US2338381A - Method of assembling lead-in conductors for vacuum tubes - Google Patents

Method of assembling lead-in conductors for vacuum tubes Download PDF

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Publication number
US2338381A
US2338381A US381303A US38130341A US2338381A US 2338381 A US2338381 A US 2338381A US 381303 A US381303 A US 381303A US 38130341 A US38130341 A US 38130341A US 2338381 A US2338381 A US 2338381A
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US
United States
Prior art keywords
conductors
vacuum tubes
ring
glass
dies
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
US381303A
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English (en)
Inventor
Lohmann Franz
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2338381A publication Critical patent/US2338381A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/32—Sealing leading-in conductors

Definitions

  • This invention relates to the manufacture of discs or cups made of pressed glass and carrying electric conductors in order to serve as the bottom of electron tubes, these conductors being the inleads thereof.
  • Fig. 1 is a sectional view showing a structure of this kind
  • Fig. 2 is a partially sectioned view of a device according to the present invention used in the manufacture of such structures.
  • the structure or article to be manufactured consists of a disc A, made of pressed glass, and conductors 2 sealed into this disc.
  • the disc A may be cup-shaped.
  • the dies l, 5 are both arranged to revolve on a horizontal axis, as will be seen in Fig. 2, and the vitreous material for making the disc A is in the shape of a ring 6 supported by conductors 2 and midway between the dies.
  • the vitreous material is thus easier to heat and the gas Jet 4 hence may be less intense than in the case of former devices in which the glass mass is supported in contact with the surface of a metal die.
  • the gas jet 4 is adjusted so that the dies shall not be unduly heated.
  • the softening glass is prevented from dripping.
  • the glass also does not contact with the dies until the pressing operation takes place.
  • the loss of heat of the glass is less than in the case of prior devices where the glass is heated while in contact with the surface of a die. Furthermore, the expenditure in heat being less than in the case of such prior devices, the conductors 2 are less liable to oxidize and thereby to deteriorate the glass from which the disc A is to be made. Moreover, as the conductors 2 are located at their ends in the dies I, I they are cooled by the dies, which thus in their turn aim to prevent the conductors from oxidizing.
  • the conductors 2 are mounted in the recesses B of die I and the glass ring 6 is inserted over these conductors, whereupon the die 5, having bores C for receiving the conductors 2, is likewise inserted over them.
  • the structure I, 2, 6, 5 is then set rotating while at the same time the ring 8 is softened by the gas jet 4.
  • die 5 is advanced toward die I so that ring 6 is compressed and thus converted into the disc A into which at the same time the conductors 2 are sealed.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Joining Of Glass To Other Materials (AREA)
US381303A 1940-02-08 1941-03-01 Method of assembling lead-in conductors for vacuum tubes Expired - Lifetime US2338381A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE216812X 1940-02-08

Publications (1)

Publication Number Publication Date
US2338381A true US2338381A (en) 1944-01-04

Family

ID=5830394

Family Applications (1)

Application Number Title Priority Date Filing Date
US381303A Expired - Lifetime US2338381A (en) 1940-02-08 1941-03-01 Method of assembling lead-in conductors for vacuum tubes

Country Status (5)

Country Link
US (1) US2338381A (enrdf_load_stackoverflow)
BE (1) BE440444A (enrdf_load_stackoverflow)
CH (1) CH216812A (enrdf_load_stackoverflow)
FR (1) FR870783A (enrdf_load_stackoverflow)
NL (1) NL55537C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2706366A (en) * 1950-11-25 1955-04-19 Bell Telephone Labor Inc Method of constructing a helix assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2706366A (en) * 1950-11-25 1955-04-19 Bell Telephone Labor Inc Method of constructing a helix assembly

Also Published As

Publication number Publication date
BE440444A (enrdf_load_stackoverflow)
CH216812A (de) 1941-09-15
FR870783A (fr) 1942-03-24
NL55537C (enrdf_load_stackoverflow)

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