Electromagnetic open-circuit spirometer
阅读：42发布：2021-01-02
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1. IN A SPIROMETER, IN COMBINATION, A CONDUIT HAVING TWO OPEN ENDS AND A MOUTHPIECE ON ONE OF SAID ENDS; TWO PITOT TUBES IN SAID CONDUIT RESPECTIVELY FACING SAID ENDS; A SUBSTANTIALLY CLOSED CHAMBER; A MOVABLE WALL IN SAID CHAMBER AND DIVIDING THE SAME INTO TWO CELLS, EACH OF SAID CELLS COMMUNICATING WITH ONE OF SAID PITOT TUBES; A SUPPORT; A TUBULAR BODY HAVING A LONGITUDINAL AXIS, ONE AXIAL END PORTION OF SAID TUBULAR BODY BEING SECURED TO SAID SUPPORT; LINKAGE MEANS CONNECTING SAID WALL TO THE OTHER AXIAL END PORTION OF SAID TUBULAR BODY FOR STRESSING SAID BODY IN TORSION ABOUT THE LONGITUDINAL AXIS THEREOF WHEN SAID WALL MOVES; A FIRST ELONGATED CONDUCTOR SUBSTANTIALLY COAXIALLY WOUND ON SAID BODY; A SECOND ELONGATED CONDUCTOR TOROIDALLY WOUND ON SAID BODY, EACH OF SAID CONDUCTORS HAVING TWO TERMINAL PORTIONS; A SOURCE OF ALTERNATING CURRENT IN CIRCUIT WITH THE TERMINAL PORTIONS OF
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