GB740361A - Improvements in and relating to electromagnetic circuit breakers - Google Patents

Improvements in and relating to electromagnetic circuit breakers

Info

Publication number
GB740361A
GB740361A GB2071252A GB2071252A GB740361A GB 740361 A GB740361 A GB 740361A GB 2071252 A GB2071252 A GB 2071252A GB 2071252 A GB2071252 A GB 2071252A GB 740361 A GB740361 A GB 740361A
Authority
GB
United Kingdom
Prior art keywords
arm
pivot
contact
crank
magnet
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
GB2071252A
Inventor
Cyril Frederick Gimson
Jeffrey Rose
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
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB2071252A priority Critical patent/GB740361A/en
Priority to ES0210836A priority patent/ES210836A1/en
Priority to ES0210835A priority patent/ES210835A1/en
Publication of GB740361A publication Critical patent/GB740361A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • H01H71/443—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay with dash-pot

Landscapes

  • Mechanisms For Operating Contacts (AREA)
  • Breakers (AREA)
  • Push-Button Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

740,361. Electrically-released switches. BRITISH THOMSON-HOUSTON CO. Ltd. Aug. 10, 1953 [Aug. 18, 1952], No. 20712/52. Class 38(5) A circuit-breaker comprises a contact carrying arm 1 pivotally supported at 6 on a magnetic arm 4 mounted on a fixed pivot 5, a tension spring 7 being connected to the arm 1 below the pivot 6. To close the breaker an electromagnet 9 is energized to attract its plunger 10 pivotally connected to a bell crank lever 11 pivoted at 12, whereby a roller 13 on the lever 11 rotates the arm 1 counterclockwise about pivot 6 until the arm is arrested by engaging pivot 5 acting as a stop. Both arms 1, 4 then pivot clockwise about pivot 5 and the arm 4 is held by an electromagnet 8. It is arranged for magnet 9 to be de-energized at this stage whereby the lever 11 retracts from the arm 1 and the arm is moved by spring 7 so that contact 2 engages fixed contact 3. To prevent the shock of contact engagement from unseating the arm 4 from the magnet 8, the arm 1 is given a retarded movement by connecting it through a link 14 to the outer crank 19 of a dashpot 15, the crank 19 being mounted on a shaft 16 carrying an inner crank 17 connected to a piston rod 18. High speed opening of the contacts 2, 3 upon de-energization of the magnet 8 is, however, enhanced by the dashpot, since it discourages pivotting of the arm 1 about pivot 6 and instead causes the arms 1, 4 to pivot about 5, the contact 2 thereby having a greater movement.
GB2071252A 1952-08-18 1952-08-18 Improvements in and relating to electromagnetic circuit breakers Expired GB740361A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2071252A GB740361A (en) 1952-08-18 1952-08-18 Improvements in and relating to electromagnetic circuit breakers
ES0210836A ES210836A1 (en) 1952-08-18 1953-08-11 Improvements in and relating to electromagnetic circuit breakers
ES0210835A ES210835A1 (en) 1952-08-18 1953-08-11 A camshaft rotary switch (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2071252A GB740361A (en) 1952-08-18 1952-08-18 Improvements in and relating to electromagnetic circuit breakers

Publications (1)

Publication Number Publication Date
GB740361A true GB740361A (en) 1955-11-09

Family

ID=10150421

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2071252A Expired GB740361A (en) 1952-08-18 1952-08-18 Improvements in and relating to electromagnetic circuit breakers

Country Status (2)

Country Link
ES (2) ES210835A1 (en)
GB (1) GB740361A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158714A (en) * 1961-03-06 1964-11-24 Ite Circuit Breaker Ltd Spring-close high speed breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158714A (en) * 1961-03-06 1964-11-24 Ite Circuit Breaker Ltd Spring-close high speed breaker

Also Published As

Publication number Publication date
ES210835A1 (en) 1953-12-16
ES210836A1 (en) 1953-12-16

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