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US1623787A - Electric switch - Google Patents

Electric switch Download PDF

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Publication number
US1623787A
US1623787A US601636A US60163622A US1623787A US 1623787 A US1623787 A US 1623787A US 601636 A US601636 A US 601636A US 60163622 A US60163622 A US 60163622A US 1623787 A US1623787 A US 1623787A
Authority
US
United States
Prior art keywords
switch
contacts
electric switch
magnetic field
loop
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
US601636A
Other languages
English (en)
Inventor
John D Hilliard
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Priority to US601636A priority Critical patent/US1623787A/en
Priority to GB1940/23A priority patent/GB205754A/en
Priority to FR573133D priority patent/FR573133A/fr
Application granted granted Critical
Publication of US1623787A publication Critical patent/US1623787A/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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Definitions

  • My invention relates to electric switches and especially to fluid break switches which have their conducting parts arranged to produce a magnetic field for blow ng out or extinguishing the are formed by the separation of the switch contacts under load.
  • the conducting circuit is arranged in the form of a loop, the stationary contacts and their connections to the switch terminals forming the sides and the straight bar interconnecting the movable contacts forming the bottom thereof. .
  • this loop Upon the flow of currentthrou h this loop, there is prduced a magnetic field which tends to blow out an are formed by the separation of the switch con tacts but which is ordinarily ineffective to produce this result because of its low intensity.
  • the intensity of this field maybeincreased by reducing the spacing between the switch terminals but there is encountered the diificulty that thIs spacing cannot be reduced below a certain minimum because of the danger of arcing between the switch terminals.
  • An object of my invention is to provide an arrangement of the switch circuit designed to greatly increase the rupturing capacity of the switch.
  • a further object of my invention isto provide improved means designed to intensify v the magnetic field of the switch for the purpose of quickly and effectively extinguishing an are formed by the separation of the switch contacts.
  • Fig. 1 shows, partly in section and partly in elevation, a switch in which my invention has been embodied, and in which Fig. 2 shows a slightly different arrangement of the switch circuit.
  • a switch tank 1 having an insulating lining 2 and a cover 3"in which is placed a valve 4 for permitting the escap: from the tank of any gases which may formed by volatilization of the insulating liquid 5 within which the switch contacts are immersed.
  • the insulating bushings 6 which are arranged to support the terminals 7 and the stationary contacts 8 extend through and are supported by the tank cover 3.
  • Clamping rings 9 are provided for rigidly securing the bushing 6 to the switch cover 3 and maintaining the stationary contacts 8 in operative relation with the movable contacts 10.
  • the movable contacts 10 are supported and interconnected by a U-shaped bar or bridging member 11 which enters the tank 1 through a stufling box 13 and which may be reciprocated to open and close theswitch by any suitable operating means.
  • the U-shaped member 11 is provided with insulation 14 for the purpose of localizing at the switch contacts any are which may be formed between them as a result of their separation when the switch is loaded.
  • the conductingcircuit of the switch is'arranged in the form of a double loop, the spacing between the loop sides in this case being much smaller than is permissible in the usual construction where the movable electrodes are interconnected by .a straight bridging member.
  • This reduction in the spacing between the loop sides mate rial strengthens the disrupting force exerted by the magnetic field of the switch upon an are between the switch terminals and thus operates to greatly increase the rupturing capacity of the switch.
  • Fig. 2 diflers from that shown in Fig. 1 in that the bridging member which interconnects the movable contacts is formed into a number of turns 15 for the purpose of intensifying the magnetic field at the switch contacts.
  • the turns of this bridging member are preferably wound in the form of a pancake coil which is provided with insulation for the pur ose of localizing the are at the contacts 0 the switch.
  • the turns 15 are spaced sidewise from each other merely to show the coil construction more clearly. I
  • a fluid switch com rising stationary and movable contacts, an a bridging member interconnectin said movable contacts, said bridging member being provided with fixed to the operating rod 12 l0 porting member being lation to localize at the switch contacts an are formed by the opening of the switch, and being comprised of a portion forming in effect a loop with said stationary Contact to intensify the magnetic field at the switch contacts whereby an are formed by the opening of the switch is disrupted.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
US601636A 1922-11-17 1922-11-17 Electric switch Expired - Lifetime US1623787A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US601636A US1623787A (en) 1922-11-17 1922-11-17 Electric switch
GB1940/23A GB205754A (en) 1922-11-17 1923-01-22 Improvements in and relating to electric switches
FR573133D FR573133A (fr) 1922-11-17 1923-11-14 Perfectionnements aux interrupteurs électriques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US601636A US1623787A (en) 1922-11-17 1922-11-17 Electric switch

Publications (1)

Publication Number Publication Date
US1623787A true US1623787A (en) 1927-04-05

Family

ID=9730700

Family Applications (1)

Application Number Title Priority Date Filing Date
US601636A Expired - Lifetime US1623787A (en) 1922-11-17 1922-11-17 Electric switch

Country Status (3)

Country Link
US (1) US1623787A (fr)
FR (1) FR573133A (fr)
GB (1) GB205754A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4320820A (en) * 1980-07-28 1982-03-23 Harvey Hubbell Incorporated Section insulator with improved arc control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4320820A (en) * 1980-07-28 1982-03-23 Harvey Hubbell Incorporated Section insulator with improved arc control

Also Published As

Publication number Publication date
GB205754A (en) 1923-10-25
FR573133A (fr) 1924-06-18

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