GB375477A - Improvements in and relating to electric lamps - Google Patents

Improvements in and relating to electric lamps

Info

Publication number
GB375477A
GB375477A GB11934/31A GB1193431A GB375477A GB 375477 A GB375477 A GB 375477A GB 11934/31 A GB11934/31 A GB 11934/31A GB 1193431 A GB1193431 A GB 1193431A GB 375477 A GB375477 A GB 375477A
Authority
GB
United Kingdom
Prior art keywords
incandescent
filament
lamps
class
tungsten
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
GB11934/31A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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
Priority claimed from US518146A external-priority patent/US2104680A/en
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB375477A publication Critical patent/GB375477A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/96—Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope, e.g. for simulating daylight
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B31/00—Electric arc lamps
    • H05B31/0018—Electric arc lamps in a closed vessel
    • H05B31/0027—Electric arc lamps in a closed vessel with special gasfilling

Landscapes

  • Discharge Lamp (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
GB11934/31A 1930-04-22 1931-04-22 Improvements in and relating to electric lamps Expired GB375477A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US40139XA 1930-04-22 1930-04-22
US518146A US2104680A (en) 1931-02-25 1931-02-25 Enclosed arc device

Publications (1)

Publication Number Publication Date
GB375477A true GB375477A (en) 1932-06-30

Family

ID=31890651

Family Applications (2)

Application Number Title Priority Date Filing Date
GB11934/31A Expired GB375477A (en) 1930-04-22 1931-04-22 Improvements in and relating to electric lamps
GB5558/32A Expired GB397887A (en) 1930-04-22 1932-02-24 Improvements in and relating to electric lamps

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB5558/32A Expired GB397887A (en) 1930-04-22 1932-02-24 Improvements in and relating to electric lamps

Country Status (3)

Country Link
DE (1) DE552547C (xx)
GB (2) GB375477A (xx)
NL (1) NL36515C (xx)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977321C (de) * 1950-04-13 1965-12-16 Gen Electric Niederdruckgasentladungslampe und Schaltungsanordnung zu deren Zuenden und Betrieb

Also Published As

Publication number Publication date
DE552547C (de) 1932-06-15
GB397887A (en) 1933-08-24
NL36515C (xx)

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