GB757415A - Electromagnetic switches - Google Patents

Electromagnetic switches

Info

Publication number
GB757415A
GB757415A GB46354A GB46354A GB757415A GB 757415 A GB757415 A GB 757415A GB 46354 A GB46354 A GB 46354A GB 46354 A GB46354 A GB 46354A GB 757415 A GB757415 A GB 757415A
Authority
GB
United Kingdom
Prior art keywords
cores
magnetic circuit
magnetic
armature
jan
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
GB46354A
Inventor
Frederick Dennis Gribble
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.)
Lucas Support Services Ltd
Original Assignee
Rotax 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 Rotax Ltd filed Critical Rotax Ltd
Priority to GB46354A priority Critical patent/GB757415A/en
Priority to US489659A priority patent/US2878338A/en
Priority to FR1156763D priority patent/FR1156763A/en
Publication of GB757415A publication Critical patent/GB757415A/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
    • H01H71/1054—Means for avoiding unauthorised release
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/20—Non-polarised relays with two or more independent armatures
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/34—Electromagnetic mechanisms having two or more armatures controlled by a common winding
    • H01H71/345—Electromagnetic mechanisms having two or more armatures controlled by a common winding having a delayed movable core and a movable armature
    • 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

Abstract

757,415. Electromagnetic switches. ROTAX, Ltd. Jan. 6, 1955 [Jan. 7, 1954], No. 463/54. Class 38(5) A switch responsive to sustained but not transient overload and insensitive to acceleration, comprises a winding a on a non-magnetic bush b serving as a dashpot cylinder for two magnetic cores d, pole pieces c and an armature e completing the magnetic circuit. Springs f, g normally hold the cores in the position shown. A sufficient current in the winding a causes the cores to move towards each other with a delay produced by the dashpot action, the increased inductance of the magnetic circuit causing pivoting of the armature e against its spring j to close contacts h, i. An acceleration causes movement of the cores in the same direction and thus no change occurs in the magnetic circuit inductance.
GB46354A 1954-01-07 1954-01-07 Electromagnetic switches Expired GB757415A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB46354A GB757415A (en) 1954-01-07 1954-01-07 Electromagnetic switches
US489659A US2878338A (en) 1954-01-07 1955-02-21 Electric switches
FR1156763D FR1156763A (en) 1954-01-07 1956-09-14 Electromagnetic switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB46354A GB757415A (en) 1954-01-07 1954-01-07 Electromagnetic switches

Publications (1)

Publication Number Publication Date
GB757415A true GB757415A (en) 1956-09-19

Family

ID=9704788

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46354A Expired GB757415A (en) 1954-01-07 1954-01-07 Electromagnetic switches

Country Status (2)

Country Link
FR (1) FR1156763A (en)
GB (1) GB757415A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009024176A1 (en) * 2007-08-21 2009-02-26 Siemens Aktiengesellschaft Magnetic/hydraulic trip unit for molded case circuit breakers (mccbs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009024176A1 (en) * 2007-08-21 2009-02-26 Siemens Aktiengesellschaft Magnetic/hydraulic trip unit for molded case circuit breakers (mccbs)

Also Published As

Publication number Publication date
FR1156763A (en) 1958-05-21

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