Radiator sight gauge

Claim 1

A NIPPLE ASSEMBLY CAPABLE OF BEING REMOVABLY ATTACHED ABOUT AN OPENING IN A WALL OF A LIQUID CONTAINER FROM THE EXTERIOR OF SAID CONTAINER, SAID NIPPLE ASSEMBLY INCLUDING A NIPPLE HAVING A BODY AND AN ANNULAR FLANGE PROJECTING RADIALLY OUTWARDLY FROM SAID BODY, SAID FLANGE INCLUDING FIRST OPPOSED EDGE PORTIONS OF A DIAMETER LESS THAN THE DIAMETER OF SAID OPENING IN SAID WALL AND SECOND OPPOSED EDGE PORTIONS OF A DIAMETER GREATER THAN THE DIAMETER OF SAID OPENING IN SAID WALL, WHEREBY SAID FLANGE MAY BE PASSED THROUGH SAID OPENING IN SAID WALL FROM THE EXTERIOR OF SAID CONTAINER BY POSITIONING SAID FIRST OPPOSED EDGE PORTIONS ADJACENT OPPOSED EDGE PORTIONS OF SAID OPENING IN SAID WALL, MEANS FOR REMOVABLY SECURING SAID NIPPLE BODY IN SAID OPENING AND EXTENDING EXTERIORLY OF SAID CONTAINER AND WITH THE PORTIONS OF SAID FLANGE ADJACENT SAID SECOND OPPOSED EDGE PORTIONS OF SAID FLANGE BEARING AGAINST THE SURFACE OF SAID WALL ADJACENT SAID OPENING AND DEFINING AN ANNULAR SPACE BETWEEN SAID BODY AND SAID EDGE OF SAID OPENING, RESILIENT SEALING MEANS IN SAID ANNULAR SPACE, MEANS FOR COMPRESSING SAID SEALING MEANS AGAINST SAID FLANGE TO CAUSE IT TO BULGE AND BEAR AGAINST SAID EDGE OF SAID WALL DEFINING SAID OPENING AND SAID SURFACE OF SAID BODY, AND TRANSPARENT CAP MEANS IN THREADED ENGAGEMENT WITH SAID NIPPLE BODY FOR SHOWING THE PRESENCE OF LIQUID IN SAID NIPPLE BODY AND THEREBY IN SAID CONTAINER.