Low melting gallium, indium, and tin eutectic alloys, and thermometers employing same
AssigneeGeraberger Thermometerwerk GmbH
InventorsGerd Speckbrock, Siegbert Kamitz, Marion Alt, Heribert Schmitt
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Abstract
A clinical thermometer with maximum function with a non-toxic eutectic Ga alloy as measuring fluid 14 inside a measuring tube 13 which provides adhesion forces larger than the cohesion forces inherent in liquid 14. To reach the maximum function, therefore, the customary Hick'sche constriction is not required any more facilitating production and handling of said clinical thermometer. Furthermore, a special Ga/In/Sn alloy is described, which may be used not only for clinical thermometers but also as a lubricant.
Claims14
A low melting eutectic alloy having a melting point of -15.degree. C. or below, consisting of a ternary gallium, indium, and tin eutectic base alloy of, in weight percent, 65-95% Ga, 5-22% In, Sn in an amount greater than zero percent and up to 11 percent, and inevitable impurities, and at least one further alloying element selected from the group consisting of an amount of Bi effective to raise the fluidity of the alloy and less than 2 weight percent based on the total weight of the alloy, and an amount of Sb effective to increase the oxidation resistance of the alloy and less than 2 weight percent based on the weight of the alloy.
A gallium, indium, and tin eutectic alloy, consisting of, in weight percent, 68-69% Ga, 21-22% In, 9.5-10.5% Sn, and optionally 0-2% Bi and 0-2% Sb, and inevitable impurities, wherein the melting point of said eutectic alloy is -15.degree. C. or less.
A low melting eutectic alloy having a melting point of -15.degree. C. or below, consisting essentially of a ternary gallium, indium, base tin alloy of, in weight percent, 65-95% Ga, 5-22% In, Sn in an amount greater than zero and up to 11%, and inevitable impurities, and at least one further alloying element selected from the group consisting of an amount of Bi effective to raise the fluidity of the alloy and less than 2 weight percent based on the total weight of the alloy, and an amount of Sb effective to increase the oxidation resistance of the alloy and less than 2 weight percent based on the weight of the alloy.
Dependencies are inferred from the claim text.