US2528246A - Electric discharge tube with locating member - Google Patents

Electric discharge tube with locating member Download PDF

Info

Publication number
US2528246A
US2528246A US790103A US79010347A US2528246A US 2528246 A US2528246 A US 2528246A US 790103 A US790103 A US 790103A US 79010347 A US79010347 A US 79010347A US 2528246 A US2528246 A US 2528246A
Authority
US
United States
Prior art keywords
locating member
bulb
tube
electric discharge
glass
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
US790103A
Other languages
English (en)
Inventor
Roovers Wilhelmus Antonius
Otto Louis Van Steenis
Jong Isidorus Johannes Mari De
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2528246A publication Critical patent/US2528246A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels

Definitions

  • This invention relates to electric discharge tubes and more particularly to tubes comprising a locating member.
  • a locating member provided on the external periphery of the tube, in which event the lower extremity of the tube itself serves for centering.
  • the locating member is then formed in the shape of a thickened portion of the wall of a moulded tube bottom or of a moulded bulb.
  • said locating member is required to be provided at preferably at least 5 mm. from the place of sealing.
  • such a construction is not suitable for tubes having a plane base disc secured to a thin-walled, blown glass bulb.
  • an electric discharge tube having a thin-walled blown glass bulb is provided with a protuberance in the bulb wall, the thickness of the protuberance being smaller or at the utmost equal to the thickness of the bulb wall.
  • the protuberance is filled up with glaze or similar material that adheres well to the glass. should exhibit approximately the same coefiicient of expansion as the glass and should be of low melting point so that, upon heating, it will melt before the glass of the protuberance softens.
  • An electric discharge tube provided with the locating member according to the invention has the following advantages.
  • the wall thickness of the bulb is substantially even so that the disr tance between the locating member and the place of scaling is not of critical importance.
  • such a protuberance may be formed in verysimple manner, for instance by local heat-f ing of' the bulb after being shaped and by push, ing the glass of the bulb outwardly by means of a small metal rod consisting of a metal having a high melting point, such as tungsten.
  • the afore-mentioned method has the further ad vantage that the glass rapidly cools down on being touched by the tungsten rod and hence will be less soft than the surrounding glass, thus pre-l venting the wall-thickness at the top of the pro-. tuberance from becoming too small. This is of great importance since it is just the top of the protuberance which has to be resistant to the heaviest shocks.
  • the thin-Walled mem: ber Due to the filling of the protuberance with glaze or similar material, the thin-Walled mem: ber withstands even rough handling which other-r wise might cause breakage. Since the filler is not integral with the glass wall, as is the case with the glass of a locating member formed by a locally thicker portion of the glass wall, the disadvantages of such a solid locating member, that is the danger of cracking due to internal strain, do not occur in this case, while the advantages of such a solid member are still present.
  • tuberance does not serve as a locating member. Such a protuberance of comparatively large size may, however, readily be formed during blowing. Furthermore, it is known to keep a tube in position in a holder by means of springs which engage in one or more re-entrant parts provided in the wall of the bulb. However, such a re,- entrant part cannot serve as a locating member and does not cause such difficulty on being formed since a re-entrant part may readily be formed already during blowing, as its top runs little risk of being damaged.
  • Fig. 1 is a sectional view of a locating member according to the invention.
  • Fig. 2 is a plan view of such a locating member.
  • reference numeral I indicates the thin-walled blown glass bulb which is closed by means of a base 2. Pins 3 are sealed into the base 2.
  • the bulb exhibits a locating member 4, which is constituted by a protuberance having a wall thickness substantially equal to that of the bulb, the protuberance being filled up with glaze 5.
  • a filled-up locating member is of substantially the same rigidity as a locating member of solid glass without exhibiting the disadvantages of the latter.
  • a spring may embrace the locating member 4 in known manner.
  • the tubes Since no metal parts are required for the centering and locating operations, such a tube is highly adapted for use on high frequencies. Furthermore, the tubes may be of very small size without the positioning of the locating member causing diificulty.
  • An electric discharge tube comprising a thin walled cylindrical blown glass bulb having a longitudinal axis, a protuberant locating member portion of said bulb radially offset from said longitudinal axis of said bulb, said portion having a wall thickness substantially equal to that of the said bulb, and a filling material in said protube-rant portion reinforcing said protuberant portion, said material consisting of a glaze of a melting point lower than and a temperature coefiicient of expansion substantially equal to that of the glass of said protuberant portion.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
US790103A 1946-10-11 1947-12-06 Electric discharge tube with locating member Expired - Lifetime US2528246A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL262420X 1946-10-11

Publications (1)

Publication Number Publication Date
US2528246A true US2528246A (en) 1950-10-31

Family

ID=19781570

Family Applications (1)

Application Number Title Priority Date Filing Date
US790103A Expired - Lifetime US2528246A (en) 1946-10-11 1947-12-06 Electric discharge tube with locating member

Country Status (7)

Country Link
US (1) US2528246A (fr)
BE (1) BE476683A (fr)
CH (1) CH262420A (fr)
DE (1) DE844948C (fr)
FR (1) FR954134A (fr)
GB (1) GB650045A (fr)
NL (1) NL65818C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155862A (en) * 1960-05-31 1964-11-03 Gen Electric Canada Index indicator for plug-in units

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1788147A (en) * 1927-06-22 1931-01-06 William M Bruce Attachment for wireless receivers
US1861167A (en) * 1921-10-29 1932-05-31 Vello Leopoldo Sanchez Bulb, tube, or other hermetically closed receptacle for incandescent electric lamps and similar devices and process of manufacture of the same
US1911410A (en) * 1932-06-02 1933-05-30 Valverde Robert Method of sealing containers under predetermined pressures
US2067817A (en) * 1934-09-15 1937-01-12 Gen Electric Device for gettering metal tubes
US2222395A (en) * 1939-07-14 1940-11-19 Ass Press Tubular phototube
US2329019A (en) * 1941-10-06 1943-09-07 Heintz & Kaufman Ltd Vitreous seal protector
US2454791A (en) * 1945-01-16 1948-11-30 Standard Telephones Cables Ltd Vacuum tube and mounting therefor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE626737C (de) * 1929-06-18 1936-03-02 Loewe Opta Gmbh Mehrfachroehre mit einer Endverstaerkerstufe und einer oder mehreren Spannungsverstaerkerstufen
BE443690A (fr) * 1940-12-13
FR890740A (fr) * 1942-02-11 1944-02-16 Telefunken Gmbh Procédé pour la fabrication d'un tube à décharge électrique sans culot

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1861167A (en) * 1921-10-29 1932-05-31 Vello Leopoldo Sanchez Bulb, tube, or other hermetically closed receptacle for incandescent electric lamps and similar devices and process of manufacture of the same
US1788147A (en) * 1927-06-22 1931-01-06 William M Bruce Attachment for wireless receivers
US1911410A (en) * 1932-06-02 1933-05-30 Valverde Robert Method of sealing containers under predetermined pressures
US2067817A (en) * 1934-09-15 1937-01-12 Gen Electric Device for gettering metal tubes
US2222395A (en) * 1939-07-14 1940-11-19 Ass Press Tubular phototube
US2329019A (en) * 1941-10-06 1943-09-07 Heintz & Kaufman Ltd Vitreous seal protector
US2454791A (en) * 1945-01-16 1948-11-30 Standard Telephones Cables Ltd Vacuum tube and mounting therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155862A (en) * 1960-05-31 1964-11-03 Gen Electric Canada Index indicator for plug-in units

Also Published As

Publication number Publication date
GB650045A (en) 1951-02-14
CH262420A (de) 1949-06-30
FR954134A (fr) 1949-12-19
DE844948C (de) 1952-07-28
BE476683A (fr)
NL65818C (fr)

Similar Documents

Publication Publication Date Title
US3914000A (en) Method of making tubeless gas panel
US2359483A (en) Vitreous electrical device and its fabrication
US4395378A (en) Method for making an injection stretch blow molded container with an integral tab
US2030185A (en) Stem for electron discharge devices
US2528246A (en) Electric discharge tube with locating member
US2135661A (en) Gaseous electric discharge device
US1861167A (en) Bulb, tube, or other hermetically closed receptacle for incandescent electric lamps and similar devices and process of manufacture of the same
US1560690A (en) Electron-discharge device
US4704093A (en) High pressure sodium vapor lamp with improved ceramic arc tube
US2321600A (en) Method of making molded stems
US2340879A (en) Method of making molded stems
US2569723A (en) Envelope for electric devices
US2030186A (en) Stem making apparatus
US2499834A (en) Second anode contact for cathode-ray tubes
US2078892A (en) Vacuum tube and method of making the same
US2221868A (en) Glass-to-metal seal
USRE21163E (en) Stem for electron discharge devices
GB670201A (en) Improvements in and relating to electric lamps and similar devices
US2694273A (en) Method of tipless sealing of vitreous envelopes
US2427096A (en) Electrical device and molded stem therefor
US2428059A (en) Sealing of wires into glass
US3264080A (en) Method for forming rectangular face plate
US2583388A (en) Conducting seal for high-pressure lamps
US3408719A (en) Method of assembling lamp filament and support structure
US2024748A (en) Method of manufacturing glassware and apparatus therefor