Device for determining the maximum temperature of an environment
Creators
Description
This invention concerns a device for determining the maximum temperature of an environment. Its main characteristic is a central cylindrical rod on which can slide two identical tubes, the facing ends of which are placed end to end and the far ends are shaped to provide a sliding friction along the rod. The rod and tubes are fabricated in materials of which the linear expansion factors are different in value. The far ends are composed of tongs of which the fingers, fitted with claws, bear on the central rod. Because of this arrangement of the device the two tubes, placed end to end on being fitted, can expand under the effect of a rise in the temperature of the environment into which the device is introduced, with the result that there occurs an increase in the distance between the two far ends. This distance is maximal when the device is raised to its highest temperature. The far ends are shaped to allow the tubes to slide under the effect of expansion but to prevent sliding in the opposite direction when the device is taken back into the open air and the temperature drops to within ambient temperature. It follows that the tubes tend to return to their initial length and the ends that were placed end to end when fitted now have a gap between them. The measurement of this gap makes it possible to know the maximal temperature sought
Availability note (English)
Available from Institut National de la Propriete Industrielle, Paris (France).Abstract (French)
L'invention concerne un dispositif de mesure de la temperature maximale d'un milieu, caracterise essentiellement en ce qu'il comprend une tige centrale cylindrique sur laquelle peuvent coulisser deux tubes identiques dont les extremites en regard, sont placees bout a bout et les extremites eloignees sont conformees de maniere a pouvoir glisser avec frottement sur la tige. La tige et les tubes sont constitues en des materiaux dont les coefficients de dilatation lineaire ont des valeurs differentes. Lesdites extremites eloignees sont constituees par des pinces dont les doigts, munis de griffes, viennent en appui sur la tige centrale. Grace a cet agencement du dispositif, les deux tubes qui sont places bout a bout au moment de leur montage, peuvent se dilater sous l'effet de l'elevation de la temperature du milieu ou l'on introduit le dispositif. La dilatation provoque un glissement des tubes, il s'ensuit une augmentation de la distance entre leurs extremites eloignees, distance qui est maximale au moment ou le dispositif est porte a sa plus haute temperature. Les extremites eloignees sont conformees de maniere a permettre le coulissement des tubes sous l'effet de la dilatation, mais a empecher le coulissement en sens inverse lorsque l'on replace le dispositif a l'air libre et que la temperature descend au voisinage de la temperature ambiante. Il s'ensuit que les tubes tendent a reprendre leur longueur initiale et que les extremites qui avaient ete placees bout a bout lors de leur montages sont maintenant ecartees l'une de l'autre. La mesure de cet ecartement permet de connaitre la temperature maximale rechercheeAdditional details
Additional titles
- Original title (French)
- Dispositif de mesure de la temperature maximale d'un milieu
Publishing Information
- Imprint Pagination
- 6 p.
- IPC:
- Int. Cl. G01k5/50; G21c17/00.
- IPC
- Int. Cl. G01k5/50; G21c17/00.
- Patent number
- FR patent document 2343236/A/
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 10452972
- Subject category
- S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- MEASURING INSTRUMENTS; REMOTE HANDLING; TEMPERATURE MEASUREMENT; THERMAL EXPANSION
- Descriptors DEC
- EXPANSION