| 摘要 |
688,775. Lighting fittings. SIEMENS ELECTRIC LAMPS & SUPPLIES, Ltd., and STEVENS R. W. June 8, 1951 [June 16, 1950], No. 15143/50. Classes 75(ii) and 75(iv) A closed elongated transparent vessel 1 for a lighting fitting contains a light reflecting or refracting system and an open-ended tubular transparent jacket 4 for the reception of the lamp is sealed into the vessel in a dust and weatherproof manner. The vessel is of cylindrical or barrel shape and is formed by two equal members held in sealed abutment along circumferential edges by two rods 23 and by a tube 24 extending through the vessel and secured by nuts to plates 2, 3 closing the ends of the vessel in sealed manner; the vessel may be formed by two trough-shaped members abutting along longitudinal edges. One end plate 2 is centrally apertured for the reception of the tubular jacket 4 which has a hollow porcelain cap 10 cemented to its open end and abutting the outside of plate 2. The dustproof seal between the jacket and the vessel is formed by a rubber ring 12 clamped to the end plate 2 and having an internal diameter slightly less than that of the end cap 10 so'that it spreads over the surface of the cap. The jacket is supported along its length by stirrups 21 suspended from the rods 23. A metal casting 5 having a hooded part 28 abutting the other end plate 3 and a tubular part 27 for embracing a supporting pipe is secured to the projecting ends of the rods 23. The cap 10 and the end plate 2 are covered by a member 20 having ball studs 18 releasably engaged with clips 17 on the end plate. The cap 10 is moulded internally to provide supporting and locating means for the lamp. The jacket may be double walled. The fitting may be supported at both ends by means allowing longitudinal and tilting movement cf the vessel to gain access to the lamp. The jacket may be open at both ends and extend in sealed manner through both end plates 2, 3. |
