US3038332A - Vehicles for the testing of railway tracks - Google Patents

Vehicles for the testing of railway tracks Download PDF

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Publication number
US3038332A
US3038332A US741144A US74114458A US3038332A US 3038332 A US3038332 A US 3038332A US 741144 A US741144 A US 741144A US 74114458 A US74114458 A US 74114458A US 3038332 A US3038332 A US 3038332A
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United States
Prior art keywords
rail
points
point
track
loaded
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Expired - Lifetime
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US741144A
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English (en)
Inventor
Grossmann Paul
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.)
Matisa Materiel Industriel SA
Materiel Industriel SA
Constructions Mecaniques SA
Original Assignee
Matisa Materiel Industriel SA
Constructions Mecaniques SA
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Publication date
Application filed by Matisa Materiel Industriel SA, Constructions Mecaniques SA filed Critical Matisa Materiel Industriel SA
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Publication of US3038332A publication Critical patent/US3038332A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
    • B61K9/08—Measuring installations for surveying permanent way

Definitions

  • the supervision of the condition of railway tracks comprises, in particular, the control of the regularity of the lengthwise profile of each rail line, that is to say the regularity of the longitudinal levelling in a substantially vertical plane.
  • the said deformation may be considered as elastic, because it practically disappears with a load and the rail then recovers its initial level.
  • the area ailected by the loaded axle generally extends over several meters.
  • the elasticity of the rail allows it to recover its initial level after each passage.
  • the rail gives way beyond its elastic limit and there then remain a permanent deformation which increases at each fresh passage of a loaded axle.
  • the characteristic of the fault implies a reconditioning of the track according to very different methods.
  • a plain normal tamping sufiices to correct dancing sleepers such is not the case to eliminate any permanent deformation of the rail, which cannot be done on the spot.
  • the correct straightening of a deformed rail is a very delicate operation which, if it is not carried out with all the required care, leaves 1'11 the steel extremely dangerous stresses. Consequently, one cannot content oneself with an ordinary cold straightening.
  • the invention contemplates that the only practical approach is to cause to circulate an appropriate vehicle thereon.
  • the exception of light apparatus, which practically does not deform the track, and which is of no interest to the present invention there are known vehicles which permit of measuring and recording the irregularitie in the lengthwise profile, but however without rendering possible a discrimination between the two mentioned types of levelling faults. This arises from the fact that all of the said vehicles make use of a system of vertical measurements based either on several axles all loaded, or on a relatively light feeling device, arranged between bearing axles, so that all the vertical guide marks are thus in the zone of the track deformed by the highly loaded axles.
  • the present invention provides a vehicle for the test ing of railway tracks, in the vertical plane, comprising for each rail, a measuring device effective from at least two loaded measuring points and at least one non-loaded measuring point, and further provides relative vertical movements of the said points during the movement of the vehicle on the track, the non-loaded point being situated beyond the one or more straight segments determined by the said loaded points and being in contact with the rail, and being at a distance of at least two meters from the said loaded points.
  • the drawing shows, by way of example, one embodiment of the vehicle according to the invention and explanatory diagrams.
  • FIGURES l to 10 are explanatory diagrams.
  • FIGURE 11 is a diagrammatical view of the said embodiment.
  • FIGURE 12 is an explanatory diagram corresponding to FIG. 11.
  • the vehicle shown permits the testing of a railway track by means of only three measuring points for each of the rail lines, the vehicle being fitted to produce one load on two of the measuring points.
  • FIGURE 1 shows diagrammatically, in side view, an
  • unloaded point I placed outside two loaded points 2 and 3 which produce on one of the rail lines 4 a vertical deformation 5-shown in a very exaggerated manner for purposes of clarity-the point 1 being, to simplify the description, completely outside the said deformed zone.
  • the angular divergence a or any geometrical size which is a function thereof (tangent, chord, etc.), may serve to measure the amount of the deformation relative to the nondeformed runway, the values of the loads at 2 and 3 being chosen at random such as, for example, equal to one another, and the distances D and B being also chosen arbitrarily.
  • a measuring device which may move along the track, while maintaining constant the loads 2 and 3 as well as the distances D and E between the guide points, thus permitting of noting easily, in a continuous manner, the variable value of the angular divergence along a line of the rails and, thus, of measuring or recording, and while distinguishing them, the irregularities of the lengthwise profile.
  • FIGURES 3, 4, and 5 show three typical successive positions of the measuring devicepassing from left to right in the drawingat right angles to a joint 6 where there exists an area of dancing sleepers, and FIGURE 6 shows diagrammatically the corresponding characteristic recording.
  • the unloaded point 1 advances wiwthout bending the rail to any appreciable extent until it is on the floating joint, as shown in FIG. 3. But, when the loaded point 2 nears the said joint, the rail is deformed elastically and there is observed an angular divergence which increases to a maximum a --for the position shown in FIG. 4--thus indicating the low point. Then, the movement continuing, the angle diminishes, passes through zero and increases in the other direction to an extreme a for the position shown in FIG. 5, and finally diminishes again to zero when the loaded point 3 leaves the perturbed zone.
  • a dancing sleeper joint but with nonpermanent deformations of the ends of the rails, will be inscribed for example on a recording by a signal formed by two successive recording points Y2 and Y3, but of different direction, such as drawn diagrammatically in FIG. 6.
  • the measuring device passes over a joint where there exists a permanent deformation of the ends of the rails (FIGS. 7 to the point 1, although not loaded, starts by indicating on the diagram a high point a (FIG. 7) followed as previously by low point a (FIG. 8) and high point a (FIG. 9), so that a permanent deformation is signalled, for example, by an inscription through three alternate points Y1, Y2, and Y3, such as diagrammatically drawn in FIG. 10.
  • the heights of the signal points may be made proportional to the intensity of the fault noted, so that the inscriptions may serve to measure effectively the said intensity.
  • the shape of the inscription curves may furnish additional information regarding the kind of irregularities in the lengthwise profile.
  • very sharp inscription points show a sudden variation of the runway which indicates turned back edge at a joint, whereas a junction 4 gradient, for example, is indicated by an undulated inscription.
  • FIGURE 11 shows, diagrammatically, an embodiment of the invention.
  • the latter comprises an unloaded measuring point 1, disposed ahead of and at least at a distance of two meters from two loaded measuring points 2 and 3 which are the two loaded points of one of the lines 4 of the rails.
  • an unloaded measuring point 1 disposed ahead of and at least at a distance of two meters from two loaded measuring points 2 and 3 which are the two loaded points of one of the lines 4 of the rails.
  • a rail is accordingly loaded as shown by arrows F1 and F2 through the agency of forks 10 and 10a, a first chassis inelastically supported, which itself supports, through elastic elements 12 and 12a, 21 second suspended chassis.
  • the vehicle pushes before itaccording to the accepted direction of displacement, by means of a system of rods 14, hinged in all directions, a chariot 15 of very light construction, with an axle 16 the wheel 17 of which substantially does not deform the rail at the unloaded measuring point 1.
  • the chariot 15 Since the chariot 15 is not suspended elastically on the track, its upper edge 18 is at a fixed distance from the axis of the wheel and thus constitutes a secondary measuring basis on which constantly bears a horizontal lever 19, pivoting at Zn on the non-suspended chassis ll, so as to remain in the plane of the rail line.
  • a cable 22 of a sheathed transmission or Bowden cable 23 which rises vertically from a point of support 24 on the nonsuspended chassis 11 and ends against a casing 25 of a band recorder 26, of known type, having a stylus 27 which is actuated by the cable 22 held taut by a spring 28 to eliminate looseness.
  • the band 26 is unrolled by means of a very simple transmission, not shown, dependent on the travel of the vehicle on the track.
  • This arrangement permits of transmitting integrally to the recorder secured to the suspended chassis 13 the movements of the end 21 of the lever in relative to the support point of the non-suspended chassis 11.
  • FIG. 12 shows, by way of example, the graphic calculation of the value Y of the inscription point corresponding to a lowering X of one of the measuring points.
  • a vehicle for testing a rail for vertical deformations therein and capable of distinguishing permanent and temporary deformations said vehicle comprising first rneans defining two spaced measuring points rigidly connected together for loading said rail, second means connected with said first means and vertically displaceable with respect thereto, said second means contacting said rail without load at a point outside the zone between said first points, said point being sufiiciently remote from the first points that the rail at said point is undeflected by the loading means, and third means to indicate the displacement of the second means with respect to the first means with said rail being traversed by said vehicle.
  • a vehicle for testing a railway track which includes rails and sleepers, said vehicle including means for distinctively detecting permanent vertical deformations and elastic vertical deflections of the rails under load, said vehicle comprising first and second means responsive to the relative vertical position of a pair of longitudinally spaced points on the same rail, means for loading the rail in the vicinity of the said pair of points suificiently to deflect the said rail Where the sleepers supporting the rail are floating, third means responsive to the position of a third point on the said same rail relative to the position of the said pair of points, said third point being sufficiently remote from the said pair of points that the rail at said third point is substantially undefiected by the loading means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
US741144A 1957-06-17 1958-06-10 Vehicles for the testing of railway tracks Expired - Lifetime US3038332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH3038332X 1957-06-17

Publications (1)

Publication Number Publication Date
US3038332A true US3038332A (en) 1962-06-12

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Application Number Title Priority Date Filing Date
US741144A Expired - Lifetime US3038332A (en) 1957-06-17 1958-06-10 Vehicles for the testing of railway tracks

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US (1) US3038332A (fr)
CH (1) CH340852A (fr)
DE (1) DE1098532B (fr)
FR (1) FR1208468A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5107598A (en) * 1990-09-04 1992-04-28 Woznow Leon J Surface profiler
WO2002010682A1 (fr) * 2000-08-01 2002-02-07 Sunway Co., Ltd. Procede pour mesurer le profil longitudinal de la surface d'une chaussee
US6588114B1 (en) * 2000-07-07 2003-07-08 Michael Daigle Measuring pump device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT313344B (de) * 1970-07-02 1974-02-11 Plasser Bahnbaumasch Franz Fahrbare Einrichtung zur Feststellung der Höhenlage bzw. des Zustandes eines Gleises
AT332441B (de) * 1972-08-03 1976-09-27 Plasser Bahnbaumasch Franz Fahrbare einrichtung zur feststellung der hohenlage bzw. des zustandes eines gleises
AT323789B (de) * 1972-08-03 1975-07-25 Plasser Bahnbaumasch Franz Fahrbare einrichtung zur feststellung der höhenlage bzw. des zustandes eines gleises
FR2392169B1 (fr) * 1977-05-23 1985-10-04 Fourcade Jean Dispositif de mesure des defauts du nivellement et du dressage des voies ferrees
US4288926A (en) * 1979-11-02 1981-09-15 The United States Of America As Represented By The Secretary Of Transportation Longitudinal rail profilometer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1667246A (en) * 1924-11-17 1928-04-24 Dreyer Hans Railway-track inspection apparatus
US1837633A (en) * 1928-10-12 1931-12-22 Sperry Prod Inc Roadway inspecting means
US2136913A (en) * 1934-06-26 1938-11-15 Sperry Prod Inc Roadway inspecting means
FR1068487A (fr) * 1952-09-02 1954-06-25 Meer Ag Maschf Appareil de mesure pour machine destinée au bourrage des traverses de voies

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE99520C (fr) *
DE463272C (de) * 1924-11-18 1928-07-26 Hans Dreyer Dr Ing Vorrichtung zur staendigen, selbsttaetigen UEberwachung des Eisenbahngleises unter den fahrenden Zuegen
DE825427C (de) * 1950-12-10 1951-12-17 Deutshe Bundesbahn Vertreten D Gleismessdraisine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1667246A (en) * 1924-11-17 1928-04-24 Dreyer Hans Railway-track inspection apparatus
US1837633A (en) * 1928-10-12 1931-12-22 Sperry Prod Inc Roadway inspecting means
US2136913A (en) * 1934-06-26 1938-11-15 Sperry Prod Inc Roadway inspecting means
FR1068487A (fr) * 1952-09-02 1954-06-25 Meer Ag Maschf Appareil de mesure pour machine destinée au bourrage des traverses de voies

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5107598A (en) * 1990-09-04 1992-04-28 Woznow Leon J Surface profiler
US6588114B1 (en) * 2000-07-07 2003-07-08 Michael Daigle Measuring pump device
WO2002010682A1 (fr) * 2000-08-01 2002-02-07 Sunway Co., Ltd. Procede pour mesurer le profil longitudinal de la surface d'une chaussee
US6647636B2 (en) 2000-08-01 2003-11-18 Sunway Co., Ltd. Method for measuring road surface longitudinal profile

Also Published As

Publication number Publication date
DE1098532B (de) 1961-02-02
CH340852A (fr) 1959-09-15
FR1208468A (fr) 1960-02-24

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