Summary
220 Volt, 50 Watt, straight tungsten filament, electric lamp. Made by Siemens Brothers Dynamo Works Ltd, in Dalston, London, England from 1910.
The Wotan lamps were developed by Siemens & Halske of Germany in 1910. The name is a contraction of the alloy of the metals, Wolfram (or Tungsten) and Tantalum, from which the filament was made. The Siemens Wotan lamps were the first lamps made with a tungsten filament that was produced by drawing a wire out of a die, instead of squirting material through a die to make a thread. The Wotan lamps were available in Australia by 1912.
Physical Description
203 mm (8 inch) circumference glass globe. Straight tungsten filament, zig-zagged circumferentially between 10 wire supports in a 'squirrel cage' arrangement. Exhausted at top of globe. Brass bayonet cap. Double pin contact.
More Information
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Collecting Areas
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Acquisition Information
Unknown Acquisition Method from Unknown Source
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Manufacturer
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Inscriptions
On globe: ' Wotan ' On stem: ' 63 ' On glass, inside cap, black ink, handwritten: ' 099-96-1-134 ' On base: ' 220 50 XIII a ', ' LC [inside circle] '
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Brand Names
Siemens (Electric Light Bulbs) , WOTAN (Electric Light Bulbs)
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Classification
Energy technology, Illumination - electric, Electric light globes
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Category
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Discipline
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Type of item
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Overall Dimensions
150 mm (Length), 203 mm (Circumference), 60 mm (Outside Diameter)
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Keywords
Electric Lamps, Electric Light Globes, Electric Light Lamps, Electric Lighting, Electric Lights, Tungsten Mineral Products, Tantalum