| 摘要 |
1300906 Photo-flash lamp GTE SYLVANIA Inc 15 Sept 1971 [26 Oct 1970] 43085/71 Heading G2L A photo-flash lamp includes a laminated envelope 2 comprising three layers 8, 9, 10 of glass fused together. The inner and outer layers 10, 8 may be in compression the middle layer, 9, in tension, the thermal expansion of the middle layer being higher than that of the other layers. The lamp may be filled with oxygen and a shredded metal e.g. aluminium or zirconium, and be either electrically or percussively ignited. |
