GB481940A - Improvements in the sealing of electric lead-in wires into glass envelopes - Google Patents

Improvements in the sealing of electric lead-in wires into glass envelopes

Info

Publication number
GB481940A
GB481940A GB2524636D GB2524636D GB481940A GB 481940 A GB481940 A GB 481940A GB 2524636 D GB2524636 D GB 2524636D GB 2524636 D GB2524636 D GB 2524636D GB 481940 A GB481940 A GB 481940A
Authority
GB
United Kingdom
Prior art keywords
tube
wires
shaft
glass
leading
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
GB2524636D
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical 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 Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Priority to GB2524636D priority Critical patent/GB481940A/en
Publication of GB481940A publication Critical patent/GB481940A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01KELECTRIC INCANDESCENT LAMPS
    • H01K3/00Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/20Sealing-in wires directly into the envelope

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

481,940. Sealing wires into vitreous material. ROBINSON, E. Y., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Sept. 16, 1936, No. 25264. [Class 36] In sealing three or more leading-in wires into glass envelopes, such as thermionic valves, the wires are held in the correct angular or circular spaced relationship by means such as a jig 7 so that they project into the open end of the glass bulb or tube 5 which is softened by the heat of gas flames 18, the glass then being pressed in between the leading-in wires to form inwardly directed tongues which meet and unite with one another to make a vacuum-tight seal and end closure for the bulb or tube 5. The means for holding the wires in the correct relationship may comprise part of the internal electrode structure, such as an insulating crossframe, whilst the tube into which the wires are sealed may constitute the bulb of the valve. In the example the apparatus comprises two coaxial shafts 1, 2 which are rotated at the same speed in the same direction. The shaft 1 is hollow and carries spring-clips 4 which engage the tube 5 and hold it in position. The tube 5 has a reduced extension 6 which fits into the bore 3 of the shaft 1, preferably with such good contact that air or a neutral gas may be blown from the left-hand end of the shaft 1 into the tube 5, or a rubber washer or gasket may be used to obtain a gas-tight union between the tube 5 and shaft 1. The shaft 2 carries the jig or wire-carrier 7 which, in the example has six holes parallel with the axis of the shaft. A collar 11 fixed upon the shaft 2 forms a mounting for pivots 10 for a series of bell-crank levers or fingers 9 which terminate in wedgelike jaws 8, the levers being actuated by links 13 connected to a slidable collar 15 on the shaft 2. The heating is preferably continued after the formation of the seal, to remove the strain from the glass, while the glass may be blown out slightly by carbon dioxide admitted through the tube 1, assisted by centrifugal action. The sealed leading-in wires may be of such thickness that their externally projecting portions may serve as contact pins, or supports therefor. A leading-in wire or a glass exhausting-tube may be sealed into the centre of the tube 5, collapse of the exhausting-tube being prevented by a reinforcing collar or liner such as a longitudinally split collar which may subsequently be removed. Specification 369,349, [Group XL], is referred to.
GB2524636D 1936-09-16 1936-09-16 Improvements in the sealing of electric lead-in wires into glass envelopes Expired GB481940A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2524636D GB481940A (en) 1936-09-16 1936-09-16 Improvements in the sealing of electric lead-in wires into glass envelopes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2524636D GB481940A (en) 1936-09-16 1936-09-16 Improvements in the sealing of electric lead-in wires into glass envelopes

Publications (1)

Publication Number Publication Date
GB481940A true GB481940A (en) 1938-03-16

Family

ID=10224577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2524636D Expired GB481940A (en) 1936-09-16 1936-09-16 Improvements in the sealing of electric lead-in wires into glass envelopes

Country Status (1)

Country Link
GB (1) GB481940A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2660004A (en) * 1950-06-28 1953-11-24 Rca Corp Support fixture for supporting pronged structures
US2816398A (en) * 1952-02-23 1957-12-17 Gen Electric Apparatus for manufacture of a quartzto-metal foil press seal
US2844919A (en) * 1951-03-21 1958-07-29 Gen Electric Quartz-to-metal foil press seal
US2886336A (en) * 1956-09-28 1959-05-12 Rca Corp Toggle actuated bulb clamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2660004A (en) * 1950-06-28 1953-11-24 Rca Corp Support fixture for supporting pronged structures
US2844919A (en) * 1951-03-21 1958-07-29 Gen Electric Quartz-to-metal foil press seal
US2816398A (en) * 1952-02-23 1957-12-17 Gen Electric Apparatus for manufacture of a quartzto-metal foil press seal
US2886336A (en) * 1956-09-28 1959-05-12 Rca Corp Toggle actuated bulb clamp

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