Medical headlight

Claim 1

A MEDICAL HEADLIGHT ADAPTED TO BE SECURED ON A HEADBAND, COMPRISING: A BASE OF ELECTRICALLY NON-CONDUCTIVE MATERIAL; A HOLLOW INNER HOUSING HAVING AN ELONGATED, AXIALLY EXTENDING LIGHT PASSAGE THERETHROUGH, SAID HOUSING BEING SECURED AT ONE END TO THE BASE; A CONDENSING LENS SECURED IN THE PASSAGE AT THE OTHER END OF THE HOUSING; A LIGHT SOURCE SECURED IN THE PASSAGE ADJACENT THE BASE; AN IRIS-DIAPHRAGM ASSEMBLY SECURED ACROSS THE PASSAGE BETWEEN THE SOURCE AND THE LENS THE ASSEMBLY HAVING AN APERTURE VARIABLE IN SIZE DISPOSED COAXIALLY WITHIN THE PASSAGE; THE INNER HOUSING HAVE A PLURALITY OF INTERNAL ANNULAR REFLECTIVE SURFACES BETWEEN THE BASE AND THE DIAPHRAGM INCLUDING A FIRST ELLIPTICALLY CURVED SURFACE AROUND THE SOURCE FOR REFLECTING LIGHT SUBSTANTIALLY AXIALLY FORWARD OF THE SOURCE TOWARD THE LENS, A SECOND SPHERICALLY CURVED SURFACE FORWARD OF THE SOURCE FOR REFLECTING LIGHT EMANATING NON-AXIALLY FORWARD FROM THE SOURCE BACK ON TO THE ELLIPTICAL SURFACE, AND A THIRD FRUSTO-CONICAL SURFACE FORWARD OF THE SPERICAL SURFACE FOR REFLECTING LIGHT EMANATING NON-AXIALLY FORWARD FROM THE SOURCE TOWARD THE DIAPHRAGM APERTURE; A TUBULAR OUTER HOUSING AROUND AND SPACED FROM THE INNER HOUSING, THE OUTER HOUSING BEING SECURED AT ONE END TO THE BASE AND SECURED AT ITS OTHER END COAXIALLY ABOUT THE FORWARD END OF THE INNER HOUSING; AND MEANS OPERABLE FROM OUTSIDE THE OUTER HOUSING FOR MANUALLY CONTROLLING THE SIZE OF THE DIAPHRAGM APERTURE.