| 摘要 |
A method of making an electrically-activated photoflash lamp which includes an ignition structure consisting of a pair of metallic lead wires (21, 23) and primer material (25) disposed on terminations thereof. The structure is hermetically sealed within the end of the lamp's glass envelope by firstly applying heat (e.g., by gas-oxygen burners) to the open end portion of the tubing member (35) (which eventually comprises the lamp's envelope) sufficiently to cause the heated glass to flow about the conductors. The final configuration of this end is achieved by introducing a gas within the tubing member's remaining open end to cause the heated end to expand to the desired shape, whereupon the end is permitted to cool. The hermetic seal, as achieved during the initial heating stage, is retained. The desired internal component (e.g., primer, combustible material, and combustion-supporting gas) are then added to the tubing member and the member's remaining open end sealed using a tipping off technique.
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