GB1212329A - Method of manufacturing lamps - Google Patents

Method of manufacturing lamps

Info

Publication number
GB1212329A
GB1212329A GB3299569A GB3299569A GB1212329A GB 1212329 A GB1212329 A GB 1212329A GB 3299569 A GB3299569 A GB 3299569A GB 3299569 A GB3299569 A GB 3299569A GB 1212329 A GB1212329 A GB 1212329A
Authority
GB
United Kingdom
Prior art keywords
tube
filament
crossbar
envelope
june
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
GB3299569A
Inventor
Robert P Bonazoli
James P Keenan
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB1212329A publication Critical patent/GB1212329A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J5/32—Seals for leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/20—Sealing-in wires directly into the envelope

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

1,212,329. Tubular lamps. SYLVANIA ELECTRIC PRODUCTS Inc. 30 June, 1969 [28 June, 1968], No 32995/69. Heading B1F. A method of manufacturing a tipless lamp comprises the steps of inserting a filament assembly 4 into a tube having a length greater than the predetermined required length of the lamp envelope, the filament being provided with a crossbar 3 at one end engaging one end wall of the tube so that when tension is applied to the other end of the filament it is stretched axially within the tube, sealing the other end 10 of the tube remote from the crossbar, connecting the. open unsealed end of the tube to. a vacuum head, exhausting and filling the tube through the head, press sealing the tube at a short distance from its. open end and severing the extra length of tube 17 outside the seal 15. A thin groove 16 may be provided to simplify this last operation.. End caps are then fitted to the envelope and the crossbar 3 and surplus wire is cut off. The filament is of coiled tungsten wire supported by spacers 11, and the envelope may be filled with nitrogen, argon, bromine or iodine.
GB3299569A 1968-06-28 1969-06-30 Method of manufacturing lamps Expired GB1212329A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74106668A 1968-06-28 1968-06-28

Publications (1)

Publication Number Publication Date
GB1212329A true GB1212329A (en) 1970-11-11

Family

ID=24979240

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3299569A Expired GB1212329A (en) 1968-06-28 1969-06-30 Method of manufacturing lamps

Country Status (1)

Country Link
GB (1) GB1212329A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143949A (en) * 1983-07-26 1985-02-20 Boc Group Plc Filament support
EP0358061A2 (en) * 1988-09-06 1990-03-14 General Electric Company Electric incandescent lamp and method of manufacture therefor
AU2005211529B2 (en) * 2005-02-18 2007-09-13 Lg Electronics Inc. Lamp

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143949A (en) * 1983-07-26 1985-02-20 Boc Group Plc Filament support
EP0358061A2 (en) * 1988-09-06 1990-03-14 General Electric Company Electric incandescent lamp and method of manufacture therefor
EP0358061A3 (en) * 1988-09-06 1991-03-27 General Electric Company Electric incandescent lamp and method of manufacture therefor
AU2005211529B2 (en) * 2005-02-18 2007-09-13 Lg Electronics Inc. Lamp
US7705526B2 (en) 2005-02-18 2010-04-27 Lg Electronics Inc. Lamp with twisted filament structure

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee