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1. WO1990014592 - IMPROVEMENTS IN OR RELATING TO DETERMINING THE TEMPERATURE AT WHICH A SUBSTANCE CHANGES STATE

Publication Number WO/1990/014592
Publication Date 29.11.1990
International Application No. PCT/GB1990/000751
International Filing Date 16.05.1990
Chapter 2 Demand Filed 29.10.1990
IPC
G01N 25/04 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
25Investigating or analysing materials by the use of thermal means
02by investigating changes of state or changes of phase; by investigating sintering
04of melting point; of freezing point; of softening point
CPC
G01N 25/04
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
25Investigating or analyzing materials by the use of thermal means
02by investigating changes of state or changes of phase; by investigating sintering
04of melting point; of freezing point; of softening point
Applicants
  • RAHIMZADEH, Bizhan [IR]/[GB]
Inventors
  • RAHIMZADEH, Bizhan
Agents
  • SHERRARD-SMITH, Hugh
Priority Data
89304936.116.05.1989EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) IMPROVEMENTS IN OR RELATING TO DETERMINING THE TEMPERATURE AT WHICH A SUBSTANCE CHANGES STATE
(FR) AMELIORATIONS APPORTEES A LA DETERMINATION DE LA TEMPERATURE A LAQUELLE UNE SUBSTANCE CHANGE D'ETAT
Abstract
(EN)
Infra-red light from an emitter (16) is directed through a glass slide (10) to an area (12) on which a solid substance is located. Light reflected from the undersurface of the solid substance is received by a receiver (18). The substance is heated by a strip heater (14). When the substance changes state the amount of reflected light arriving at the receiver (18) varies, and information coming from an electronic thermometer (20) or (20A) records the temperature at which the change of state has occurred.
(FR)
Une lumière infra-rouge provenant d'un émetteur (16) est dirigée à travers une lame de verre (10) sur une zone (12) où est posée une substance solide. La lumière réfléchie en provenance de la surface inférieure de la substance solide est reçue par un récepteur (18). La substance est chauffée au moyen d'un collier chauffant (14). Lorsque la substance change d'état, la quantité de lumière réfléchie reçue par le récepteur (18) varie, et un thermomètre électronique (20 ou 20A) enregistre la température à laquelle ce changement d'état s'est produit.
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