Air cooled lamp handle and diagnostic instrument combination

Claim 1

IN COMBINATION, A HOLLOW HANDLE HOUSING AND A DIAGNOSTIC INSTRUMENT, SAID INSTRUMENT HAVING LIGHT CONDUCTING MEANS THEREIN FOR TRANSMITTING LIGHT TO THE DISTAL END OF THE INSTRUMENT, THE INSTRUMENT HAVING A POLYGONAL STEM PROJECTING THEREFROM FOR SUPPORTING THE INSTRUMENT AND ENCLOSING THE PROXIMAL END OF THE LIGHT TRANSMITTING MEANS, THE LIGHT-RECEIVING SURFACE OF SAID MEANS BEING EXPOSED AT THE END OF THE STEM, SAID HOUSING HAVING A SOCKET RECEIVING AND RELEASABLY SECURING SAID STEM WITHIN THE HOUSING, THE SOCKET HAVING A POLYGONAL CROSS-SECTIONAL CONFIGURATION CORRESPONDING TO THAT OF THE STEM FOR ORIENTING THE INSTRUMENT IN THE HOUSING, AN ELECTRICALLY POWERED LAMP SECURED WITHIN THE HOUSING ADJACENT SAID SOCKET, THE HOUSING HAVING A CONTINUOUS LIGHT PASSAGE BETWEEN THE LAMP AND THE SOCKET FOR ILLUMINATION OF SAID EXPOSED SURFACE WHEN THE STEM IS IN THE SOCKET, AND AN ELECTRICALLY POWERED FAN IN SAID HOUSING FOR DRAWING AIR OVER SAID STEM AND THROUGH SAID HOUSING TO PREVENT HEATING OF THE INSTRUMENT HOUSING; AND SOCKET AND STEM HAVING COOPERATING SPRING BIASED DETENT MEANS FOR DETACHABLY SECURING THE STEM IN THE SOCKET.