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Fluorescent Lamps for Bus interior and Display Panel

19th February 1960
Page 60
Page 60, 19th February 1960 — Fluorescent Lamps for Bus interior and Display Panel
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THE Potteries Motor Traction Co., Ltd., have introduced fluorescent interior lighting into one of their Leyland Atlanteans to replace the existing incandescent lights, and made provision for fluorescent illumination of art advertisement panel on the off side.

Twenty-eight of the existing lamps were replaced by 10 2-ft.-long 20w tubes. The former bulbs had a total • battery consumption of 14 amp., whereas the tubes consume 10.5 amp. Five transistor converters working at 6,000 cycles per second convert 24v. D.C. to 70V. A.C. for the tubes.

The transistors are installed in the cove panels, and points giving access to them areconcealed by advertisements.Two tubes have been mounted in the cove panels, and the remainder are arranged diagonally above the seats. It has been found that a more even distribution of light is given by the fluorescent units, and that total light output is higher although battery drain is reduced.

A separate transistorized circuit feeds 10 identical tubes which illuminate a Littlewoods Pools advertisement. This measures 18 ft. long by I ft. 10 in. deep. The panel consists of three translucent Perspex sheets with the display spraypainted on the back. The sheets are supported in a Clatonrite glazing strip and valance framework made from 16-gauge aluminium sheet. Tubes arid transistors, supplied by Philips Electrical, Ltd., are secured beneath the valance by brackets. An extrusion about 11 in. beyond the normal body line accommodates the sign and equipment. It is within' the 8-ft. width limit.

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