Meter for optically measuring fluid current velocity

Claim 1

A METER FOR MEASURING THE VELOCITY OF A CURRENT OF FLUID MATERIAL COMPRISING AN ENCLOSURE STRUCTURE HAVING AN OPENING AT ITS BOTTOM, MEANS ROTATABLY SUPPORTED WITHIN SAID ENCLOSURE, A SURFACE ON SAID ROTATABLE MEANS HAVING ATTACHMENT THERETO A PLURALITY OF REFLECTIVE SURFACES ARRANGED IN A CIRCULAR PATTERN, EACH SAID REFLECTIVE SURFACE BEING SPACED AT EQUAL DISTANCES FROM THE AXIS OF ROTATION OF SAID ROTATABLE MEANS, A FACING AWAY THEREFROM, A SIGHTING MEANS FIXED IN SAID ENCLOSURE, AND IN POSITION TO ALLOW A VIEW THERETHROUGH OF REFLECTIVE SURFACES FACING THE SAID OPENING IN THE ENCLOSURE STRUCTURE, A VARIABLE SPEED DRIVING MEANS AND SPEED CONTROL MEANS THEREFOR, A SPEED RESPONSIVE ELECTRICAL GENERATOR AND A SPEED INDICATOR ELECTRICALLY CONNECTED TO RECEIVE THE OUTPUT OF SAID GENERATOR, AN ASSEMBLY OF DRIVE TRANSMITING ELEMENTS SUPPORTED FOR ROTATION WITHIN SAID ENCLOSURE STRUCTURE, AND OPERABLY ENGAGED WITH THE SPEED CONTROLLED DRIVING MEANS TO TRANSMIT A ROTATIONAL DRIVE TO SAID GENERATOR AND TO SAID ROTATABLE MEANS, SAID DRIVE TRANSMITTING ELEMENTS COMPRISING ANGULAR MOTION COMPENSATING ELEMENTS CONNECTED BETWEEN SAID DRIVING MEANS AND A DRIVE TRANSMITTING ELEMENT ENGAGING SAID ROTATABLE MEANS, WHEREBY AND ANGULAR VELOCITY OF SAID ROTATABLE MEANS IS REPEATEDLY VARIED IN A CYCLIC MEANNER.