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:
Jan. 04, 1977
Filed:
May. 04, 1973
Applicant:
Inventor:
Klas Rudolf Wiklund, Taby, SW;
Assignee:
AGA Aktiebolag, Lidingo, SW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73336 ; 73 30 ; 73386 ; 73410 ;
Abstract
Two embodiments of a device and method are disclosed for providing a correction factor for the velocity of electromagnetic radiation in air. The devices include a pressure-responsive vessel having a predetermined quantity of gas enclosed therein and means for sensing the size of the enclosed volume to provide a measurement of the correction factor. Means are also disclosed for employing a humidity responsive device for moving a scale so that the correction factor is also made responsive to the humidity.