Arrangement for indicating functional disturbances in a living body

Claim 1

AN ARRANGEMENT FOR INDICATING FUNCTIONAL DISTURBANCES IN A LIVING BODY, PARTICULARLY OF MINING PERSONNEL WORKING UNDERGROUND, COMPRISING, IN COMBINATION A HOUSING MEANS HAVING A WIDER OUTER PORTION OF A GIVEN DIAMETER ADAPTED TO BE SEATED IN THE CONCHA OF THE EAR AND AN ELONGATED NARROWER INNER PORTION OF A DIAMETER LESS THAN SAID GIVEN DIAMETER, ONLY SAID ELONGATED INNER PORTION BEING ADAPTED TO BE FITTED INTO THE AUDITORY CANAL OF AN EAR SO AS TO BE WORN ON A LIVING BEING, SAID HOUSING BEING CLOSED AT ITS OUTER END FOR PREVENTING INTRUSION OF AMBIENT AIR INTO THE AUDITORY CANALS AND FORMING A COMPARTMENT; ELECTRIC TEMPERATURE DETECTOR MEANS ARRANGED IN SAID COMPARTMENT IN SUCH A MANNER THAT WHEN SAID NARROWER INNER PORTION IS DISPOSED IN THE AUDITORY CANAL OF AN EAR SAID TEMPERATURE DETECTOR MEANS IS EXPOSED TO THE BODY TEMPERATURE ONLY, AND IS PROTECTED FROM THE TEMPERATURE OF THE AMBIENT AIR OUTSIDE THE AUDITORY CANAL, SAID TEMPERATURE DETECTOR MEANS HAVING AN ELECTRIC CHARACTERISTIC WHICH CHANGES WITH CHANGES OF THE TEMPERATURE TO WHICH IT IS EXPOSED; AND ELECTRIC SIGNALING MEAN COMPRISING AN ACOUSTICAL SIGNAL ISSUING MEANS ARRANGED ALSO IN SAID COMPARTMENT OF SAID HOUSING MEANS FOR GIVING WHEN ACTUATED AN ACOUSTICAL SIGNAL TO BE HEARD ONLY BY SAID LIVING BEING WHO WEARS SAID HOUSING MEANS AND SIGNAL PRODUCING ELECTRIC CIRCUIT MEANS ACTUATING SAID SIGNAL ISSUING MEANS AND CONNECTED WITH SAID DETECTOR MEANS FOR PRODUCING A SIGNAL WHEN SAID TEMPERATURE EXCEEDS A PREDETERMINED VALUE AND ACCORDINGLY SAID ELECTRIC CHARACTERISTIC ASSUMES A PREDETERMINED VALUE.