Mechanical-electrical combination thermometer

Details Mechanical-electrical combination thermometer Mechanical-electrical combination thermometer

1997-02-24

1998-10-06

Bennett, G. Bradley

Thermal measuring and testing

Temperature measurement

Mechanical

374143, 374188, G01K 536

Patent

active

058167080

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.

REFERENCES:
patent: 3191438 (1965-06-01), Myers
patent: 3403558 (1968-10-01), Elliott
patent: 3410141 (1968-11-01), Zurstadt
patent: 3875800 (1975-04-01), Stockton
patent: 4279155 (1981-07-01), Balkanli
patent: 4566807 (1986-01-01), Koolen
patent: 4663608 (1987-05-01), Kelly
patent: 4893945 (1990-01-01), Okano et al.

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