Device for inspection of the interior of hollow bodies

Claim 1

AN INSPECTION INSTRUMENT FOR INSERTION INTO A HOLLOW BODY TO ENABLE VIEWING OF THE INTERIOR THEREOF, SAID INSPECTION INSTRUMENT COMPRISING: A HOUSING HAVING A LONGITUDINAL AXIS, A SOURCE OF LIGHT ATTACHED TO SAID HOUSING AND POSITIONED AT AN ANGLE TO THE LONGITUDINAL AXIS OF SAID HOUSING, A FIRST REFLECTOR POSITIONED WITHIN SAID HOUSING AT AN ANGLE TO SAID SOURCE OF LIGHT AND IN ALIGNMENT THEREWITH FOR PROJECTING LIGHT FROM THE SAID SOURCE OF LIGHT AS A BEAM EXTENDING ALONG THE LONGITUDINAL AXIS OF SAID HOUSING, A TELESCOPE ATTACHED TO SAID HOUSING IN COAXIAL RELATION TO THE LONGITUDINAL AXIS OF SAID HOUSING, A HEAD ROTATABLY MOUNTED ON SAID HOUSING IN OPPOSITELY DISPOSED RELATION TO SAID TELESCOPE, AN ELONGATGED TUBE ATTACHED TO SAID HEAD AND HAVING A LONGITUDINAL AXIS COAXIAL WITH THE LONGITUDINAL AXIS OF SAID HOUSING, SAID TUBE HAVING AN EXTENDED SLOT THEREIN, A CARRIAGE POSITIONED WITHIN SAID TUBE, A SECOND REFLECTOR MOUNTED ON SAID CARRIAGE IN ANGULAR RELATION TO THE LONGITUDINAL AXIS OF SAID TUBE AND DIRECTED TOWARD THE EXTENDED SLOT IN SAID TUBE IN OPPOSING RELATION TO SAID FIRST REFLECTOR, AND MEANS FOR MOVING SAID CARRIAGE AND SAID SECOND REFLECTOR MOUNTED THEREON AXIALLY WITHIN SAID TUBE THROUGH A DISTANCE TRAVERSING THE ENTIRE LENGTH OF THE EXTENDED SLOT IN SAID TUBE, THE BEAM OF LIGHT PROJECTED FROM SAID FIRST REFLECTOR BEING DIRECTED AGAINST SAID SECOND REFLECTOR SO THAT SAID SECOND REFLECTOR TRANSMITS LIGHT THROUGH THE EXTENDED SLOT IN SAID TUBE TO ILLUMINATE THE REGION OUTSIDE OF SAID TUBE AND ADJACENT THE EXTENDED SLOT THEREIN, WHEREBY SAID TELESCOPE CAN BE FOCUSED FOR OBSERVING THE ILLUMINATED REGION WITH LIGHT REFLECTED FROM SAID SECOND REFLECTOR.