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. 21, 2003
Filed:
Nov. 30, 2001
Applicant:
Inventors:
Nobutaka Nakamura, Chiba, JP;
Ryoichi Kinoshita, Chiba, JP;
Assignee:
Seiko Instruments Inc., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 1/00 ; G01N 2/520 ; G01K 1/20 ; G01K 1/704 ; G01K 1/708 ;
U.S. Cl.
CPC ...
G01N 1/00 ; G01N 2/520 ; G01K 1/20 ; G01K 1/704 ; G01K 1/708 ;
Abstract
An insulating substrate provided with two types of metallic or alloy circuit patterns for detecting temperature difference between a sample side and a reference side, and also a metallic resistance circuit pattern, is fixed to a heat sink, and the heat sink is temperature controlled. If a temperature difference between the sample and the reference is detected, electrical power supplied to a compensation heater using metallic resistors is adjusted by a differential heat compensation circuit so that the temperature difference is immediately returned to zero, and a difference in supplied power is output as a differential heat flow.