GB2220202B - Linear filament lamp and tubular quartz glassware used in the manufacture of a linear filament lamp - Google Patents

Linear filament lamp and tubular quartz glassware used in the manufacture of a linear filament lamp

Info

Publication number
GB2220202B
GB2220202B GB8815788A GB8815788A GB2220202B GB 2220202 B GB2220202 B GB 2220202B GB 8815788 A GB8815788 A GB 8815788A GB 8815788 A GB8815788 A GB 8815788A GB 2220202 B GB2220202 B GB 2220202B
Authority
GB
United Kingdom
Prior art keywords
filament lamp
linear filament
manufacture
tubular quartz
glassware used
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 - Lifetime
Application number
GB8815788A
Other versions
GB8815788D0 (en
GB2220202A (en
Inventor
David Wynn Parlour
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.)
Thorn EMI PLC
Original Assignee
Thorn EMI PLC
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 Thorn EMI PLC filed Critical Thorn EMI PLC
Priority to GB8815788A priority Critical patent/GB2220202B/en
Publication of GB8815788D0 publication Critical patent/GB8815788D0/en
Publication of GB2220202A publication Critical patent/GB2220202A/en
Application granted granted Critical
Publication of GB2220202B publication Critical patent/GB2220202B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
GB8815788A 1988-07-02 1988-07-02 Linear filament lamp and tubular quartz glassware used in the manufacture of a linear filament lamp Expired - Lifetime GB2220202B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8815788A GB2220202B (en) 1988-07-02 1988-07-02 Linear filament lamp and tubular quartz glassware used in the manufacture of a linear filament lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8815788A GB2220202B (en) 1988-07-02 1988-07-02 Linear filament lamp and tubular quartz glassware used in the manufacture of a linear filament lamp

Publications (3)

Publication Number Publication Date
GB8815788D0 GB8815788D0 (en) 1988-08-10
GB2220202A GB2220202A (en) 1990-01-04
GB2220202B true GB2220202B (en) 1992-04-08

Family

ID=10639781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8815788A Expired - Lifetime GB2220202B (en) 1988-07-02 1988-07-02 Linear filament lamp and tubular quartz glassware used in the manufacture of a linear filament lamp

Country Status (1)

Country Link
GB (1) GB2220202B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB271097A (en) * 1926-05-12 1928-08-13 British Thomson Houston Co Ltd Improvements in and relating to apparatus for frosting glass
GB380547A (en) * 1930-08-07 1932-09-22 Kooperativa Foerbundet Improved apparatus for frosting the interior surfaces of incandescent lamp bulbs andother hollow glass objects
GB510956A (en) * 1938-02-10 1939-08-10 William Warren Triggs Improvements in and relating to electric lamp bulbs
GB810910A (en) * 1956-06-13 1959-03-25 Philips Electrical Ind Ltd Improvements in or relating to methods of frosting part of the inner wall of a hollow article made from hard glass
GB907359A (en) * 1959-10-15 1962-10-03 St Georges Engineers Ltd Improvements in shot blasting apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB271097A (en) * 1926-05-12 1928-08-13 British Thomson Houston Co Ltd Improvements in and relating to apparatus for frosting glass
GB380547A (en) * 1930-08-07 1932-09-22 Kooperativa Foerbundet Improved apparatus for frosting the interior surfaces of incandescent lamp bulbs andother hollow glass objects
GB510956A (en) * 1938-02-10 1939-08-10 William Warren Triggs Improvements in and relating to electric lamp bulbs
GB810910A (en) * 1956-06-13 1959-03-25 Philips Electrical Ind Ltd Improvements in or relating to methods of frosting part of the inner wall of a hollow article made from hard glass
GB907359A (en) * 1959-10-15 1962-10-03 St Georges Engineers Ltd Improvements in shot blasting apparatus

Also Published As

Publication number Publication date
GB8815788D0 (en) 1988-08-10
GB2220202A (en) 1990-01-04

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020702