US1890327A - Explosion chamber for liquid break switches - Google Patents

Explosion chamber for liquid break switches Download PDF

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Publication number
US1890327A
US1890327A US358089A US35808929A US1890327A US 1890327 A US1890327 A US 1890327A US 358089 A US358089 A US 358089A US 35808929 A US35808929 A US 35808929A US 1890327 A US1890327 A US 1890327A
Authority
US
United States
Prior art keywords
explosion chamber
chamber member
explosion
switches
break switches
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
US358089A
Other languages
English (en)
Inventor
Herman J H Huber
Charles R Kellogg
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
Priority to BE369731D priority Critical patent/BE369731A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US358089A priority patent/US1890327A/en
Priority to FR694146D priority patent/FR694146A/fr
Priority to GB12806/30A priority patent/GB343824A/en
Application granted granted Critical
Publication of US1890327A publication Critical patent/US1890327A/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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H01H33/75—Liquid-break switches, e.g. oil-break

Definitions

  • Our invention relates to electric switches ofthe type adapted to interrupt modern com- ⁇ mercial power circuits. More particularly ⁇ and the initial separation thereof takes place within an explosion chamber.
  • the explosion chamber members of such switches must be capable of withstanding y great internal pressure due to the sudden gas ormation therein when the switch is called upon to, interrupt a heavy load or short circuitit has been customary heretofore to construct the explosion chamber member of a metal having the requisite strength, such for -example as steel or bronze.
  • the metal chamber member at its point of support has beenin electrical connection with the fixed contact therein, the chamber member has been provided with a covering of insulation on both the inside and the outside to prevent the arc from whipping to the chamber walls.
  • Fig. 1 is an elevational view partly in section, of a switch embodying our invention
  • Fig. 2 is a detail drawn to a larger scale of the explosion chamber member
  • Fig. 3 is a similar view drawn at a slightly smaller scale showing a modified form.
  • the switch which we have illustrated by way of example in Fig. 1 as embodying our invention has an enclosing casing comprising the steel tank 1 containing the insulating liquid, such as oil, in which the contacts are immersed and the cover 2 securely bolted to the tank and supporting the contacts, mechanism, etc.
  • the cover 2 Through the cover 2 extend the 4insulator bushings 3, shown as of the pil filled type such as are usually employed on switches for the higher voltages.
  • the adapt-er 4 Secured to the lower end of each insulator bushin is the adapt-er 4. by means of. which suita le adjustments may be made to compensate for variations in the bushings.
  • the adapter Removably attached to the adapter is the fixed socket contact -5 and secured'to the flange 8 ci the adapter is the explosion chamber member or pot 7 hereinafter to be described. Between the two insulator bushings is the housing 8 containing parts oi the operating mechanism including the connection to the contact operating rod 9. The lower end of this rod is secured to the cross head l0 which supports and connects the two Contact rods ll.
  • the explosion chamber member 7 has a tapering sidewall portion 12 which flares outwardly at its upper end to form the attaching ange portion 13 and which curves inwardly at its lower end to form the end portion 14 of the member.
  • the explosion chamber member 7 we construct of built-up material composed'of la ers or laminations of paper or other suitab e insulating material impregnated with a resinous condensation product and cured while subjectedto the proper heat and pressure. We have found the well known phenol-formaldehyde type of resin to be a satisfactory condensation product for this purpose.
  • the laminations extend continuously both circumferentially and longitudinally of the chamber member.
  • This ring is curved to conform to the fillet between the side wall and the flange of the explosion chamber member and serves both to distribute the pressure gf the bolt heads and to strengthen the mem-
  • Charles F. Peterson (Serial No. 358,072) filed concurrently herewith and assigned to the sameutzignee as the present application, there is disclosed and claimed a method and an apparatus with which explosion chamber members of the kind described above have been successfully made.
  • the explosion chamber member 20 is a so o laminated insulating material, being similar in construction to the previouslyv described form.
  • the securing flange in this form of our invention is in the form of an outwardly flaring conical extension 21 which is engaged by the securing ring 22 having a bevel inner face. Accordingly the metallic ring and not matethe conical extension 21 of insulatm rial is placed under tension due to hig pres-'- sures generated within the explosion member 20.
  • an all-insulation explosion chamber pot surrounding one of said contacts and having a throat opening through which a coacting contact is withdrawn when said contacts are separated, said explosion chamber pot being a one-piece structure composed of built-up laminations of insulatin material extending longitudinally of an continuously throughout the wall structure of said pot so as to withstand high bursting preures.
  • an explosion chamber pot immerse inlsaid liquid' and surroundin one of said contacts comprising a periphera securing iiangel ortion, a side wall portion and an end lWa l ⁇ portion having athroat opening through which a coacting contact is guided, said portions being continuous and forming a unitary 4structure composed of built-up laminations of insulating material arranged so that the laminations of one portion extend into theadjacent portion or portions.
  • an explosion chamber pot having aunitary andcontinuous wall structure comprising a tapering side wall ortion lterminating in an outwardly exten ing securing flanveportion and in an end portion khaving a ared guide opening, said Wall structure composed of built-up laminations of fibrous material impregnated with a resinous condensation product arranged so as to extend longitudinally of said side wall portion and into said flange and end portions.

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  • Moulds For Moulding Plastics Or The Like (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US358089A 1929-04-25 1929-04-25 Explosion chamber for liquid break switches Expired - Lifetime US1890327A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE369731D BE369731A (enrdf_load_stackoverflow) 1929-04-25
US358089A US1890327A (en) 1929-04-25 1929-04-25 Explosion chamber for liquid break switches
FR694146D FR694146A (fr) 1929-04-25 1930-04-18 Perfectionnements aux chambres d'explosion pour interrupteurs et disjoncteurs électriques, ainsi qu'aux procédés et au matériel pour leur fabrication
GB12806/30A GB343824A (en) 1929-04-25 1930-04-25 Improvements relating to explosion chambers for oil switches and the manufacture of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US358089A US1890327A (en) 1929-04-25 1929-04-25 Explosion chamber for liquid break switches

Publications (1)

Publication Number Publication Date
US1890327A true US1890327A (en) 1932-12-06

Family

ID=23408262

Family Applications (1)

Application Number Title Priority Date Filing Date
US358089A Expired - Lifetime US1890327A (en) 1929-04-25 1929-04-25 Explosion chamber for liquid break switches

Country Status (4)

Country Link
US (1) US1890327A (enrdf_load_stackoverflow)
BE (1) BE369731A (enrdf_load_stackoverflow)
FR (1) FR694146A (enrdf_load_stackoverflow)
GB (1) GB343824A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL88402C (enrdf_load_stackoverflow) * 1952-11-07
DE1042887B (de) * 1952-12-13 1958-11-06 Auto Union Gmbh Mehrteilige, beheizte Pressform fuer Kunststoffe

Also Published As

Publication number Publication date
FR694146A (fr) 1930-11-28
BE369731A (enrdf_load_stackoverflow)
GB343824A (en) 1931-02-26

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