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Expired
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Siemens Schuckertwerke AG
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Siemens Schuckertwerke AG
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Application filed by Siemens Schuckertwerke AGfiledCriticalSiemens Schuckertwerke AG
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Publication of GB190609990ApublicationCriticalpatent/GB190609990A/en
9990. Siemens - Schuckert - Werke Ges. May 31, 1905, [date applied for under Patents Act, 1901]. Lamp shades and reflectors.-A mercury-vapour lamp c, which may be of quartz, has a fluorescent reflector a, which is closed by a, diaphragm b of clear or ground glass. Part of the hygienicallyobjectionable ultra-violet rays; are converted into useful light and the rest are absorbed by the glass.
GB190609990D1905-05-311906-04-28An Improvement in Electric Mercury Vapour Lamps.
ExpiredGB190609990A
(en)
Improvements in or relating to Electric Lamps especially applicable to Electric Lamps of the character known as "Vapour Arc Lamps" or "Luminous Vapour Electric Lamps"