Encapsulated photoflash device having a radiant energy-activated

Details Encapsulated photoflash device having a radiant energy-activated Encapsulated photoflash device having a radiant energy-activated

1982-01-06

1985-05-07

Scott, Samuel

Combustion

Illuminating flash device, e.g., photographic bulb, etc.

Fuel charge within sealed transparent casing, e.g., bulb

431360, 431364, 362 10, 362 13, F21K 502

Patent

active

045155585

ABSTRACT:
A photoflash device which includes a plastic substrate, lamp-firing circuitry located on a first surface of the substrate, a disconnect switch also secured to the first surface of the substrate and electrically joined to the lamp-firing circuitry, at least one electrically activated photoflash lamp located above the switch for activating said switch upon ignition thereof, and a solid, light-transmitting polymer located about and encapsulating the glass envelope of the lamp. A thin, light-transmitting polyester member is located over the switch to protect the switch during formation of the device. The polyester member serves to prevent contact between the resin which forms the polymer and switch during thisformation, thus assuring close placement of the lamp's envelope and switch, said placement thereby assuring proper activation (e.g., severance) of the switch.

REFERENCES:
patent: 2258708 (1941-10-01), Langkammerer
patent: 3435198 (1969-03-01), Ryan
patent: 3612850 (1971-10-01), Nijland et al.
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patent: 4017728 (1977-04-01), Audesse et al.
patent: 4154569 (1979-05-01), Van Werkhoven
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patent: 4234304 (1980-11-01), Heytmeijer
patent: 4341817 (1982-07-01), Tozier et al.
patent: 4373906 (1983-02-01), Holmes
patent: 4375953 (1983-03-01), Bouchard et al.
patent: 4397803 (1983-08-01), Hall, Jr. et al.
patent: 4420301 (1983-12-01), Shaffer
Encyclopedia of Polymer Science and Technology, 1969, vol. 10, p. 710.

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