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US 4,067,381 AGranted
Temperature compensated quantity indicator
AssigneeUnited Aircraft Products, Inc.
InventorThomas J. Lord
Life of this patent
Estimating the term…
Abstract
Apparatus indicating the quantity of fluid in a closed and pressurized fluid circulating system. The apparatus compensates or corrects for fluid expansion and contraction due to temperature change so that the indicated quantity is the true quantity. The apparatus includes a direct acting, mechanical connection from a fluid accumulator-reservoir device to an indicator. A thermostat sensing fluid temperature introduces a correction into the mechanical connection.
Claims10
In a system circulating a fluid coolant;
- a. an accumulator-reservoir device communicating with the system and having a pressure applying piston a position of which in the device is effected by changing system quantity and by fluid expansion and contraction due to temperature change,
- b. means positionable to indicate the quantity of fluid coolant in the system,
- c. a mechanical connection from said piston to said indicating means translating movement of said piston into adjustment in the position of said indicating means,
- d. thermal means sensing temperature change in the fluid coolant, and
- e. means operated from said thermal means introducing a correction in said connection so that movement of said piston resulting from temperature change is not translated into adjustment in the position of said indicating means.
2 more elements
In a system circulating a fluid coolant;
- a. an accumulator-reservoir device communicating with the system and having a pressure applying piston a position of which in the device is affected by changing system quantity and by fluid expansion and contraction due to temperature change,
- b. a positionable part movable in opposite directions and means utilizing movement of said part in at least one direction to indicate a changed fluid quantity condition in the system,
- c. a mechanical connection from said piston to said positionable part translating movement of said piston into movement of said part,
- d. thermal means sensing temperature change in the fluid coolant, and
- e. means operated from said thermal means introducing a correction in said connection so that movement of said piston resulting from temperature change is not translated into movement of or adjustment in the position of said positionable part.
2 more elements
Dependencies are inferred from the claim text.