US2527383A - Electromagnetic rail brake - Google Patents

Electromagnetic rail brake Download PDF

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Publication number
US2527383A
US2527383A US767376A US76737647A US2527383A US 2527383 A US2527383 A US 2527383A US 767376 A US767376 A US 767376A US 76737647 A US76737647 A US 76737647A US 2527383 A US2527383 A US 2527383A
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US
United States
Prior art keywords
brake
elements
shoe
side frames
rail
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 - Lifetime
Application number
US767376A
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English (en)
Inventor
Zuckermann Armand
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.)
Freins Jourdain Monneret SA
Freins Jourdain-Monneret SA
Original Assignee
Freins Jourdain Monneret SA
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 Freins Jourdain Monneret SA filed Critical Freins Jourdain Monneret SA
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Publication of US2527383A publication Critical patent/US2527383A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H7/00—Brakes with braking members co-operating with the track
    • B61H7/02—Scotch blocks, skids, or like track-engaging shoes
    • B61H7/04—Scotch blocks, skids, or like track-engaging shoes attached to railway vehicles
    • B61H7/06—Skids
    • B61H7/08—Skids electromagnetically operated

Definitions

  • the present invention relates to improvements in electromagnetic track brakes for railway-cars.
  • each of them comprising an individual core on which is wound an individual coil, each core also carrying side elements on which shoe elements are fixed.
  • the opposite end brake elements are fixedly secured on a guiding frame .while the intermediate brake elements are freely'mounted on the frame, so that they may freely move in the vertical direction and freely pivotabout their edges of attach.
  • the weight of each of the movable intermediate brake elements is sufficiently great, by reason of its yinclusion of a separate coil and'core, to induce rebouiidsQand the relative rigidity of .the terminal oropposite end brake elements resultsin longitudiri'al air gaps when said'latter brake elements contact a part of the rail projecting beyond the tread of said rail.
  • the'main object of the invention is to provide an electromagnetic track brake, the brake heads of which are of the kindcomprising successive separate brake elements, wherein all of the brake elements are freely movable vertically with respect to a common core and are also free to pivot in a vertical plane wherebythe brake elements contact the rail regardless of the irregularities'of its tread.
  • each of the brake heads are fixed to the railway-car by 'meansjof a device which allows independent transverse displacement of each of the brake heads-and its pivotal movement about an axis parallel to the track, whereby the brake elements in each headcontact the associated rail regard less of the differences in rail wear and rail gauge.
  • Another object of the invention is to provide an electromagnetic track brake of the character described wherein the elementary brake elements are formed by shoe elements freely mounted on pins supported by the common core and common side frames, whereby no rebound is obtained due to the relative lightnesstof each of the elementary brake shoes...
  • a further objectltof this invention is to provide an electromagnetic track brake of thecharacter described; in which each of the shoe elements is formed of a pair of magnetic shoes having 'a non-magnetic liner interposed therebetween, and in which the recesseson the opposite ends of each shoe element for receivingthe mounting pins are formed in the non-magnetic liner with the-ends of the magnetic shoes being merely cut-back to provide clearance whereby the difficult machining of the magnetic material is eliminated.
  • Figure v1 is a diagrammatic side elevation of one of the brake heads, with one of the side frames cut away to show the hinged shoe elements;
  • Figure 2 is a fragmentary vertical longitudinal section showing the hinged connection of the shoe elements in the brake head
  • F igure 3 is .afragmentary vertical longitudinal section of a portion of a shoe element having a non-magnetic liner
  • Figure l is an .end elevation of the shoe element illustrated in Figure 3;
  • Each brake head A includes. a pair of parallel extending vertical frames I, having the single coil 3 and core 3a fixed therebe-- tween. Extending between the lower portions of the side frames I are the fixed longitudinally spaced apart pins I9'and I9b. The opposite end pins being referred to by the numeral I912.
  • Brake shoe elements I8 and I8b are loosely received between the lower portions of the side frames I.
  • the opposite end shoes I819 are formed on the end edges thereof facing the next adjacent intermediate shoe I8 with notches 2011 for loosely receiving the pins I9, and the intermediate shoe elements I 8 are formed with identical notches 20 formed in the opposite end edges 6 thereof.
  • Each of the notches 20 includes a vertical flat surface 20a and quadri-cylindrical surfaces 201) at the top and bottom ends of the flat surface. radii of the quadri-cylindrical surfaces 222) are equal to that of the pins I9.
  • each of the shoe elements is substantially less than the distance between the surfaces of-the-pins t9 which the notches receive to thereby provide substantial clearance.
  • the independent intermediate shoe elements I8 may then move vertically relative to the side frames I, and also pivot. in a vertical plane.
  • Each of the opposite end shoe elements I8b in addition to the notches 2nd formed in the end edges as noted above, is formed with an elongated slot 200, intermediate the length :thereof, which loosely receives the adjacent end pin I912.
  • the end shoes I812 are thensupported from the side frames by the end pin I 917 and the next intermediate pin I 9. -By reason of the clearance between the end notches'and the slots and the respective pins, the end shoes [82) may also-move vertically and pivot in a vertical 'plane relative to the side frames:
  • each of .the shoe elements I8 and IBb is freely movable in the directions noted above, the shoe elements will closely follow the longitudinal configuration of the underlying railand the longitudinal 'air-gaps'between the shoes and'the rail will be substantially reduced ⁇
  • the shoe elements I8 and I81 will be urgedagainst the underlying rail through which the magnetic field will be completed.
  • Each shoe element is then submitted to a substantially horizontal force F in a direction opposed to the motion'of the railway car.
  • the fiat portion 200. of each notch 20 the force will always be exerted normal to the point of contact of the pins IS with the flat portion. Therefore, there will be'no component of the braking force tending to rotate the shoe element and thus produce uneven pressure and wear on the braking surface of the shoe.
  • a shoe element which consists of a pair of spaced outer portions 2
  • and 22 are secured together, and the outer portions are cut-back at the opposite ends as at 23.
  • the notches 20 for receiving the pins I9 are then formed only in the end edges of the nonmagnetic liner 22. Since the recesses 23 of magnetic outer portions 2I of the shoe element do not engage the pins I9 there is no need to machine these recesses to close tolerances, and the portions 2
  • FIG. 5 a preferred mounting of the opposite brake heads is illustrated. Since the distance between the rails may vary, and since the top surfaces of the rails may not always be transversely horizontal because of uneven wear, it is important that the opposite brake heads be permitted, to move transversely, independent of each other, and also that they be mounted for pivoting about horizontal axes parallel to the rails. Such mounting of the brake heads will reduce the transverse air gaps between the rails and the shoe elements.
  • the preferred mounting includes a cross-member I0 supported at its opposite ends by the rods 4. The rods 4 are supported by spring members interposed between fixed members 5 of the railway-car truck and the top ends of the rods.
  • the opposite brake heads A are dependingly carried from the cross-member Iii by the links 26, pivoted on pivot pins 21 on the cross-member, and the stirrups 29.
  • the stirrups 29 are pivotally connected to the lower ends of the links 26 by the pins 28.
  • FIG. 6 a suitable pivotal connection between the links 26 and the pivot pins 21 is shown-
  • the link 26 has atubular member 38 fixed in one end thereof.
  • a bushing 32 of plastic material is received by the member 30, and an inner tube 3
  • an electromagnetic track brake for a railway car, a transversely extending cross-mem her, a brake head disposed at right angles to said cross-member at each of the opposite ends of the latter, link means supporting each of said brake-heads from said cross-member, said link means being pivoted at the opposite ends thereof and movable in a vertical transverse plane whereby each of said brake heads may move transversely and also rock about an axis parallel to the underlying rail independent of the other brake head, each of said brake heads including a pair of side frames, a common coil and core carried by said side frames, a plurality of longitudinally arranged independent shoe elements projecting beyond the bottom edges of said side frames, and means loosely mounting said shoe elements between said side frames adapted topermit up and down linear movement of said elements in a plane parallel to the plane of said side frames and rocking of said elements in said plane of up and down movement whereby said elements may conform substantially to the longitudinal configuration of the underlying rail.
  • each of said brake heads includin a frame, a single magnetizing coil and core, a plurality of indepedent shoe elements for braking contact with the underlying rail, and means mounting said elements on said frame adapted to permit up and down movement of each element relative to said frame and independent rocking of said elements in a substantially vertical longitudinal plane.
  • each of the intermediate shoe elements is formed with vertically elongated recesses in the opposite end edges thereof
  • each of the opposite end shoe elements is formed with a vertically elongated recess in the end edge thereof confronting the adjacent intermediate shoe element and with a vertically elongated opening intermediate the length of said end shoe element
  • the last mentioned mounting means includes a plurality of longitudinally spaced apart cross-pins carried by said side frames and loosely received in said end edge recesses and in said openings, substantial longitudinal clearance being provided between said pins and said recesses and openings to thereby permit up and down movement of said elements and rocking of the latter in a substantially vertical longitudinal plane.
  • the first mentioned mounting means includes a resiliently supported cross-member, a link for each of said brake heads pivoted at one end to said crossmember and rocking in a transverse plane, a stirrup pivotally mounted at its center on the opposite end of each of said links for rocking in a transverse plane, each of said stirrups being secured at the ends thereof to one of said brake heads whereby each of said brake heads may move at right angles to the longitudinal axis and also rock in a transverse plane to thereby conform to the transverse contours of the underlying rails.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
US767376A 1946-08-10 1947-08-08 Electromagnetic rail brake Expired - Lifetime US2527383A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1002190T 1946-08-10

Publications (1)

Publication Number Publication Date
US2527383A true US2527383A (en) 1950-10-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
US767376A Expired - Lifetime US2527383A (en) 1946-08-10 1947-08-08 Electromagnetic rail brake

Country Status (5)

Country Link
US (1) US2527383A (xx)
BE (1) BE470306A (xx)
CH (1) CH264181A (xx)
FR (1) FR1002190A (xx)
GB (1) GB649784A (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730198A (en) * 1951-06-14 1956-01-10 Transit Res Corp Track brake assembly
CN102431571A (zh) * 2011-10-24 2012-05-02 南车株洲电力机车有限公司 一种磁轨制动器连接装置及磁轨制动装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO153291C (no) * 1982-02-24 1986-02-19 Oerlikon Buehrle Ag Permanentmagnetskinnebremse.
GB9217671D0 (en) * 1992-08-20 1992-09-30 Barlian Technik Limited Earthing of enclosures
CN107804339A (zh) * 2017-12-05 2018-03-16 四川汇智众创科技有限公司 隧道机车铁鞋制动装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US545554A (en) * 1895-09-03 Alternating-current generator or motor
US663519A (en) * 1899-05-22 1900-12-11 Rudolf Willy Max Schiemann Electric rail-brake.
US2054716A (en) * 1931-11-16 1936-09-15 Stedefeld Electromagnetic rail brake
FR820150A (fr) * 1936-07-09 1937-11-04 Freins Jourdain Monneret Perfectionnements aux freins sur rails
FR823411A (fr) * 1936-09-29 1938-01-20 Freins Jourdain Monneret Perfectionnements apportés aux patins de freins électromagnétiques sur rails, dérivés du type bipolaire
FR827409A (fr) * 1937-09-21 1938-04-26 Oerlikon Maschf Frein sur rail électromagnétique
DE678156C (de) * 1937-12-11 1939-07-10 Aeg Aufhaengung von Schienenbremsen
US2207295A (en) * 1938-12-08 1940-07-09 J G Brill Co Rail brake for railway cars

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US545554A (en) * 1895-09-03 Alternating-current generator or motor
US663519A (en) * 1899-05-22 1900-12-11 Rudolf Willy Max Schiemann Electric rail-brake.
US2054716A (en) * 1931-11-16 1936-09-15 Stedefeld Electromagnetic rail brake
FR820150A (fr) * 1936-07-09 1937-11-04 Freins Jourdain Monneret Perfectionnements aux freins sur rails
FR823411A (fr) * 1936-09-29 1938-01-20 Freins Jourdain Monneret Perfectionnements apportés aux patins de freins électromagnétiques sur rails, dérivés du type bipolaire
FR827409A (fr) * 1937-09-21 1938-04-26 Oerlikon Maschf Frein sur rail électromagnétique
DE678156C (de) * 1937-12-11 1939-07-10 Aeg Aufhaengung von Schienenbremsen
US2207295A (en) * 1938-12-08 1940-07-09 J G Brill Co Rail brake for railway cars

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730198A (en) * 1951-06-14 1956-01-10 Transit Res Corp Track brake assembly
CN102431571A (zh) * 2011-10-24 2012-05-02 南车株洲电力机车有限公司 一种磁轨制动器连接装置及磁轨制动装置
CN102431571B (zh) * 2011-10-24 2014-04-16 南车株洲电力机车有限公司 一种磁轨制动器连接装置及磁轨制动装置

Also Published As

Publication number Publication date
GB649784A (en) 1951-01-31
BE470306A (xx)
FR1002190A (fr) 1952-03-03
CH264181A (fr) 1949-09-30

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