US2039838A - Compressed air circuit breaker with movable piston - Google Patents

Compressed air circuit breaker with movable piston Download PDF

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Publication number
US2039838A
US2039838A US8090A US809035A US2039838A US 2039838 A US2039838 A US 2039838A US 8090 A US8090 A US 8090A US 809035 A US809035 A US 809035A US 2039838 A US2039838 A US 2039838A
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US
United States
Prior art keywords
piston
rod
cylinder
compressed air
contact
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
US8090A
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English (en)
Inventor
Saudicoeur Louis Joseph
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Individual
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Individual
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Publication date
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Publication of US2039838A publication Critical patent/US2039838A/en
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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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas

Definitions

  • Electric circuit-breakers are known in which the arc is blown out by compressed air produced during the opening operation of the circuitbreaker by means of a piston pump actuated at 5 the same time as the movable contact.
  • the piston and the movable contact are fixed on the same rod in such manner that the compression of air inside the cylinder of the pump by the piston last as long id as the separation of the contacts.
  • Fig. 1 is a vertical cross-sectional view oi. a circuit-breaker shown inclosed position and embodying one illustrative form of the invention.
  • Fig. 2 is a partial cross-sectional view of the same embodiment shown in operating position.
  • the circuit-breaker comprises fixed contact I with its corresponding sparking contact I moulded on a supporting insulator. It is further provided with hollow movable contact 2 in the axis of which is fixed its sparking contact 2. Between members 2 and 2' there is provided a convergent nozzle 3 made from insulating material. Members 2, 2' and 3 are fixed at the free extremity of hollow :rod 4 disposed in the interior The air compressed by the piston may be diof cylinder 5. Piston 6 mounted loosely on rod 4 forms with said cylinder 5 a pump projecting a blast of air against the are drawn out at break and resulting from the separation of sparking contacts l and 2.
  • said rod 4 At its extremity opposed to the contacts, said rod 4 is extended beyond piston 6 and carries at said extremity a connecting rod 8 mechanically operated through insulator 9 pivotally mounted on axis l0. Between said connecting rod 8 and said piston 6, rod 4 is provided with a series of apertures i I disposed near said piston at the side 01' flange l8. Beyond said apertures plug 2! obturates hollow rod 4. In the left hand end of cylinder 5 is disposed the abutting member or cylindrical sleeve II the internal diameter of which is greater than the external diameter of flange l8 and smaller than the external diameter 01 piston 6.
  • the two terminals of the circuit-breaker shown at It and I4 lead the electric current to the apparatus, said current flowing from terminal l3 into hollow rod 4 and hence through contacts 2 and l to terminal M;
  • the operation of the circuit-breaker is as follows: By the operation through shaft l oi. the switch connecting rod unlocking insulator 9, spring l5, by displacing piston 6 towards the left, first separates contacts I and 2 and subsequently sparkingcontacts I and 2' momentarily held in contact by the second spring 19. On separation of said sparking contacts an arc is drawn out around which is projected the air contained in cylinder 5, said air being compressed by the rapid displacement of piston 6 which under the infiuence of spring l follows fiange I8. This air reaches the arc by flowing through apertures H in hollow rod 4 and then through the open passages-provided between sparking contact 2 and contact '2. Said air is conveniently guided around said are by converging nozzle 3 made from insulating material, and as this said nozzle also prevents the striking back of the are on to contact 2, said arc is rapidly extinguished.
  • a pump to produce on separation of said contacts compressed air for the extinction oi the are, said pump comprising a cylinder, in the interior of said cylinder a piston, a rod, a projecting member fixed on said rod and a spring, said piston being mounted loosely on said rod and said spring being disposed so as to maintain said piston applied against said projectin'g member, said rod being extended outside said cylinder where it is provided with said movable contact, and an abutting member flxed in the interior of said cylinder, said abutting member being disposed so as to arrest the displacement of said piston before the termination of the displacement of said rod carrying said movable contact;
  • a pump to produce on separation of said contact compressed air for the extinction of the arc
  • said pump comprising a cylinder, in the interior of said cylinder a piston, a rod, a flange flxed on said rod and a spring, said piston being mounted loosely on said rod and said spring being disposed so as to maintain said piston applied against said flange, said rod being extended outside said cylinder where it is provided with said movable contact, and an abutting member fixed in the interior of said cylinder, said abutting member being constituted by a cylindrical sleeve, the internal diameter of said sleeve being smaller than the external diameter of said piston and being greater than the external diameter of said flange.

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  • Circuit Breakers (AREA)
  • Actuator (AREA)
US8090A 1934-03-09 1935-02-25 Compressed air circuit breaker with movable piston Expired - Lifetime US2039838A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR770388T 1934-03-09

Publications (1)

Publication Number Publication Date
US2039838A true US2039838A (en) 1936-05-05

Family

ID=9683232

Family Applications (1)

Application Number Title Priority Date Filing Date
US8090A Expired - Lifetime US2039838A (en) 1934-03-09 1935-02-25 Compressed air circuit breaker with movable piston

Country Status (4)

Country Link
US (1) US2039838A (enrdf_load_stackoverflow)
BE (1) BE403914A (enrdf_load_stackoverflow)
DE (2) DE619806C (enrdf_load_stackoverflow)
FR (1) FR770388A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430008A (en) * 1941-06-18 1947-11-04 Fernier Bernard Marie Hil Paul Electric circuit breaker
US2551772A (en) * 1946-05-21 1951-05-08 Forges Ateliers Const Electr High-tension interrupting device
US2916568A (en) * 1957-10-21 1959-12-08 Ite Circuit Breaker Ltd Contact air cooling system
US3189720A (en) * 1962-03-02 1965-06-15 Wintriss George Electric control switch with self locking contact

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764501C (de) * 1938-09-21 1953-04-27 Delle Atel Const Electr Elektrischer Schalter mit Lichtbogenloeschung durch ein stroemendes Loeschmittel
DE957410C (de) * 1952-12-03 1957-01-31 Elektro App Bau Brechtel & Har Einpoliger Lastschalter
CH315441A (de) * 1953-08-01 1956-08-15 Bbc Brown Boveri & Cie Kompressionsvorrichtung zur Erzeugung des Druckes des Gases für die Lichtbogenlöschung an einem Schalter
FR1144285A (fr) * 1954-12-24 1957-10-11 Westinghouse Electric Corp Interrupteurs de circuit
CH334100A (de) * 1955-09-03 1958-11-15 Bbc Brown Boveri & Cie Leistungstrennschalter
DE1132622B (de) * 1956-03-09 1962-07-05 Frobert Michaelis Dipl Ing Druckluftschalter, vorzugsweise Leistungs- oder Lasttrenn-schalter
US3095490A (en) * 1960-02-26 1963-06-25 Westinghouse Electric Corp Circuit interrupters
DE1255763B (de) * 1961-03-22 1967-12-07 Licentia Gmbh Schaltgeraet mit Druckluftbeblasung der Kontaktstuecke
AT235384B (de) * 1961-08-25 1964-08-25 Sprecher & Schuh Ag Druckgasschalter mit stromabhängiger Löschmittelströmung
DE1206056B (de) * 1963-09-12 1965-12-02 Siemens Ag Elektrischer Schalter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430008A (en) * 1941-06-18 1947-11-04 Fernier Bernard Marie Hil Paul Electric circuit breaker
US2551772A (en) * 1946-05-21 1951-05-08 Forges Ateliers Const Electr High-tension interrupting device
US2916568A (en) * 1957-10-21 1959-12-08 Ite Circuit Breaker Ltd Contact air cooling system
US3189720A (en) * 1962-03-02 1965-06-15 Wintriss George Electric control switch with self locking contact

Also Published As

Publication number Publication date
DE647042C (de) 1937-06-26
DE619806C (de) 1935-10-10
FR770388A (fr) 1934-09-12
BE403914A (enrdf_load_stackoverflow) 1934-07-31

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