Optics: measuring and testing – By polarized light examination – With birefringent element
Patent
1977-09-23
1979-02-20
Goldstein, Herbert
Optics: measuring and testing
By polarized light examination
With birefringent element
73190R, G01N 2146
Patent
active
041403967
ABSTRACT:
To reduce errors in a measuring instrument caused by temperature effects from changes in the flow rate of fluids passing through the instrument, the flow of heat is adjusted to balance the flow-rate-dependent temperature increases against the flow-rate-dependent temperature decreases that occur with the same change in flow rate in each flow path. Some of the techniques for adjusting the flow of heat are: (1) controlling the temperature of the fluid at the inlet of the instrument with one heat exchanger and the temperature of the body of the instrument with another heat exchanger; (2) controlling the temperature of the walls of the instrument with a heating coil; and (3) emitting heat within the flow path from a transducer.
REFERENCES:
patent: 2650496 (1953-09-01), Middleton et al.
patent: 2782102 (1957-02-01), Howe
patent: 3967492 (1976-07-01), Allington
patent: 3992940 (1976-11-01), Platzer
Carney Vincent L.
Goldstein Herbert
Instrumentation Specialties Company
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