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. 19, 2005
Filed:
May. 11, 2001
Michael Sussman, Verwood, GB;
Charles Edward Downs, Wimbourne, GB;
Tom Ford, Royston, GB;
David Smith, Royston, GB;
Michael Sussman, Verwood, GB;
Charles Edward Downs, Wimbourne, GB;
Tom Ford, Royston, GB;
David Smith, Royston, GB;
Zellweger Analytics Limited, Poole, GB;
Abstract
The present invention provides a method of calibrating sensors within a gas detector () having a housing containing a gas inlet whereby gas can diffuse from the inlet to the sensors. The gas inlet in the housing is held against part () of the calibration apparatus to form a sealed gas interface between the apparatus and the detector; a source () of pressurized calibration gas is connected to the apparatus, and a predetermined dose of calibration gas is delivered to the interface between the detector () and the calibration apparatus () at a predetermined pressure. The source () of pressurized calibration gas may contain single or multiple calibration doses and, if the former, the calibration apparatus includes a dosing system such as cylinder () for metering individual doses of calibration gas.