GB958235A - Electromagnetic switching device - Google Patents

Electromagnetic switching device

Info

Publication number
GB958235A
GB958235A GB42425/60A GB4242560A GB958235A GB 958235 A GB958235 A GB 958235A GB 42425/60 A GB42425/60 A GB 42425/60A GB 4242560 A GB4242560 A GB 4242560A GB 958235 A GB958235 A GB 958235A
Authority
GB
United Kingdom
Prior art keywords
flux
inductance
limbs
electromagnet
windings
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
GB42425/60A
Inventor
Roger John Webb
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal 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 Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB42425/60A priority Critical patent/GB958235A/en
Priority to US157345A priority patent/US3235744A/en
Priority to FR881352A priority patent/FR1307705A/en
Publication of GB958235A publication Critical patent/GB958235A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/80—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices
    • H03K17/82—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices the devices being transfluxors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L7/00—Remote control of local operating means for points, signals, or track-mounted scotch-blocks
    • B61L7/06—Remote control of local operating means for points, signals, or track-mounted scotch-blocks using electrical transmission
    • B61L7/068—Protection against eddy-currents, short-circuits, or the like, for electric safety arrangements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/80—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnets (AREA)
  • Magnetic Treatment Devices (AREA)

Abstract

958,235. Inductors. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd. Oct. 30, 1961 [Dec. 9, 1960], No. 42425/60. Heading H1T. [Also in Division H3] A switching device includes a closed loop magnetic core L 1 , L 2 , L 3 , L 4 with a winding W 1 , W 2 whose inductance is switched between relatively high and low values in dependence on the relative directions of magnetization of the magnets M and EM which are arranged as shown. The electromagnet EM has a high remanence, so that its direction of magnetization depends on the sense of the last signal in the D.C. control winding W 3 . The permanent magnet M has its flux adjusted by the air gaps g to be equal to that of the electromagnet. The geometry is preferably such that the flux from one of the magnets, if the other were absent, would divide in the ratio 3 : 1 between its two possible paths. If EM is magnetized so that P 3 is south and P 4 north, then limbs L 3 and L 4 are saturated. Windings W 1 , W 2 then have a low inductance. If EM is reversed then the fluxes are in limbs W 1 , W 2 and are of about half the previous value. If this is below the saturation flux the windings W 1 , W 2 will possess a relatively high inductance. The arrangement may be used in railway signalling systems where it is essential that, after a period of supply failure, the switch responds to the last control signal received.
GB42425/60A 1960-12-09 1960-12-09 Electromagnetic switching device Expired GB958235A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB42425/60A GB958235A (en) 1960-12-09 1960-12-09 Electromagnetic switching device
US157345A US3235744A (en) 1960-12-09 1961-12-06 Electromagnetic alternating current switching device
FR881352A FR1307705A (en) 1960-12-09 1961-12-08 Electromagnetic switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB42425/60A GB958235A (en) 1960-12-09 1960-12-09 Electromagnetic switching device

Publications (1)

Publication Number Publication Date
GB958235A true GB958235A (en) 1964-05-21

Family

ID=10424358

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42425/60A Expired GB958235A (en) 1960-12-09 1960-12-09 Electromagnetic switching device

Country Status (2)

Country Link
US (1) US3235744A (en)
GB (1) GB958235A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1494157A (en) * 1966-07-06 1967-09-08 Jeumont Schneider Static elements with logical functions
US3832566A (en) * 1969-06-19 1974-08-27 M Gerry Distortionless magnetic logic elements

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1739579A (en) * 1928-06-20 1929-12-17 Union Switch & Signal Co Electrical translating apparatus
BE495835A (en) * 1949-05-20 1900-01-01
US2741757A (en) * 1950-05-12 1956-04-10 Devol Magnetic storage and sensing device
US2730694A (en) * 1951-02-02 1956-01-10 Ferranti Ltd Amplitude recording system utilizing saturable core reactors

Also Published As

Publication number Publication date
US3235744A (en) 1966-02-15

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