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US 4,762,423 AGranted
Evaporation calorimeter
OwnerWalter Bastainventor
Life of this patent
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Abstract
The invention relates to a calorimeter based on the evaporation principle, for determining the heat supplied by a heating surface and is primarily characterized by that at least two bulbs filled with measuring liquid (2) are provided, whereby at least one bulb (measuring bulb 1) is in good thermal contact with the heating surface (3) and whereby at least one other bulb (comparison bulb 4) is thermally insulated with respect to heating surface (3).
Claims16
A liquid-evaporation calorimeter for determining the heat delivered from a surface, comprising:
- a housing composed of a thermally insulating material and mounted on said surface;
- a measuring bulb in said housing containing a liquid evaporatable by heat delivered from said surface and provided with a vent to release vapors of said liquid, whereby a level of said liquid in said measuring bulb drops upon heating of said measuring bulb and evaporation of said liquid in said measuring bulb;
- a comparison bulb in said housing thermally isolated from said surface and containing said liquid, said comparison bulb being provided with a vent to release vapors of said liquid, whereby a level of said liquid in said comparison bulb drops upon evaporation of said liquid in said comparison bulb;
- heat-conductive means in said housing forming a thermal bridge in direct contact with said measuring bulb, spaced from said comparison bulb and in heat-conducting relation with said surface for conducting heat from said surface to said measuring bulb;
- and
- a transparent plate on said housing covering at least portions of said bulbs and through which said levels are visible, said transparent plate defining in said housing with said bulbs an air gap separating said plate from said bulbs, whereby a difference in said levels represents heat delivered by said surface.
3 more elements
Dependencies are inferred from the claim text.