Grain temperature sensing device

Claim 1

APPARATUS FOR SENSING THE TEMPERATURE OF GRAIN AND THE LIKE STORED IN BINS, COMPRISING ARIGID TUBULAR PROBE HAVING A LOWER END TO E MOVED INTO THE GRAIN AND HAVING AN UPPER END, THE LOWER END HAVING AN UPRIGHT PERIPHERAL WALL WITH AN OPOENING THEREIN TO PERMIT INFLOW OF AIR, A HEAT-INSULATING BLOCK IN THE TUBULAR PROBE AND HAVNG AN AIR FLOW PASSAGE THEREIN AND COMMUNICATING WITH THE OPENING IN SAID PROE, A POINTED TIP AFFIXED ON THE LOWER END OF THE TUBULAR PROBE BELOW SAID OPENING AND BELOW SAID BLOCK, SAID TIP CLOSING THE LOWER END OF THE TUBULAR PROBE, A TEMPERATURE-SENSING ELEMENT MOUNTED IN THE BLOCK IN THE PASSAGE THEROE,F A SCREEN PREVENTING GRAIN FROM TRAVELING THROUGH THE PASSAGE IN THE BLOCK TOWARD THE TEMPERATURE-SENSING ELEMENT, ELECTRIC CIRCUIT MEANS CONNECTED WITH SAID TEMPERATURE-SENSING ELEMENT AND INCLUDING MEANS OF PRODUCING AN INDICATION IN RESPONSE TO A SENSED TEMPERATURE BY SAID ELEMENT, AND MEANS CONNECTED WITH THE UPPER END OF THE TUBULAR PROBE FOR MOVING AIR UPWARDLY OUT OF THE PROBE AND TO THEREBY DRAW AIR FROM THE GRAIN OVER SAID TEMPERATURE-SENSING ELEMENT.