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:
Mar. 04, 1980
Filed:
Nov. 30, 1978
Applicant:
Inventors:
William B Hart, Ipswich, GB;
Reginald T Williams, Hadleigh, GB;
Assignee:
Delta Materials Research Limited, Ipswich, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01K / ;
U.S. Cl.
CPC ...
733631 ; 7319 / ;
Abstract
A differential temperature detector comprises two springs made of a shape memory effect alloy. The springs are oppositely stressed and are coupled together in stressed condition. When the springs are subject to the same temperature, no movement occurs when that temperature changes, but when the springs are subject to different temperatures, movement occurs dependent on the temperature difference.