GB1158887A - Improvements relating to Lamp Bulbs - Google Patents

Improvements relating to Lamp Bulbs

Info

Publication number
GB1158887A
GB1158887A GB4117167A GB4117167A GB1158887A GB 1158887 A GB1158887 A GB 1158887A GB 4117167 A GB4117167 A GB 4117167A GB 4117167 A GB4117167 A GB 4117167A GB 1158887 A GB1158887 A GB 1158887A
Authority
GB
United Kingdom
Prior art keywords
improvements relating
lamp bulbs
filaments
base
envelope
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
GB4117167A
Other languages
English (en)
Inventor
John Willoughby Thomas Wright
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 Lighting Industries Ltd
Original Assignee
British Lighting Industries 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 NL136981D priority Critical patent/NL136981C/xx
Application filed by British Lighting Industries Ltd filed Critical British Lighting Industries Ltd
Priority to GB4117167A priority patent/GB1158887A/en
Priority to NL6809651A priority patent/NL6809651A/xx
Priority to DE19681764657 priority patent/DE1764657B1/de
Priority to SE975468A priority patent/SE332228B/xx
Publication of GB1158887A publication Critical patent/GB1158887A/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

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
GB4117167A 1967-07-18 1967-07-18 Improvements relating to Lamp Bulbs Expired GB1158887A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL136981D NL136981C (enrdf_load_stackoverflow) 1967-07-18
GB4117167A GB1158887A (en) 1967-07-18 1967-07-18 Improvements relating to Lamp Bulbs
NL6809651A NL6809651A (enrdf_load_stackoverflow) 1967-07-18 1968-07-09
DE19681764657 DE1764657B1 (de) 1967-07-18 1968-07-12 Elektrische Gluehlampe fuer Scheinwerfer
SE975468A SE332228B (enrdf_load_stackoverflow) 1967-07-18 1968-07-16

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3291867 1967-07-18
GB4117167A GB1158887A (en) 1967-07-18 1967-07-18 Improvements relating to Lamp Bulbs

Publications (1)

Publication Number Publication Date
GB1158887A true GB1158887A (en) 1969-07-23

Family

ID=26261626

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4117167A Expired GB1158887A (en) 1967-07-18 1967-07-18 Improvements relating to Lamp Bulbs

Country Status (4)

Country Link
DE (1) DE1764657B1 (enrdf_load_stackoverflow)
GB (1) GB1158887A (enrdf_load_stackoverflow)
NL (2) NL6809651A (enrdf_load_stackoverflow)
SE (1) SE332228B (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140939A (en) * 1978-04-26 1979-02-20 Gte Sylvania Incorporated Tungsten halogen lamp for headlights

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1689378A (en) * 1926-01-18 1928-10-30 Delta Engineering Lab Inc Automobile head lamp
DE606735C (de) * 1932-05-20 1934-12-11 Laribe Armand Auswechselbare Hilfsfassung fuer Gluehlampen
US2005194A (en) * 1932-12-01 1935-06-18 Walter R Armstrong Headlight lamp
US2843778A (en) * 1952-12-22 1958-07-15 Gen Motors Corp Light bulb

Also Published As

Publication number Publication date
SE332228B (enrdf_load_stackoverflow) 1971-02-01
NL136981C (enrdf_load_stackoverflow)
NL6809651A (enrdf_load_stackoverflow) 1969-01-21
DE1764657B1 (de) 1971-10-21

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years