Burning and collection apparatus for combustion gases

Claim 1

A BURNING AND COLLECTION APPARTUS FOR COMBUSTION GASES, COMPRISING COMBUSTION MEANS HAVING A COMBUSTION CHAMBER FOR PLACING SAMPLE MATERIAL THEREIN AND AN ELECTRIC HEATING FURNACE CAPABLE OF ADJUSTABLY HEATING SAID COMBUSTION CHAMBER, GAS SUPPLY MEANS FOR SUPPLYING AIR OR OTHER GAS INTO THE COMBUSTION CHAMBER AT AN ADJUSTABLE RATE, PISTON-CYLINDER TYPE GAS COLLECTION MEANS HAVING A CYCLINDER COMMUNICATING WITH THE COMBUSTION CHAMBER BY A GAS EXHAUST PASSING HAVING A COOLING EFFECT SUFFICIENT TO CONDENSE AQUEOUS VAPOR AND A PISTION DISPOSED SLIDABLY IN SAID CYLINDER, THE GAS BEING COLLECTED IN A COLLECTION CHAMBER DEFINED BY SAID PISTON AND THE INTERIOR OF SAID CYLINDER, DRIVING MEANS FOR CREATING RELATIVE MOVEMENT BETWEEN THE PISTON AND CYLINDER AT AN ADJUSTALE PREDETERMINED SPEED AND IN A DIRECTION CAUSING SUCTION OF THE COMBUSTION GASES NTO THE COLLECTION CHAMBER SO THAT SAID SUCTON IS AT A RATE CORRESPONDING TO THE SUPPLY RATE OF AIR OR OTHER GAS INTO THE COMBUSTION CHAMBER THE DIMENSIONS OF SAID CYLINDER AND PISTON BEING SUCH THAT SEALING IS CREATED BETWEEN SAID CYLINDER AN PISTON WHEREIN GAS IS ALLOWED TO FLOW INTO SAID COLLECTION CHAMBER BETWEEN SAID CYLINDER AND SAID PISTON TO ELIMINATE THE PRESSURE DIFFERENTIAL BETWEEN THE INTERIOR AND EXTERIOR OF SAID CYCLINDER CAUSED BY THE SU KING OF SAID COMBUSTION GASES BY SAID PISTON, AND WHEN COMBUSTION GASES ARE NOT BEING SUCKED, GAS FLOW BETWEEN SAID PISTON AND SAID CYLINDER IS PREVENTED.

Claim 6

A method of producing and collecting combustion gases comprising: heating sample material in a combustion chamber; supplying air or other gas at a predetermined and adjustable rate into said combustion chamber to burn the sample; removing moisture from the combustion gases produced in said combustion chamber which gases have exited through an outlet of said combustion chamber; and collecting said dehumidified combustion gases at substantially constant pressure and at a rate corresponding to the rate of supply of air or other gas into the combustion chamber, said collection taking place in a collection chamber defined by a movable piston and a cylinder having a seal between said piston and cylinder for maintaining substantially constant pressure in said collection chamber by allowing gases at atmospheric pressure to enter said collection chamber when suction is created therein by movement of said piston and preventing flow Of gas past said seal when said piston is stationary.

Claim 7

A method of producing and collecting combustion gases comprising: heating sample material in a combustion chamber; supplying air or other gas at a predetermined and adjustable rate into said combustion chamber to burn the sample; removing moisture from the combustion gases produced in said combustion chamber which gases have exited through an outlet of said combustion chamber; and collecting said dehumidified combustion gases at substantially constant pressure and at a rate corresponding to the rate of supply of air or other gas into the combustion chamber, said collection taking place in a collection chamber defined by a movable piston and a cylinder having a seal between said piston and cylinder for maintaining substantially constant pressure in said collection chamber by allowing gases at atmospheric pressure to enter said collection chamber when suction is created therein by movement of said piston and preventing flow Of gas past said seal when said piston is stationary.