GB380613A - Improvements in or relating to electric lamp bulbs for vehicle head-lamps - Google Patents

Improvements in or relating to electric lamp bulbs for vehicle head-lamps

Info

Publication number
GB380613A
GB380613A GB2741031A GB2741031A GB380613A GB 380613 A GB380613 A GB 380613A GB 2741031 A GB2741031 A GB 2741031A GB 2741031 A GB2741031 A GB 2741031A GB 380613 A GB380613 A GB 380613A
Authority
GB
United Kingdom
Prior art keywords
bulb
coating
filament
reflector
plane containing
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
GB2741031A
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.)
WILFRID HERBERT LUND
WILLIAM CHARLES HOWARD
Original Assignee
WILFRID HERBERT LUND
WILLIAM CHARLES HOWARD
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
Priority to FR744296D priority Critical patent/FR744296A/fr
Application filed by WILFRID HERBERT LUND, WILLIAM CHARLES HOWARD filed Critical WILFRID HERBERT LUND
Priority to GB2741031A priority patent/GB380613A/en
Publication of GB380613A publication Critical patent/GB380613A/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

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
GB2741031A 1931-10-02 1931-10-02 Improvements in or relating to electric lamp bulbs for vehicle head-lamps Expired GB380613A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR744296D FR744296A (enrdf_load_stackoverflow) 1931-10-02
GB2741031A GB380613A (en) 1931-10-02 1931-10-02 Improvements in or relating to electric lamp bulbs for vehicle head-lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2741031A GB380613A (en) 1931-10-02 1931-10-02 Improvements in or relating to electric lamp bulbs for vehicle head-lamps

Publications (1)

Publication Number Publication Date
GB380613A true GB380613A (en) 1932-09-22

Family

ID=10259112

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2741031A Expired GB380613A (en) 1931-10-02 1931-10-02 Improvements in or relating to electric lamp bulbs for vehicle head-lamps

Country Status (2)

Country Link
FR (1) FR744296A (enrdf_load_stackoverflow)
GB (1) GB380613A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR744296A (enrdf_load_stackoverflow) 1933-04-14

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