US3222484A - Expansible vacuum envelope for electrical devices - Google Patents

Expansible vacuum envelope for electrical devices Download PDF

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Publication number
US3222484A
US3222484A US114098A US11409861A US3222484A US 3222484 A US3222484 A US 3222484A US 114098 A US114098 A US 114098A US 11409861 A US11409861 A US 11409861A US 3222484 A US3222484 A US 3222484A
Authority
US
United States
Prior art keywords
expansible
envelope
sections
endwalls
vacuum
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
US114098A
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English (en)
Inventor
Jennings Jo Emmett
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.)
Jennings Radio Manufacturing Corp
Original Assignee
Jennings Radio Manufacturing Corp
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 Jennings Radio Manufacturing Corp filed Critical Jennings Radio Manufacturing Corp
Priority to US114098A priority Critical patent/US3222484A/en
Priority to BE664794A priority patent/BE664794A/xx
Priority to NL6507120A priority patent/NL6507120A/xx
Priority to GB24751/65A priority patent/GB1097144A/en
Priority to DEST18812U priority patent/DE1956363U/de
Priority to CH870665A priority patent/CH449742A/de
Priority to FR34238A priority patent/FR1452966A/fr
Application granted granted Critical
Publication of US3222484A publication Critical patent/US3222484A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/018—Dielectrics
    • H01G4/02—Gas or vapour dielectrics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66238—Specific bellows details

Definitions

  • Another object of the invention is to provide lightweight single pole vacuum-switches, several of which may be actuated by one armature to provide a multiple pole switch.
  • Still another object of the invention is to provide a vacuum switch of simple construction resulting in reduced frictional losses and-increased switch life.
  • a still further object of the invention is the provision of an expansible envelope constructionfor vacuum devices such as switches and capacitors incorporating relatively movable electrodes so that expanson and contraction of the envelope effects relative movement of the electrodes.
  • FIG. 1 is a side elevational view of a preferred form of the invention embodying a vacuum switch the envelope being partly broken away to show internal structure;
  • FIG. 2 is a fragmentary cross sectional view of the sidewall of a modified form of the envelope of FIG. 1;
  • FIG. 3 is a fragmentary cross sectional view of the sidewall of still another modified form of the envelope of FIG. 1.
  • the vacuum switch embodying this invention includes a fixed contact and a mobile contact 11 (FIG. 1), and terminals 12, 13 respectivelyconnected for conducting electricity to said contacts.
  • the evacuated envelope of this invention differs from the evacuated envelopes of earlier types of vacuum devices including vacuum switches in that it is expansible rather than rigid.
  • Envelope 14 expands to allow contact 11 to be moved from a position engaging contact 10 to a position separated from said contact, that is, from the closed position of the switch to its open position.
  • At least one section or portion of envelope 14 is formed from nonconducting material to insulate terminals 12, 13 from each other when contacts 10, 11 are not engaged.
  • an evacuated envelope is formed by a pair of opposed ends 16, 17 connected together by cylindrical sidewalls 14.
  • the end 17 of envelope 14 is preferably of metal and is provided with the contact 11 which may conveniently be considered to be the mobile contact.
  • Said mobile contact 11 may be brazed or otherwise fixedly secured to the inner side of end 17, and terminal 13,
  • a threaded stud may be brazed to the outer side of end 17.
  • the opposite end 16 of the envelope is provided with a central apertured boss 23 through which is received a shaft 25 hermetically sealed to end 16' at boss 23.
  • Said shaft 25- may be threaded at its outer end as at 12 to form a terminal.
  • the inner endof shaft 25' carries the fixed contact 10 which is preferably positioned so that atmospheric pressure acting on the ends 16, 17 causes the contacts 10, 11 to close as seen in FIG. 1.
  • Sidewalls 14 are made expansible in a manner to be described so that ends 16, 17' may be urgedapart to open contacts 10 and 11 against the closing pressure of the atmosphere.
  • the expansible sidewalls 14' are formed by aplurality of similar cylindrical sections of ceramic material, said sections being indicated at 18.
  • the annular surfaces of theouter sections 18 that connect with ends 16, 17 are metallized so thatsaid sections may be hermetically sealed as by brazing to said ends.
  • the other an nular surfaces of said outer sections are metallized to permitthe same to be: hermetically brazed to expansible elements or bellows that are interposed between each adjacent pair of ceramic sections.
  • FIG; 1 four such expansible elements are shown designated 20 and eachcomprising a pair of opposed annular flanges 21 connected together by an annular juncture 22.
  • the expansible elements or bellows elements 20 may be formed from relatively thin copper sheet by spinning or maybe more conveniently formed by brazing the two opposed flanges together along their common juncture. It will be apparent that the juncture 22 provides a hinge permitting the flanges 21 to move relatively thereby permitting ends 16, 17 to move toward and away from each other to engage and disengage the contacts 10. 11.
  • the more bellows elements that are used the greater will be the yieldability of the switch and the less will be the strains applied to said bellows elements.
  • the juncture 22 that connects the opposed flanges 21 is formed to provide a relatively large radius thereby tending to reduce localized stresses.
  • the bellows elements may be formed as indicated in FIG. 2 wherein the juncture 32 is formed to a radius no greater than half the nominal distance between the opposed flanges 31. If the amount of deflection to which each bellows element is subjected is not very much greater, the somewhat simpler construction of FIG. 2 may be resorted to.
  • additional folds may be formed in the metal sheet from which the bellows element is made.
  • FIG. 3 there is provided an additional fold of material so that in addition to the pair of opposed flanges 35 that are secured to the adjacent surfaces of the ceramic sections 18 a central fold is formed to provide an additional pair of flanges 36 connected together by juncture 38 and connected to the two secured flanges 35 by junctures 37, 39.
  • An hermetically tight hollow envelope comprising a composite sidewall including a plurality of axially spaced tubular ceramic sections and an expansible tubular metallic member interposed between each two adjacent tubular ceramic sections, a metallic bond hermetically interposed between the coaxially aligned ceramic sections and each associated expansible metallic member, and rigid endwalls closing opposite ends of the composite sidewall.
  • each of said expansible tubular metallic members is comprised of relatively thin metal folded upon itself to provide a pair of opposed flanges, the outer peripheral edge portions of said flanges being bonded to said tubular ceramic sections.
  • a vacuum switch comprising: an expansible evacuated envelope, said envelope being formed by a composite sidewall including a plurality of spaced axially aligned electrically insulating tubular sections and an expansible tubular section interposed between, coaxial with, and hermetically bonded to each two adjacent insulating tubular sections to permit relative axial movement between said insulating tubular sections, and rigid endwalls closing opposite ends of the composite sidewall, each endwall carrying an electric contact whereby relative movement of said endwalls engages and disengages said contacts.
  • each said expansible tubular section extends radially inwardly from said insulating tubular sections, the outer peripheral edges of said flanges being bonded to said insulating tubular sections.
  • each endwall further includes terminal means electrically connected to its respective electric contact.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Ceramic Capacitors (AREA)
US114098A 1961-06-01 1961-06-01 Expansible vacuum envelope for electrical devices Expired - Lifetime US3222484A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US114098A US3222484A (en) 1961-06-01 1961-06-01 Expansible vacuum envelope for electrical devices
BE664794A BE664794A (US07816562-20101019-C00012.png) 1961-06-01 1965-06-02
NL6507120A NL6507120A (US07816562-20101019-C00012.png) 1961-06-01 1965-06-04
GB24751/65A GB1097144A (en) 1961-06-01 1965-06-11 Hermetically sealed envelopes
DEST18812U DE1956363U (de) 1961-06-01 1965-06-14 Ausdehnbares vakuumgefaess fuer elektrische geraete.
CH870665A CH449742A (de) 1961-06-01 1965-06-22 Hermetisch dichtes Gehäuse und seine Verwendung für Vakuumschalter
FR34238A FR1452966A (fr) 1961-06-01 1965-10-08 Enveloppe expansible sous vide pour appareillage électrique

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US114098A US3222484A (en) 1961-06-01 1961-06-01 Expansible vacuum envelope for electrical devices
NL6507120A NL6507120A (US07816562-20101019-C00012.png) 1961-06-01 1965-06-04
GB24751/65A GB1097144A (en) 1961-06-01 1965-06-11 Hermetically sealed envelopes
DEST18812U DE1956363U (de) 1961-06-01 1965-06-14 Ausdehnbares vakuumgefaess fuer elektrische geraete.
CH870665A CH449742A (de) 1961-06-01 1965-06-22 Hermetisch dichtes Gehäuse und seine Verwendung für Vakuumschalter
FR34238A FR1452966A (fr) 1961-06-01 1965-10-08 Enveloppe expansible sous vide pour appareillage électrique

Publications (1)

Publication Number Publication Date
US3222484A true US3222484A (en) 1965-12-07

Family

ID=27543820

Family Applications (1)

Application Number Title Priority Date Filing Date
US114098A Expired - Lifetime US3222484A (en) 1961-06-01 1961-06-01 Expansible vacuum envelope for electrical devices

Country Status (7)

Country Link
US (1) US3222484A (US07816562-20101019-C00012.png)
BE (1) BE664794A (US07816562-20101019-C00012.png)
CH (1) CH449742A (US07816562-20101019-C00012.png)
DE (1) DE1956363U (US07816562-20101019-C00012.png)
FR (1) FR1452966A (US07816562-20101019-C00012.png)
GB (1) GB1097144A (US07816562-20101019-C00012.png)
NL (1) NL6507120A (US07816562-20101019-C00012.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009031598A1 (de) * 2009-07-06 2011-01-13 Siemens Aktiengesellschaft Vakuumschaltröhre

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48255U (US07816562-20101019-C00012.png) * 1971-05-26 1973-01-05
DE3129020A1 (de) * 1981-07-22 1983-02-10 Siemens AG, 1000 Berlin und 8000 München "vakuumschalter"

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR638489A (fr) * 1926-08-26 1928-05-25 Scherbius & Ritter Interrupteur électrique
US1836654A (en) * 1926-09-13 1931-12-15 Bosch Robert Electrical make and break apparatus
US1905751A (en) * 1929-12-26 1933-04-25 Gen Electric Vacuum sealing structure
DE663422C (de) * 1935-10-24 1938-08-05 Stotz Kontakt Gmbh Installationsschalter mit Dreh- oder Druckknopfbedienung
US2326074A (en) * 1939-09-20 1943-08-03 Westinghouse Electric & Mfg Co Circuit interrupter
CH245185A (de) * 1941-10-07 1946-10-31 Hermes Patentverwertungs Gmbh Einrichtung zur Beeinflussung des Stromflusses in einem elektrischen Stromkreis.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR638489A (fr) * 1926-08-26 1928-05-25 Scherbius & Ritter Interrupteur électrique
US1836654A (en) * 1926-09-13 1931-12-15 Bosch Robert Electrical make and break apparatus
US1905751A (en) * 1929-12-26 1933-04-25 Gen Electric Vacuum sealing structure
DE663422C (de) * 1935-10-24 1938-08-05 Stotz Kontakt Gmbh Installationsschalter mit Dreh- oder Druckknopfbedienung
US2326074A (en) * 1939-09-20 1943-08-03 Westinghouse Electric & Mfg Co Circuit interrupter
CH245185A (de) * 1941-10-07 1946-10-31 Hermes Patentverwertungs Gmbh Einrichtung zur Beeinflussung des Stromflusses in einem elektrischen Stromkreis.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009031598A1 (de) * 2009-07-06 2011-01-13 Siemens Aktiengesellschaft Vakuumschaltröhre
DE102009031598B4 (de) * 2009-07-06 2011-06-01 Siemens Aktiengesellschaft Vakuumschaltröhre
US8847097B2 (en) 2009-07-06 2014-09-30 Siemens Aktiengesellschaft Vacuum interrupter

Also Published As

Publication number Publication date
GB1097144A (en) 1967-12-29
DE1956363U (de) 1967-03-02
CH449742A (de) 1968-01-15
BE664794A (US07816562-20101019-C00012.png) 1965-12-02
NL6507120A (US07816562-20101019-C00012.png) 1966-12-05
FR1452966A (fr) 1966-04-15

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