GB755682A - Improvements in or relating to electric lamps - Google Patents

Improvements in or relating to electric lamps

Info

Publication number
GB755682A
GB755682A GB14050/54A GB1405054A GB755682A GB 755682 A GB755682 A GB 755682A GB 14050/54 A GB14050/54 A GB 14050/54A GB 1405054 A GB1405054 A GB 1405054A GB 755682 A GB755682 A GB 755682A
Authority
GB
United Kingdom
Prior art keywords
bulb
mirror
filament
marks
centre
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
GB14050/54A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB755682A publication Critical patent/GB755682A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
GB14050/54A 1953-05-16 1954-05-13 Improvements in or relating to electric lamps Expired GB755682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL319766X 1953-05-16

Publications (1)

Publication Number Publication Date
GB755682A true GB755682A (en) 1956-08-22

Family

ID=19783946

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14050/54A Expired GB755682A (en) 1953-05-16 1954-05-13 Improvements in or relating to electric lamps

Country Status (5)

Country Link
BE (1) BE527480A (enrdf_load_stackoverflow)
CH (1) CH319766A (enrdf_load_stackoverflow)
DE (1) DE936155C (enrdf_load_stackoverflow)
FR (1) FR1100668A (enrdf_load_stackoverflow)
GB (1) GB755682A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
CH319766A (de) 1957-02-28
BE527480A (enrdf_load_stackoverflow)
DE936155C (de) 1955-12-07
FR1100668A (fr) 1955-09-22

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