US2976816A - Mobile railway ballast tamping machine - Google Patents

Mobile railway ballast tamping machine Download PDF

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Publication number
US2976816A
US2976816A US746980A US74698058A US2976816A US 2976816 A US2976816 A US 2976816A US 746980 A US746980 A US 746980A US 74698058 A US74698058 A US 74698058A US 2976816 A US2976816 A US 2976816A
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tamping
tie
machine
lever
brake
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US746980A
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English (en)
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Plasser Franz
Theurer Josef
Schramm Gerhard
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PLASSER AND THEURER
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PLASSER AND THEURER
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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
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
    • E01B27/13—Packing sleepers, with or without concurrent work on the track
    • E01B27/16—Sleeper-tamping machines

Definitions

  • the present invention relates to ballast tamping machines mounted on cars adapted to travel along a railroad track whose rails are arranged on spaced ties.
  • the intermittent stoppage of the forwardly moving machine at each tie is automatically controlled by tieprobing means mounted on the machine and responsive to contact with each tie or tie element in the same vertical plane as the tie.
  • the stoppage control means is operatively connected to means for actuating a brake as well as a clutch in the chassis, the clutch being arranged between the drive means and the wheels of the chassis.
  • the tie-probing means is mounted on the chassis centrally between the pairs of tamping tools and comprises a mechanism for probing or contacting the upper sides of the ties, which tactile means is arranged to control the brake actuating means.
  • the tactile means may be pivotal feeler elements, rollers, gliding plungers or the like.
  • the tactile elements have a tactile or tie-probing surface which is downwardly convexly curved. They may be supported on vertically glidable rods.
  • an additional tactile element is mounted independently and centrally of the two tactile elements linked to the scalebeam, the additional tactile element being mounted in a vertical bearing and being biased downwardly, a stop being provided to limit the downward movement of the additional tactile element.
  • the tieprobing means is arranged to actuate a switch which controls a circuit for the electrical control of the brake actuation means.
  • a lever element pivoted at its upper end on the chassis and having its lower end reach within the range of the ties so that it will engage the tie, or a part connected therewith, when the lever pivot is above the tie.
  • This abutment for the pivotal lever may be, for instance, the head of the bolts serving to mount the rail on the ties.
  • the length of the brake path i.e. the time lag between application of the brakes and standstill of the tamping machine truck, depends not only on the speed of the vehicle but also on the grade of the path. It is, therefore, preferred to mount the pivot of the control lever on a slide which is longitudinally adjustably arranged in the chassis so that the distance between the pivotal lever and the central axis of the tamping machine may be adjusted. This distance may be empirically changed without difiiculty so that, in each instance, the tamping machine truck will stop in such a position that the tamp- 3 ing tools will be accurately aligned with the tie to be tamped.
  • Mechanical transmission means may be provided to transmit the pivoting movement of the control lever to linkage means which actuates the clutch and the. brakes in the chassis, the engagement of the lower end of the lever with a tie, or part thereof, causing its back movement about its pivot and subsequent actuation of the brake and disengagement of the clutch.
  • the tamping machine truck After tamping of the tie and raising of the tamping tool carrier, the tamping machine truck must be moved forwardly to the next tie for another tamp-ing operation. This movement may be effected by an operator. However, in accordance with another preferred embodiment of this invention, the forward movement of the truck is also effected automatically. For this purpose, we have provided a device on the machine frame which automatically engages the clutch and disengages the brakes upon raising of the tamping tool carrier.
  • the brake and clutch actuation is eifected by pressure fluid means and the fluid supply is controlled by an electromaguetically operated valve.
  • all forward movement control elements of the machine including the control element responsive to the upward movement of the tamping tool carrier, the tactile or tie-probing elements and the actuating means for the brake and clutch are connected to a common electrical circuit and thus cooperate without any mechanical connecting means.
  • Fig. 1 is a side view of a tamping machine of conventional type, the essential details of the drive controls of the machine according to the invention being schematically shown;
  • Fig. 2 illustrates the drive control means in detail, together with the control circuit
  • Fig. 3 is a side view, partly in section, of the tieprobing or tactile elements
  • Fig. 4 is a transverse section of the tie-probing or tactile elements
  • Fig. 5 is a schematic side view of a tamping machine embodying another drive control.
  • Figs. 6 and 7 are side views of the bell crank lever device of Fig. 5 for automatically moving the truck forwardly upon raising of the tamping tool carrier.
  • the chassis of the machine comprises frame 1 which is freely suspended above the track portion to be tamped, motor 2 being mounted at the rear end of the truck to form a counterweight.
  • This machine is of the type wherein each of a pair of tamping tool carriers 3 and 3 is vertically adjustably mounted above respective ones of the pair of rails on two columns or support posts 23, the tamping tools 26 being linked to the ends of arms which are vibrated by eccentric shaft 24.
  • Tamping tool carrier 3' is invisibiy behind carrier 3 in the side view of Fig. l but is schematically indicated in Fig. 2.
  • the tamping tools are connected at pivots 27 to means (not shown) for moving the tools relatively to each other.
  • the shaft of motor 2 is connected by shaft 4 with gear drive 5 which is connected with the drive wheels 22 by means of universally mounted shaft 6.
  • Clutch 7 is mounted between the gear drive 5 and Wheels 22, being actuatable by means of lever 7
  • Forward wheels 22' are provided with brake 8 of conventional type, which is actuatable by lever 8;
  • the tactile or tie-probing elements of the invention form an aggregate 9 mounted on frame 1 between the pairs of tamping tools 26.
  • this aggregate may be vertically adjustable in the frame to enable the machine to be used with dilferent track heights and also to adjust the tactile element position in dependence of the distance of the upper side of ties 19 from the lower edge of the machine frame.
  • Fig. 1 also shows the stop 10 on the vertically adjustable tamping tool carrier 3, which cooperates with the two-armed lever 1?. on frame 1 in a manner described hereinafter.
  • a compressor 12 delivers compressed air through conduits 13 and 14 to electromagnetically controlled valves 15 and 16, respectively, which regulate the fluid supply to cylinders 17 and 18, respectively.
  • Pistons 17' and 18' respectively, move in cylinders 17 and 18, being biased by return springs 17", 18".
  • Piston 17' has its piston rod 7 linked to lever '7' to actuate clutch 7 while brake 8 is actuated by lever 8 linked to piston rod 8" of piston 18'.
  • the tamping machine moves on tracks 20 mounted on ties 19.
  • Fig. 2 there is shown the cooperation of the diiferent control means in response to the movement of the tamping tool carriers 3, 3, on the one hand, and the position of the tie-probing elements in relation to tie 19, on the other hand.
  • a separate vertically adjustable ta-rnping tool carrier 3, 3' is provided for each rail of the tracks 20, each tamping tool carrier supporting at least two and often four pairs of cooperating tamping tools 26.
  • Fig. 2 shows the separate tamping tool carriers 3 and 3 adjacent one another while the side view of Fig. 1 shows, of course, only one of the carriers.
  • tamping tool carrier 3 (farther left in Fig. 2. than carrier 3), has mounted thereon the stop 10 which is arranged to cooperate with lever 11 of the drive control element which is fixedly mounted on the machine frame. Stop 10 can engage lever 11 only during the upward movement of tamping tool carrier 3. This is accomplished by mounting the stop member pivotally so that it may be swung back against the pressure of spring leaf 36 during the downward movement of the carrier.
  • Two-armed lever 11 is biased by return spring 28 whose lower end is fixed to lug 29.
  • the opposite end of the lever is linked to piston rod 30 of piston 32.
  • Rod 30 constitutes a sliding or slip contact member between the two illustrated terminals and has an insulated spot 31 which interrupts the current between the two terminals as soon as the piston has reached its uppermost position.
  • Piston 32 glides in cylinder 33 and divides it into two chambers which communicate with each other by means of conduits 34 and 35'.
  • a check or back-pressure valve 34 of known type is mounted in conduit 34' while an adjustable throttle or butterfly valve 35 is mounted in conduit 35'.
  • back-pressure valve 34 closes automatically and the pressure fluid must flow back from the upper to the lower cylinder chamber through butterfly valve 35 and conduit 35. Adjust of the throttle valve 35. In the uppermost position of rod 30, the circuit is interrupted because the insulated area 31 of rod 38 will be located between the terminals.
  • this control element constitutes a pressure fluid operated timing switch.
  • any other suitable timing switch may be used in the arrangement with equivalent results.
  • a snap or quick-action switch 37 conventionally actuated by a tactile element, such as roller 39, is associated with the other tamping tool carrier 3 (extreme right of Fig. 2).
  • the switch comprises a gliding member 38 biased by pressure spring 38 and having linked thereto two contact springs 30 which are held by spring 40" in contact-making or contact-interrupting position, depending on the position of gliding member 38.
  • the current source for the electrical control circuit for instance a storage battery, is shown at 41.
  • the current source is connected to electromagnet 42 of valve 15 which is mounted in pressure fluid conduit 13 which leads to cylinder 17 of the clutch actuating means.
  • electromagnet 42 When electromagnet 42 is deenergized, piston 15' of valve 15 is biased by tension spring 44 which pulls the piston to the right, as seen in Fig. 2, to establish communication between conduit 13 and cylinder 17 while closing ofi conduit 13'.
  • piston 15 is pulled into the position illustrated in the drawing, i.e. it closes conduit 13 which is connected to compressor 12 and connects the interior of cylinder 17 to conduit 13' which leads from cylinder 15 to the atmosphere.
  • compression spring 17" will press piston 17 and lever 7 into illustrated position I where the clutch is in operative position.
  • the control of the brake actuation means is identical with the above-described clutch actuation.
  • the electromagnet 43 of valve 16 is also connected to the current source 41, the valve being mounted in pressure fluid conduit 14 which leads to cylinder 18 of the brake actuating means.
  • piston 16' of valve 16 is biased by tension spring 45 which pulls the piston to the right, as seen in Fig. 2, and establishes communication between conduit 14 and cylinder 18 while closing off conduit 14'.
  • piston 16' of valve 16 is pulled into the position illustrated in the drawing, i.e. it closes conduit 14, which is connected to compressor 12 and connects the interior of cylinder 18 to conduit 14' which leads from cylinder 16 to the atmosphere.
  • compression spring 18" will press piston 18' and lever 8 into illustrated position I where the brake 8 is inoperative.
  • An electromagnetic switch 46 is provided in one of the current conductors for electromagnet 43 of brake valve 16.
  • the switch 46 is controlled by electromagnet 47 which is biased by tension spring 48 tending to keep the switch 'open. 47 is actuated.
  • Switch 49 which is generally similar to switch 37, is provided in another current conducting line for electromagnet 43 of brake valve 16. This switch comprises a gliding member 50 and contact springs 51. The tactile element 52 of switch 49 is actuated by the tactile element 55 which probes the upper side of tie 19 and moves vertically in bearing 56.
  • the switch is closed when electromagnet
  • the time required therefor may be regulated by 6 probing elements 60, 60.
  • the switch comprises an atom ate contact bar 59 and a brush or wiper 57.
  • the pivotal wiper 57 is fixedly mounted in the fulcrum of scalebeam 58.
  • Support rods carrying tie-probing elements 60, 60 are vertically glidably mounted in bearings 61, 61', being linked to the ends of the scale beam at 58', 58''.
  • the fulcrum of the scalebeam is mounted on a vertically movable rod which is journaled in bearing 66.
  • the free end of the wiper 57 cooperates with contact bar 59 which is interrupted in the middle.
  • the switch which consists of the wiper and the bar and which is actuated by the swinging movement of scalebeam 58, interrupts the circuit when the scalebeam is in horizontal position while it closes the circuit to the brake actuating means in any position of the scalebeam deviating from the horizontal.
  • Figs. 3 and 4 illustrate the details of the tie-probing elements.
  • the tactile elements 60, 60 are shown to have downwardly convexly curved tie contact surfaces and are mounted on rods journaled in vertical bearings 61, 61' with considerable play.
  • the play with which the rods are mounted in the bearings must be suflicient to permit the scalebeam 58 to oscillate about its fulcrum.
  • the pivots 58 and '58" may be constituted by longitudinal slots to permit the swinging movement of the scalebeam.
  • Tie-probing element 55 is mounted centrally of elements 60, 60.
  • the central tactile element 55 is independent of scalebeam 58 and is carried by a rod which is journaled in vertical bearing 56.
  • the fulcrum 62 of beam 58 is carried by rod 65 which is journaled in vertical bearing 66.
  • Compression spring 63 is biased to press fulcrum 62 downwardly, the downward movement being limited by stop 67 mounted at the outer end of rod 65.
  • the position of pivotal beam 58 is also determined by springs 64 which tend to hold the beam in its horizontal position.
  • any suitable means could be used instead of springs 64 to maintain the beam in its horizontal position, for instance a torsion spring in the fulcrum 62.
  • the mounting of the central tie-probing element 55 is similar to the above-described mounting of the beam fulcrum. Element '55 is depressed by spring 69 which is mounted between shoulder 68 of rod 53 and bearing 54. The downward movement of rod 53 is also limited by a stop mounted at the outer end of rod 53 similarly to stop 67. This stop is arranged to engage tactile element 52 of switch 49, as hereinabove described in connection with Fig. 2.
  • tie-probing elements 60, 60 are positioned in the center of the tracks one behind the other while the tie-probing element 55 is laterally offset. All tie-probing elements are relatively narrow in the direction transverse to the tracks.
  • the entire aggregate 9 of tie-probing elements is mounted in the frame 1 of the ballast tamping machine for vertical adjustment.
  • the tie contacting surfaces thereof make contact only with the upper side of the ties. Therefore, the height or thickness of the tie-probing plates themselves must not be too large to avoid disturbing contacts with the ballast between ties.
  • the plates must not be too thin so that the swinging movements of the pivotal beam 58 may be properly used for the drive control of the machine.
  • the distance from center to center of tie-probing elements 60, 60', as measured in the direction of the track, must correspond to the maximal width of ties to be tamped while the clearance between the probing surfaces of the tactile elements (also measured in the direction of the track) must be at least equal to the minimum width of the ties. In practice, therefore, the distance from center to center will be about 52 cm.
  • tieprobing elements need not be constructed in accordance with the illustrated embodiment. Rather, pivotal arms, gliding rollers and similar tactile means could be used with equivalent results.
  • the drive control mechanism of this embodiment operates as follows: 7
  • Fig. 2 illustrates the stage of operations when tamping of a tie 19 has been completed and the tamping tool carriers 3, 3 associated with each rail of track 20 have been lifted to withdraw the tamping tools 26 from the ballast (as shown in Fig. 1), the machine being about to be driven on to the next tie to be tamped.
  • switch 46 provides current to electromagnet 43. This will actuate valve 16 to cut off pressure fluid supply from conduit 14 to cylinder 18, the compression spring 18" will depress piston 18' and the brake 8 will become inoperative through movement of links 8 and 8'. With the clutch connected and the brake inoperative, the machine will move forwardly on the track.
  • the piston 32 of the time switch operated by tamping tool carrier 3 is automatically moved back to its starting position under the influence of spring 28.
  • the control circuit is interrupted because the insulated area 31 of piston rod 39 has moved into the range of the current collectors.
  • the coils of electromagnets 42 and 47 are cut off from further current supply, thus causing the clutch 7 to be disconnected and switch 46 to be opened under the bias of spring 48.
  • the tamping tool carriers 3 and 3' may now be lowered in a manner known per se (and which forms no part of the present invention) and the tamping operation may be completed about the tie.
  • the stop iii is so constructed that it has no eifect on lever 11 during the downward movement of the tamping tool carrier.
  • Switch 37 associated with the other tamping tool carrier also is temporarily open. Current for the control circuit connecting the clutch and disconnecting the brake can flow only when both tamping tool carriers have been lifted, as hereinabove explained. Therefore, the machine will remain stationary in the tamping position as long as the tamping tool carriers remained lowered.
  • the tie-probing means may also be a pivotal control lever 79 mounted at the forward end of the chassis 011 slide 70 which is adjustably mounted in bracket 71. Screw 72 permits the slide to be longitudinally moved in the bracket. Lever 79 engages piston 74 which is slidably arranged in hydraulic cylinder 73. Hydraulic conduit 76 leads from cylinder 73 to cylinder 86. A flexible tubing 75 forms part of conduit 76-to allow for the longitudinal adjustment of slide 70 which also carries cylinder 73.
  • a similar hydraulic cylinder 77 with slidable piston 78 is fixedly mounted directly on the frame and forms part of the brake release mechanism which is actuated by raising the tarnping tool carrier.
  • This mechanism is more clearly shown in Figs. 6 and 7 and comprises bell crank lever 79 pivoted on the frame. One end of the lever is actuated by piston 78, being limited in its movement by stop 80. The other end of the lever 79 is engageable by wedge-shaped stop 81 which is pivotably mounted on the vertically adjustable tamping tool carrier in lug 83. Pivotal stop 81 is biased by spring 82 against abutment 84.
  • Hydraulic conduit 85 leads from cylinder 77 to common hydraulic cylinder 86 which carries slidable piston 8'7. Piston 87 forms the final link of linkage system 88, 89, 90, 92 which actuates brake 8 and clutch 7. brake is actuated by schematically illustrated lever 8' and the clutch is actuated by link portion 92 and lever 7.
  • the intermittent forward movement of the mobile ballast tamping machine operates as follows:
  • the chassis advances to the next succeeding tamping position.
  • the lower end of control lever 79 hits head 84 of the bolt used for fixing the rail on the tie next succeeding to the tie to be tamped.
  • Further advance of the chassis will automatically pivot the lever backwardly, thus moving piston 74 to position I.
  • the hydraulic pressure fluid in conduits 75, 76 will transmit this movement to piston The 9 87 in cylinder 86, forcing the piston forwardly.
  • the forward movement of piston 87 will actuate linkage systom 88, 89, 90, 92 so that levers 8 and 7' will be brought into positions I and 1'', respectively.
  • the tamping tool carrier is lowered in the usual manner and the tamping operation is effected.
  • carrier 3 is raised, which causes wedge-shaped stop 31 to engage and pivot bell crank lever 79 so that piston 78 is moved forwardly in cylinder 77.
  • the hydraulic fiuid in conduit 85 will transmit this movement to piston 87 in cylinder 86, forcing both pistons back into position II. This movement will disengage brake 8 and engage clutch 7, thus causing forward movement of the truck until control lever 79 strikes the next tie, at which time the braking operation is repeated.
  • wedge-shaped stop 81 remains ineffective in respect of lever 79 because the stop is pivotally mounted in lug 83 and, therefore, resiliently yields under the action of spring 82 as it slides by lever 79.
  • control lever 79 may be exchangeable so that any desired shape of lever may be used for engagement with any portion or part of the tie or rail fixing means.
  • the lever is, of course, disconnected or removed entirely. It may be advantageous to mount a brush or like means ahead of the control lever to remove foreign bodies from the track, which may cause premature actuation of the lever.
  • the left chamber of cylinder 87 would be without pressure. It may be necessary, therefore, to provide safety devices in the linkage system or other suitable location to prevent premature reverse movement of the links.
  • safety devices may include stops, pneumatic control means and the like.
  • ballast tamping machine of claim 1 wherein said tie-probing means is a normally vertical lever having an upper end and a lower end, the upper end being pivotally mounted on the machine and the lower end being adapted to establish said contact in the vertical position of the lever, the mobility control means comprising a linkage system, and further comprising operating means for actuating the linkage system, said operating means being connected between the lever and a link of the linkage system, and being responsive to a pivoting movement of the lever, and another link of the linkage system operating the brake and clutch means when the lever pivots backwardly upon establishing said contact to stop the machine.
  • ballast tamping machine of claim 1 wherein said stop control means includes anelectrical control circuit connected to the mobility control means to operate the brake and clutch operating means, and switch means for opening and closing the circuit, the tie-probing means being mounted to actuate the switch means upon contact with said ties and any tie element in the same vertical plane as the tie.
  • the tie-probing means comprises a beam mounted on the machine in longitudinal direction in relation to the track for pivotal movement about its center, two tactile elements linked to the ends of the pivotal beam, support means for the pivot of the beams, vertical bearing means mounting the beam support means for vertical movement, and resilient means for maintaining the beam in horizontal position
  • the switch means comprises a switch consisting of a contact having one free end and another end fixedly mounted in the beam pivot, and an arcuate contact bar interrupted at its center to accommodate the free end of the contact, the circuit being open when the beam is in horizontal position and the free end of the contact is spaced from the contact bar and the circuit being closed in any other position of the beam when.
  • said driving means being mounted on the chassis, connecting means mounted between the driving means and the latter or driven wheels for operating said wheels, clutch means mounted in said connecting means for selectively disconnecting the driving means from the driven wheels, brake means mounted for stopping the wheels, mobility control means for effecting intermittent stopping of the wheels by operating the brake means to stop the wheels and disconnecting the driving means from the driven wheels by operating the clutch means, stop control means supported on the chassis for operative contact with said ties and operatively connected to the mobility control means for operating the mobility control means to operate the brake and clutch operating means to stop the tamping machine in a ballast tamping position upon operation of said stop control means, the stop control means including tie-prob -ing means mounted on the machine and responsive to contact with said ties and any tie element in the same vertical plane as the tie for the operation of said stop control means, forward movement control means for intermittently moving the tamping machine from one tamping position to the next tamping position, said latter control means being mounted on the frame adjacent the tamp
  • the forward movement control means comprises a bell crank lever pivotally mounted on the frame and an abutment mounted on the vertically adjustable tamping tool carrier, one arm of the bell crank lever being operatively connected to the mobility control means and the other arm of the lever being engageable by the abutment when the tamping tool carrier is raised sufiiciently to lift the tamping tools above the ties, engagement of the abutment with the other lever arm actuating the forward movement control means to release the brake means from said wheels and to connect the driving means to said wheels.
  • a mobile ballast tamping machine comprising dn'ving means, wheels adapted to travel along a railroad track which is mounted on spaced ties, means operatively connecting the driving means with the wheels, clutch means mounted in said connecting means for selectively disconnecting the driving means from the wheels, brake means mounted for stopping the wheels, mobility control means for eliecting intermittent stopping of the wheels by operating the brake means to stop the wheels and disconnecting the driving means from the driven wheels by operating the clutch means, a vertically movable carrier mounted on said machine and supporting at least one pair of cooperating tamping tools, and control means supported on said machine for operative contact with said ties and operatively connected to the mobility control means for operating the mobility control means to operate the brake and clutch operating means to stop the tamping machine in a ballast tamping position upon operation of said control means, said control means including an electric control circuit, tie-probing means mounted on the machine within the range of the tamping tools for making contact with the upper side of the ties for the operation of said control means,
  • the other switch means includes a switch comprising a pressure fluid operated piston, an electrically conductive piston rod connected to the piston and making gliding contact with terminal means in said circuit, a lever linked to the piston rod for movement thereof, a lever actuating element mounted on the vertically movable tamping tool carrier and arranged to move the lever upon upward movement of the carrier, spring means arranged and biased to move the piston in a direction opposite to the direction it is moved by the lever upon npwardmovement of the carrier, conduit means for conducting the pressure fluid from one side of the piston to the other side thereof, and an adjustablethrottle valve in said conduit means.
  • a switch comprising a pressure fluid operated piston, an electrically conductive piston rod connected to the piston and making gliding contact with terminal means in said circuit, a lever linked to the piston rod for movement thereof, a lever actuating element mounted on the vertically movable tamping tool carrier and arranged to move the lever upon upward movement of the carrier, spring means arranged and biased to move the piston in a direction

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
US746980A 1956-06-26 1958-07-07 Mobile railway ballast tamping machine Expired - Lifetime US2976816A (en)

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AT351993X 1956-06-26
AT280357X 1957-03-28
CH341522T 1957-05-15

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DE (1) DE1070661B (cs)
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GB (1) GB802795A (cs)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
US3127848A (en) * 1958-04-14 1964-04-07 Plasser Franz Mobile track tamping machine
US3135222A (en) * 1960-03-01 1964-06-02 D Angelo Alfonso Rail anchor placement machine
US3144837A (en) * 1961-03-21 1964-08-18 Roy C Patton Work apparatus for use on railroads and the like
US3146727A (en) * 1960-02-16 1964-09-01 Plasser Franz Automatic control device for track tamping machines
US3177813A (en) * 1960-09-09 1965-04-13 Stewart John Kenneth Railroad maintenance device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119346A (en) * 1960-01-11 1964-01-28 Jackson Vibrators Machine and apparatus for leveling and tamping railway rails and ties

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US2052943A (en) * 1933-08-26 1936-09-01 Schcuchzer Auguste Ballast tamping machine
US2208016A (en) * 1938-02-02 1940-07-16 Arthur W Cowles Means for automatically stopping vehicles at railroad crossings
US2233994A (en) * 1940-10-10 1941-03-04 Cook Fred Automatic hydraulic brake attachment
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US2433443A (en) * 1940-11-18 1947-12-30 Edge Stanley Howard Means for controlling clutch and brake mechanism of road and like vehicles
US2561169A (en) * 1948-05-21 1951-07-17 Monomelt Co Inc Automatic deith control for presses
US2766056A (en) * 1951-11-03 1956-10-09 Edwin B Hudson Wheel adhesion control for railway rolling stock
US2804185A (en) * 1953-06-17 1957-08-27 Matisa Materiel Ind Sa Gear-box for ballast tamper

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US878797A (en) * 1905-04-13 1908-02-11 Henry M Harding Telpher.
US1328635A (en) * 1916-09-18 1920-01-20 Koehring Machine Company Clutch and brake control mechanism
US1297680A (en) * 1918-02-25 1919-03-18 Edward Hanak Conveyer system.
US1415194A (en) * 1921-12-19 1922-05-09 Dighton A Robinson Tie-tamping machine
US2052943A (en) * 1933-08-26 1936-09-01 Schcuchzer Auguste Ballast tamping machine
US2208016A (en) * 1938-02-02 1940-07-16 Arthur W Cowles Means for automatically stopping vehicles at railroad crossings
US2233994A (en) * 1940-10-10 1941-03-04 Cook Fred Automatic hydraulic brake attachment
US2433443A (en) * 1940-11-18 1947-12-30 Edge Stanley Howard Means for controlling clutch and brake mechanism of road and like vehicles
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US2766056A (en) * 1951-11-03 1956-10-09 Edwin B Hudson Wheel adhesion control for railway rolling stock
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127848A (en) * 1958-04-14 1964-04-07 Plasser Franz Mobile track tamping machine
US3146727A (en) * 1960-02-16 1964-09-01 Plasser Franz Automatic control device for track tamping machines
US3135222A (en) * 1960-03-01 1964-06-02 D Angelo Alfonso Rail anchor placement machine
US3177813A (en) * 1960-09-09 1965-04-13 Stewart John Kenneth Railroad maintenance device
US3144837A (en) * 1961-03-21 1964-08-18 Roy C Patton Work apparatus for use on railroads and the like

Also Published As

Publication number Publication date
DE1070661B (cs)
CH351993A (de) 1961-02-15
FR72047E (fr) 1960-03-21
GB802795A (en) 1958-10-08

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