US2313025A - Mold for manufacturing electric discharge vessels - Google Patents

Mold for manufacturing electric discharge vessels Download PDF

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Publication number
US2313025A
US2313025A US311082A US31108239A US2313025A US 2313025 A US2313025 A US 2313025A US 311082 A US311082 A US 311082A US 31108239 A US31108239 A US 31108239A US 2313025 A US2313025 A US 2313025A
Authority
US
United States
Prior art keywords
glass
die
mold
electric discharge
ceramic
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
US311082A
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English (en)
Inventor
Scharfnagel Rudolf
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
Priority to NL50738D priority Critical patent/NL50738C/xx
Priority to DEL92554D priority patent/DE761474C/de
Priority to FR837834D priority patent/FR837834A/fr
Priority to CH203536D priority patent/CH203536A/de
Priority to GB14360/38A priority patent/GB495690A/en
Priority to US207756A priority patent/US2188061A/en
Priority claimed from US207756A external-priority patent/US2188061A/en
Application filed by Individual filed Critical Individual
Priority to US311082A priority patent/US2313025A/en
Application granted granted Critical
Publication of US2313025A publication Critical patent/US2313025A/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
    • 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
    • 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

Definitions

  • This invention relates to methods of manu facturing electric discharge vessels of the kind in which a disc-shaped member of ceramic or similar material is united with the bulb of the vessel by a glass seal arranged as'a coating on such Ceramic member, this member and seal forming a cover for the bulb.
  • a cover is used also to support the electrode system.
  • FIG. 1 is a somewhat diagrammatic sectional view of an electron tube of the type referred to by the invention
  • Fig. 2 is a fragmentary sectional view showing an example of a device for manufacturing one embodiment of the novel cover
  • Fig. 3 is a fragmentary sectional view illustrating an example of a device for manufacturing a second embodiment thereof
  • Fig. 4 is 'a fragmentary sectional view representing a second example of devices for manufacturing covers of the type shown in Fig. 2
  • Fig. 5 is an alternative form of a detail of the arrangement represented in Fig. 4, which issued as Patent No. 2,188,061, January 23, 1940.
  • the electron tube shown in example comprises a bulb A, an electrode system B, leads 6 joined to this system, and a cover composed of 'a ceramic disc-shaped member I and of a glass seal 5.
  • Bulb A may be of a metal or of a suitable glass, and has a flange b to which seal 5 is fastened. Flange b is tapering toward its edge, being intended to be here of foil thickness, or nearly so. If the bulb A is of glass, flange b and seal 5 may be united with each other by the heat of a in the case of a metal bulb, preferably high frequency energy is employed for heating the bulb, thus securing flange b and seal 5 together.
  • Fig. 1 by wayof gas jet, for instance, while c for the leads to pass through heating coils 4.
  • Matrix I, 2 is heated frombelow, T as indicated by the arrows d, in order to melt latter operation may be effected by'the same high frequency coil that in a well known manner serves for outgassing the bulbA.
  • the device represented in Fig. 2 may be used.
  • This device comprises a die 3 and a matrix composedof the ceramic member-I itself and of a plate-shaped part 2 of iron in which member I-is seated.
  • Member I carries the leads 6.
  • the die 3 has bores glass arranged thereon. This glass maybe in'a preheated condition or may be-poured on the matrix, thus being ,appliedthereto inliquid -dondition.
  • 2 is moulded.to.;form a'pressed glass body 5 of disc shape.
  • Part mic member I is by die 3 caused to form a firmly interlocked structure with the glass body 5. Therefore, after removal of the die this structure I, 5 may be removed from matrix part 2 in order to be united with thebulb A of an electron tube in the manner described with referenceito Fig. 1.
  • Memberl may have bores e or recesses into which the material of body 5 may enter. 7 Such bores or recesses may be dispensed with if the porousness of the ceramic material is suflicient.
  • the lower limit of the destraining or release range decisive in member I enable the heat produced by jet I6 to act directly on the disc 5.
  • the circumfer ential portion of disc 5 is protected from a harmful influence of the heat by the chill 2" which has a relatively large mass.' Air ducts g in the chill permit the gas jet IE to be suificiently fine.
  • Bore is is fitted with a lining ll of heat-proof insulating material, such as asbestos or clay.
  • the chill is mounted on a table'IQ that can be raised or lowered by a suitable gearing 20 in order to adjust thev distance by'which member I is spaced from'the jet I6.
  • Die 3" has pins I3 for producing bores in the glass body 5 in accordance with corresponding bores in member; I, while providing body 5 with a glass wart aroundeach such bore.
  • the leads for the electrode system are: fixed after the assembly or or cover I, 5 has been removed from the chill. 1
  • die 3 is replaced by the die 3A shown in'Fig. 5.
  • Die 3A has the whereupon the cover I, 5, 6 may be at once removed from the chill.
  • a gas burner I5 an electric heating device may be employed whose heat radiation is concentrated toward the centre portion 01' memberI by means of a diaphragm.
  • the glass disc 5 instead of being supported by both member I and chill 2" may be held by member I alone, thus being out of contact with thechill. In the case represented, where disc I i is lying on the chill too, it is advisable to degas the metal from which the chill is to be made,
  • the ceramic member I may be previously coated with glass.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
US311082A 1937-05-14 1939-12-27 Mold for manufacturing electric discharge vessels Expired - Lifetime US2313025A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL50738D NL50738C (enrdf_load_stackoverflow) 1937-05-14
DEL92554D DE761474C (de) 1937-05-14 1937-05-15 Abschlusskoerper fuer ein aus Glas oder Metall bestehendes Entladungsgefaess
FR837834D FR837834A (fr) 1937-05-14 1938-05-11 Tube à décharge électrique et dispositif servant à le fabriquer
CH203536D CH203536A (de) 1937-05-14 1938-05-12 Verschlussteil für elektrische Entladungsgefässe.
GB14360/38A GB495690A (en) 1937-05-14 1938-05-13 Improvements in or relating to electric discharge vessels
US207756A US2188061A (en) 1937-05-14 1938-05-13 Electric discharge vessel
US311082A US2313025A (en) 1937-05-14 1939-12-27 Mold for manufacturing electric discharge vessels

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE203536X 1937-05-14
DE140737X 1937-07-14
US207756A US2188061A (en) 1937-05-14 1938-05-13 Electric discharge vessel
US311082A US2313025A (en) 1937-05-14 1939-12-27 Mold for manufacturing electric discharge vessels

Publications (1)

Publication Number Publication Date
US2313025A true US2313025A (en) 1943-03-02

Family

ID=32096932

Family Applications (1)

Application Number Title Priority Date Filing Date
US311082A Expired - Lifetime US2313025A (en) 1937-05-14 1939-12-27 Mold for manufacturing electric discharge vessels

Country Status (5)

Country Link
US (1) US2313025A (enrdf_load_stackoverflow)
CH (1) CH203536A (enrdf_load_stackoverflow)
FR (1) FR837834A (enrdf_load_stackoverflow)
GB (1) GB495690A (enrdf_load_stackoverflow)
NL (1) NL50738C (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455038A (en) * 1944-06-14 1948-11-30 Gen Tire & Rubber Co Apparatus for building tires
US2561520A (en) * 1940-03-27 1951-07-24 Hartford Nat Bank & Trust Co Vacuumtight seal for electrical apparatus and method of forming such seals
US2629971A (en) * 1945-09-14 1953-03-03 Milton D Hare Method of forming glass seals between tubular members
US3167045A (en) * 1961-05-17 1965-01-26 Pure Carbon Company Inc Refractory fixture
US4813991A (en) * 1988-05-20 1989-03-21 Thomson Consumer Electronics, Inc. Universal stem mold for manufacturing a molded glass stem
US4813992A (en) * 1988-05-20 1989-03-21 Thomson Consumer Electronics, Inc. Universal stem mold apparatus
US4824459A (en) * 1988-05-20 1989-04-25 Thomson Consumer Electronics, Inc. Marker pin for a universal stem mold

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2561520A (en) * 1940-03-27 1951-07-24 Hartford Nat Bank & Trust Co Vacuumtight seal for electrical apparatus and method of forming such seals
US2455038A (en) * 1944-06-14 1948-11-30 Gen Tire & Rubber Co Apparatus for building tires
US2629971A (en) * 1945-09-14 1953-03-03 Milton D Hare Method of forming glass seals between tubular members
US3167045A (en) * 1961-05-17 1965-01-26 Pure Carbon Company Inc Refractory fixture
US4813991A (en) * 1988-05-20 1989-03-21 Thomson Consumer Electronics, Inc. Universal stem mold for manufacturing a molded glass stem
US4813992A (en) * 1988-05-20 1989-03-21 Thomson Consumer Electronics, Inc. Universal stem mold apparatus
US4824459A (en) * 1988-05-20 1989-04-25 Thomson Consumer Electronics, Inc. Marker pin for a universal stem mold

Also Published As

Publication number Publication date
FR837834A (fr) 1939-02-21
GB495690A (en) 1938-11-17
NL50738C (enrdf_load_stackoverflow)
CH203536A (de) 1939-03-15

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