Apparatus for measuring kiln temperatures

Claim 1

THE COMBINATION, WITH A ROTARY KILN ADAPTED TO CONTAIN A LOAD WHICH PILES UP PAST THE BOTTOM AS THE KILN ROTATES, OF A TEMPERATURE MEASURING APPARATUS COMPRISING A PLURALITY OF TEMPERATURE SENSING ELEMENTS MOUNTED INSIDE THE KILN WALL AND SPACED BOTH LENGTHWISE OF THE KILN AND AROUND ITS CIRCUMFERENCE, A RECORDER ADAPTED TO BE CONNECTED SUCCESSIVELY TO EACH OF SAID ELEMENTS FOR RECORDING THE TEMPERATURE SENSED BY EACH IN TURN, A SWITCH LOCATED DIRECTLY UNDER THE BOTTOM OF SAID KILN, ACTUATING MEANS FOR SAID SWITCH, SAID ACTUATING MEANS BEING LOCATED ON THE OUTSIDE OF SAID KILN IN THE SAME RADIAL PLANES AS SAID ELEMENTS, AN ELECTRIC CONTROL CIRCUIT CONNECTING SAID SWITCH AND SAID RECORDER FOR OPERATING THE RECORDER ON ACTUATION OF THE SWITCH, SAID CIRCUIT INCLUDING ADJUSTABLE MEANS FOR DELAYING OPERATION OF SAID RECORDER FOLLOWING EACH ACTUATION OF SAID SWITCH UNTIL THE KILN ROTATES THROUGH A PREDETERMINED ARC TO ASSURE THAT THE LOAD OVERLIES THE RESPECTIVE ELEMENT, AND MEANS OPERATIVELY CONNECTED WITH SAID KILN AND WITH SAID DELAYING MEANS FOR AUTOMATICALLY ADJUSTING THE LATTER IN ACCORDANCE WITH THE SPEED OF ROTATION OF THE KILN TO MAINTAIN THE SAME ARC DESPITE VARIATIONS IN KILN SPEED.