Mechanical-electrical combination thermometer
OwnerManfred Urichinventor
Life of this patent
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Abstract
In the thermometer of the present invention a hollow sensing element (9) is connected by a capillary tube (18) to the hollow space of a Bourdon spring (19). The hollow sensing element (9), the capillary tube (18) and the mechanical measuring unit are filled with a substance whose pressure varies with temperature thus causing the Bourdon spring (19) to actuate a mechanical indicating device (5, 6). The capillary tube (18) or the hollow space of the mechanical measuring unit (2) has connected thereto an electric measuring unit (3) which comprises a measuring chamber (15) enclosed by a rigid casing (12), an electric pressure measuring cell (16) bounding the measuring chamber (16), and an electric measuring transducer (4) connected to the pressure measuring cell (16) for generating a transmittable signal.
Claims8
A thermometer with a hollow sensing element whose hollow space is connected by a capillary tube to the hollow space of a mechanical measuring unit, particularly a Bourdon spring, in which the sensing element, the capillary tube and the mechanical measuring unit are filled with a substance whose pressure varies with temperature, and in which the mechanical measuring unit actuates a mechanical indicating device and/or switch, wherein the capillary tube or the hollow space of the mechanical measuring unit has additionally connected thereto an electric measuring unit which includes a measuring chamber enclosed by a rigid casing, an electric pressure measuring cell bounding the measuring chamber, and an electric measuring transducer connected to the pressure measuring cell for generating a transmittable signal.
Dependencies are inferred from the claim text.