FR768027A - Improvements to electrical switches - Google Patents

Improvements to electrical switches

Info

Publication number
FR768027A
FR768027A FR768027DA FR768027A FR 768027 A FR768027 A FR 768027A FR 768027D A FR768027D A FR 768027DA FR 768027 A FR768027 A FR 768027A
Authority
FR
France
Prior art keywords
electrical switches
switches
electrical
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
Application number
Other languages
French (fr)
Inventor
George Ethelbert Whitehead
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 S Electrical Inv S L
Original Assignee
Whitehead S Electrical Inv S L
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 S Electrical Inv S L filed Critical Whitehead S Electrical Inv S L
Application granted granted Critical
Publication of FR768027A publication Critical patent/FR768027A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
FR768027D 1931-11-18 1934-01-19 Improvements to electrical switches Expired FR768027A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
FR768027A true FR768027A (en) 1934-07-30

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 Before (1)

Application Number Title Priority Date Filing Date
FR743261D Expired FR743261A (en) 1931-11-18

Country Status (5)

Country Link
US (1) US1992109A (en)
BE (2) BE401277A (en)
DE (2) DE621297C (en)
FR (2) FR768027A (en)
GB (3) GB392926A (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
GB392926A (en) 1933-05-18
BE391064A (en)
DE658260C (en) 1938-03-25
GB412673A (en) 1934-07-05
GB392930A (en) 1933-05-18
BE401277A (en)
US1992109A (en) 1935-02-19
FR743261A (en) 1933-03-25
DE621297C (en) 1935-11-05

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