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US 4,244,218 AGranted
Fluid measuring device
AssigneeEric Thomas Scriven
InventorJosef Wohrl
Life of this patent
Estimating the term…
Abstract
A fluid measuring device comprises a body suspended by a force transmission means within a container for receiving the fluid to be measured. The weight of the body is counterbalanced by a tare weight acting on a lever connected to the force transmission means. A gyroscopic load cell measures the vertical force exerted on the body by the fluid in the container and is calibrated so that a load cell display expresses the quantity of fluid received discharged or existing in the container as its volume or its weight. Servo-operable inlet and outlet valves to the container can be controlled by signals from the load cell whereby the device will meter predetermined quantities of the fluid.
Claims14
A fluid measuring device comprising:
- a container for receiving the fluid to be measured;
- a body positioned within said container;
- a force transmission means retaining said body in a predetermined vertical position within said container irrespective of the fluid level in said container whereby said body is progressively immersed in the fluid when fluid is added to said container and said body progressively emerges from the fluid when fluid is withdrawn from said container, the cross-sectional area of said body at any fluid level within the operational range of the fluid measuring device having a known relationship with the cross-sectional area of said container at the same fluid level, and
- a gyroscopic load cell capable of measuring an applied force without movement of said force relative to said load cell, said force transmission means being connected to said load cell whereby the resultant vertical force on said body at any fluid level is transmitted to said load cell which is calibrated to take account of said known relationship and to express said resultant vertical force as a quantity of the fluid.
1 more element
A liquid weighing device comprising:
- a container for receiving the liquid to be weighed;
- a body positioned within said container;
- a force transmission means retaining said body in a predetermined vertical position within said container irrespective of the liquid level in said container whereby said body is progressively immersed in the liquid when liquid is added to said container and said body progressively emerges from the liquid when liquid is withdrawn from said container, the cross-sectional area of said body at any liquid level within the operational range of the liquid weighing device having a known relationship with the cross-sectional area of said container at the same liquid level,
- a gyroscopic load cell which measures applied forces without relative movement of said forces, said force transmission means being connected to said gyroscopic load cell whereby the resultant vertical force on said body at any liquid level is transmitted to said gyroscopic load cell which is calibrated to take account of said known relationship and to express said resultant vertical force as a weight of the liquid, and
- a servo-operable valve controlling the level of the liquid in said container, said gyroscopic load cell being operatively connected to control said servo-operable valve and being arranged to cause said servo-operable valve to close when the weight of liquid in said container has changed by a predetermined amount.
2 more elements
A liquid volume measuring device comprising:
- a container for receiving the liquid of which the volume is to be measured;
- a body positioned within said container;
- a force transmission means retaining said body in a predetermined vertical position within said container irrespective of the liquid level in said container whereby said body is progressively immersed in the liquid when liquid is added to said container and said body progressively emerges from the liquid when liquid is withdrawn from said container, the cross-sectional area of said body at any liquid level within the operational range of the liquid volume measuring device having a known relationship with the cross-sectional area of said container at the same liquid level,
- a gyroscopic load cell which measures applied forces without relative movement of said forces, said force transmission means being connected to said gyroscopic load cell whereby the resultant vertical force on said body at any liquid level is transmitted to said gyroscopic load cell which is calibrated to take account of said known relationship and the density of the fluid thereby to express said resultant vertical force as a volume of the liquid, and
- a servo-operable valve controlling the level of the liquid in said container, said gyroscopic load cell being operatively connected to control said servo-operable valve and being arranged to cause said servo-operable valve to close when the volume of liquid in said container has changed by a predetermined amount.
2 more elements
Dependencies are inferred from the claim text.