发明授权
US4851733A Electric lamp having a metal foil with a convexly and concavely curved surface 失效
电灯具有凸面和凹曲面的金属箔

Electric lamp having a metal foil with a convexly and concavely curved
surface
摘要:
An electric lamp has elongated metal foils as a part of the current conductor lead-throughs. Each metal foil has major surfaces which meet one another along each opposing side edge of the foil at an acute angle. The metal foil has a cross-section transverse to the side edges. At least one of the major surfaces has a pair of concave curvature portions each adjoining a respective side edge, and a convex curvature portion extending between the pair of concave curvature portions.
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