GB425485A - Improvements in or relating to incandescent electric lamps - Google Patents

Improvements in or relating to incandescent electric lamps

Info

Publication number
GB425485A
GB425485A GB25633/33A GB2563333A GB425485A GB 425485 A GB425485 A GB 425485A GB 25633/33 A GB25633/33 A GB 25633/33A GB 2563333 A GB2563333 A GB 2563333A GB 425485 A GB425485 A GB 425485A
Authority
GB
United Kingdom
Prior art keywords
fenn
bulb
class
relating
incandescent lamp
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
GB25633/33A
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.)
BERTRAM B FENN Ltd
Original Assignee
BERTRAM B FENN 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 BERTRAM B FENN Ltd filed Critical BERTRAM B FENN Ltd
Priority to GB25633/33A priority Critical patent/GB425485A/en
Priority to FR763213D priority patent/FR763213A/fr
Priority to BE399427D priority patent/BE399427A/xx
Publication of GB425485A publication Critical patent/GB425485A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels

Landscapes

  • Optical Measuring Cells (AREA)
  • Connecting Device With Holders (AREA)
GB25633/33A 1933-09-15 1933-09-15 Improvements in or relating to incandescent electric lamps Expired GB425485A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB25633/33A GB425485A (en) 1933-09-15 1933-09-15 Improvements in or relating to incandescent electric lamps
FR763213D FR763213A (fr) 1933-09-15 1933-10-30 Perfectionnements aux lampes électriques à incandescence
BE399427D BE399427A (ko) 1933-09-15 1933-10-31

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB25633/33A GB425485A (en) 1933-09-15 1933-09-15 Improvements in or relating to incandescent electric lamps
FR763213T 1933-10-30
BE399427T 1933-10-31

Publications (1)

Publication Number Publication Date
GB425485A true GB425485A (en) 1935-03-15

Family

ID=10230817

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25633/33A Expired GB425485A (en) 1933-09-15 1933-09-15 Improvements in or relating to incandescent electric lamps

Country Status (3)

Country Link
BE (1) BE399427A (ko)
FR (1) FR763213A (ko)
GB (1) GB425485A (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652892A (en) * 1968-11-04 1972-03-28 Tokyo Shibaura Electric Co Illuminating lamp having concave segments on exterior bulb surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652892A (en) * 1968-11-04 1972-03-28 Tokyo Shibaura Electric Co Illuminating lamp having concave segments on exterior bulb surface

Also Published As

Publication number Publication date
BE399427A (ko) 1933-11-30
FR763213A (fr) 1934-04-25

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