Sealed beam headlamps with a reflective safety ring

Claim 1

A LAMP FOR VEHICLES COMPRISING A HERMETICALLY SEALED BULBOUS BODY, A PARABOLIC PRIMARY REFLECTOR INCLUDING A VERTEX PROVIDING A PRINCIPAL FOCUS OF SAID REFLECTOR AT ONE AXIAL END THEREOF, SAID REFLECTOR HAVING AT ITS OPPOSITE AXIAL END AN OUTER CIRCUMFERENTIAL EDGE PORTION, A SOURCE OF LIGHT MEANS AT THE PRINCIPAL FOCUS OF SAID REFLECTOR AT SAID ONE AXIAL END THEREOF, A LENS CLOSING SAID OPPOSITE AXIAL END OF THE PRIMARY PARABOLIC REFLECTOR AND INTEGRALLY SEALED THERETO AT ITS CIRCUMFERENTIAL EDGE PORTION PROVIDING SAID HERMETICALLY SEALED BULBOUS BODY, SAID LENS HAVING A SMOOTH OUTER FACE AND HAVING AN ANNULAR PLANAR BAND AT A CIRCUMFERENTIAL EDGE PORTION OF ITS INNER FACE, SAID BAND HAVING A MULTIPLICITY OF SELFFOCUSING SECONDARY REFLECTOR UNITS INTEGRAL WITH THE INNER FACE, OF SAID LENS AND PROTECTIVELY ENCASED WITHIN SAID BULBOUS BODY AND WITHIN THE DIAMETER OF THE PLANE OF SAID OUTER CIRCUMFERENTIAL EDGE PORTION OF SAID PRIMARY REFLECTOR, THE AREA OF THE LENS WITHIN SAID BAND BEING AT LEAST PARTIALLY PERMEABLE BY RAYS OF SAID LIGHT SOURCE.