US2157832A - Electric circuit interrupter - Google Patents

Electric circuit interrupter Download PDF

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Publication number
US2157832A
US2157832A US173948A US17394837A US2157832A US 2157832 A US2157832 A US 2157832A US 173948 A US173948 A US 173948A US 17394837 A US17394837 A US 17394837A US 2157832 A US2157832 A US 2157832A
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US
United States
Prior art keywords
arc
gas
heat
core
covering
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
US173948A
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English (en)
Inventor
Nowak Paul
Tobis Carlos
Hofmeier Hermann
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
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Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US2157832A publication Critical patent/US2157832A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor

Definitions

  • Such bolts or pins are likewise manufactured preferably of a suitable gas-delivering material. Furthermore,v it is known to provide the switching chamber with a supporting body consisting of hard paper or a similar material provided, in turn, with ya shell of a suitable gas-delivering material, the purpose of that contrivance being to obtain a greater blow-bending strength and to save a certain quantity of the gas-delivering material. Also hard linen has been proposed as material for said supporting body.
  • a preformed layer as for4 y l example afilm or a tubular member, is made of the gas-delivering material and, if it is a film, is f wound upon or, 'if' it is a'tube, is shoved upon the taneousapplication of heat.
  • the nished member may be rendered still more stable, as regards resistance to actions of heat, by subjecting it a second time to a heat-treatment.
  • the shell can be manufactured Without the employment of a solvent or of a swelling substance by making it of polymerized acrylic acid derivates, such, for instance, as polymerized acrylic acid esters with additions of polymerized, nitrogencontaining acrylic compound as, for example, polymerized acrylic acid nitrile or polymerized acrylic acid amide, and of a suitable ller as, for instance, good heat-conducting crystalline materials, such as nely granulated quartz, alsopulverulent quartz, aluminium oxide and the like. With the aid of the respective iiller distributed in the artificial mass a local superheating of the shellis prevented.
  • polymerized acrylic acid derivates such, for instance, as polymerized acrylic acid esters with additions of polymerized, nitrogencontaining acrylic compound as, for example, polymerized acrylic acid nitrile or polymerized acrylic acid amide
  • a suitable ller as, for instance, good heat-conducting crystalline materials, such as nely granulated quartz, alsopulverulent quartz, aluminium oxide
  • thermoplastic substances able to deliver a large quantity of gas and to exert a flame-extinguishing effect can be incorporated into the mass, as, for instance., oxamide, also methylene-urea or socalled carbamide resins (also known as aminoplasts), and the like.
  • Another possibility is to extrude the' artificial mixtureffrom a nozzle in tubular form directly upon the core which is arranged just in front of the outlet opening of that nozzle.
  • the mixture and thecore are then again united with one another i n the described manner.
  • Still another possibility is to manufacture by means of an extrusion-press corresponding tubes which then are shoved upon the supporting body and are firmly pressed upon it with the simul- 'Ihe tubes made on that press are so dimensioned that there is as little play as possible between their inner surface and the outer surface of the supporting body.
  • the filling pin to be produced is to 4have square ytransverse section, vthenthe sup- It is a matter of course that means may be provided for preventing longitudinal displacement of the tube upon the core.
  • the tube may, for this purpose, be provided with circumferential grooves which are lled up with the covering material, that is preferably supplied in a certain excess, but if the tubes are somewhat large in transverse section it is suited to the purpose in view to place a thread-like piece of the covering material into each circumferential groove of the core prior to showing the tube upon it whereafter the tube and the core are firmly united with one another in the manner described.
  • grooves can, however, be dispensed with, especially when there is provided on the core a thin layer of the covering mixture which then serves to hold the covering firmly on the core.
  • thermoplastic mixture is not limited to the above-mentioned substances constituting the thermoplastic mixture, but also similar substances suitable for the purpose in View can be used, and a filler or a softening agent or a plurality or mixture of such materials may be added.
  • the invention is illustrated diagrammatically and by way of example on the accompanying drawing which shows a switching chamber part constituted by a lling pin designed and manufactured according to this invention, the pin being shown partly yin side-view and partly in longitudinal section, that is to say, the core is shown in side-view and the covering or shell in longitudinalsection.
  • a denotes the core or supporting body which consists, for instance, of hard paper or hard linen
  • b denotes the tubular covering or shell made, for instance, of a polymerized methacrylate.
  • the tube has been manufactured separately on an extrusion-press and has then been shifted onto the core; This latter is threaded at one end, as shown, and a cap c likewise consisting of hard paper or hard .linen has an internally threaded cavity With-which the cap is screwed upon the threaded end 'of thev core. Finally, the entire partv is subjected to pressure and heat, as repeatedly mentioned in the preceding part of this specification.
  • the winding procedure must generally be carried out manually and, as the components of the covering are generally hard or brittle, the bands must be very thin which entails the necessity to rep eat the winding until the requisite thickness of the covering has been attained.
  • the invention is particularly kuseful for the manufacture of filling pins for the chambersof switches operating with compressed gas yin which the walls of the switching space are subjectl to the action of theA arc and deliver thefquenchng gas.
  • 'I'hesubstances mentioned polymerized organic Icompounds having a vinyl grouping
  • a filling p in for :thev switch ⁇ tube of an electric switch said pin comprising ⁇ a core andI securely connected under heat and pressure toA said core a superposed, preformed layer of a composition comprising a polymerized organic compound having a vinyl grouping and adapted to yield an arc-interrupting gas under the heat of an arc.
  • an assembly comprising a base member and, securely united under heat and pressure to at least those portions of said member which are exposed to the heat of the arc, a preformed layer of a composition comprising a iler and a polymerized acrylic compound.

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  • Laminated Bodies (AREA)
US173948A 1936-11-10 1937-11-10 Electric circuit interrupter Expired - Lifetime US2157832A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202636X 1936-11-10
DE141136X 1936-11-14

Publications (1)

Publication Number Publication Date
US2157832A true US2157832A (en) 1939-05-09

Family

ID=25751990

Family Applications (1)

Application Number Title Priority Date Filing Date
US173948A Expired - Lifetime US2157832A (en) 1936-11-10 1937-11-10 Electric circuit interrupter

Country Status (3)

Country Link
US (1) US2157832A (en(2012))
BE (1) BE424496A (en(2012))
CH (1) CH202636A (en(2012))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516026A (en) * 1947-11-06 1950-07-18 Westinghouse Electric Corp Self-generated gas blast circuit interrupter embodying polyethylene
US2531007A (en) * 1947-03-20 1950-11-21 Westinghouse Electric Corp Circuit interrupter embodying polytetrafluoroethylene

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531007A (en) * 1947-03-20 1950-11-21 Westinghouse Electric Corp Circuit interrupter embodying polytetrafluoroethylene
US2516026A (en) * 1947-11-06 1950-07-18 Westinghouse Electric Corp Self-generated gas blast circuit interrupter embodying polyethylene

Also Published As

Publication number Publication date
CH202636A (de) 1939-01-31
BE424496A (en(2012))

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