US3787680A - Cast steel railway crossing - Google Patents

Cast steel railway crossing Download PDF

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Publication number
US3787680A
US3787680A US00263700A US3787680DA US3787680A US 3787680 A US3787680 A US 3787680A US 00263700 A US00263700 A US 00263700A US 3787680D A US3787680D A US 3787680DA US 3787680 A US3787680 A US 3787680A
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crossing
point
cast steel
steel railway
movable
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US00263700A
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R Perrot
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Acieries De Paris & D Ortreau fr
Paris & Outreau Acieries
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Paris & Outreau Acieries
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    • 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

  • ABSTRACT This cast steel crossing with movable point is characterized in that the heel portion of the point is clamped on a triangular boss projecting from the crossing proper on which it can swing from one position to the other position, and that a horizontal key having a partspherical central portion is provided for holding said heel portion of the point on said crossing boss, in order to eliminate the so-called gap section in the central portion of the crossing and therefore avoidthe abnormal stress heretofore exertedon the wheel tires on account of the insufficient rolling surface of convention'al crossings.
  • the present invention relates in general to railway crossings and has specific reference to cast steel crossings of this character.
  • the present invention provides an improved railway cast steel crossing of the movable point type, characterized in that the heel portion of the point is fork-shaped and fits on either side of a triangular boss or projection of the crossing so that it can swing from one to the other position, and that a horizontal key having a part-spherical central portion is adapted to hold said heel portion of the point on said boss.
  • the heel portion of the point comprises to this. end a vertical V-shaped end notch forming two lateral wings disposed with a slight clearance on either side of said triangular boss of the crossing, the latter, also of elongate configuration, comprising a slightly swollen portion in the .key area about which the point can swivel between'its two positions.
  • FIG. I is a plan view from above of the crossing according to this invention.
  • FIG. 2 is a longitudinal section taken substantially along the line IIIl of FIG. 1;
  • FIG. 3 is an end view of one of the sides of this cross- FIGS. 4 to 6 are cross sections taken on a larger scale along the lines IV-IV, V-V and VIVI respectively of FIG. 1;
  • FIG. 7 is an end view of the other end of the crossing
  • FIG. 8 is a part-sectional and fragmentary plan view showing on a larger scale a datail of the crossing.
  • the cast steel railway crossing l illustrated in the drawing and designed according to the present invention is characterized in that its movable point 2 is adapted to swing from one position to its other position on a triangular boss 3 without using any vertical pivot pin, shaft or the like.
  • the heel portion of the point has formed therein a V-shaped elongated vertical notch forming two wings 4, 5 fitting with a slight clearance on either side of said triangular boss 3 also of elongated configuration; a horizontal key 6 having a part-spherical central portion 7 holds the two wings 4, 5 on the boss 3.
  • This boss 3 comprises in the key area a slightly swollen portion 8 about which the point is adapted to swing from one position to the other position.
  • the rear ends of the point wings 4, 5 are bevelled in order to engage in each position of said point with the likewise bevelled ends respectively of the pair of upstream rails 11 and 12, in order to avoid any break of continuity along one or the other rolling lines of the crossing.
  • the movable point 2 is carried by wear and friction plates 13, preferably in the form of inserts secured by welding to the crossing base plate and consisting advantageously of manganese steel.
  • the two downstream rails of the crossing are each provided with a cavity 16, 17 aligned with a corresponding cavity 18 formed in the point,in the vicinity of its front end, to permit the passage of a bar for guiding the movements of said point and adapted to be controlled or driven from a power unit through a wormand-gear mechanism or any other sufficiently reliable mechanism.
  • the movable-point cast steel crossing according to this invention is also advantageous in that it comprises two separate portions, i.e. the crossing proper and the point, so that each portion can be made from the material best suited to its specific function.
  • the crossing may be made from a steel having the same density as the rails associated therewith, thus permitting an easy assembling by welding and eliminating fish-plates; and the point may be-cast from high-grade steel in order to improve its strength under different stresses; moreover, the replacement of the point is extremely easy due to its fitting in the crossing with the assistance of a cross key.
  • the heel portion of the point is crossing, said crossing proper being likewise of elongated configuration and provided with a slightly swollen portion in the key area about which the point can swing from one position to the other position.
  • - stream rails of the crossing are each formed with a cavity aligned with another cavity formed in said point in the vicinity of its front end, to permit the passage of a bar for guiding the movements of said point, said bar being driven from a power unit of the worm-and-gear type or of any other suitable type having a sufficient reliability.

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  • Engineering & Computer Science (AREA)
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Abstract

This cast steel crossing with movable point is characterized in that the heel portion of the point is clamped on a triangular boss projecting from the crossing proper on which it can swing from one position to the other position, and that a horizontal key having a part-spherical central portion is provided for holding said heel portion of the point on said crossing boss, in order to eliminate the so-called ''''gap'''' section in the central portion of the crossing and therefore avoid the abnormal stress heretofore exerted on the wheel tires on account of the insufficient rolling surface of conventional crossings.

Description

United States Patent [191 Perrot [4 1 Jan. 22, 1974 CAST STEEL RA ILWAY CROSSING [75] Inventor: Robert Pei-rot, Pont-de-Briques,
France [73] Assignee: Acieries De Paris & DOrtreau, Paris, France [22] Filed: June 16, 1972 [21] Appl. No.: 263,700
[30] Foreign Application Priority Data June 21, 1971 France 7122452 [52] US. Cl 246/377, 246/375, 246/465, v 246/468 [51] Int. Cl E0lb 7/10 [58] Field of Search... 246/435, 436, 438, 442, 379,
[56] References Cited UNITED STATES PATENTS 4/1876 .l-larreff 246/436- 3,099,427 7/1963 Brown 246/435 R 3,403,251 9/1968 Pale et a1. 246/415 R 3,518,423 6/1970 Birnbacher 246/468 Primary ExaminerGerald M. Forlenza Assistant Examiner-Richard A. Bertsch Attorney, Agent, or FirmGeorge Gottlieb .et a].
57 ABSTRACT This cast steel crossing with movable point is characterized in that the heel portion of the point is clamped on a triangular boss projecting from the crossing proper on which it can swing from one position to the other position, and that a horizontal key having a partspherical central portion is provided for holding said heel portion of the point on said crossing boss, in order to eliminate the so-called gap section in the central portion of the crossing and therefore avoidthe abnormal stress heretofore exertedon the wheel tires on account of the insufficient rolling surface of convention'al crossings.
6 Claims, 8 Drawing Figures PATENTEU M52219 3. 787. 680
SHEET 1 BF 2 N m v D rrl. lll
PATENIEU JAN 2 2 I374 SHEET 2 BF 2 CAST STEEL RAILWAY CROSSING FIELD OF THE INVENTION The present invention relates in general to railway crossings and has specific reference to cast steel crossings of this character.
BACKGROUND OF THE INVENTION A trend towards higher railway speeds leads to the elimination from the central portion of these crossings of the so-called gap section in which shocks occur and wherein. the wheel tyres are exposed to abnormal stress due to the momentary insufficiency of the rolling surface in the track. In conventional crossings this central section is subjected to severe wear and tear, causing damages both expensive and extremely delicate to repair. In contrast thereto, the crossing incorporating a movable point provides a continuous rolling surface, eliminates detrimental shocks and has a considerably longer useful life while reducing maintenance costs.
Hitherto known solutions to this specific problem consisted in either pivoting the point to a vertical pin or using a flexible point; however, service tests proved that this method is unsatisfactory due to the fragility of the assembly.
SUMMARY OF THE INVENTION To avoid these inconveniences, the present invention provides an improved railway cast steel crossing of the movable point type, characterized in that the heel portion of the point is fork-shaped and fits on either side of a triangular boss or projection of the crossing so that it can swing from one to the other position, and that a horizontal key having a part-spherical central portion is adapted to hold said heel portion of the point on said boss.
The heel portion of the point comprises to this. end a vertical V-shaped end notch forming two lateral wings disposed with a slight clearance on either side of said triangular boss of the crossing, the latter, also of elongate configuration, comprising a slightly swollen portion in the .key area about which the point can swivel between'its two positions.
BRIEF DESCRIPTION OF THE DRAWING Other features characterizing the cast steel railway crossing of this invention will appear as the following description proceeds with reference to the accompanying drawing, in which a typical form of embodiment of this crossing is illustrated diagrammatically by way of example, not of limitation. In the drawing:
FIG. I is a plan view from above of the crossing according to this invention;
FIG. 2 is a longitudinal section taken substantially along the line IIIl of FIG. 1;
FIG. 3 is an end view of one of the sides of this cross- FIGS. 4 to 6 are cross sections taken on a larger scale along the lines IV-IV, V-V and VIVI respectively of FIG. 1;
FIG. 7 is an end view of the other end of the crossing;
FIG. 8 is a part-sectional and fragmentary plan view showing on a larger scale a datail of the crossing.
DESCRIPTION OF THE PREFERRED EMBODIMENT The cast steel railway crossing l illustrated in the drawing and designed according to the present invention is characterized in that its movable point 2 is adapted to swing from one position to its other position on a triangular boss 3 without using any vertical pivot pin, shaft or the like.
To this end, the heel portion of the point has formed therein a V-shaped elongated vertical notch forming two wings 4, 5 fitting with a slight clearance on either side of said triangular boss 3 also of elongated configuration; a horizontal key 6 having a part-spherical central portion 7 holds the two wings 4, 5 on the boss 3.
This boss 3 comprises in the key area a slightly swollen portion 8 about which the point is adapted to swing from one position to the other position.
The rear ends of the point wings 4, 5 are bevelled in order to engage in each position of said point with the likewise bevelled ends respectively of the pair of upstream rails 11 and 12, in order to avoid any break of continuity along one or the other rolling lines of the crossing.
The movable point 2 is carried by wear and friction plates 13, preferably in the form of inserts secured by welding to the crossing base plate and consisting advantageously of manganese steel.
The two downstream rails of the crossing are each provided with a cavity 16, 17 aligned with a corresponding cavity 18 formed in the point,in the vicinity of its front end, to permit the passage of a bar for guiding the movements of said point and adapted to be controlled or driven from a power unit through a wormand-gear mechanism or any other sufficiently reliable mechanism.
The movable-point cast steel crossing according to this invention is also advantageous in that it comprises two separate portions, i.e. the crossing proper and the point, so that each portion can be made from the material best suited to its specific function. Thus, the crossing may be made from a steel having the same density as the rails associated therewith, thus permitting an easy assembling by welding and eliminating fish-plates; and the point may be-cast from high-grade steel in order to improve its strength under different stresses; moreover, the replacement of the point is extremely easy due to its fitting in the crossing with the assistance of a cross key.
Of course, many modifications may be brought to the specific form of embodiment described hereinabove with reference to the attached drawing, without departing from the basic principle of the invention as set forth in the appended claims.
What is claimed is:
1. Cast steel railway crossing with movable point,
characterized in that the heel portion of the point is crossing, said crossing proper being likewise of elongated configuration and provided with a slightly swollen portion in the key area about which the point can swing from one position to the other position.
3. Cast steel railway crossing withmovable point according to claim 2, characterized in that said triangular boss of said crossing comprises in the key area a slightly swollen portion about which the'point can swing from one position to the other position.
4. Cast steel railway crossing with movable point according to claim 2, characterized in that the rear ends of the two wings of said'point are bevelled for coacting with the likewise bevelled ends of the pair of upstream rails in each point positioned respectively, in order to avoid any break of continuity along one or the other running lines of the crossing.
- stream rails of the crossing are each formed with a cavity aligned with another cavity formed in said point in the vicinity of its front end, to permit the passage of a bar for guiding the movements of said point, said bar being driven from a power unit of the worm-and-gear type or of any other suitable type having a sufficient reliability.

Claims (6)

1. Cast steel railway crossing with movable point, characterized in that the heel portion of the point is clamped on a triangular boss of the crossing on which it can swing from one position to the other position, and that a horizontal key, of which the central portion is of part-spherical configuration, is provided for holding said heel portion of the point on said crossing boss.
2. Cast steel railway crossing with movable point according to claim 1, characterized in that the heel portion of the point has an elongated V-shaped vertical notch formed therein to provide two side wings fitting with a slight clearance on said triangular boss of the crossing, said crossing proper being likewise of elongated configuration and provided with a slightly swollen portion in the key area about which the point can swing from one position to the other position.
3. Cast steel railway crossing with movable point according to claim 2, characterized in that said triangular boss of said crossing comprises in the key area a slightly swollen portion about which the point can swing from one position to the other position.
4. Cast steel railway crossing with movable point according to claim 2, characterized in that the rear ends of the two wings of said point are bevelled for coacting with the likewise bevelled ends Of the pair of upstream rails in each point positioned respectively, in order to avoid any break of continuity along one or the other running lines of the crossing.
5. Cast steel railway crossing the movable point according to claim 2, characterized in that the movable point is carried by wearing and friction plates preferably of the insert type secured by welding to the crossing base plate and consisting advantageously of manganese steel.
6. Cast steel railway crossing with movable point according to claim 2, characterized in that the two downstream rails of the crossing are each formed with a cavity aligned with another cavity formed in said point in the vicinity of its front end, to permit the passage of a bar for guiding the movements of said point, said bar being driven from a power unit of the worm-and-gear type or of any other suitable type having a sufficient reliability.
US00263700A 1971-06-21 1972-06-16 Cast steel railway crossing Expired - Lifetime US3787680A (en)

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FR717122452A FR2142574B1 (en) 1971-06-21 1971-06-21

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AT (1) AT319990B (en)
BE (1) BE784169A (en)
BR (1) BR7204003D0 (en)
CA (1) CA976520A (en)
CH (1) CH553290A (en)
DE (1) DE2229025C3 (en)
ES (1) ES404485A1 (en)
FR (1) FR2142574B1 (en)
GB (1) GB1368894A (en)
IT (1) IT960424B (en)
LU (1) LU65541A1 (en)
NL (1) NL7208400A (en)
NO (1) NO133111C (en)
SE (1) SE370557B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5184791A (en) * 1990-05-04 1993-02-09 Bwg Butzbacher Weichenbau Gmba Frog tip that can be shifted relative to the wing rails
US5393019A (en) * 1993-05-04 1995-02-28 Ortiz-Rivas; Arturo A. Railroad turnout frog with continuous running surface
US5618013A (en) * 1995-08-10 1997-04-08 Cogifer- Compagnie Generale D'installations Ferroviaires (Societe Anonyme A Directoire) Movable point for a crossing frog for railway apparatus of very great length, incorporated in long welded rails
WO1997041305A1 (en) * 1996-04-29 1997-11-06 Jez Sistemas Ferroviarios, S.L. Acute crossing of railway tongue
EP1538264A3 (en) * 2003-12-02 2006-11-15 BWG GmbH & Co. KG Railway frog

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3709126A1 (en) * 1987-03-23 1988-10-13 Butzbacher Weichenbau Gmbh Interacting track parts
DE3904026A1 (en) * 1989-02-10 1990-08-16 Magna Holding Anstalt SLIDING INSERT FOR CLOSED TONGUE DEVICES AND SLIDING SURFACES FOR MOVABLE HEART TIP TIPS, AND METHOD FOR FASTENING SUCH A SLIDING INSERT TO THE SLIDING BED OF ROLLER RAIL LOCKING DEVICES
DE19607588A1 (en) * 1996-02-29 1997-09-04 Butzbacher Weichenbau Gmbh Arrangement for holding down a centerpiece tip
DE19616343A1 (en) * 1996-04-24 1997-10-30 Butzbacher Weichenbau Gmbh Rail-crossing dog with movable intermediate component
ES2399735B1 (en) * 2010-06-15 2013-11-13 Jez Sistemas Ferroviarios, S.L. ACUTE HEART OF MOBILE POINT FOR DEVICES OF VIA DE CARRIL GARGANTA
ES2485240B2 (en) * 2013-02-08 2015-05-19 Talleres Alegría S.A. Support cradle for railroad bypass devices

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US175699A (en) * 1876-04-04 Improvement in railroad-switches
US3099427A (en) * 1958-02-07 1963-07-30 Gen Signal Corp Railway switch point bearings
US3403251A (en) * 1966-12-30 1968-09-24 Retorno 30 De Cecilio Robe 10 Track turnout for two rail model electric railroads
US3518423A (en) * 1967-02-17 1970-06-30 Oesterr Alpine Montan Crossing frogs for railway points

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US175699A (en) * 1876-04-04 Improvement in railroad-switches
US3099427A (en) * 1958-02-07 1963-07-30 Gen Signal Corp Railway switch point bearings
US3403251A (en) * 1966-12-30 1968-09-24 Retorno 30 De Cecilio Robe 10 Track turnout for two rail model electric railroads
US3518423A (en) * 1967-02-17 1970-06-30 Oesterr Alpine Montan Crossing frogs for railway points

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5184791A (en) * 1990-05-04 1993-02-09 Bwg Butzbacher Weichenbau Gmba Frog tip that can be shifted relative to the wing rails
US5393019A (en) * 1993-05-04 1995-02-28 Ortiz-Rivas; Arturo A. Railroad turnout frog with continuous running surface
US5618013A (en) * 1995-08-10 1997-04-08 Cogifer- Compagnie Generale D'installations Ferroviaires (Societe Anonyme A Directoire) Movable point for a crossing frog for railway apparatus of very great length, incorporated in long welded rails
WO1997041305A1 (en) * 1996-04-29 1997-11-06 Jez Sistemas Ferroviarios, S.L. Acute crossing of railway tongue
ES2137807A1 (en) * 1996-04-29 1999-12-16 Jez Sistemas Ferroviarios S L Acute crossing of railway tongue
EP1538264A3 (en) * 2003-12-02 2006-11-15 BWG GmbH & Co. KG Railway frog

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AT319990B (en) 1975-01-27
DE2229025B2 (en) 1974-09-05
BR7204003D0 (en) 1973-06-21
NL7208400A (en) 1972-12-27
CA976520A (en) 1975-10-21
NO133111C (en) 1976-03-10
IT960424B (en) 1973-11-20
NO133111B (en) 1975-12-01
FR2142574A1 (en) 1973-02-02
FR2142574B1 (en) 1973-05-25
ES404485A1 (en) 1975-06-01
CH553290A (en) 1974-08-30
DE2229025A1 (en) 1972-12-28
GB1368894A (en) 1974-10-02
SE370557B (en) 1974-10-21
LU65541A1 (en) 1972-10-25
BE784169A (en) 1972-09-18
DE2229025C3 (en) 1975-04-30

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