Fluid-filled variable density polarizing sunglasses

Claim 1

A VARIABLE DENSITY SUNGLASS COMPRISING A FRAME PROVIDING RIGHT AND LEFT EYE APERTURES AND INCLUDING A BRIDGE PORTION, A FIRST LIGHT POLARIZING LENS FIXEDLY SECURED IN EACH OF SAID APERTURES, A SECOND LIGHT POLARIZING LENS ROTATABLY MOUNTED IN EACH OF SAID APERTURES AND SPACED FROM SAID FIRST LENS, A THIRD LENS FIXED Y SECURED IN EACH OF SAID FIRST LENS, THE SIDE OF SAID SECOND LENS OPPOSITE TO SAID FIRST LENS, SAID LENSES HAVING IDENTICAL INDICES OF REFRACTION, ADJUSTABLE MEANS MOUNTED IN SAID BRIDGE PORTION OF SAID FRAME AND BEING OPERABLY CONNECTED TO SAID SECOND LENS, WHEREBY SAID SECOND LENS MAY BE ROTATED RELATIVE TO SAID FIRST AND THIRD LENS, SAID FIRST AND THIRD LENSES WITH SAID FRAME DEFINING A CHAMBER, FLUID MEANS DISPOSED IN SAID CHAMBER AND IMMERSING SAID SECOND LENS, SAID FLUID HAVING A REFRACTIVE INDEX CLOSELY APPROXIMATING THE REFRACTIVE INDICES OF SAID LENSES, SAID BRIDGE PORTION INCLUDING A CAVITY IN COMMUNICATION WITH SAID FLUID CHAMBERS, SAID ADJUSTABLE MEANS COMPRISING AN ELONGATED MEMBER LONGITUDINALLY SLIDABLY DISPOSED IN THE CAVITY IN SAID BRIDGE PORTION OF SAID FRAME, SAID MEMBER HAVING END PORTIONS EXTENDING INTO SAID FLUID CHAMBER IN EACH OF SAID RIGHT AND LEFT APERTURES, MEANS SECURING EACH OF SAID END PORTIONS RESPECTIVELY TO ONE OF SAID SECOND LENSES, SEALING MEANS SECURED TO SAID ELONGATED MEMBER AND SAID FRAME WHEREBY THE CAVITY IN SAID BRIDGE PORTION IS ISOLATED FROM SAID FLUID CHAMBERS, SAID SEALING MEANS COMPRISING AN EXTENSIBLE FLEXIBLE TUBULAR SEAL IN EACH OF SAID FLUID CHAMBERS AND SURROUNDING A PORTION OF SAID END PORTIONS OF SAID MEMBER, EACH OF SAID SEALS HAVING ONE END SECURED TO SAID MEMBER AND THE OTHER END SECURED TO SAID FRAME ADJACENT TO THE JUNCTURE OF SAID CAVITY AND SAID CHAMBERS WHEREBY THE INTERIOR OF SAID TUBULAR SEALS IS IN COMMUNICATION WITH SAID CAVITY AND THE EXTERIOR OF SAID TUBULAR SEALS IS EXPOSED TO THE FLUID IN SAID CHAMBERS.