Method of making a photoflash lamp having new lead seal structur

Details Method of making a photoflash lamp having new lead seal structur Method of making a photoflash lamp having new lead seal structur

1980-07-21

1983-01-25

Ramsey, Kenneth J.

Metal working

Barrier layer or semiconductor device making

Barrier layer device making

29 2513, H01J 932

Patent

active

043695566

ABSTRACT:
A method of making an electrically-activated photoflash lamp which includes a lead glass envelope, a quantity of shredded zirconium or hafnium combustible material and an ignition structure disposed within the envelope for igniting the combustible material upon application of a high voltage, low energy pulse thereto. The ignition structure includes a pair of metallic lead wires secured within one end of the envelope and having terminations which lie substantially flush with the interior surface of this end. A quantity of primer material bridges the terminations and is ignited upon application of the above pulse. The lead wires are secured and hermetically sealed within the envelope's end while the bulb is inverted, without the need for a press sealing operation. A method of axially adjusting the ends of the lead wires with respect to the bulb while the seal is hot is also disclosed.

REFERENCES:
patent: 2235515 (1941-03-01), Carpenter
patent: 2428059 (1947-09-01), Wolfson
patent: 3178796 (1965-04-01), Smits
patent: 3263457 (1966-08-01), Reiber
patent: 3290906 (1966-12-01), Schilling et al.
patent: 3752636 (1973-08-01), Warnick
patent: 3884615 (1975-05-01), Sobieski
patent: 3959860 (1976-06-01), Schindler
patent: 4097220 (1978-06-01), Cote et al.

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