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US 4,064,497 AGranted
Sensors for sensing a plurality of parameters
AssigneeIllinois Tool Works Inc.
InventorsEdward F. Sidor, Charles C. Camillo, Glenn W. Bowen
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AssigneeIllinois Tool Works Inc.
InventorsEdward F. Sidor, Charles C. Camillo, Glenn W. Bowen
Estimating the term…
Sensors, or transducers, which utilize elongated magnetically saturable tubes with sense lines that run through the tubes for simultaneous sensing of a plurality of parameters are disclosed. One version involves a single sensing element which has a first pair of diametrically disposed magnetic poles responsive to one condition that is positioned adjacent to one end of the tube and a second pair of diametrically disposed magnets responsive to another condition that is positioned adjacent to the other end of the tube. Another version involves two elements which have temperature vs. inductance characteristics which intersect, and a pair of diametrically disposed magnets responsive to another condition positioned adjacent the two elements.
A sensing device for sensing two independent conditions comprising an elongated magnetically responsive element, first elongated magnet means positionable adjacent a first portion of said element so as to create a response by said element that is dependent upon a first amount of said element that is adjacent said magnetic means, first control means responsive to a first condition for positioning said first magnet means relative to said responsive element, second elongated magnet means positionable adjacent a second portion of said element so as to create a response by said element that is dependent upon a second amount of said element that is adjacent said magnet means and second control responsive to a second condition for positioning said second magnet means relative to said responsive element.
A sensing device for sensing two independent conditions, comprising an elongated, hollow tube having an elongated axis and constructed of material which is magnetically saturable, electrical conductor means comprising at least one sense wire which passes through said tube in a direction substantially parallel to the elongated axis of said tube, a first pair of elongated opposite magnetic poles diametrically opposed adjacent one end of the outer periphery of said tube which substantially completely magnetically saturate a first portion of said tube which is disposed intermediate said first pair of magnetic poles but which are substantially ineffective in magnetically saturating the remaining portion of said tube, a first control means responsive to a first condition for positioning said first pair of magnetic poles relative to said tube, a second pair of opposite magnetic poles diametrically opposed across said tube adjacent the other end of the outer periphery of said tube which substantially completely magnetically saturate a second portion of said tube which is disposed intermediate said second pair of magnetic poles but which are substantially ineffective in magnetically saturating the remaining portion of said tube.
A sensing device as claimed in claim 5 wherein said first and said second control means are both pressure responsive means. 8. A sensing device as claimed in claim 5 wherein said first control means is a temperature responsive means and said second control means is a pressure
Dependencies are inferred from the claim text.