GB490068A - Improvements in and relating to electric discharge lamps - Google Patents

Improvements in and relating to electric discharge lamps

Info

Publication number
GB490068A
GB490068A GB718637A GB718637A GB490068A GB 490068 A GB490068 A GB 490068A GB 718637 A GB718637 A GB 718637A GB 718637 A GB718637 A GB 718637A GB 490068 A GB490068 A GB 490068A
Authority
GB
United Kingdom
Prior art keywords
discharge lamps
pinch
taken
bulb
relating
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
GB718637A
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 to NL50333D priority Critical patent/NL50333C/xx
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB718637A priority patent/GB490068A/en
Publication of GB490068A publication Critical patent/GB490068A/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
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/822—High-pressure mercury lamps

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
GB718637A 1937-03-11 1937-03-11 Improvements in and relating to electric discharge lamps Expired GB490068A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL50333D NL50333C (enEXAMPLES) 1937-03-11
GB718637A GB490068A (en) 1937-03-11 1937-03-11 Improvements in and relating to electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB718637A GB490068A (en) 1937-03-11 1937-03-11 Improvements in and relating to electric discharge lamps

Publications (1)

Publication Number Publication Date
GB490068A true GB490068A (en) 1938-08-09

Family

ID=9828257

Family Applications (1)

Application Number Title Priority Date Filing Date
GB718637A Expired GB490068A (en) 1937-03-11 1937-03-11 Improvements in and relating to electric discharge lamps

Country Status (2)

Country Link
GB (1) GB490068A (enEXAMPLES)
NL (1) NL50333C (enEXAMPLES)

Also Published As

Publication number Publication date
NL50333C (enEXAMPLES)

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