GB800553A - Improvements in or relating to fittings and mountings for electric lamps - Google Patents

Abstract

800,553. Supporting lamps. SCHNEIDER, J., '[trading as SCHNEIDER & CO. DRIng]. Dec. 21, 1954 [Dec. 31, 1953; April 17, 1954; April 26, 1954; April 30, 1954; May 31, 1954; June 11, 1954; June 15, 1954; Sept. 8, 1954], No. 36915/54. Class 75(4) [Also in Groups XXXVI and XL(a)] A fluorescent lamp arrangement comprising a fluorescent discharge tube has at least those parts of the lamp base and of the socket for the fluorescent tube which do not carry electric current and which are within an imaginary extension of the tube made of light-permeable material. Fig. 1 shows a fluorescent discharge lamp 10 in which the base 17, cement 16, socket 18 and socket support 19 are made of substantially transparent material. The socket 18 may be smaller in cross-section than the base 17. Small pyramids may be formed on the inner surface of the base 17 for light diffusion. In the construction shown in Figs. 5-7, the transparent socket 18 is of wedge-shape and has surfaces 21 and 26 with horizontally and vertically extending prismatic corrugations respectively for light diffusion. A modified construction is shown in Fig. 8 in which a transparent angular piece 25 supports the socket 18. Besides the corrugations 21 and 26 the side faces of the socket 18 can be provided with prismatic corrugations and can be disposed at an acute angle to one another. In the construction shown in Fig. 10, a transparent hemispherical socket 18 provided with transparent small pyramids 27 is secured to the transparent angular support 19 provided with prismatic corrugations 28 or with small pyramids. In the construction shown in Fig. 11 the socket 18 is made of transparent synthetic resin which fairs into an angularly bent web 19. The outer face and periphery of the transparent base 17 are provided with pyramids 27. In the construction shown in Figs. 13 and 14, the inner surface of the transparent base 17 is provided with semi-circular cavities 27<SP>11</SP> and convex cavities 27<SP>111</SP> for light diffusion. In the construction shown in Figs. 15 and 16, the lamp 10 with transparent base 17 and socket 18 is connected to a mounting base 22 by a support member 19 positioned out of the plane of the socket 18 and formed with two flanges 32 and 33 having holes 34 and 35 for connection to the mounting base 22 and socket 18 respectively.