Method of covering the surfaces of objects with protective glass jackets and the objects produced thereby

Claim 1

THE METHOD OF COVERING A SURFACE OF A DEVICE WITH A PROTECTIVE GLASS JACKET COMPRISING: COATING SAID SURFACE WITH A LAYER OF AN OXIDE SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDE AND BISMUTH TRIOXIDE; COVERING SAID OXIDE LAYER WITH A LAYER OF POWDERED BOROSILICATE GLASS, SAID GLASS AND THE MATERIAL OF SAID DEVICE HAVING THERMAL COEFFICIENTS OF EXPANSION IN THE SAME GENERAL RANGE; AND HEATING SAID LAYERS TO A TEMPERATURE SUFFICIENT TO CAUSE SAID GLASS TO FLOW AND COAT SAID SURFACE OF SAID DEVICE WITH A CONTINUOUS LAYER OF GLASS, SAID OXIDE LAYER FUNCTIOING TO IMPROVE THE SPREADING AND THE SMOOTHNESS OF SAID GLASS LAYER AT SAID TEMPERATURE, WHICH TEMPERATURE IS LOWER THAN THAT TEMPERATURE REQUIRED TO COVER SAID SURFACE IN THE ABSENCE OF SAID OXIDE LAYER.