GB191517542A - An Improved Projector Lamp for use with Incadescent Filaments. - Google Patents

An Improved Projector Lamp for use with Incadescent Filaments.

Info

Publication number
GB191517542A
GB191517542A GB191517542DA GB191517542A GB 191517542 A GB191517542 A GB 191517542A GB 191517542D A GB191517542D A GB 191517542DA GB 191517542 A GB191517542 A GB 191517542A
Authority
GB
United Kingdom
Prior art keywords
incadescent
filaments
projector lamp
improved projector
improved
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB191517542A publication Critical patent/GB191517542A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
    • H01K1/325—Reflecting coating

Landscapes

  • Illuminated Signs And Luminous Advertising (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
GB191517542D 1915-02-19 1915-12-15 An Improved Projector Lamp for use with Incadescent Filaments. Expired GB191517542A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE298082T 1915-02-19

Publications (1)

Publication Number Publication Date
GB191517542A true GB191517542A (en) 1916-04-06

Family

ID=32605129

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191517542D Expired GB191517542A (en) 1915-02-19 1915-12-15 An Improved Projector Lamp for use with Incadescent Filaments.

Country Status (3)

Country Link
DE (1) DE298082C (https=)
FR (1) FR512122A (https=)
GB (1) GB191517542A (https=)

Also Published As

Publication number Publication date
FR512122A (fr) 1921-01-15
DE298082C (https=) 1919-06-10

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