GB541281A - Improvements in or relating to electric switches having knuckling contacts - Google Patents

Improvements in or relating to electric switches having knuckling contacts

Info

Publication number
GB541281A
GB541281A GB1318940A GB1318940A GB541281A GB 541281 A GB541281 A GB 541281A GB 1318940 A GB1318940 A GB 1318940A GB 1318940 A GB1318940 A GB 1318940A GB 541281 A GB541281 A GB 541281A
Authority
GB
United Kingdom
Prior art keywords
contact
pivoted
knuckling
angle
contacts
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
GB1318940A
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.)
CHARLES JOSEPH OLIVER GARRARD
General Electric Co PLC
Original Assignee
CHARLES JOSEPH OLIVER GARRARD
General Electric Co PLC
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 CHARLES JOSEPH OLIVER GARRARD, General Electric Co PLC filed Critical CHARLES JOSEPH OLIVER GARRARD
Priority to GB1318940A priority Critical patent/GB541281A/en
Publication of GB541281A publication Critical patent/GB541281A/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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/045—Means for extinguishing or preventing arc between current-carrying parts for arcs formed during closing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

541,281. Switches, partly electromagnetic. GENERAL ELECTRIC CO., Ltd., GARRARD, C. J. O., and RANDALL, H. Aug. 19, 1940. Nos. 13189/40 and 3621/41. [Class 38 (v)] A contact-arrangement for a contactor or circuit-breaker comprises a movable arm 2 pivoted at 3, a fixed contact 1, and a knuckling contact 4 pivoted to 2 at 5 and initially engaging 1 at the point 6, such that the angle between the continuous lines a, b, is acute (not obtuse) and approaches a right-angle in the fully-closed position with contacts 1, 4 engaging over their entire surfaces. The current loop effect of 2, 4 thus supports the spring (not shown) biassing 4 away from 2, and overpowers the smaller throw-off effect indicated by the obtuse angle between the lines c, a. In Fig, 5, the contact 4 is pivoted to the fixed member 1 at 5 and initially engages the movable arm 2 at 6, the effect of the loop a, b, tending to increase the contactpressure.
GB1318940A 1940-08-19 1940-08-19 Improvements in or relating to electric switches having knuckling contacts Expired GB541281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1318940A GB541281A (en) 1940-08-19 1940-08-19 Improvements in or relating to electric switches having knuckling contacts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1318940A GB541281A (en) 1940-08-19 1940-08-19 Improvements in or relating to electric switches having knuckling contacts

Publications (1)

Publication Number Publication Date
GB541281A true GB541281A (en) 1941-11-20

Family

ID=10018469

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1318940A Expired GB541281A (en) 1940-08-19 1940-08-19 Improvements in or relating to electric switches having knuckling contacts

Country Status (1)

Country Link
GB (1) GB541281A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545341A (en) * 1944-04-22 1951-03-13 Ite Circuit Breaker Ltd Blow on arc tip
US2601484A (en) * 1949-11-16 1952-06-24 Ite Circuit Breaker Ltd Blow open, blow closed circuit breaker
US2821600A (en) * 1953-08-14 1958-01-28 Ite Circuit Breaker Ltd Circuit breaker operating mechanism
EP0072771A1 (en) * 1981-08-11 1983-02-23 Siemens Aktiengesellschaft One or multiphase switch for an encapsulated, gas-insulated high-voltage switchgear

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545341A (en) * 1944-04-22 1951-03-13 Ite Circuit Breaker Ltd Blow on arc tip
US2601484A (en) * 1949-11-16 1952-06-24 Ite Circuit Breaker Ltd Blow open, blow closed circuit breaker
US2821600A (en) * 1953-08-14 1958-01-28 Ite Circuit Breaker Ltd Circuit breaker operating mechanism
EP0072771A1 (en) * 1981-08-11 1983-02-23 Siemens Aktiengesellschaft One or multiphase switch for an encapsulated, gas-insulated high-voltage switchgear

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