US2499197A - Metal envelope electric discharge device - Google Patents

Metal envelope electric discharge device Download PDF

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Publication number
US2499197A
US2499197A US61774A US6177448A US2499197A US 2499197 A US2499197 A US 2499197A US 61774 A US61774 A US 61774A US 6177448 A US6177448 A US 6177448A US 2499197 A US2499197 A US 2499197A
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envelope
tubulation
metal
ampule
discharge device
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US61774A
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William T Posey
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General Electric Co
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General Electric Co
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    • 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
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • H01J9/395—Filling vessels

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  • My invention relates to metal envelope electric discharge devices of the type employing an ionizable medium and, particularly, to an improved construction for facilitating the charging of such devices with a predetermined quantity of ionizable medium.
  • I provide a novel construction which permits charging of metal envelope devices with a predetermined quantity of ionizable medium by shattering an ampule containing the medium by mechanical deformation of a part of the envelope.
  • Fig. l is an elevational View, partially in section, of a metal envelope device embodying my invention
  • Fig. 2 is an enlarged perspective view of a supporting structure for the ampule as employed in the device of Fig. 1
  • Fig. 3 is an enlarged elevational view, in section, of the tubulation of the device of Fig. 1 prior to sealing off
  • Fig. 4 is a similar enlarged elevational view after sealing off and after the ampule has been shattered by deformation of the tubulation.
  • a metal envelope type discharge device including a generally cylindrical metal envelope l which is closed at its lower end by an inverted cup-shaped metal header 2 which is bonded, as by welding, to the lower end of the envelope I.
  • An elongated metal tubulation 3 communicates with the interior of the envelope I through the header 2 and is joined to the header by an outwardly extending flange 4 which is preferably welded to the inner surface of the header.
  • the tubulation is provided at its lower extremity with a portion 5 of reduced cross section which, in the complete tube, is welded together at its lower end, as indicated at 6. As shown in Fig.
  • a glass ampule 1 containing a quantity of mercury 8 and, if desired, also a quantity of gas 9 is housed by and supported within the tubulation by a pair of opposed hollow metal members I0 which are joined together in longitudinally offset relationship to provide openings II and I2 through which the ionizable medium may readily escape upon shattering of the ampule 1.
  • the support and enclosure thus formed are supported in that portion of the tubulation extending below the tube envelope I by a wire I 3 which is bonded to one of the members Ill and to the flange 4 of the tubulation.
  • the tubulation is in the form shown in Fig. 3 while exhaust of the device takes place. After exhaust is complete, the lower end of the tubulation is sealed off, as shown at 6 in Figs. 1 and 4. Subsequently, the tubulation is deformed by suitable dies It in the region of the ampule 1 to reduce the cross section of the tubulation sufficiently to shatter the ampule and release the ionizable medium.
  • the openings II and ii! are sufliciently small to retain most of the glass within the casing formed by the metal parts In.
  • the electrodes of the device have not been illustrated. It will be appreciated that when the invention is applied to a thyratron having a metal envelope that an anode, a control grid and a thermionic cathode will be supported within the envelope in mutually insulated relation.
  • the present invention provides a very simple structure making it possible to introduce the ionizable medium within metal envelope devices by means of an ampule and that the shattering of the ampule by a mechanical deformation of the tubulation is easily and positively accomplished.
  • An electric discharge device of the type utilizing an ionizable medium comprising a metal envelope, a metal tubulation extending from said envelope, a frangible ampule containing a quan-.
  • An electric discharge device of the type utilizing an ionizable medium comprising: almetalz envelope closed at one end by a: headerya' metal tubulation extending from said header and beyond the sidewall of said envelope, adeformable: support positioned in said tubulation and having,
  • a frangible ampule contain' ing a quantity of ionizable medium positioned within said support so that said ampule may be shattered and said medium liberated through said opening by deformation of said tubulation and said support.

Description

Feb. 28, 1950 w, PosEY 2,499,197
METAL ENVELOPE ELECTRIC DISCHARGE DEVICE Filed NOV. 24, 1948 Fg/ W /3 Fig. 5.
Inventor: William T Pese a,
Patented Feb. 28, i956 METAL'ENVELOPE EL Eo'raio DISCHARGE DEVICE William T. Pusey, Schenectady, N. Y. assignor to General Electric Company, a corporation of New York Application November 24, 1948, Serial No. 61,774
' 2 Claims. (01. 250-215) My invention relates to metal envelope electric discharge devices of the type employing an ionizable medium and, particularly, to an improved construction for facilitating the charging of such devices with a predetermined quantity of ionizable medium.
It has been customary to introduce an ionizable medium, such as mercury or a gas or a combination of the two, into discharge devices having a glass envelope by placing an ampule containing the medium within the envelope in such a position that it may be shattered by high frequency induction at a desired time in the processing of the device. It is not possible to do this for metal envelope discharge devices due to the complete shielding action of the metal envelope. Automatic injection apparatus has been provided on exhaust machines for supplying the ionizable medium to discharge devices of this type and, while this method has in general been satisfactory, it materially increases the cost of manufacture and the complication of the exhaust machines. In accordance with an important aspect of my invention, I provide a novel construction which permits charging of metal envelope devices with a predetermined quantity of ionizable medium by shattering an ampule containing the medium by mechanical deformation of a part of the envelope.
The objects and advantages that characterize my invention will become more apparent as the following description proceeds, reference being had to the accompanying drawing in which Fig. l is an elevational View, partially in section, of a metal envelope device embodying my invention; Fig. 2 is an enlarged perspective view of a supporting structure for the ampule as employed in the device of Fig. 1; Fig. 3 is an enlarged elevational view, in section, of the tubulation of the device of Fig. 1 prior to sealing off; and Fig. 4 is a similar enlarged elevational view after sealing off and after the ampule has been shattered by deformation of the tubulation.
Referring now to the drawing, I have shown my invention as employed in a metal envelope type discharge device including a generally cylindrical metal envelope l which is closed at its lower end by an inverted cup-shaped metal header 2 which is bonded, as by welding, to the lower end of the envelope I. An elongated metal tubulation 3 communicates with the interior of the envelope I through the header 2 and is joined to the header by an outwardly extending flange 4 which is preferably welded to the inner surface of the header. The tubulation is provided at its lower extremity with a portion 5 of reduced cross section which, in the complete tube, is welded together at its lower end, as indicated at 6. As shown in Fig. 3, a glass ampule 1 containing a quantity of mercury 8 and, if desired, also a quantity of gas 9 is housed by and supported within the tubulation by a pair of opposed hollow metal members I0 which are joined together in longitudinally offset relationship to provide openings II and I2 through which the ionizable medium may readily escape upon shattering of the ampule 1. The support and enclosure thus formed are supported in that portion of the tubulation extending below the tube envelope I by a wire I 3 which is bonded to one of the members Ill and to the flange 4 of the tubulation.
The tubulation is in the form shown in Fig. 3 while exhaust of the device takes place. After exhaust is complete, the lower end of the tubulation is sealed off, as shown at 6 in Figs. 1 and 4. Subsequently, the tubulation is deformed by suitable dies It in the region of the ampule 1 to reduce the cross section of the tubulation sufficiently to shatter the ampule and release the ionizable medium. The openings II and ii! are sufliciently small to retain most of the glass within the casing formed by the metal parts In.
In the interest of simplifying the drawing, the electrodes of the device have not been illustrated. It will be appreciated that when the invention is applied to a thyratron having a metal envelope that an anode, a control grid and a thermionic cathode will be supported within the envelope in mutually insulated relation.
It will be apparent from the foregoing description that the present invention provides a very simple structure making it possible to introduce the ionizable medium within metal envelope devices by means of an ampule and that the shattering of the ampule by a mechanical deformation of the tubulation is easily and positively accomplished.
While I have shown and described my invention by reference to a particular embodiment thereof, it will of course be understood that I do not wish to be limited thereto since various modifications may be made, and I contemplate by the appended claims to cover any such modifications as fall within the true spirit and scope of my invention.
What I claim as new and desire to secure by Letters Patent of the United States is:
1. An electric discharge device of the type utilizing an ionizable medium comprising a metal envelope, a metal tubulation extending from said envelope, a frangible ampule containing a quan-.
envelope; a perforatedldeformable support'in-said tubulation, a frangible ampule containing a quantity of ionizable medium within said support so 10 that said ampule may be shattered andsaid medium liberated by deformationofsa'id' tubulat'iom 3. An electric discharge device of the type utilizing an ionizable medium: comprising: almetalz envelope closed at one end by a: headerya' metal tubulation extending from said header and beyond the sidewall of said envelope, adeformable: support positioned in said tubulation and having,
an opening therein, a frangible ampule contain' ing a quantity of ionizable medium positioned within said support so that said ampule may be shattered and said medium liberated through said opening by deformation of said tubulation and said support.
' T; POSEY.
REFERENCES CITED The following references are of record in the file ofthis patent:
UNITED STATES PATENTS Number Name Date 1,23-I,4I6 Needham June 26, 1917 1,841,034 Ives- Jan. 12, 1932 2,091,915" Elder. ..1 Aug. 31, 1937 2,150,770 Kingdon Mar. 14, 1949
US61774A 1948-11-24 1948-11-24 Metal envelope electric discharge device Expired - Lifetime US2499197A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640945A (en) * 1950-02-01 1953-06-02 Rca Corp Introduction of active materials into evacuated envelopes
US3225910A (en) * 1961-02-04 1965-12-28 Porta Paolo Della Getter devices with non-evaporated gettering material, for maintaining vacuum in electronic tubes
US3560789A (en) * 1969-01-31 1971-02-02 Rca Corp Gaseous electric discharge tube including a plurality of puncturable gas storage cells
WO2004042776A2 (en) * 2002-11-08 2004-05-21 Vladimirov Oleksandr V Introducing mercury into a discharge lamp

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1231416A (en) * 1916-01-19 1917-06-26 Gen Electric Manufacture of incandescent lamps.
US1841034A (en) * 1928-12-21 1932-01-12 Western Electric Co Electrooptical apparatus
US2091915A (en) * 1935-05-04 1937-08-31 Gen Electric Electric discharge device
US2150770A (en) * 1937-01-26 1939-03-14 Gen Electric Electrical discharge device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1231416A (en) * 1916-01-19 1917-06-26 Gen Electric Manufacture of incandescent lamps.
US1841034A (en) * 1928-12-21 1932-01-12 Western Electric Co Electrooptical apparatus
US2091915A (en) * 1935-05-04 1937-08-31 Gen Electric Electric discharge device
US2150770A (en) * 1937-01-26 1939-03-14 Gen Electric Electrical discharge device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640945A (en) * 1950-02-01 1953-06-02 Rca Corp Introduction of active materials into evacuated envelopes
US3225910A (en) * 1961-02-04 1965-12-28 Porta Paolo Della Getter devices with non-evaporated gettering material, for maintaining vacuum in electronic tubes
US3560789A (en) * 1969-01-31 1971-02-02 Rca Corp Gaseous electric discharge tube including a plurality of puncturable gas storage cells
WO2004042776A2 (en) * 2002-11-08 2004-05-21 Vladimirov Oleksandr V Introducing mercury into a discharge lamp
WO2004042776A3 (en) * 2002-11-08 2004-07-01 Oleksandr V Vladimirov Introducing mercury into a discharge lamp

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