US2158920A - Circuit breaker having butt contacts - Google Patents

Circuit breaker having butt contacts Download PDF

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Publication number
US2158920A
US2158920A US101506A US10150636A US2158920A US 2158920 A US2158920 A US 2158920A US 101506 A US101506 A US 101506A US 10150636 A US10150636 A US 10150636A US 2158920 A US2158920 A US 2158920A
Authority
US
United States
Prior art keywords
contact
circuit breaker
butt
stem
moving
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
US101506A
Other languages
English (en)
Inventor
Whitehead George Ethelbert
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.)
WHITEHEAD SWITCHGEAR AND INV S
WHITEHEAD SWITCHGEAR AND INVENTIONS Ltd
Original Assignee
WHITEHEAD SWITCHGEAR AND INV S
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 WHITEHEAD SWITCHGEAR AND INV S filed Critical WHITEHEAD SWITCHGEAR AND INV S
Application granted granted Critical
Publication of US2158920A publication Critical patent/US2158920A/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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting

Definitions

  • This invention relates to electric switches and circuit breakers, and more particularly oil circuit breakers, and the invention specifically relates to switches and circuit breakers having butt 1 type contacts.
  • the moving butt contact is preferably rigidly carried on its support or bridge
  • the fixed butt contact is resiliently mounted on its w support.
  • Fig. i is a sectional elevation of the contacts of a circuit breaker
  • Fig. 2 is a sectional plan on the line IIII of Fig. 1;
  • Fig. 3 is a fragmentary horizontal section, on
  • the fixed butt contact 3 is resiliently mounted with respect to the circuit breaker stem 4 and in the arrangement illustrated this resilient mounting is ⁇ 11) achieved by providing the contact 3 with a rigid stem 5 which slides with good electrical contact within a resilient sleeve contact 6 which is pref erably a circularly laminated socket member in accordance with my Patent No. 2,032,241 granted February 25, 1936.
  • the sleeve or socket member 6 is disposed in a housing flange at the end of a metal tube I which is rigidly carried with good electrical connection at the lower end of the terminal stem 4. As shown in Fig.
  • the sleeve contact 6 comprises an annulus of closely packed thin flexible laminae 6, composed preferably of similarly bent strips of copper having their inner ends disposed in close relation and forming a resilient wall for engagement with the stem 5, a portion of the periphery of which is indicated by the dotted line 5*, to provide a good electrical contact therewith.
  • the outer ends of these laminae abut against the surrounding wall 6 of a recess formed in the lower end of the tube 1.
  • the laminae Ii may be separated by interposed similarly bent but relatively shorter laminae 6 of phosphor bronze or steel.
  • the spring 8 which urges the fixed butt contact 3 in the downward direction and the extent of downward movement of this contact is limited by means of diametrically opposite slots 9 formed in the wall of the tube I and having engaged therein the cross pin I0 passing through the stem 5 of the contact.
  • the fixed contact of the circuit breaker including the sleeve member 6 and the tube 8 are located in a shrouded tube II of insulating material which is carried in perforations in transverse barriers I2 and I3, which are fixed within the oil tank of the circuit breaker.
  • the housing for the sleeve member 6 is slightly smaller in diameter than the bore of the tube I I and is formed with one or more longitudinal grooves I4 through which the mixture of oil and are gases can escape.
  • a valve in the form of a flanged member I5 which therefore moves with the butt contact 3 during the opening and closing of the circuit breaker.
  • Said valve thus opens on the closing of the circuit breaker and vice versa, whereby the oil beneath the transverse barriers I2 and I3 is placed under pressure by reason of the generation of the arc gases, and such pressure will depend in part upon the diameter of the flanged member I5 which latter may be provided with a plurality of recesses l6 which are preferably staggered with respect to the recesses l4 aforesaid.
  • a heavy current high speed oil circuit breaker comprising a terminal stem, a butt type main moving contact having a short stem, 2. carrier on which the stem of said moving contact is mounted rigidly, said carrier being movable longitudinally to close and open the circuit breaker, a similar butt fixed contact having a stem, a resilient sleeve contact in which the stem of said fixed contact is slidable longitudinally, a metal housing secured to the terminal stem of'the circuit breaker and at the end of which said sleeve contact is carried rigidly, a spring in said housing urging said fixed butt contact towards the moving butt contact, an insulating shrouding tube housing said metal housing but with a restricted longitudinal oil passage therebetween, a partition sealed across the oil tank of the circuit breaker carrying said shrouding tube, and a valve member associated with said metal housing and linked with said fixed butt contact so that when the circuit breaker is closed said oil passage is open, and said oil passage becomes substantially closed when the circuit breaker is opened.
  • a heavy current high speed oil circuit breaker comprising a terminal stem, a butt type main moving contact having a short stern, a carrier on which the stem of said moving contact is mounted rigidly, said carrier being movable longitudinally to close and open the circuit breaker, a similar butt fixed contact having a stem, a resilient sleeve contact in which the stem of said fixed contact is sliolable longitudinally, a metal housing secured to the terminal stem of the circuit breaker and at the end of which said sleeve contact is carrier rigidly, a spring in said housing urging said fixed butt contact towards'the moving butt contact, an insulating shrouding tube housing said metal housing but with a restricted longitudinal oil passage therebetween, a partition sealed across the oil tank of the circuit breaker and carrying said shrouding tube, and a valve member associated with said metal housing and linked with said fixed butt contact so that when the circuit breaker is closed said oil passage is open, and said oil passage becomes substantially closed when the circuit breaker is opened, said metal housing and said

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Circuit Breakers (AREA)
US101506A 1935-10-23 1936-09-18 Circuit breaker having butt contacts Expired - Lifetime US2158920A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29304/35A GB464643A (en) 1935-10-23 1935-10-23 Improvements in electric switches and circuit breakers having butt contacts

Publications (1)

Publication Number Publication Date
US2158920A true US2158920A (en) 1939-05-16

Family

ID=10289415

Family Applications (1)

Application Number Title Priority Date Filing Date
US101506A Expired - Lifetime US2158920A (en) 1935-10-23 1936-09-18 Circuit breaker having butt contacts

Country Status (4)

Country Link
US (1) US2158920A (enrdf_load_stackoverflow)
BE (1) BE417611A (enrdf_load_stackoverflow)
FR (1) FR811643A (enrdf_load_stackoverflow)
GB (2) GB464643A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327083A (en) * 1964-12-07 1967-06-20 Allis Chalmers Mfg Co Multi-chambered arc interrupter having fluid pump

Also Published As

Publication number Publication date
BE417611A (enrdf_load_stackoverflow)
GB465380A (en) 1937-05-06
FR811643A (fr) 1937-04-19
GB464643A (en) 1937-04-22

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