Non-shorting photoflash lamp
AssigneeGeneral Electric Company
InventorsRobert M. Anderson, John C. Sobieski
Life of this patent
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Abstract
A glass support bead through which inlead wires extend in a miniature type of flash lamp is shaped to have sloping sides and a narrow ridge at the top extending from one to the other of the inlead wires, so that any unburned metal foil in a flashed lamp is not likely to accumulate on the top of the bead so as to cause an electrical short between the inlead wires.
Claims7
A miniature photoflash lamp comprising a bulb having an enclosed volume of less than two cubic centimeters and containing combustible metal and combustion-supporting gas, a pair of inlead conductors extending into said bulb through a base thereof, and flash ignition means connected across said inleads within said bulb, wherein the improvement comprises a support bead positioned in said bulb at a location between said base and said ignition means, said inleads extending through said support bead, said support bead having substantially flat sloping sides which slope relatively farther apart from each other toward the direction of said base and terminating at the upper edges thereof in a ridge extending from one to the other of said inlead wires, said ridge having a width no greater than the cross-section of said inleads.
Dependencies are inferred from the claim text.