One of eighty-six early incandescent lamps. Straig

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One of eighty-six early incandescent lamps. Straight horizontal short thick carbon filament. No support. Carbon attached by pieces of (?) platinium bend round near the ends, platiniums sandwich the end of the copper supports to which it is electroplated. Copper supports of the shape which could short circuit when carbon breaks, but there is no indication that they are sprung. Copper attached to platinium wires passing through glass. Flattened spherical bulb with neck and pronounced flange at joint with base. Clear bulb, top pip. Cylindrical brass base fibre (?) insulated , with twin projecting connecting posts.


Object Number:
carbon filament lamp series burning?
Institution of Electronical Engineering
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