| 摘要 |
541,505. Street lighting fittings. GENERAL ELECTRIC CO., Ltd., BEGGS, S. S., and ROUSE, H. J. Oct. 24, 1940, No. 15659. [Classes 75 (ii) and 75 (iv)] [Also in Group XL] A directional street-lighting fitting comprises two dish-shaped glass members 1, 2 having the horizontal dimension extending across the street substantially longer than that in a perpendicular direction and formed with refracting prisms 3 having horizontal edges extending substantially the whole way around the members, the upper member having a central aperture and being supported by clips 6 from a member 4 formed with a sleeve 5 fitting on a horizontal rod projecting from a street-lighting post and the lower member having attached to its rim a metal band 7 hinged at one end 9 to a frame 8 mounted on the member 4 and secured by a catch 10 at the opposite end. A high pressure mercury vapour lamp 12 is mounted in a socket 11 hinged to a projection 13 on the member 4 and is supported by a catch 14 depending from the member 4. A magnetic deflector 15 is carried by a plate 16 hinged at 17 to a frame depending from the member 4 and secured by a catch 18. The lower suurface of the plate 16 forms a reflector. The prisms are designed in accordance with Specification 507,688. |
