Electric lamp and discharge devices – With gas or vapor – Incandescent filament lamp
Patent
1983-11-22
1986-08-19
Ramsey, Kenneth J.
Electric lamp and discharge devices
With gas or vapor
Incandescent filament lamp
313318, 445 3, 445 27, H01J 934
Patent
active
046071920
ABSTRACT:
The invention provides an improved method of construction of a prefocus lamp, to improve positioning of the filament relative to the lamp cap, and a lamp so made. The lamp envelope has a pinch seal with V-shaped grooves into which a resilient ring is sprung. This assembly is a sliding fit in the lamp cap and is slid therein to have substantially only line contact between the ring and the cap. The envelope can then be relatively easily rocked and otherwise moved in the lamp cap to be precisely positioned. When the positioning is complete solder previously placed in the cap is melted, the position being such that it flows over the ring and fixes the ring to the lamp cap.
REFERENCES:
patent: 1760693 (1930-05-01), Gustin
patent: 1813572 (1931-07-01), Gustin
patent: 3188728 (1965-06-01), Perrin
patent: 4496874 (1985-01-01), Sanders et al.
Billing Alfred G.
Burgess Norman
Ramsey Kenneth J.
Thorn Emi plc
LandOfFree
Pre-focussed incandescent lamps and method of assembling base th does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pre-focussed incandescent lamps and method of assembling base th, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pre-focussed incandescent lamps and method of assembling base th will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-395467