One of eighty-six early incandescent lamps. Carbon
One of eighty-six early incandescent lamps. Carbon filament lamp, single-loop filament, no filament supports. Lead-in wires pass through short stem to copper wires other side. Clear tapered bulb, slight shoulder at base.Top pip. Westing house base. (Brass cylinder with circular ridge and groove,plaster attached and insulated, projecting pin for second contact). Maker unspecified but base carries words engraved "Sawye-Man patents"; Westing house concentrated its lamp production through its Sawyer Man subsidiary inthe years around the turn of the century, and it had done this in 1892 to avoid patent problems. No ratings given.
- Object Number:
- carbon filament lamp
- Institution of Electronical Engineering
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