Thermally sensitive pressure release assembly for sealed pressur

Details Thermally sensitive pressure release assembly for sealed pressur Thermally sensitive pressure release assembly for sealed pressur

1978-02-13

1980-04-01

Moy, Joseph Man-Fu

Receptacles

Envelope for electric lamp or similar device

With evacuating stem or valve

220 89B, 137 68R, H01K 322

Patent

active

041957458

ABSTRACT:
A pressure release assembly provides controlled depressurization of a sea gas-containing vessel, such as a xenon-filled arc lamp, when the temperature of the gas in the vessel reaches a value corresponding to a selected pressure. The assembly comprises a thin metallic rupture plate that hermetically seals an aperture in a wall of the vessel, and a back-up disc that is supported adjacent the other surface of the rupture plate. The back-up disc reinforces the rupture plate so as to prevent bursting of the rupture plate at pressures below the selected pressure. The back-up disc is made of a material that loses its tensile strength at the temperature corresponding to the selected pressure, whereby the weakening of the back-up disc at the selected pressure causes the rupture plate to burst. The back-up plate may be made of a eutectic alloy that melts at the temperature corresponding to the selected pressure.

REFERENCES:
patent: 1973182 (1934-09-01), Shaw
patent: 2947443 (1960-08-01), Sawyer et al.
patent: 2954897 (1960-10-01), Hansen et al.
patent: 3184097 (1965-05-01), Kilmer et al.
patent: 3269402 (1960-08-01), Horner
patent: 3906976 (1975-09-01), Nohr et al.

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