Method of making a gas pressure thermometer

Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator

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Details

29407, 374198, 374203, B21D 5300, B23Q 1700, G01K 500

Patent

active

046061045

ABSTRACT:
In making a gas pressure thermometer measuring system comprising a container for the gas, a Bourdon tube, and a capillary of no more than about 20 m which connects said container to one end of the Bourdon tube is filled with the gas to a superatmospheric pressure prevailing at the ambient temperature. The system is hermetically sealed and the free end of the Bourdon tube is connected to a temperature indicator or recorder through a transmission mechanism. According to the method of the invention, a Bourdon tube is used which has a long overall spring movement of at least 22 mm and an effective spring movement of about 11 mm, the measuring system is filled with the gas to a pressure, prevailing at ambient temperature, of at least about 5 bar, and the non-linear indication occurring as the Bourdon tube is uncoiled is compensated for by adjusting angles .alpha. and .beta.. Preferably, with the effective spring excursion of the Bourdon tube of about 11 mm a spring excursion of about 40-22 mm is selected, and the transmission mechanism preferably has a factor of magnification of no more than about 1:8.5.

REFERENCES:
patent: 2477242 (1949-07-01), Fahy
patent: 2478031 (1949-08-01), Visser
patent: 3107533 (1963-10-01), Le Van et al.
patent: 3934479 (1976-01-01), Posnansky
patent: 4148123 (1979-04-01), Neubeck et al.

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