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:
May. 11, 1976
Filed:
Aug. 12, 1974
Robert Parker, Danville, CA (US);
RPR, Inc., Dublin, CA (US);
Abstract
A rapid and convenient temperature indicator is provided having a tubular heat-conducting member joined at one end to a heat sink and having the other end rounded for ease of contact with the surface whose temperature is to be measured. Conveniently, a cylindrical protective cover is provided which is slidably mounted on the heat sink by means of a slot relieved threaded member and nut. The heat-conducting tube has a darkened surface which is coated with a liquid crystal composition having a mesophase temperature range which provides a temperature response in the range of interest. One or more liquid crystal compositions may be employed providing bands along the tube. A reticule is provided, which can be calibrated to give an accurate approximation of the temperature of the surface being measured.