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US 4,271,859 AGranted
Temperature sensor
AssigneeUnited Technologies Corporation
InventorJoseph W. Lawsing
Life of this patent
Estimating the term…
Abstract
A pressure or temperature sensor that translates a pressure or temperature signal into a hydraulic pressure signal. The sensor or transducer utilizes no bearings, levers or pivots that would introduce errors and the control plate is supported within the casing only by bellows. The transducer has use in transmitting a hydraulic pressure signal to the fuel control in a gas turbine in response either to a pressure or temperature signal such as engine inlet temperature or compressor discharge pressure.
Claims9
A pressure transducer including:
- a casing having a hydraulic fluid inlet and outlet and a gas pressure inlet;
- a valve plate in said casing between said fluid inlet and outlet and having a fluid passage therein;
- a movable valve element in said casing cooperating with said plate to control the flow of fluid therethrough;
- a pair of bellows each secured at one end to and supporting said element with one bellows on each side of the plate and responsive to the fluid pressures on opposite sides of the plate;
- a second plate in said casing in parallel spaced relation to said valve plate and having an opening thereon through which a portion of the valve element extends;
- and
- a gas sensitive bellows also secured to said element and exposed to gas pressure from said gas inlet said gas bellows being located on the side of the second plate remote from the valve plate and the pair of bellows.
4 more elements
Dependencies are inferred from the claim text.