. Light and lighting. r use. Inmany cnsxin the intrinsic brilliancy of theexposed linsl a dark background, has ?> distinctlj glaring effect, and it i- well known that in ? ie illummat K>n along the stnet is very far from uniform. It is-by no mean- an easy problem to improvethese two conditions, hut with thecoming of the half-watt lam]) we mayreasonably expect t deal with theproblem more successfully and this unit seems to be a Btep in theright direction. Fig. 4 show- the component parts. :; t be general appearance of the unit. Surrounding the filament is a cup-like diffusing gl
. Light and lighting. r use. Inmany cnsxin the intrinsic brilliancy of theexposed linsl a dark background, has ?> distinctlj glaring effect, and it i- well known that in ? ie illummat K>n along the stnet is very far from uniform. It is-by no mean- an easy problem to improvethese two conditions, hut with thecoming of the half-watt lam]) we mayreasonably expect t deal with theproblem more successfully and this unit seems to be a Btep in theright direction. Fig. 4 show- the component parts. :; t be general appearance of the unit. Surrounding the filament is a cup-like diffusing glass reflector; underneath is another conical white reflecting at its top a ventilating filament is thu- completely screenedfrom view except over a small angleslightly below the horizontal (where,is well known, the maximum candle-power for street-lighting purposes i-required). The peculiar polar curve ofLight distribution obtained from the unitseems to he well adapted to securing. Pig 4 Component parts oi newMazda street-lighting reflector -how n in Fig uniform street illumination. A corn-parison of tin-, curve with that of thebare Lamp shows very clearly how greatly the natural distribution Oi light froma SOUrCe can he altered hy the of appropriate The appearance of a row of these newunits would be most Btriking and it would he interest ing t | reel lighted in this way. We hope beforevery long to have an opportunity of doing bo. Meantime we propose inanother issue to describe a few morehalf-watt tittiiiL:-. including those ofthe semi-indirect type which find gifavour for use with nalf-watt Ian (To In continut I.) THE ILLUMINATING ENGINEER (oct.) 501
Size: 1385px × 1804px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthori, bookcentury1900, bookdecade1900, bookpublisherlondon
