Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1985-06-06
1986-11-25
DeMeo, Palmer C.
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313579, 313580, 362186, H01K 134, H01K 150
Patent
active
046251405
ABSTRACT:
A double-enveloped tungsten halogen incandescent lamp having a light-source capsule containment device wherein a knitted wire mesh surrounds the light-source capsule and may be anchored to the capsule, stem, or lead-in wires. In the event of a burst of the light-source capsule, the containment mesh substantially restricts shards of the capsule from shattering the outer envelope of the lamp. In some embodiments, a crumpled portion of the containment mesh is positioned above the capsule and provides a collision-absorbing cushion in the event the capsule and mesh are propelled against the outer envelope by the burst of the light-source capsule whereby further protection against the shattering of the outer envelope is provided. Lamps with such containment devices have improved operational safety characteristics.
REFERENCES:
patent: 314208 (1885-03-01), White
patent: 3148835 (1964-09-01), Horelick
patent: 3223273 (1965-12-01), Thorington
patent: 4281274 (1981-07-01), Bechard et al.
patent: 4338540 (1982-07-01), Sovilla
DeMeo Palmer C.
GTE Products Corporation
McNeill William H.
O'Shea Sandra L.
Romanow Joseph S.
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