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Electropneumatic Transducer

IP.com Disclosure Number: IPCOM000076373D
Original Publication Date: 1972-Feb-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Kelly, DL: AUTHOR [+2]

Abstract

Conversion of minute, finite pneumatic pressure changes to analog electrical signals of high accuracy is provided by this transducer.

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Electropneumatic Transducer

Conversion of minute, finite pneumatic pressure changes to analog electrical signals of high accuracy is provided by this transducer.

A metallic diaphragm 1 is sandwiched between nonmetallic blocks 2 and 3 containing uniform cavities 4 and 5 of known volume. An eddy-current proximity probe 6 is adjustably positioned in one block.

An adjusting screw 7 and spring 8 are positioned in the other block opposite the probe. Pneumatic pressure is introduced into one side of the diaphragm via opening 9.

In operation the probe is adjusted to provide readings within the linear range of the electronic measuring system to which it is connected. Concurrently adjustments are made with the adjusting screw and spring to place the diaphragm near equilibrium for the pressure being used. Variations in the pressure sensed by the probe are transmitted to the recording means via an oscillator detector amplifier circuit.

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