Thermometer

Details Thermometer Thermometer

G - Physics

01

K

G01K 5/62 (2006.01) G01K 1/08 (2006.01) G01K 5/70 (2006.01)

Patent

CA 2172235

A thermometer includes a housing with a C-shaped window therein and a temperature scale adjacent to the window. A member within the housing has a colored or shaded region with a boundary visible through the window. The colored region is sufficiently large so that it fills the window from the lower side of the temperature scale up to the boundary. The boundary is moved relative to the temperature scale by a bimetal coil spring. The boundary and the colored region indicate the temperature being read by the thermometer. In one version of the invention, the window extends in an arc of about 180°, the member is a substantially planar disk, and the colored region is a semi-circular portion of the disk. The disk is mounted within the housing on a shaft, and the disk rotates relative to the shaft. The thermometer is easily readable under a variety of viewing conditions, especially adverse viewing conditions.

Cette invention concerne un thermomètre comprenant un boîtier à fenêtre en C bordé par une échelle de mesure. € l'intérieur du boîtier se trouve un élément à zone colorée ou ombrée dont la limite est visible à travers la fenêtre. La zone colorée est suffisamment large pour occuper toute la fenêtre entre sa limite et la base de l'échelle de mesure. Cette limite se déplace devant l'échelle de mesure selon la dilatation d'un ressort bimétallique enroulé en spirale. La zone colorée et sa limite indiquent la température mesurée. Dans une variante de la'invention, la fenêtre fait un arc de cercle d'environ 180 degrés, l'élément indicateur est un disque sensiblement plan et la zone colorée occupe la moitié du disque. Le disque est monté sur un axe à l'intérieur du boîtier et tourne autour de celui-ci. L'indication du thermomètre est facile à lire dans des conditions d'observation variées, en particulièrement dans des mauvaises conditions.

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