US3876894A - Button overvoltage arrester with cup-shaped electrodes with different side and end wall thicknesses - Google Patents

Button overvoltage arrester with cup-shaped electrodes with different side and end wall thicknesses Download PDF

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Publication number
US3876894A
US3876894A US076501A US7650170A US3876894A US 3876894 A US3876894 A US 3876894A US 076501 A US076501 A US 076501A US 7650170 A US7650170 A US 7650170A US 3876894 A US3876894 A US 3876894A
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US
United States
Prior art keywords
thickness
electrodes
insulating member
button
overvoltage arrester
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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
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US076501A
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English (en)
Inventor
Gerhard Peche
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Siemens AG
Siemens Corp
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Siemens Corp
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Filing date
Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
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Publication of US3876894A publication Critical patent/US3876894A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/20—Means for starting arc or facilitating ignition of spark gap
    • H01T1/22—Means for starting arc or facilitating ignition of spark gap by the shape or the composition of the electrodes

Definitions

  • a button overvoltage arrester is provided with frustroconical cup-shaped electrodes each of which have an active area electrode wall thickness of at least twice the thickness of the conical side wall to prevent burning of the electrodes and to promote heat dissipation via the respective lead conductors which are connected to the electrode active areas.
  • the cup-shaped electrodes are formed by drawing cups from a flat metal plate, preferably a Ni-Fe-Co alloy.
  • This invention relates to a symmetrical overvoltage arrester with a gas-tight housing in which the electrodes are arranged opposite each other, which electrodes are designed frustum-shaped and which are inserted and sealed in a gas-tight manner into the ends of a tubular insulating member with their acts turned to each other.
  • buttons arresters are generally known. They have the name button arrester, due to their shape. Button arresters, among other things, have the advantages that they allow particularly small dimensions and that the areas where the electrodes and the insulating member meet are not stressed by currents which flow through the electrodes if the electrode bottom has lead wire connections.
  • an essential problem with button arresters is the heat capacitance of the electrodes in the range of their active electrode surfaces. To avoid that the insulator electrode connection is heated excessively, which heating might cause the connection to become loose, the electrodes are provided with such thin walls that the heat is dissipated primarily via the feed lines.
  • the electrodes be frustum-shaped electrodes having a wall thickness, in the range of the active electrode surfaces, which is several times higher than the wall thickness of the conical side walls in the range of the transition to the insulating member.
  • the wall thickness which, in the range of the active electrode surface, is several times higher, must thereby differ sensibly, i.e., at least the factor 2, from the wall thickness of the side walls.
  • An essential advantage of this invention is that the efficiency of a button arrester is essentially increased since, onone hand, heat conductivity from the active electrode surfaces via the thin wall thickness of the side walls is strongly hindered while, on the other hand, the active electrode surfaces accomodate essentially higher heat loads due to the wall thickness which is several times higher in the active surface areas without danger of destruction, to transfer the heat loads to the current that of the conical side walls might be 0.3 mm at an average.
  • a preferred method for the production of an overvoltage arrester according to this invention consists in producing the frustum shaped electrodes in a drawing process in which the conical side walls are pulled out of a small metal plate, the wall thickness of which plate corresponds to the wall thickness in the range of the active electrode surface, and which, during the pulling process, is reduced in its wall thickness to the desired measure in the range of the conical side walls.
  • the drawing shows a button arrester with frustumshaped electrodes 3 and 3 which are inserted and sealed gas-tightly into a tubular insulating member 1, with their arcs turned to each other.
  • ceramic serves as material for the insulating member 1, while the electrodes 2 and 3 consist of a Ni-Fe-Co alloy.
  • Massive, metallic contact pieces 8 and 9 can be soldered hard against the electrodes 2 and 3, to form the feed lines of the button arrester. The contact pieces 8 and 9 thereby can be measured in their axial diameter in a way that they, corresponding to the wall thickness of the electrodes, eliminate sufficient amounts of heat in active range.
  • the frustum-shaped electrodes 2 and 3 have active surfaces 4 and 5, respectively, i.e., surfaces which are stressed during arrestings, in the range of which the wall thickness is about 1 mm.
  • Conical side walls 6 or 7 which are reduced in their'wall thickness to an average of about 0.3 mm extend from these surface ranges 4 or 5 to the outside to the transition or connection areas of the electrodes 2 and 3 and the insulating member 1.
  • the electrodes of the button arrester which, according to the invention, are essentially reinforced in their active surface ranges, guarantee that the space of the button arrester which is available for the active electrode ranges represents an essentially increased metallic heat capacity which accomodates heat produced during discharges in the button arrester, and, since the thin walls hinder strongly a heat conductivity, dissipates this heat almost exclusively via the contact members 8, 9.
  • the invention is not limited to the sample embodiments shown.
  • the conical side walls can also be produced in another way, besides shallow drawing.
  • a symmetrical overvoltage arrester comprising a gas-tight housing including a tubular insulating member, a pair of identical one-piece cup-shaped electrodes sealed to respective ends of said tubular insulating member, each of said electrodes including a side wall and an end wall integral therewith, each of said end walls disposed spaced from and including a surface facing the like surface of the other within said tubular insulating member, and a pair of electrical leads connected to respective other surfaces of respective end walls and extending outside of said tubular insulating member, said end walls each having a thickness of at least a multiple greater than the thickness of the respective side walls to hinder heat transfer to said tubular insulating member so that heat is dissipated through said leads.
  • each said side wall is about 0.3 mm and the thickness of each said end wall is in the range between i and 2 mm.

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  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)
US076501A 1969-10-09 1970-09-29 Button overvoltage arrester with cup-shaped electrodes with different side and end wall thicknesses Expired - Lifetime US3876894A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1951015A DE1951015C3 (de) 1969-10-09 1969-10-09 Verfahren zum Herstellen eines Überspannungsknopf ableiten

Publications (1)

Publication Number Publication Date
US3876894A true US3876894A (en) 1975-04-08

Family

ID=5747777

Family Applications (1)

Application Number Title Priority Date Filing Date
US076501A Expired - Lifetime US3876894A (en) 1969-10-09 1970-09-29 Button overvoltage arrester with cup-shaped electrodes with different side and end wall thicknesses

Country Status (7)

Country Link
US (1) US3876894A (de)
JP (1) JPS496622B1 (de)
AT (1) AT303872B (de)
CH (1) CH517392A (de)
DE (1) DE1951015C3 (de)
FR (1) FR2065201A5 (de)
GB (1) GB1255286A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995183A (en) * 1974-04-16 1976-11-30 Siemens Aktiengesellschaft Spark gap component for use in ignition systems of internal combustion engines
US4084208A (en) * 1975-03-28 1978-04-11 General Instrument Corporation Gas-filled surge arrestors
US4266260A (en) * 1978-06-29 1981-05-05 Siemens Aktiengesellschaft Surge arrester
US4362962A (en) * 1980-02-19 1982-12-07 Siemens Aktiengesellschaft Electrical terminal connection for the electrodes of a gas discharge over-voltage arrester
US4658324A (en) * 1983-03-23 1987-04-14 Okaya Electric Industries Co., Ltd. Surge absorbing device
US4831485A (en) * 1986-04-22 1989-05-16 Siemens Aktiengesellschaft Gas discharge overvoltage arrester
US5370100A (en) * 1992-10-09 1994-12-06 Robert Bosch Gmbh Connecting part for ignition device
US5491381A (en) * 1991-12-18 1996-02-13 Yazaki Corporation Discharge tube
US20020075125A1 (en) * 1999-03-16 2002-06-20 Yang Bing Lin Surge absorber without chips

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2152998A (en) * 1938-10-24 1939-04-04 Gen Electric Vapor Lamp Co Circuit for gaseous electric discharge devices
US2365518A (en) * 1941-09-17 1944-12-19 Westinghouse Electric & Mfg Co Electric discharge device
US2365517A (en) * 1941-11-13 1944-12-19 Westinghouse Electric & Mfg Co Electric discharge device
US2478119A (en) * 1945-04-20 1949-08-02 Gen Motors Corp Gaseous discharge tube
US3263112A (en) * 1963-07-08 1966-07-26 Alan C Kolb Magnetic blowout switch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS433809Y1 (de) * 1966-08-11 1968-02-17

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2152998A (en) * 1938-10-24 1939-04-04 Gen Electric Vapor Lamp Co Circuit for gaseous electric discharge devices
US2365518A (en) * 1941-09-17 1944-12-19 Westinghouse Electric & Mfg Co Electric discharge device
US2365517A (en) * 1941-11-13 1944-12-19 Westinghouse Electric & Mfg Co Electric discharge device
US2478119A (en) * 1945-04-20 1949-08-02 Gen Motors Corp Gaseous discharge tube
US3263112A (en) * 1963-07-08 1966-07-26 Alan C Kolb Magnetic blowout switch

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995183A (en) * 1974-04-16 1976-11-30 Siemens Aktiengesellschaft Spark gap component for use in ignition systems of internal combustion engines
US4084208A (en) * 1975-03-28 1978-04-11 General Instrument Corporation Gas-filled surge arrestors
US4266260A (en) * 1978-06-29 1981-05-05 Siemens Aktiengesellschaft Surge arrester
US4362962A (en) * 1980-02-19 1982-12-07 Siemens Aktiengesellschaft Electrical terminal connection for the electrodes of a gas discharge over-voltage arrester
US4658324A (en) * 1983-03-23 1987-04-14 Okaya Electric Industries Co., Ltd. Surge absorbing device
US4831485A (en) * 1986-04-22 1989-05-16 Siemens Aktiengesellschaft Gas discharge overvoltage arrester
US5491381A (en) * 1991-12-18 1996-02-13 Yazaki Corporation Discharge tube
US5370100A (en) * 1992-10-09 1994-12-06 Robert Bosch Gmbh Connecting part for ignition device
US20020075125A1 (en) * 1999-03-16 2002-06-20 Yang Bing Lin Surge absorber without chips

Also Published As

Publication number Publication date
DE1951015B2 (de) 1978-06-08
JPS496622B1 (de) 1974-02-15
CH517392A (de) 1971-12-31
AT303872B (de) 1972-12-11
DE1951015A1 (de) 1971-04-22
DE1951015C3 (de) 1979-02-15
FR2065201A5 (de) 1971-07-23
GB1255286A (en) 1971-12-01

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