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:
Oct. 10, 2017
Filed:
Dec. 13, 2012
Shimadzu Corporation, Kyoto-shi, Kyoto, JP;
Kei Shinada, Uji, JP;
Shigeyoshi Horiike, Uji, JP;
Shimadzu Corporation, Kyoto, JP;
Abstract
Provided is a discharge ionization current detector that is highly durable and yet can be produced at a low cost. An electrode structureconsisting of a dielectric-coated metal tube, with an insulator-coated metal wireincluded therein, is inserted from above into a first gas passage including a dielectric tube. The metal tubeis connected to the ground on the upstream side of the first gas passage. One end of the metal wireis extracted from the upstream side of the first gas passage to the outside and connected to a bias power source. An area which is not covered with the insulator is provided at the other end of the wire. This area is arranged in a second gas passage, which extends from the downstream end of the first gas passage. A metal electrode consisting of a flanged metal tubeis placed in the second gas passage and connected to an ion current detecting circuit. In the present configuration, the second gas passage, which should be heated to high temperatures, has fewer portions at which metallic parts are in contact with insulating members. This is advantageous for improving the durability of the device and reducing the used amount of expensive, highly heat-resistant sealing members and/or insulating members.