| 摘要 |
The lamp device comprises a sealed beam lamp (1,3,5) mounted in a casing (7) designed as a pressure vessel, so that the lens part (1) of the sealed beam lamp constitutes part of the pressure vessel wall in the form of a pressure vessel lid and so that the back side (5) of the sealed beam lamp having the electrical connecing means of sealed beam lamp is within a water-tight pressure chamber. The pressure vessel casing bears against the back side of the circumferential flange (3) of the sealed beam lamp, a ring sealing means (23) placed in a groove in the casing being arranged therebetween. The flange (3) is applied against the casing (7) by means of a ring plate (19) bearing against the front side of the flange via a pressure balacing packing (27), the ring plate being releasably tightened to the casing. The pressure chamber has such dimensions that a considerable free space is obtained around the back side (5) of the sealed beam lamp, so that thermal self-convection transferring generated lamp heat to the water-cooled walls of the casing is obtained. According to a preferred embodiment, connection leads (28, 29) brought through the pressure vessel wall in a pressure and watar-tight manner, are drawn along the inner side of the wall to a connector (31) from where heat-resistant leads (37,39) are drawn to the electrical connecting means of the sealed beam lamp. …<??>The lamp device means that the weak side of the sealed beam lamp is completely protected, that a very good cooling is obtained without any particular cooling arrangement, such as cooling flanges, and that both the sealed beam lamp and connecting leads can be replaced easily. …<??>In a particular deep water embodiment, a pressure absorbing chamber filled with a liquid is arranged in front of the lens part of the sealed beam lamp. |
