Rotameter with float guides

Details Rotameter with float guides Rotameter with float guides

1991-05-10

1993-02-16

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Using differential pressure

7386157, G01F 122

Patent

active

051860589

ABSTRACT:
A rotameter comprises a tapered flow passage, a magnetized float disposed in the tapered flow passage, and a plurality of float guides with guiding edges disposed parallel to and about the central axis of the tapered flow passage limiting the movements of the float in directions parallel tot he central axis of the flow passage, wherein at least one of the plurality of float guides includes an elongated cavity disposed closely following the guiding edge thereof, which elongated cavity accommodates a ferromagnetic rolling element of a round shape that follows the movement of the magnetized target in a rolling motion due to the magnetic attractive force therebetween, in which combination the rolling element functioning as a rolling electrical contact included in a potentiometric position sensor provides an electrical signal representing the position of the magnetized float relative to the tapered flow passage. The present invention also teaches a three-in-one flowmeter employing two rotameters connected in series that determines the density, mass flow rate and volume flow rate of fluid moving through the flowmeter.

REFERENCES:
patent: 2404361 (1946-07-01), Brewer
patent: 3253459 (1966-05-01), Sorenson et al.
patent: 4873872 (1989-10-01), Wechsler

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