Beta ray hydrogen density indicator

Claim 1

AN APPARATUS FOR INKICATNG HYDROGEN DENSITY BY PHYSICAL ANALYSIS OF SUBSTANCES WHICH INCLUDES A RADIATION SOURCE, A SINGLE RADIATION DETECTOR SPACED FROM SAID SOURCE, A SAMPLE CELL AND A REFERENCE CELL INTERPOSED SAID SOURCE AND SAID DETECTOR, SAID CELLS BEING ARRANGED ADJACENT EACH OTHER IN SUBSTANTIALLY THE SAME PLANE, A SLOTTED AND ROTATABLE CYLINDRICAL SHUTTER MEANS INTERPOSED SAID CELLS AND SAID SOURCE, A LIGHT SOURCE WITHIN SAID SHUTTER MEANS, A PAIR OF PHOTOTUBES SPACED ON OPPOSITE SIDES OF SAID ROTATABLE SHUTTER MEANS, A LIGHT GATE IN SAID SHUTTER MEANS REGISTERABLE WITH SAID LIGHT SOURCE AND SAID PHOTOTUBES TO ALTER NATELY ILLUMINATE ONE OF SAID PHOTOTUBES, NULL METER MEANS FOR THE OUTPUT OF SAID DETECTOR, SAID PHOTOTUBES BEING IN CIRCUIT WITH SAID METER MEANS AND ADAPTED TO INDICATE WHICH OF SAID CELLS IS EXPOSED TO SAID SOURCE AT A GIVEN POINT IN THE ROTATION OF SAID SHUTTER MEANS, A WEDGE MEANS INTERPOSED ONE OF SAID CELLS AND SAID SOURCE, SAID WEDGE MEANS EXTENDING INTO THE BEAM FROM SAID SOURCE TO SAID SINGLE DESTECTOR, AND MICROMETER MEANS FOR INDICATING THE RELATIVE POSITION OF SAID WEDGE.