Density measuring apparatus
First Claim
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1. An instrument for measuring the density of fluids, comprising:
- a housing having a chamber with a vertical space to be filled with an electrically-nonconductive fluid to be examined;
a capacitor device variable in its capacitance and including said housing and a buoyant member in said housing chamber buoyantly movable vertically in the fluid; and
load means for balancing the buoyancy of said buoyant member with a counterforce applying a balancing force increasing with change in position of the buoyant member, said load means including a spring in and connected to said housing and connected to said buoyant member;
said capacitor device functioning to indicate the position of the buoyant member to indicate the density of the fluid in the chamber.
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Abstract
A simple and mechanically-rugged calculation or monitoring of the density of fluids, particularly of fuels serving the purpose of driving an internal-combustion engine, provides that a buoyant member is immersed into the fluid under examination, the buoyancy thereof being balanced out via a load applied with a spring. A capacitor that is dependent on the buoyancy and, therefore, on the density of the fluid under examination is formed between the buoyant member and the housing that holds the spring and is filled with the fluid under examination, the capacitor being monitored via a circuit arrangement.
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Citations
13 Claims
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1. An instrument for measuring the density of fluids, comprising:
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a housing having a chamber with a vertical space to be filled with an electrically-nonconductive fluid to be examined; a capacitor device variable in its capacitance and including said housing and a buoyant member in said housing chamber buoyantly movable vertically in the fluid; and load means for balancing the buoyancy of said buoyant member with a counterforce applying a balancing force increasing with change in position of the buoyant member, said load means including a spring in and connected to said housing and connected to said buoyant member; said capacitor device functioning to indicate the position of the buoyant member to indicate the density of the fluid in the chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification