GB542399A - Improvements relating to machines for manufacturing electric lamps and similar devices - Google Patents

Improvements relating to machines for manufacturing electric lamps and similar devices

Info

Publication number
GB542399A
GB542399A GB14469/40A GB1446940A GB542399A GB 542399 A GB542399 A GB 542399A GB 14469/40 A GB14469/40 A GB 14469/40A GB 1446940 A GB1446940 A GB 1446940A GB 542399 A GB542399 A GB 542399A
Authority
GB
United Kingdom
Prior art keywords
turret
cage
flange
electric lamps
heating
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
GB14469/40A
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
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB542399A publication Critical patent/GB542399A/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
    • H01J5/20—Seals between parts of vessels
    • H01J5/22—Vacuum-tight joints between parts of vessel
    • H01J5/24—Vacuum-tight joints between parts of vessel between insulating parts of vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0033—Vacuum connection techniques applicable to discharge tubes and lamps
    • H01J2893/0037—Solid sealing members other than lamp bases
    • H01J2893/0038—Direct connection between two insulating elements, in particular via glass material
    • H01J2893/0039—Glass-to-glass connection, e.g. by soldering
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S65/00—Glass manufacturing
    • Y10S65/04—Electric heat

Landscapes

  • Package Closures (AREA)
  • Resistance Heating (AREA)

Abstract

542,399. Making electric lamps &c. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 23, 1940, No. 14469. Convention date, Sept. 22, 1939. Addition to 521,918, [Group XXIII]. [Class 39 (ii)] [Also in Group XXIII] Relates to apparatus for sealing stems to the bulbs of electric lamps and similar devices by'the method, described in the parent Speci. fication, in which the assembled glass parts are fused together by heat conducted from a disc which 'is heated by indirect electric currents. The present invention consists of a machine for carrying out the method automatically. The machine comprises a number of heads 10, Fig. 2, mounted on a turret 11 which is rotated step-by-step about a hollow vertical column 65. Each head comprises a cage 12 for supporting a lamp stem 17, Fig. 3 and jaws 14, 15 for gripping a tubular glass envelope 13. The cage 12 comprises a holder 21 having a central aperture through which the exhaust tube 18 and the leading-in wires 19. 20 are threaded, and an annular heating-element 23 in which the flange 22 of the stem tube rests. The holder 21 is made of a non-metallic and non-conducting material, such as asbestos or sillimanite, while the element 23 is made of an electrically-conducting material, such as carbon, which does not stick to glass. When the glass parts have been placed in a head they are carried by the movement of the turret to a station where hollow, watercooled coils 52, connected to a source of highfrequency current, are moved up about the cage 12 so as to induce current in the heating-element 23 sufficient to cause the rims of flange 22 and the bulb 13 to be fused and seal together. The jaws 14, 15 are movable vertically by a spring and a lever 47 which can be rocked at the heating-station, by a cross arm 53 mounted on a vertical reciprocating rod 54 to allow the envelope 13 to be pressed into contact with the flange 22 to ensure a seal. After being sealed at one end, the envelopes are removed and they may be inverted and restored to the machine for sealing at the other end, the number of heads used being arranged to make two complete operations for each rotation of the turret.
GB14469/40A 1939-09-22 1940-09-23 Improvements relating to machines for manufacturing electric lamps and similar devices Expired GB542399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US296064A US2361517A (en) 1939-09-22 1939-09-22 Sealing apparatus

Publications (1)

Publication Number Publication Date
GB542399A true GB542399A (en) 1942-01-07

Family

ID=23140458

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14469/40A Expired GB542399A (en) 1939-09-22 1940-09-23 Improvements relating to machines for manufacturing electric lamps and similar devices

Country Status (3)

Country Link
US (1) US2361517A (en)
FR (1) FR867138A (en)
GB (1) GB542399A (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560007A (en) * 1943-10-20 1951-07-10 Steele Arthur Apparatus for securing a handle to a cup or other hollow ware article made of earthenware or china
US2494870A (en) * 1944-02-17 1950-01-17 Gen Electric Apparatus for sealing glass and metal members
US2470285A (en) * 1944-03-30 1949-05-17 Rca Corp Radio frequency apparatus for heating metallic articles of large surface area to volume ratio
US2531008A (en) * 1944-04-14 1950-11-21 Gen Electric Sealing-in method and apparatus
US2512277A (en) * 1944-06-22 1950-06-20 Gen Electric Holder for lamp bulbs and similar articles
US2477129A (en) * 1945-11-03 1949-07-26 Western Electric Co High-frequency induction brazing apparatus
US2492162A (en) * 1946-05-15 1949-12-27 Standard Telephones Cables Ltd Method and apparatus for sealing electrodes in envelopes of electron discharge tubes
US2445822A (en) * 1946-10-16 1948-07-27 Briechle Joseph Timing and positioning mechanism for dial feeding machines
US2676242A (en) * 1947-03-25 1954-04-20 Hartford Nat Bank & Trust Co Device for treating workpieces through inductive heating in a high-frequency magnetic field
US2454039A (en) * 1947-06-28 1948-11-16 Gen Electric High-frequency induction heating apparatus
US2634121A (en) * 1948-12-15 1953-04-07 Borg Warner Apparatus for handling and surfacehardening articles
US2663120A (en) * 1950-09-21 1953-12-22 Western Electric Co Apparatus for forming articles
US2803732A (en) * 1952-01-17 1957-08-20 Sylvania Electric Prod High-speed r. f. sealing
US2775070A (en) * 1954-01-29 1956-12-25 Sylvania Electric Prod Sealing apparatus for mercury arc discharge tubes
US2807913A (en) * 1954-12-10 1957-10-01 Rca Corp Sealing apparatus for electron tubes
US2877603A (en) * 1955-04-01 1959-03-17 Hughes Aircraft Co Object joining and sealing device
US4527032A (en) * 1982-11-08 1985-07-02 Armco Inc. Radio frequency induction heating device
GB8327598D0 (en) * 1983-10-14 1983-11-16 Akzo Nv Pharmacologically active diarylindane-13-diones
US5334333A (en) * 1990-12-17 1994-08-02 Elf Atochem North America, Inc. Electroactive compounds, compositions and devices and methods of making the same

Also Published As

Publication number Publication date
US2361517A (en) 1944-10-31
FR867138A (en) 1941-10-01

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