Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 85
hich was focused on to the groundglass disc, forming the front of the sign,by a suitable lens. An electro-magneticdevice in the lighting circuit was devisedto jerk the pieces of glass at regularintervals, thus continually altering thekaleidoscopic pattern focused on thecentral portion of the glass… … Fie. -.—Showing typical appearance ofkaleidosign. It was remarked that window-dressingand window-lighting should be consideredtogether. It was also often advantageousfor shop-lighting, and the use of illum-inated signs, to be undertaken jointlywith the design and provision of shop-fittings. The…
Lighting
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