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US3518423A - Crossing frogs for railway points - Google Patents

Crossing frogs for railway points Download PDF

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Publication number
US3518423A
US3518423A US705140A US3518423DA US3518423A US 3518423 A US3518423 A US 3518423A US 705140 A US705140 A US 705140A US 3518423D A US3518423D A US 3518423DA US 3518423 A US3518423 A US 3518423A
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US
United States
Prior art keywords
vane
rails
frog
rail
frog tip
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
US705140A
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English (en)
Inventor
Walter Birnbacher
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.)
Alpine Montan AG
Original Assignee
Alpine Montan AG
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 Alpine Montan AG filed Critical Alpine Montan AG
Application granted granted Critical
Publication of US3518423A publication Critical patent/US3518423A/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B7/00—Switches; Crossings
    • E01B7/02—Tongues; Associated constructions
    • E01B7/08—Other constructions of tongues, e.g. tilting about an axis parallel to the rail, movable tongue blocks or rails
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B7/00—Switches; Crossings
    • E01B7/10—Frogs
    • E01B7/14—Frogs with movable parts

Definitions

  • the vane rails may include a shortened rail base portion, a recess being provided in the vane rails between the rail head and the shortened rail base portion for engagement with lateral projections on the frog tip.
  • An ascent may be provided at the free end of each of the vane rails to prevent a train from being de-railed in the event of a maladjustment of the rail switch or of one of the vane rails.
  • the invention refers to crossing frogs of railway points, i.e. to that part of railway points where the leading edges of two rails are crossing one another and where grooves are provided for the passage of a wheel flange.
  • a crossing frog for railway points has a so-called frog tip which is formed of the two rails converging in direction to the respective switch-tongue and being connected with one another.
  • Adjacent to said frog tip vane rails are arranged which represent extensions of the other two rails converging at the frog tip.
  • frog tip and vane rail are subjected to strong shocks accompanied by heavy wear of said both parts. Further, such shocks also give rise to strong stress of the rolling material and noise production which is quite disturbing for the passengers. For these reasons it has been tried to reduce such shock stresses by specially constructing single constructional parts, for instance by giving the vane rails an excessive height, by tapering or otherwise changing the height of the frog tip or by selecting materials of improved quality, but a substantial success has not been attained.
  • a frog tip for railway points in which an interruption of the leading edge is avoided.
  • Such a frog tip did not prove successful in practice. With such a known construction it was, above all, not possible to sufliciently secure the frog tip against rising movement, which movement might cause railway cars to go off the rails.
  • Guiding means for the pivotable frog tip with known constructions were not only provided on the railway sleepers, which have too great a distance for sufiiciently supporting the frog tip particularly at its thin end portion, but also at the stationary vane rails. For this reason it was not possible to pivotally arrange the vane rails, because such arrangement is not suitable for sufliciently 3,518,423 Patented June 30, 1970 guiding the frog tip.
  • one vane rail is movable such that it may resiliently lie on the frog tip and the other vane rail is stationary, whereby the end portion of the frog tip is connected to the stationary vane rail by means of spacing elements and such is reliably supported.
  • the present invention now aims at avoiding the drawbacks mentioned above and at providing a crossing frog for railway switches, which can be surpassed in both directions without an interruption of the leading edge of the rails and the frog tip of which is reliably guided and secured in its position, respectively.
  • the invention essentially consists in that both vane rails are swivel-mounted and in one end position of the swivelling range one of these vane rails lies closely to the frog tip and in that the frog tip is provided with lateral projections, which engage recesses in the vane rail being contacted by the frog tip.
  • the frog tip of a crossing frog according to the invention is not rigidly connected to the vane rails, but releasably connected to the respective contacting vane rail, whereby, however, the same effect is obtained as with a rigid connection between frog tip and vane rail, but additionally swivelling movement of both vane rails is possible.
  • This arrangement of the frog tip it is made possible to give the end portion of the frog tip a very small tapering angle and in spite of this to give the frog tip in its end portion also the necessary cross section. It is convenient to provide the recess within the vane rail between the shortened rail base and the rail head, so that rails of normal profile can be used as vane rails with little modification.
  • the vane rails can be locked in both end positions of their swivelling range so that unintended maladjustment of the vane rail during train passage is avoided.
  • Anchoring of the frog tip can be further improved by fixedly connecting, preferably welding, the frog tip to a base plate, preferably forming a guide for the vane rails.
  • the vane rails are, according to the invention, provided at their free end with an ascent onto which the wheel flange is smoothly running such that it may pass over the frog tip.
  • the vane rails may alternatively or additionally be bent outwardly such that the wheel flange runs between vane rail and frog tip and pushes away the frog tip.
  • FIG. 1 shows in principle a crossing frog of a railway switch according to the invention.
  • FIG. 2 shows constructional details of said crossing frog.
  • FIG. 3 is a section along line IIIIII of FIG. 5 and
  • FIG. 4 is a section along line IV--IV of FIG. 2.
  • FIG. 5 is a side elevation of a vane rail showing features according to the invention.
  • a crossing frog of a railway switch consists of a frog tip 1 and of two vane rails 2 and 3 surrounding said frog tip 1.
  • the vane rails 2 and 3 are fixedly attached to the sleepers 4 and 5 and consist, as is shown in FIG. 5 and is the case also with resilient switch tongues, of a portion 6 with normal rail profile and of a portion 7 of reduced height, both portions being welded to a single unit.
  • the portion 6 thereof has over a length L a rail base of reduced width, as is shown in FIG. 3.
  • the frog tip 1 is welded to a base plate as shown in FIG. 4 which also provides a guide for both vane rails 2 and 3 and securely supports the frog tip in its end portion.
  • the vane rails 2 and 3 are provided with an inclined contacting face 8 at the area with which these vane rails are contacting the frog tip 1, said inclined face being arranged to suit the head portion of the frog tip 1. Furthermore, the frog tip 1 is provided in the area of contact with the vane rails 2 and 3, respectively, with a recess 9 which is engaged by a projection 10, represented by a shortened half of the rail base of the vane rails 2 and 3, respectively.
  • both end positions of the swivelling range of the vane rails be lockable, so that the respective vane rail contacting the frog tip 1 is securely anchored in its position.
  • one clamp 12 is provided for each vane rail 2 and 3, respectively, and connected to its associated vane rail by means of a joint 11, whereby the clamp 12 is provided at its end distant from the joint 11 with a clamp head 13. Both clamps are shifted by a rod 14, which is provided with recesses 15. A locking part 16 for each of the clamps is also provided.
  • the vane rails 2 and 3 are, as is shown in FIG. 5, provided at their free ends with an ascent 22, the height t thereof being dimensioned such that also wheel flanges maximally worn out are smoothly travelling onto said ascent.
  • the vane rails 2 and 3 may at their free ends be bent outwardly, as is shown in FIG. 2 in dash-dotted lines at 23.
  • Crossing frog for rails comprising a frog tip and two vane rails surrounding the frog tip, means supporting each of said vane rails for swivelling movement such that one of said two vane rails is always contacting said frog tip in the end positions of the swivelling range, said frog tip and each of said vane rails including mutually corresponding lateral projections and recesses which engage when one of said vane rails contacts said frog tip.
  • each of said vane rails are formed by Vignol-rails having a shortened rail base, each of said vane rails including a recess in the region of the stem of the rail between the rail head and the shortened rail base, said frog tip including lateral projections engaging in said recess of a vane rail in contact therewith.
  • Crossing frog according to claim 1 further including means for locking each of said vane rails in both end positions of their swivelling range.
  • Crossing frog according to claim 1, further including an ascent at the free ends of each of said vane rails.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Mechanisms For Operating Contacts (AREA)
US705140A 1967-02-17 1968-02-13 Crossing frogs for railway points Expired - Lifetime US3518423A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT160367A AT288463B (de) 1967-02-17 1967-02-17 Weichen-Herzstück

Publications (1)

Publication Number Publication Date
US3518423A true US3518423A (en) 1970-06-30

Family

ID=3516984

Family Applications (1)

Application Number Title Priority Date Filing Date
US705140A Expired - Lifetime US3518423A (en) 1967-02-17 1968-02-13 Crossing frogs for railway points

Country Status (8)

Country Link
US (1) US3518423A (da)
AT (1) AT288463B (da)
CH (1) CH469141A (da)
DE (2) DE1708647A1 (da)
DK (1) DK143507C (da)
FI (1) FI48766C (da)
NO (1) NO122757B (da)
SE (1) SE327426B (da)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3723728A (en) * 1970-01-17 1973-03-27 Butzbacher Weichenbau Gmbh Crossing frog with a movable frog point
US3787680A (en) * 1971-06-21 1974-01-22 Paris & Outreau Acieries Cast steel railway crossing
FR2324800A1 (fr) * 1973-01-18 1977-04-15 Paris & Outreau Acieries Coeur de croisement de grande longueur pour voies ferrees a circulation a grande vitesse
GB2144467A (en) * 1983-08-05 1985-03-06 Grant Lyon Eagre Limited Railway switch
US20110011986A1 (en) * 2008-01-14 2011-01-20 Vae Eisenbahnsysteme Gmbh Switch with movable frog point
ES2399735R1 (es) * 2010-06-15 2013-05-20 Jez Sist S Ferroviarios S L Corazon agudo de punta movil para aparatos de via de carril garganta

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3024222C2 (de) * 1980-06-27 1983-01-27 Mannesmann AG, 4000 Düsseldorf Tunnel- oder Streckenvortriebsmaschine
AT390084B (de) * 1988-05-20 1990-03-12 Voest Alpine Maschinenbau Weiche mit einem herzstueck mit beweglicher haupt- und beispitze
DE3828921C3 (de) * 1988-08-26 2000-10-26 Weichenbau Laeis Gmbh & Co Kg Verfahren zum Herstellen einer Weiche mit Herzstück mit federndbeweglicher Spitze sowie eine Weiche mit Herzstück

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US328815A (en) * 1885-10-20 Railroad-frog
US1660694A (en) * 1927-06-27 1928-02-28 Francis M Volk Railway frog
US1784211A (en) * 1927-12-24 1930-12-09 Anthony L Vissat Railway-crossover frog construction
US2044283A (en) * 1932-12-27 1936-06-16 Conley John Edward Railway frog

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US328815A (en) * 1885-10-20 Railroad-frog
US1660694A (en) * 1927-06-27 1928-02-28 Francis M Volk Railway frog
US1784211A (en) * 1927-12-24 1930-12-09 Anthony L Vissat Railway-crossover frog construction
US2044283A (en) * 1932-12-27 1936-06-16 Conley John Edward Railway frog

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3723728A (en) * 1970-01-17 1973-03-27 Butzbacher Weichenbau Gmbh Crossing frog with a movable frog point
US3787680A (en) * 1971-06-21 1974-01-22 Paris & Outreau Acieries Cast steel railway crossing
FR2324800A1 (fr) * 1973-01-18 1977-04-15 Paris & Outreau Acieries Coeur de croisement de grande longueur pour voies ferrees a circulation a grande vitesse
GB2144467A (en) * 1983-08-05 1985-03-06 Grant Lyon Eagre Limited Railway switch
US20110011986A1 (en) * 2008-01-14 2011-01-20 Vae Eisenbahnsysteme Gmbh Switch with movable frog point
US8746630B2 (en) 2008-01-14 2014-06-10 Vae Eisenbahnsysteme Gmbh Switch with movable frog point
ES2399735R1 (es) * 2010-06-15 2013-05-20 Jez Sist S Ferroviarios S L Corazon agudo de punta movil para aparatos de via de carril garganta

Also Published As

Publication number Publication date
SE327426B (da) 1970-08-24
DK143507C (da) 1982-02-22
DE1708647A1 (de) 1971-10-21
FI48766B (da) 1974-09-02
CH469141A (de) 1969-02-28
DE6609528U (de) 1972-06-22
AT288463B (de) 1971-03-10
DK143507B (da) 1981-08-31
FI48766C (fi) 1974-12-10
NO122757B (da) 1971-08-09

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