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Electric lamp with a large ratio of the wall thickness of the outer casing to that of the inner casing.
Electric lamp with a large ratio of the wall thickness of the outer casing to that of the inner casing.
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机译:电灯的外壳壁厚与内壳壁厚之比大。
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摘要
An electric lamp having a relatively high outer-envelope to inner-envelope wall-thickness ratio whereby the risk of a containment failure of the lamp is substantially eliminated. In an alternate embodiment, the outer envelope has a concave top. In another embodiment, the neck of the outer envelope has a relatively thick wall. Lamps having a wall-thickness ratio falling within the prescribed range, i.e., approximately equal to or greater than 3, have the property that the outer envelope will contain shards of the inner light-source capsule in the unlikely event such inner capsule should burst.
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