Electric lamp base end structure

Claim 1

AN ELECTRICAL DEVICE COMPRISING A SEALED GLASS ENVELOP PROVIDED WITH A PROTRUDING FLAT STEM PRESS PORTION OF SOLID GLASS HAVING A CHANNELWAY IN AT LEAST ONE OF ITS FLAT SIDES EXTENDING THEREALONG FROM ITS OUTER END, A LEAD-IN CONDUCTOR SEALED INTO SAID STEM PRESS PORTION AND PROTUDING ENDWISE THEREFROM, SAID CONDUCTOR BEING BENT AROUND THE OUTER END OF SAID STEM PRESS PORTION AND LYING FLAT AGAINST ONE OF THE SAID FLAT SIDES THEREOF WITHIN THE SAID CHANNELWAY THEREIN SO AS TO LIE BELOW THE SURFACE OF THE SAID ONE FLAT SIDE AND FORM A TERMINAL CONTACT FOR THE DEVICE, AND A BASE MOUNTED ON SAID STEM PRESS PORTION AND COMPRISING A SPRING METAL BAND OF OPEN RING SHAPE CIRCUMPOSED ABOUT SAID STEM PRESS PORTION AND HAVING ITS ENDS INTURNED TO EXTEND APPROXIMATELY DIAMETRICALLY OF THE RING-SHAPED BASE AND FORM RESILIENT SPRING FINGER PORTIONS DISPOSED PARALLEL TO ONE ANOTHER IN OPPOSED SPACED RELATION AND BETWEEN WHICH THE SAID FLAT STEM PRESS PORTION IS RECEIVED AND RESILIENTLY CLAMPED TIGHTLY IN FLATWISE POSTION THEREBETWEEN, ONE OF SAID FINGER PORTIONS HAVING A PROTUBERANCE ON ITS CONTACT FACE SNAP-LOCKED WITHIN THE SAID CHANNELWAY IN SAID STEM PRESS PORTION TO HOLD THE BASE SECURELY IN PLACE THEREON AGAINST SIDEWISE REMOVAL THEREFROM AND FIRMLY ENGAGE WITH THE SAID CONDUCTOR IN SAID CHANNELWAY TO FORM A GOOD ELECTRICAL CONNECTION THEREWITH.