US1231102A - Track-grinding machine. - Google Patents

Description

F. J. VENNING.

TRACK GRINDING MACHINE.

APPLICATION FILED MAY 29, I913.

1,231,102, Patented June 26,1917.

4 SHEETSSHEET I- Aft rnez F. J. VENNING.

TRACK GRINDING MACHINE.

APPLICATION FILED MAY 29, 1913.

1 ,23 l ,1 02 I Patented June 26, 1917.

4 SHEETS-SHEET 2.

Win26 $68.

MM mdzww 19M F. J. VENNING.

TRACK GRINDING MACHINE.

APPLICATION FILED MAY 29, 1913.

Patented June 26, 1917.

4 SHEETS-SHEET 3.

F. J. VENNING.

TRACK GRINDING MACHINE.

APPLICATION FILED MAY 29, 1913- Patented June 26, 1917.

4 SHEETS-SHEET 4.

L FRANK J. VENNING, -01" CINCINNATI, oH'Io.

TRACK-GRINDING MACHINE.

the details of construction and arrangement of parts as will hereinafter be more fully described and claimed- In the drawing: Figure- '1 is a plan view of a device embodying my invention, the controller box and connections being omi-tted,-for clearness.

Fig. 2 is a front elevation of the same, the machine being illustrated in both of these views as with the grinding shaft in upright position to apply the grinding wheel thereon to the track rail. v

Fig. 3 is a front elevation of the machlne with the grinding shaft raised to horizontal position and having a flexible shaft connected thereto carrying the grinding wheel to be applied by hand to the rail or other parts needing grinding. A tool grinding wheel secured on the grinding shaft in place of the flexible shaft is also indicated, by dotted lines.

Fig. 4 is a sectional end elevation on the line rr-x of Fig. 1.

Fig. 5 is alongitudinal vertical section on the line j1 1 of Fig. 1. only part of the machine being shown. and part of a. track rail being represented with the cupped grinding wheel applied thereto.

7 As illustrated and as I prefer to construct my invention the grinding arbor 1 is the armature shaft of the motor 2. This arbor 1 has a reduced end part 3 upon whgh the grinding wheel 4 is secured by collars 5 and the 'nut 6, as is ,usual in securing grinding 'wheels on their arbors.

By bringing the motor 2 into position with the axis of its shaft approximately vertical, the grinding wheel 4 isapplied to the rail while directly mounted on the. motor shaft. This direct application, in direction axially 'oflhe motor shaft, is accompanied I Specification of Letters Patent.

Patented June 26, 1917.

\ 1 Application filed May 29, 1913. Serial No. 770,627.

with the use of a cupped grinding wheel such as the wheel 1L- This use of the cupped grinding wheel is in itself a highly beneficial improvement in rail grinding. In the use of a grinding wheel applying its periphery to the rail, the conditions are such that there is excessive bounding and chattering of the wheel on the work, producing such vibration and accompanied with so much lost motion in-the bearings that it is very diflicult to do satisfactory work except with a very heavy machine. The cfipped wheel, grinding with a plane annular surface at right angles with its axis, grinds across the face of a rail in two directions at the same time, in region's sufiiciently separated along the rail to insure steadiness of the wheel and practically eliminate the bounding and chattering so objectionable with the peripherally engaging. grinding wheels. I I

While it is thus desirable to apply the '7 cupped wheel to the rail with upright arbor,

it is also desirable to use other wheels, such as a wheel forLroughing and throat-grinding.- There are alsoother tools to be rotated by power in track work. such as drills and reamers, which it is desirable -to drivebv the same motor; also the grinding of tools readily without taking them far away from the work is desirable. I therefore provide means for adjusting the motor 2 to, a position with its'shaft or arbor 1 having its axis horizontal as shown in Fig. 3. where the peripherally-grinding wheel 7 is mounted in a hand piece 8 and connected to the arbor 1 by a flexible shaft 9. Thusthe wheel 7 may be applied to any part of the track or other work in any position. The wheel 10. indicated by dotted lines. may be secured on the arbor 1 if the flexible shaft 9 be removed. and is thus available for tool grinding.

In its horizontal position, the arbor 1 simply turns in a, bearing 11 at the commutator end of the motor. and in a bearing 12 at the other end. under the same conditions as are found in. the operation of any motor with horizontal armature shaft, but, to carry the arbor in its upright position, the bearing 12 is supplemented by an endthrust bearing 13. On the commutator end 1 of the motor, anv adjusting screw 14 is mounted in a yoke 15 that arches over the bearing 11, this screw engaging the end of the arbor or shaft 1 to adjust it axially and take up any end thrust which it may have,

thus eliminating even such slight amount of chattering as would otherwise be incident to the operation of the cupped wheel 4.

By the above means, very accurate results are obtained by ,proper adjustment of the grinding wheel to the surface to be ground.

For affording this adjustment, the entire- 22 fixed oh the screw. This screw has the hub 19 for its nut, and thus carries the entire weight of the slidable base 16 and the motor and. other parts mounted thereon.

The screw 20 extends a' suitable distance above the bracket 21 and has a hand wheel 23. When this screw 20 is turned by the hand wheel and with the face plate 17 forming an accurate guide for the entire motor in axial direction, it is possible to accurately regulate the closeness of the 'grinding wheel to the work.

It is alsodesirable to adjust the angle at which the grinding wheel 4 is applied to the railor other track part, such as for grinding rails on elevated curves and for facilitating difiicultoperations in other parts of the track. I provide for this adjustment of inclination, and also for the complete horizontal adjustment, by pivoting the face plate 17, at its lower end. This pivoting of the face plate 17 is accomplished by means of hinges 24 connecting the face plate to hubs of the hinge bar 25 that .extends along the lower end of the face plate. These hubs embrace the rear and front tubular frame bars 26 and 27 which extend parallel at right angles to the hinge bar and flank the motor 2. The rear frame bar 26 has, to the rear of the motor, a fork 28, receiving the rear track wheel 29 and a similar fork 30 on the front frame bar 27 in front of the inotor, carries the forward track wheel 31. These wheels run on the rail that is being ground. Near the other ends of the frame bars 26 and 27 are the fork 32, with the other rear track wheel 33, and the fork 34 with the other front track wheel 35 which wheels run on the otherrail of the track. These forks 32 and 34 are joined by a tubular strut 36, running parallel with the track rail. A clip 37 1s secured around this strut 36 and receives the eyes of rods 38 and 39, pivotally held therein by a pin or bolt 40 through the end parts of the clip and through these eyes. These rods 38 and '39 have their other ends threaded and entering turn-buckles 41 and 42 I which have hand wheels 43 and 44 and receive the threaded ends of. other rods 45 and 46, respectively. Thus, the rod 38, turnbuckle 41, and rod 45 makeup an upper connecting element, and the rod: 45- has an eye that is brought between cars 47 at the middle of the upper end of the face plate 17 with a pin 48 passing horizontally therethrough, therebyi permitting pivotal movements of the connecting element with respect to the face plate in the vertical plane of the swinging of the face plate. The connection of this element with the clip 37 by means of the bolt 40 is sufficiently loose to provide the required articulation at that point. By rotating the turn buckle 41 by means of its hand wheel 43, the rods 38 and 45 will be screwed toward or away from each other, thus shortening or lengthening the connecting element which they make up, with the result that the motor is inclined more or less toward the inside of the track,

thus affording the required adjustment of the inclination of the grinding wheel 4. In the lower connecting element, made up of the rod 39, turn-buckle 43, and rod 46, the rod 46 has an eye lying on top of the hinge bar 25, at its middle, with a bolt or. pin 49 through the eye securing the connection to this hinge bar. The hubs of this hinge bar are loose on the frame bars 26 and 27, and when this lower connecting element is shortened or lengthened by the operation of the turn-buckle 42, the entire face plate and motor, and the parts carried thereby, are adjusted bodily toward the inside or outside of the track, thus governing the position of grinding wheel transversely of the rail. By manipulating both connecting elements, the grinding wheel may be made to bear upon the rail within any desired region of its annular plane surface and to engage at any required angle. The manipulation of the hand wheel 23, adjusting the parts axially, is also involved in this adjustment.

To bring the motor and other parts to the horizontal position, 'the pin 48 is withdrawn, disconnecting the upper connecting element from the face plate, and the entire upper connecting element is swung aside, pivoting on the pin 40 at its other end, permitting the motor and other parts to be swung upward, and bringing the ears 47 down to embrace the ear 50 on a supporting bar 51 that has hubs embracing the frame bars 26 and 27. This bar 51 thus supports the motor in horizontal position, and the pin 48 is inserted through these ears to hold the parts in this position. The upper connecting element simply rests beside'the motor as seen in Fig. 3.

The motor is supplied with current through the flexible cable 52 leading from the controller-box 53, Which is mounted on the frame bars 26 and '27 near the side of the machine opposite from the motor. Through this controller-box, suitable connect-ion may be had with the trolley wires or other source of current along the track.

The track wheels, and especially the track wheels 29 and ,31 that run on the track rail being ground, are preferably turned true, thus adding to the accuracy of the grinding.

The front track wheels 31 and 35 are loosely mounted on spindles 54 and 55 in the forks and 34. respectively. To suitably reenforce these forks, a tubular bolster 56 extends from one fork to the other across the track. The rear track wheels 29 and 33 are pinned to an axle 57 extending across the track and journaled in the forks '28 and 32. A spur pinion 58 is fixed on this axle 57. and the bifurcated yoke pieces 59 have members bearing on the axle 57 'and flanking this pinion. The other members of the yoke pieces The feed lever 66 has bifurcations 67 thatflank the gear 64 but come between the yoke pieces 59. and pivots on the pin 65 that forms thebearing for the gear 64. so that the lever is concentric with the gear 64. Thislever 66 has a detent 68 pressed down by a spring 69 and raised by a pawl 70 on the handle of the lever, Vhen this detent is raised, the lever may be swung around the gear 64, and the detent'68 may descendbetween any two teeth of the gear. By this means, the lever 66 may be swung backward or forward with the detent disengaging. and then; engaging, swing forward or backward and rotate the gear 64 accordingly. This moves the entire machine forward or backward along the track, by the driving action of the'gear '64 through the pinions 62 and 58 and the axle 57. to the track wheels '29 and 33. bearing on the rails. The idler pinion 63 is interposed so that a swing of the lever will drive the machine in the same instead of an opposite direction. The operator stands to the rear of the axle 57. just inside the rail being ground. and by manipulating the lever 66 may feed the machine along the rail to produce the exact grinding efl'ect desired and may reciprocate the. machine along the rail as required. At the same time. the hand wheel 23, for adjusting the closeness of the contact of the grinding wheel with the rail, is also readily accessible, while the operator stands in such )moderate distances. as from one railjoint to another, or as from one switch to another. 'ith the detent thus released, the gear 64 revolves freely as the machine runs along the track. For transporting the machine considerable distances, it is moreconvenient to place it upon some other vehicle such as a car or wagon. To facilitate the handling of the machine for transportation in this way. or for removal from the track whenever desired to allow traffic to proceed or for the use of the machine with the motor in horizontal position, I provide the transfer wheels 71 and '72 turning on pins 73 and 74 in forks 75 and 76 respectively, which forks are connected by a bolster 77. These forks 75 and 76 are preferably integral with the forks 28* and" 30" that receive the track wheels 29 and 31 adjacent to the motor. and extend transversely outside the track bein ground. The frame bar 27 extends into. this: forks 73 and 74, and they along with the forks 28 and 30 are rigidly secured to these frame bars as before mentioned. Thus mounted, the axial line of the wheels 71 and 7 2 is parallel to the track rail. and the wheels; which merely have plain rims to bear on the surface of the 100 road or street. are carried by these forks at such a height that when the end of the machine at the other side of the track is raised a convenient distance. the motor end of the machine will be carried on these wheels 71 and 72. and the flanges of the wheels 39 and 31 will clear their track rail, so that the machine may be pushed transversely off the track. For handling the machine in this way. the frame bars 26 and 27 have a tubular handle bar 78 secured in blocks 79 extending up from the frame bars near the ends thereof. The ends of this handle bar 78. as well as the adjacent ends of the frame bars 26 and 27. are closed by caps 80. By these means the machine, with a motor of ample power and all other parts in proportion. is readily handled by two men. since most of the heavy parts of the machine are located at the motor end. which is carried on the transfer wheels. giving the men *a long leverage when they pull upward on the handle bar 78. Thus. not only is the machine made light in proportion to the work it is to do. but suchweight as it has is described.

While I have specifically shown and dev to secure by Letters Patent is:

scribed a construction to exemplify my invention, I do not wish to be understood as being limited to the exact disclosure herein made'but what I claimxas new and desire 1. In a track-grinding machine, motive apparatus comprising an arbor, a grinding wheel on said arbor, means for adjusting the position of the motive apparatus to bring the arbor into upright position and apply the grinding wheel thereon axially to a track part to grind said track part, and to remove said arbor from upright position, and means contacting with the track part being ground for supporting the motive apparatus, arbor, and grinding wheel and for feeding them along said track part.

2. In a track-grinding machine, motive apparatus, an arbor rotated thereby, a grinding wheel rotated with the arbor to be applied axially to a track part to grind said track part, said motive apparatus, arbor, and grinding wheel being adjustable bodily, means for adjusting them bodily with relation to said track part, and means contacting with the track part being ground for supporting said motive apparatus, arbor, and grinding wheel and for feeding them along said track part.

In a track-grinding machine, motive apparatus, an arbor rotated thereby, a grinding wheel rotated with the arbor to be applied axially to a track part to grind said track part, said motive apparatus, arbor, and grinding wheel being adjustable bodily, and means for adjusting their inclination transversely of said track part.

4, In a track-grinding machine. motive apparatus, an arbor rotated thereby, and a grinding wheel rotated with the arbor to be applied to a track part. said motive apparatus, arbor and grinding wheel being adjustable bodily, means for adjusting their inclination to said track part. and means for adjusting them up and down with relation to said track part.

5. In a track-grinding machine, motive apparatus, an arbor rotated thereby, and a grinding wheel rotated with the arbor to be applied to a track part, said motive apparatus. arbor and grinding wheel being adjustable bodily, means for adjusting their inclination to said track part, and means for adjusting them transversely of said track part.

6. In a track-grinding machine. motive apparatus, an arbor rotated thereby, and a grinding wheel rotated with the arbor to be applied to a track part. said motive apparatus, arbor and grinding wheel being adjustable bodily, means for adjusting their inclination to said track part. means for adjusting them up and down with relation to said track part, and means for adjusting them transversely of said track part.

7. In a track-grinding machine, grinding means acting transversely of a track part to grind said track part, means for adjust-- ing said grinding means up or down with relation to said track part, and means con- 'tacting with the track part being ground for supporting said grinding means and its adjusting means, and for feeding the grinding means along said track part.

8. In a track-grinding machine, motive apparatus, an arbor rotated thereby, and a grinding wheel rotated with the arbor to be applied to a trackpart, said motive apparatus, arbor and grinding wheel being adjustable bodily, meansfor adjusting their inclination with relation to said track part, and means for feeding them along the track part.

9. In a track-grinding machine, motive apparatus, an arbor rotated thereby, a grinding wheel rotated with the arbor to be ap plied axially to a track part tb grind said track part, said motive apparatus, arbor and grindln wheel being adjustable bodily, means oradjusting them with relation to said track part, and "means contacting with the track part being ground for supporting them on and feeding them along said track art.

p 10. In a track-grinding machine, motive apparatus, an arbor rotated thereby, a grinding wheel rotated with the arbor to be applled axially to a track part to grind said track part, said motive apparatus, arbor and grinding wheel being adjustable bodily, means for adjusting them up ordown with relation to said track part, and means contacting with the track part being ground for supporting them on and feeding them along said track'part. Y

11. In a track-grindingmachine, motive apparatus, an arbor rotated thereby, a grinding wheel rotated with the arbor to be applied axially to a track part to grind said track part, said motiveapparatus, arbor and grinding wheel being adjustable bodily, means .or adjusting them transversely of said track part, and means contacting with the track part being ground for supporting them on and feeding them along said track part.

12. In a track-grinding machine, motive apparatus, an arbor rotated thereby, and a grinding wheel rotated with the arbor to be applied to a track part, said motive apparatus, arbor and grinding wheel being ad- 120 justable bodily, means for adjusting their inclination to said track part, means for adjusting them up and down with relation to said track part, and means for feeding them along the track part. r,

13. In a track-grinding machine, motive apparatus, an arbor rotated thereby, and a grinding wheel rotated with the arbor to be applied to a track part, said motive apparatus, arbor and grinding wheel being adjustable bodily, means for adjusting their inclination to said track part, means for adj usting them transversely. of said track part, and means for feeding them along said track art. P 14. In a track-grinding machine, motive apparatus, an arbor rotated thereby, and a grinding wheel rotated with the arbor to be i applied to a track part, said motive apparatus, arbor and grinding wheel being adjustable bodily, means for adjustin their inclination to said track part, means Ior adjusting them up and down with relation to said track part, means for adjusting them transversely of said'track part, and means for feeding them along the track part.

15. In a track-grinding machine, motive apparatus, an arbor rotated thereby, a grinding wheel rotating with the arbor to be applied axially to a track part to grind said track part, a truck to bear on the track part being ground, and adjustable supporting means for the motive apparatus on the truck whereby said motive apparatus is adjusted between a position with its arbor horizontal and a'position with its arbor upright to apply the grinding wheel to the track part. 16. In a track-grinding machine, motive apparatus, an arbor rotated thereby and a grinding wheel rotating with the arbor, a truck to bearon the track,- adjustable supporting-means for the motive apparatus on the truck, whereby said motive apparatus is adjusted between a position with its arbor horizontal and a position with its arbor upright to apply the grinding wheel to a track part, and means on the truck for adjusting the inclination of the motive apparatus when in position with its arbor upright.

17. In a track-grinding machine, motive apparatus, an arbor ro tated thereby and a grinding wheel rotating with the arbor, a

V truck to bear on the track, adjustable supporting-means for the motive apparatus on the truck, whereby said motive apparatus is adjusted between a osition with its arbor horizontal and a posltion with its arbor upright to apply the grinding wheel to a track art, means on the truck for adjusting the inclination of the motive apparatus when in position'with its arbor upright, and a connection between the adjusting means and the motive apparatus whereby the adjusting means may be disconnected to bri ng said motive apipraratus into position with its arbor removed om the uprlght position. 18. In a track-grinding machine, motlve apparatus, an arbor rotated thereby,-a 1ndin wheel rotating with the arbor to e apphed axially to a track part to grind the being ground, and means supporting justment along the truck transversely of said track part. s

19. In a track-grinding machine, motive apparatus, an arbor rotated thereby and a grinding wheel rotating with the arbor, a truck bearing on the track, adjustable supporting-means for the motive apparatus on the truck whereby said motive apparatus is adjusted between a osition with its arbor horizontal and a position with its arbor up right to apply the grinding wheel to a track part, and means for adjusting said adjustable supporting-means along the truck transversely of the track when the motive apparatus is in position with its arbor upright.

20. In a track-grinding machine, motive apparatus, an arbor rotated thereby and a grinding wheel rotating with the arbor, a truck bearing on the track, adjustable supporting-means for the motive apparatus on the truck whereby said motive apparatus is adjusted between a position with its arbor horizontal and a position with its arbor upright to apply the grinding wheel to a track part, means for adjusting said adjustable supporting-means along the truck transversely of the track when the motive apparatus is in position with its arbor upright, and means for adjusting the inclination of said motive apparatus with relation to the truck and the track when said motive apparatus is in said position with its arbor upright.

21. In a track-grinding machine, motive apparatus, an arbor rotated thereby and a grinding wheel rotating with the arbor, a

'supportin -means along the truck transversely o the track when the, motive apparatus is in position with its arbor upright,

means for adjusting the inclination of said motive apparatus with relation to the truck and the track when said motive. apparatus is in said position with its arbor upright and a connection between the inclinationadjusting means and said motive apparatus whereby said inclination-adjusting means may be detached from the motive apparatus for adjustment of the motive apparatus intoposition with its arbor out of upright position. p

22. In a track-grinding machine, motive apparatus, an arbor rotated thereby and a grinding wheel 'rotating with the arbor to be applied to a track part, supporting means for the motive apparatus, a truck comprising frame bars flanking the motive apparatus, track wheels rotatably supported from the frame bars to run on the track rails, whereby the motive apparatus issupported over one of the rails, transfer wheels ro- 25 joining said front and rear frame bars, a

tatably supported from the frame bars adjacent to the motive apparatus w1th thelr centers above the centers of the track wheels,

and lifting means connected. with the frame bars whereby said bars apply leverage to I the motive apparatus with a fulcrum, first,

on the track wheels adjacent to the motive apparatus, and then onthe transfer wheels, said transfer wheels supporting the machine for removal transversely from the track.

.23. In a track-grinding machine. motive apparatus and a grinding wheel rotated,

thereby 'and applied with the motive apparatus axially to a track part in the region of one railof the track, frame bars flanking the motive apparatus forwardly and rearwardly and extending transversely of the track, track wheels bearing on the respective rails of the track forwardly and rearwardly of the frame bars, projections on the frame bars on which the track wheels are rotatably supported, a hinge bar joining said frame bars from front to rear, a support for the motive apparatus pivoted on said hinge bar to swing transversely of the track, a strut motive apparatus forwardly and rearwardly and extending transversely of the track,

track wheels bearing on the'respective rails of the track forwardly and rearwardly of the frame'bars, projections on the frame bars on which the track wheels are rotatably supported, supporting means for the motive apparatus joining the frame bars and adjustable therealong, a strut joining the front and rear frame bars, a connecting element from said strut to said supporting means,

and means for adjusting the length of said connecting elemen 25. In a track-grinding machine, motive' apparatus and. a, grinding wheel rotated thereby and applied with the motive ap paratus axially toa track part in the region of one rail of the track, frame bars flanking the motive app ratus forwardly and rearwardly and extending, transversely of the track, track wheels bearing on the respective v rails ofthe track forwardly and rearwardly of the framefbars, projections on the frame bars onwhich the track wheels are rotatably supported, a h nge bar joining the front and it rear framewba'rs and slidable therea'long, a

strut joining the-frontand rear-frame bars, a connecting elementfrom the strut to the hinge bar, means for adjusting the length of said element, a support for the motive apparatus pivoted on the hinge bar to swing transversely of the track, and a second connecting element from said strut to the motive-apparatus-support at a point removed from the pivotal mounting of said support, and means for adjusting the length of said second connecting element.

26. In a track-grinding machine, motive apparatus and a grinding wheel rotated thereby and applied with the motive apparatus axially to a track part in the region of'one rail of the track, frame bars flanking the motive apparatus forwardly and rearwardly and extending transversely of the track, track wheels bearing on the respective rails of the track forwardly and rearwardly of the frame bars, projections on the frame bars on which the track wheels are rotatably supported, a support for the motive appa; ratus and pivotal connection between said support and the front and rear frame bars whereby the motive apparatus and its support swings transversely of the track, and means receiving the motive apparatus sup port to hold the motive apparatus with said grinding wheel out of position for application axially to the track part.-

'27. In a track-grinding machine, motive I apparatus and a grinding wheel rotated. thereby and applied with the motive apparatus axially to a track part in the region .of onerail of the traclgvframe bars flanking the motive apparatus forwardly and rearwardly and extending transversely of the track, track wheels bearing on the respective rails of' the trackforwardly and rearwardly of the frame rbars, pro

jections on the frame bars on which the track wheels are rotatably supported, a base for themotive apparatus, a face plate, pivotal connection between the face plate and the frame bars whereby the face plate swings transversely of the track, said base being slidable in the face plateparallel with the axis of the grinding wheel, and means for sliding said base'i'n the face plate and holding it therein in adjusted positionl 28. In a track-grinding machine, motive apparatus and a grinding wheel rotated thereby and applied with the motive apparatus axially to a track part in the region of one rail of the ,track, frame bars flanking the motive apparatus forwardly and rearwardly'and extending transversely of the I track, track wheels bearing on the respective rails of the track forwardly and rearwardly of the frame bars, rejections on the framebetween the face p ate and the frame bars,

whereby the face plate swings transversely I I of the track, said "base being slidable in the face plate parallel with the axis of the grindin wheehmeans for-sliding said base in the ace plate and holding it therein in.

adjusted position, the pivotal connection of thereby and applied with the motive apparatus axially to a track part in the region of one rail of the track, frame bars flanking the motive apparatus forwardly and rear- .wardly and extending transversely of the track, track wheels bearing on the respective rails of the track forwardly and rearwardly of the frame bars, project-ions on the frame bars on which the track wheels are rotatably supported, a base for the motive apparatus, a faceplate, pivotal connection between, the face plate and the frame bars whereby the face plate swings transversely of the track, said base being slidable in the face plate parallel with the axis of the grinding wheel, means for sliding said base in the face late and holding it therein in adjusted position, the pivotal connection of the face plate vwith the frame bars being slidable along the frame bars, a strut between the frame bars, a connecting element from the strut to the slidable pivotal connection, means for adjusting the length of this connecting element, a second connecting element from said strut to the face plate at a point removed from the pivotal mounting of the face plate, and means for adjusting the length of this second connecting element.

30. In a track-grinding machine, a grinding wheel having a plane surface applied axially to a track part and grinding the track part with remote regions of its plane surface simultaneously and means for rotating and applying said grinding bars on which the track Wheels are rotatably supported, a basefor the motive apparatus,

, a'face plate, pivotal connection between the face plate and the frame bars whereby the k face plate swings transversely of the track,

, sald base being parallel with the axis of the grinding wheel,

slidable in the face plate a screw engaging between the face plate and said base,n parallel with the axis of the grinding ,wheel, and means for rotating said screw to slide said base in the faceplate, said screw holding the base in adjusted posi motive apparatus forwardly and rearwardly and extending transversely of the track,

' trackwheels bearing on the respective rail of the track forwardly and rearwardly of the frame bars, projections on the frame bars on which the track wheels. are rotatably supported, a base for the motive apparatus, a face plate, pivotal connection between the face plate and the frame bars whereby the face plate swings transversely of the track, said base being slidable in" the face plate parallel with the axis of the grinding wheel, means for sliding said base in the face plate and holding it therein in adjusted position,

a strut between said frame bars, and a connecting element from said strut to said face plate at a point removed from its pivotal mounting, and means for adjusting the length of said element.

32. In a track-grinding machine, motive apparatus and a grinding wheel rotated thereby and applied with the motive apparatus axially to a track part in the region of one railof the track, frame bars flanking part with remote regions of its annular plane surface grinding the track part simultaneously, means for rotating said grinding wheel, and means contacting with the track 'part being ground for supporting said grinding. Wheel and its rotating means and for feeding said grinding wheel along said track part. v v

34. In a track-grinding machine,a cupped grinding wheel applied axially to a track part with remote regions of its annular I plane surface grinding the track part simultaneously, means for rotating said grinding wheel, means for adjusting said grinding wheel toward or away from the track part,

and means contacting with the track part 7 being, ground, supporting said grinding wheel and 1ts rotating and its adjusting means, and feeding said grinding wheel along said track part.

35. In a track-grinding machine, a grinding wheel having a plane surface applied axially to a track part and grinding the track part with remote regions of its plane surface simultaneously, means for rotating said grinding Wheel and means for adjusting the inclination of said grinding wheel to said track part. 1

36. In a track-grinding machine, a grinding wheel having a plane surface applied axially to a track' part and grinding the track part with remote regions of its-plane surface'simultaneously, means for rotating said grinding wheel and means for adjusting said grinding wheel transversely of the track part.

37 In a track-grinding machine, a grinding wheel having a plane surface applied axially to a track part and grinding the track part with remote regions of its plane surface simultaneously, means for rotating said grinding wheel, means for adjusting the grinding wheel toward or away from said track part, and means for adjusting the inclination of said grinding wheel to said track part.

38. In a track-grinding machine, a grindingwheel having a plane surface applied axially to a track part and grinding the track part with remote regions of its plane surface simultaneously, means for rotating said grinding wheel, means for adjusting the inclination of said grinding wheel to said track part, and means for adjusting a said grinding wheel transversely of said track part.

39. In a track-grinding machine, a grinding wheel having a plane surface applied axially to a track part and grinding the track part with remote regions-of its plane surface simultaneously, means for rotating said grinding wheel, means for adjusting said grinding wheel toward or away from said track part and means for adjusting said grinding wheel transversely of said track part.

40. In a track-grinding machine, a grinding wheel having a plane surface applied axially to a track part and grinding the track part with remote regions of its plane surface simultaneously, ineans for rotating said grinding wheel, means for adjusting said grinding wheel toward or away from said track part, means for adjusting the inclination of said grinding wheel to said track part, and means for adjusting said grindingwheel transversely of said track part. I

FRANK J. VEN NING.

IWitnesses:

JAMES N. RAMSEY, CLARENCE PnRDEw.

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