Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 70
No 612, closed. No. 612, shewing method of opening. The principal features claimed arefacility of installation, easy wiring—looping-in in particular—centralisation ofthe filament, no hinges to corrode, easyremoval of the lid without dropping it,and in two of the types the facility touse either one…
Lighting
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