Vibration pickup
First Claim
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1. A VIBRATION PICKUP COMPRISING A CYLINDRICAL COIL FORM WITH AN AXIAL BORE, A PICKUP COIL WOUND ON SAID COIL FORM, A SLEEVE OF PARAMAGNETIC MATERIAL SURROUNDING SAID PICKUP COIL AND CENTERED BETWEEN THE ENDS THEREOF, A BAR MAGNET OF LESSER LENGTH THAN SAID COIL FORM DISPOSED IN SAID BORE SO AS TO BE SPRING-COUPLED MAGNETICALLY TO SAID SLEEVE WITH NO STRUCTURAL CONNECTION THEREBETWEEN FOR AXIAL MOVEMENT WITHIN SAID BORE, MEANS FOR ESTABLISHING ELECTRICAL CONNECTION TO SAID PICKUP COIL, AND MEANS FOR COUPLING SAID COIL FORM TO A VIBRATING OBJECT, SAID PICKUP COIL BEING ARRANGED TO GENERATE A SIGNAL VOLTAGE WITHIN GIVEN LIMITS OF FREQUENCY AND DISPLACEMENT WHICH IS DIRECTLY PROPORTIONAL TO THE VELOCITY OF MOVEMENT OF THE OBJECT.
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1 Claim
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1. A VIBRATION PICKUP COMPRISING A CYLINDRICAL COIL FORM WITH AN AXIAL BORE, A PICKUP COIL WOUND ON SAID COIL FORM, A SLEEVE OF PARAMAGNETIC MATERIAL SURROUNDING SAID PICKUP COIL AND CENTERED BETWEEN THE ENDS THEREOF, A BAR MAGNET OF LESSER LENGTH THAN SAID COIL FORM DISPOSED IN SAID BORE SO AS TO BE SPRING-COUPLED MAGNETICALLY TO SAID SLEEVE WITH NO STRUCTURAL CONNECTION THEREBETWEEN FOR AXIAL MOVEMENT WITHIN SAID BORE, MEANS FOR ESTABLISHING ELECTRICAL CONNECTION TO SAID PICKUP COIL, AND MEANS FOR COUPLING SAID COIL FORM TO A VIBRATING OBJECT, SAID PICKUP COIL BEING ARRANGED TO GENERATE A SIGNAL VOLTAGE WITHIN GIVEN LIMITS OF FREQUENCY AND DISPLACEMENT WHICH IS DIRECTLY PROPORTIONAL TO THE VELOCITY OF MOVEMENT OF THE OBJECT.
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Current AssigneeJohn E. Judd, Thomas C. Warner Jr
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Original AssigneeJohn E. Judd, Thomas C. Warner Jr
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InventorsWarner, Thomas C. Jr., Judd, John E.
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Application NumberUS04/001,370Time in Patent Office1,306 DaysField of SearchUS Class Current367/185CPC Class CodesG01H 11/02 by magnetic means, e.g. rel...
