB;
Abstract
A particle detector for detecting particles flowing in a duct has a first triboelectric probe ( ) for detecting the particles and a second triboelectric probe ( ) for detecting a signal generated by contaminants on the particle detector. The presence of signal-generating contaminants on the particle detector will result in an error signal on the first probe ( ) and a signal on the second probe ( ). Therefore, the presence of a signal on the second probe ( ) will indicate that the signal appearing on the first probe ( ) includes an error signal. If the ratio of the magnitude of the signal generated on the second probe ( ) to the magnitude of the signal generated on the first probe ( ) exceeds a certain pre-defined limit, cleaning of the detector will be required.