FR743261A - - Google Patents

Info

Publication number
FR743261A
FR743261A FR743261DA FR743261A FR 743261 A FR743261 A FR 743261A FR 743261D A FR743261D A FR 743261DA FR 743261 A FR743261 A FR 743261A
Authority
FR
France
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
Application number
Other languages
French (fr)
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.)
Publication date
Application granted granted Critical
Publication of FR743261A publication Critical patent/FR743261A/fr
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F9/00—Devices preventing sparking of machines or apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
    • B23D49/007—Jig saws, i.e. machine saws with a vertically reciprocating narrow saw blade chucked at both ends for contour cutting
    • B23D49/008—Jig saws, i.e. machine saws with a vertically reciprocating narrow saw blade chucked at both ends for contour cutting hand-driven or foot-driven
    • 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
    • H01H33/92—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 liquid, e.g. oil

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
FR743261D 1931-11-18 Expired FR743261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1992109X 1931-11-18

Publications (1)

Publication Number Publication Date
FR743261A true FR743261A (en) 1933-03-25

Family

ID=10895493

Family Applications (2)

Application Number Title Priority Date Filing Date
FR743261D Expired FR743261A (en) 1931-11-18
FR768027D Expired FR768027A (en) 1931-11-18 1934-01-19 Improvements to electrical switches

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR768027D Expired FR768027A (en) 1931-11-18 1934-01-19 Improvements to electrical switches

Country Status (5)

Country Link
US (1) US1992109A (en)
BE (2) BE401277A (en)
DE (2) DE621297C (en)
FR (2) FR768027A (en)
GB (3) GB392930A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422569A (en) * 1943-05-28 1947-06-17 Westinghouse Electric Corp Circuit interrupter
US2467788A (en) * 1944-07-20 1949-04-19 Westinghouse Electric Corp Circuit interrupter
DE1142650B (en) * 1957-06-03 1963-01-24 Elettromeccaniche Scarpa & Mag Tulip contact, especially for extinguishing chamber switches
US3894204A (en) * 1974-02-19 1975-07-08 Ite Imperial Corp 38KV low current fused switch
DE102013205945A1 (en) * 2013-04-04 2014-10-09 Siemens Aktiengesellschaft Disconnecting switch device
EP3776616B1 (en) * 2018-03-28 2023-02-15 Hitachi Energy Switzerland AG Spring loaded auxiliary contact system for bus transfer switching in a center break switch

Also Published As

Publication number Publication date
DE658260C (en) 1938-03-25
GB412673A (en) 1934-07-05
DE621297C (en) 1935-11-05
BE391064A (en)
US1992109A (en) 1935-02-19
GB392926A (en) 1933-05-18
FR768027A (en) 1934-07-30
BE401277A (en)
GB392930A (en) 1933-05-18

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