Linearizing elements for variable area flowmeter

Details Linearizing elements for variable area flowmeter Linearizing elements for variable area flowmeter

1975-04-03

1976-08-31

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

Thermal type

73DIG5, 73432A, G01F 124

Patent

active

039772489

ABSTRACT:
A rotameter system adapted to produce an output indication that is linearly proportional to flow. The primary element of the system includes a float contained in a variable area tube through which flows the fluid to be measured, the float being raised or lowered in the tube as a function of flow rate, and a bar magnet mechanically coupled to the float and axially movable therewith. The secondary element of the system includes a rotatable follower magnet magnetically coupled to the bar magnet and a pointer mounted on the shaft of the follower magnet whereby the pointer sweeps from zero to maximum along a scale as the float travels from its low to its high position. A mass is eccentrically mounted on the shaft of the follower magnet, the position of the mass relative to the shaft axis being adjusted to produce a moment compensating for the non-linear relationship between flow rate and pointer movement.

REFERENCES:
patent: 2509644 (1950-05-01), Kinderman
patent: 3094002 (1963-06-01), Ryan et al.
patent: 3164989 (1965-01-01), Busillo et al.
patent: 3315523 (1967-04-01), Conkling
patent: 3425279 (1969-02-01), Conkling et al.

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