Flow measuring device

Claim 1

IN A DEVICE FOR MEASURING FLOW, THE COMBINATION COMPRISING AN OUTPUT SHAFT WHICH IS ROTATED RESPONSIVELY TO SAID FLOW, MEANS ROTABLY DRIVEN BY SAID OUTPUT SHAFT AND HAVING SUPPORT BEARINGS FOR MOUNTING SAID MEANS, A DISK INCLUDING A TOOTHED OUTER PERIPHERY AND CARRIED BY SAID ROTATABLE MEANS, A MAGNET DISPOSED AT ONE SIDE OF SAID DISK, AND FRICTION MEANS ENGAGING THE SIDE OF SAID DISK OPPOSITE FROM SAID MAGNET TO RETARD ROTATION OF SAID DISK, MEANS FOR BIASING SAID FRICTION MEANS WITH A PRESELECTED NORMAL FORCE AGAINST THE OPPOSED SURFACE OF SAID DISK, A FLUX RESPONSIVE MEANS DISPOSED RADIALLY OUTWARDLY FROM SAID DISK AND MOVABLE ADJUSTABLY TOWARD OR AWAY FROM THE OUTER PERIPHERY OF SAID DISK TO SENSE VARIATION OF FLUX BETWEEN SUCCESSIVE TEETH ON THE OUTER PERIPHERY OF SAID ROTOR AND WHICH ARE SPACED AT REGULAR INTERVALS ABOUT THE PERIPHERY OF SAID DISK, A COIL IN COMBINATION WITH SAID FLUX RESPONSIVE MEANS FOR GENERATING A PULSATING VOLTAGE THEREIN HAVING AMPLITUDE WHICH VARIES IN RESPONSE TO THE VARIATION IN FLUX, AND CONDUCTOR MEANS FOR RECEIVING THE VOLTAGE IMPULSES OF SAID COIL AND PROVIDING A MEASUREMENT OF THE ROTATION OF SAID DISK WHICH IS EFFECTED BY SAID FLOW.