Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 25
3- spherical electrode, whilst the other twosupported the ionising rod. There werethree contacts in the lamp cap, which hadodd sized pins, and a three plunger lampholder, having large and small slots, wasemployed. This prevented wrong con-nections between lamp holder and lampcap. Fig (2) showed… … FiG. 2.—Showing arranjiement of tungstenglobule, ionising filament, and resistancefor tungsten arc incandescent lamp.
Lighting
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