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:
Aug. 29, 1978
Filed:
Apr. 14, 1977
Jerome A Rodder, Los Altos, CA (US);
Other;
Abstract
A housing has elongated cavities in which four hot wires forming the arms of a bridge are disposed. Each hot wire comprises a first segment bent in half to extend along the length of the cavity away from a junction, and a second segment bent in half to extend along the length of the cavity away from the junction in the opposite direction from the first segment. The junction is centrally located relative to the ends of the cavity. The first and second segments are electrically connected to each other at one end and are electrically connected to other hot wires in the bridge at the other end by a printed circuit board at the junction. The middle of each segment is wrapped around first and second closely spaced rods deformed to exert tension on the segment. The circuit board is located in a chamber having a larger cross section than the cavities. In using the apparatus for chromatography, unknown gases in a carrier enter one of the cavities near the chamber. A reference gas enters the chamber to prevent the unknown gases from flowing to the chamber. The gases exit from the ends of the cavity.