GB339036A - Improvements in and relating to incandescent electric lamps - Google Patents

Improvements in and relating to incandescent electric lamps

Info

Publication number
GB339036A
GB339036A GB2991429A GB2991429A GB339036A GB 339036 A GB339036 A GB 339036A GB 2991429 A GB2991429 A GB 2991429A GB 2991429 A GB2991429 A GB 2991429A GB 339036 A GB339036 A GB 339036A
Authority
GB
United Kingdom
Prior art keywords
relating
bulb
electric lamps
incandescent electric
rear part
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
GB2991429A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2991429A priority Critical patent/GB339036A/en
Publication of GB339036A publication Critical patent/GB339036A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
    • H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

339,036. Fenn, B. B. Oct. 2, 1929. Bulbs.-A colourless bulb more particularly for use as an antidazzle lamp for vehicles has a rear part 2 formed in the moulding process with local humps as distinguished from frosting &c. or is indented by stippling and a forward part 3 of a diameter equal to or greater than that of the rear part. The internal surface may be smooth or may have undulations which follow those of the external surface. Bayonet slots in a holder 10 enable a filament 4 to be placed in the focus of a reflector 8. The two parts of the bulb may be independently illuminated by separate filaments. Specification 323,017 is referred to.
GB2991429A 1929-10-02 1929-10-02 Improvements in and relating to incandescent electric lamps Expired GB339036A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2991429A GB339036A (en) 1929-10-02 1929-10-02 Improvements in and relating to incandescent electric lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2991429A GB339036A (en) 1929-10-02 1929-10-02 Improvements in and relating to incandescent electric lamps

Publications (1)

Publication Number Publication Date
GB339036A true GB339036A (en) 1930-12-04

Family

ID=10299251

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2991429A Expired GB339036A (en) 1929-10-02 1929-10-02 Improvements in and relating to incandescent electric lamps

Country Status (1)

Country Link
GB (1) GB339036A (en)

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