Rotary kiln shell temperature scanning system

Claim 1

IN A ROTARY KILN SHELL TEMPERATURE SCANNING SYSTEM OF THE TYPE INCLUDING A RADIANT ENERGY DETECTOR, MEASURING AND RECORDING MEANS, AND ALARM MEANS ACTUATED WHEN A HOT SPOT IS DETECTED THE IMPROVEMENT OF MEANS TO PRODUCE A SCANNING ACTION BETWEEN SAID DETECTOR AND A PORTION OF THE KILN SHELL COMPRISING A REVERSIBLE MOTOR DRIVE UNIT, A PAIR OF LIMIT SWITCHES FOR SAID DRIVE UNIT CONTROLLING ACTUATION OF SAID UNIT THROUGH AN ANGLE OF ABOUT NINETY DEGREES, A CONTROL SWITCH FOR SAID DRIVE UNIT OPERATED BY ROTATION OF THE KILN TO INITIATE OPERATION OF SAID DRIVE UNIT DURING EACH REVOLUTION OF THE KILN, A SECOND CONTROL SWITCH OPERATED BY SAID DRIVE UNIT FOR PRODUCING AN INCREMENT OF ROTATION OF SAID DRIVE UNIT TO CAUSE ROTATION OF THE DETECTOR TO VIEW AN ADJACENT AREA OF THE KILN, ONE OF SAID LIMIT SWITCHES IN SAID DRIVE UNIT PRODUCING A CONTINUOUS REVERSE ROTATION THEREOF UNTIL STOPPED BY SAID OTHER LIMIT SWITCH TO RESTORE THE DETECTOR TO A STARTING POSITION, AND SWITCH MEANS DISCONNECTING THE OUTPUT OF THE RADIANT ENERGY DETECTOR FROM THE MEASURING MEANS DURING THE CONTINUOUS REVERSE ROTATION.