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Date: |
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Description: | inscription, writing, 'OSRAM'
PATENT
G.E.C.
inscription, writing, 125V 35W
The lamp is known as the Osram metallic filament lamp and is rated for 125 volts, 35 watts, being fitted with a vitrite bayonet cap. the filament is made by squirting a mixture of finely powdered tungsten and cementing material through a small hole, afterwards heat treating the filament in such a way as to remove the cement and consolidate the metallic powder with a continuous wire (the lamp is one of the earliest marked in volts and watts only).
Part: bulb, Material: glass | Source: | Tyne & Wear Archives & Museums | Identifier: | emu.ecatalogue.science&industry.482369 | Go to resource |
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