GB359766A - Improvements in electric incandescent lamps - Google Patents

Improvements in electric incandescent lamps

Info

Publication number
GB359766A
GB359766A GB35460/30A GB3546030A GB359766A GB 359766 A GB359766 A GB 359766A GB 35460/30 A GB35460/30 A GB 35460/30A GB 3546030 A GB3546030 A GB 3546030A GB 359766 A GB359766 A GB 359766A
Authority
GB
United Kingdom
Prior art keywords
bulb
electric incandescent
lamp
reflecting layer
covering
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
GB35460/30A
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.)
ELEK SCHE GLUEHLAMPENFABRIK WA
Original Assignee
ELEK SCHE GLUEHLAMPENFABRIK WA
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 ELEK SCHE GLUEHLAMPENFABRIK WA filed Critical ELEK SCHE GLUEHLAMPENFABRIK WA
Publication of GB359766A publication Critical patent/GB359766A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)

Abstract

359,766. Electric incandescent lamp bulbs. ELEKTRISCHE GLUHLAMPENFABRIK WATT AKT.-GES., 134, Heiligenstadterstrasse, Vienna. Nov. 25, 1930, No. 35460. Convention date, Feb. 19. [Class 39 (ii).] The bulb of an electric incandescent lamp for projection purposes has the upper portion formed of conical shape with an obtuse angle of opening of about 135‹ and a covering reflecting layer R, the lower portion M of the bulb being hemispherical and frosted or otherwise rendered light-diffusing. The reflecting layer R may be obtained by silvering and is continued down over the lower portion M, covering a zone having a depth of about one-quarter of the radius of the bulb. The Specification as open to inspection under Sect. 91 (3) (a) describes also a lamp holder which is for use with the lamp and may either be held by a removable wooden handle or screwed into an ordinary commercial photographic holder. This subject-matter does not appear in the Specification as accepted.
GB35460/30A 1930-02-19 1930-02-25 Improvements in electric incandescent lamps Expired GB359766A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT359766X 1930-02-19

Publications (1)

Publication Number Publication Date
GB359766A true GB359766A (en) 1931-10-29

Family

ID=3672724

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35460/30A Expired GB359766A (en) 1930-02-19 1930-02-25 Improvements in electric incandescent lamps

Country Status (4)

Country Link
BE (1) BE377481A (en)
DE (1) DE564175C (en)
FR (1) FR711553A (en)
GB (1) GB359766A (en)

Also Published As

Publication number Publication date
BE377481A (en)
FR711553A (en) 1931-09-12
DE564175C (en) 1932-12-03

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