Photoflash lamp and method of making same

Details Photoflash lamp and method of making same Photoflash lamp and method of making same

1975-11-24

1977-02-15

Cohan, Alan

Combustion

Projector and igniter for liquid or gelled fuel slug or rod,...

431 95R, F21K 502

Patent

active

040080404

ABSTRACT:
A high-voltage type photoflash lamp filled with a filamentary combustible material and oxygen and having an ignition structure comprising a pair of spaced apart lead-in wires bridged at their inner ends by a mass of primer material. An insulating sleeve encloses one of the wires, with the inner end of that wire and the top of the sleeve having a melted down configuration with a smooth and rounded surface. The other lead-in wire lies outside the sleeve and is formed to terminate and make contact with the exterior of the sleeve at or near its top end. The primer material is disposed to cover the top end of the sleeve and bridge the ends of the lead-in wires. Also disclosed is a method of making the lamp including the step of applying a flame to melt down a protruding end of the sleeve lead-in wire prior to sealing the ignition mount into the glass tubing to be formed into the lamp envelope.

REFERENCES:
patent: 3816054 (1974-06-01), Baldrige et al.
patent: 3872560 (1975-03-01), Bock
patent: 3873260 (1975-03-01), Cote
patent: 3873261 (1975-03-01), Cote
patent: 3884615 (1975-05-01), Sobieski

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