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:
Jun. 15, 1976
Filed:
Aug. 27, 1975
Applicant:
Inventors:
Josef Zweng, Warmbronn, DT;
Iwan Komaroff, Regensburg, DT;
Assignee:
Robert Bosch G.m.b.H., Gerlingen-Schillerhohe, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
250576 ; 356208 ;
Abstract
To test optical transmissivity of exhaust gases from internal combustion engines without requiring cleaning of confining walls of pipes or tubes, a film of liquid is caused to adhere to the inner surface of a transparent tube or pipe section by rotating the tube or pipe section so that the film will remain at the inner wall due to centrifugal force; light is transmitted transversely of the pipe section and through the exhaust gas. The liquid is preferably continually renewed by applying fresh liquid to the inside of the rotating pipe section, excess liquid being removed from an overflow ridge.