Measuring and testing – Specific gravity or density of liquid or solid – Float operated indicator
Patent
1980-05-02
1982-10-12
Yasich, Daniel M.
Measuring and testing
Specific gravity or density of liquid or solid
Float operated indicator
73440, 733225, G01N 916, G01N 920
Patent
active
043532535
ABSTRACT:
A device for measuring the density of fluids comprises two float elements of unequal density distribution pivotally mounted on a common axis about which they rotate in opposite directions with change of density of the fluid in which they are immersed. The density is indicated by the position of an index carried by one element relative to a scale carried by the other element. Scale range is increased and scale linearity is improved by having the elements respond respectively differently to density changes in the upper and lower density ranges. Temperature compensation is effected by the choice of materials for the float elements relative to the thermal expansion characteristics of the fluid, and by the manner in which the relatively more dense and relatively less dense portions of each float element are mounted with respect to the axis. The float elements may be mounted in an at least partially transparent housing into which the fluid may be drawn through an expanding channel formed as an inverted U-tube in which separated bubbles collect.
REFERENCES:
patent: 2296169 (1942-09-01), Linebarger
patent: 2409310 (1946-10-01), Piper
patent: 2579220 (1951-12-01), Vine
patent: 2674119 (1954-04-01), Trainor
patent: 2674120 (1954-04-01), Trainor
patent: 3691847 (1972-09-01), Wallskog
patent: 3908467 (1975-09-01), Schwen et al.
patent: 4037481 (1977-07-01), Callahan
patent: 4136551 (1979-01-01), Lunstroth
patent: 4236405 (1980-12-01), Lunstroth
Hinds William R.
Yasich Daniel M.
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