GB211222A - Improvements in oil immersed electric switch gear - Google Patents

Improvements in oil immersed electric switch gear

Info

Publication number
GB211222A
GB211222A GB3125122A GB3125122A GB211222A GB 211222 A GB211222 A GB 211222A GB 3125122 A GB3125122 A GB 3125122A GB 3125122 A GB3125122 A GB 3125122A GB 211222 A GB211222 A GB 211222A
Authority
GB
United Kingdom
Prior art keywords
earthed
screen
oil
pivoted
switch
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
GB3125122A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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
Priority to FR55380D priority Critical patent/FR55380A/fr
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB3125122A priority patent/GB211222A/en
Priority to US673089A priority patent/US1559205A/en
Publication of GB211222A publication Critical patent/GB211222A/en
Expired legal-status Critical Current

Links

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
    • H01H33/02—Details
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring

Landscapes

  • Tumbler Switches (AREA)

Abstract

211,222. Trencham, H., and British Thomson-Houston Co., Ltd. Nov. 15, 1922. Oil switches.-An earthed screen is placed over the live contact of an oil switch after circuit has been broken to prevent current leaking through the oil to portions of the apparatus which should be dead. In the construction shown, the live contact of an isolating switch is enclosed in a semicylindrical casing 28 provided at the top with an aperture through which the switch blade 14, pivoted at 15, passes. Vertical movement of a rod 21 rotates a. three-armed lever 17 thereby lifting the blade 14 and moving the earthed semicylindrical screen 33 to cover the aperture in the casing 28. In a modification, a pivoted earthed screen is provided for each of two contacts that are engaged by a bridging member, and in a further modification, an earthed screen is pivoted into position by an arm on the switch operating-rod engaging a helical groove on a shaft.
GB3125122A 1922-11-15 1922-11-15 Improvements in oil immersed electric switch gear Expired GB211222A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR55380D FR55380A (en) 1922-11-15
GB3125122A GB211222A (en) 1922-11-15 1922-11-15 Improvements in oil immersed electric switch gear
US673089A US1559205A (en) 1922-11-15 1923-11-06 Electric switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3125122A GB211222A (en) 1922-11-15 1922-11-15 Improvements in oil immersed electric switch gear

Publications (1)

Publication Number Publication Date
GB211222A true GB211222A (en) 1924-02-15

Family

ID=10320295

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3125122A Expired GB211222A (en) 1922-11-15 1922-11-15 Improvements in oil immersed electric switch gear

Country Status (2)

Country Link
FR (1) FR55380A (en)
GB (1) GB211222A (en)

Also Published As

Publication number Publication date
FR55380A (en)

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