Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 275
t apart fromthe actual question of illumination therewere certain mechanical difficulties whichhave to !>■ overcome : the first was withregard to vibration and breakage oflamp filaments; the se< ond, the preventionof fracture and v. orking loose of refl< ctors; and the third, the… … He also said that it is found in practicethat the ordinary means oi securingreflectors is unsatisfactory, owing to thevibration of the tram ; he Bhowed adiagram illustrating a method for obviat-ing tract ure or working loose of thereflector. The fitting being jned that three spring clips are forced…
Lighting
Internet Archive · University of Toronto Libraries · Public Domain Mark 1.0. Free to use for anything.
