US1305954A - Tback-grxffldilig machine - Google Patents

Description

F. J. VENNING.

TRACK GRINDING MACHINE.

APPLICATION FILED JUNE 22. 1911.

Patented une 3, 1919.

7 SHEETS-SHEET I z wz/atwe F. J. VENNING.

TRACK GRINDING MACHINE.

APPLICATION FILED JUNE 22. 1917.

1 ,395, 95%, Patented June 3, 1919.

7 SHEETS-SHEET 2- VENNING.

TRACK GRINDING MACHINE.

APPLICATION FILED JUNE 22. I917.

Patnted June 3, 1919.

YSHEETS-SHEET 3.

F. J. VENNING.

TRACK GRINDING MACHINE. APPLICATIONIFILED JUNE 22. 1911.

Patented June 3, 1919.

TSHEETS-SHEET 4- Wz'mwsses: @Mg% F. J. VENNING.

TRACK GRINDING MACHINE.

APPLICATION FILED JUNE 22. 1917.

1,305,954, Patented June 3, 1919.

7 SHEETS-SHEET 5.

F. J. VENNING.

TRACK GRINDING MACHINE.

APPLICATION FILED JUNE 22. 1917.

Patenwd June 3, 1919.

7SHEETS'SHEET 6- F. J. VENNING. TRACK GRINDING MACHINE. APPLICATION FILED JUNE 22 I917.

Patented June 3, 1919.

7 SHEETS-SHEET 7.

FRANK J. VENNING, OF CINCINNATI, OHIO.

TRACK-GRINDING MACHINE.

To all whom it may concern:

Be itknown that I, FRANK J. VENNING, a citizen of the United States, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Track- Grinding Machines, of which the following is a specification.

My invention relates to railway-trackgrinding machines; and the object is to produce a machine of this character of simplified construction and efficient operation.

My invention consists in the parts and in the details of construction and arrangement of parts as will hereinafter be more fully described and claimed. a

In the drawings:

Figure 1 is a general perspective view of a device embodying my invention, the motor being in horizontal position and the con troller box being represented merely by dotted lines;

Fig. 2 is a similar view, the motor being in its inclined position and the device" being removed from the track and resting upon its track wheels and transfer wheels upon the surface of the street;

Fig. 3 is a vertical longitudinal sectional elevation of the motor end of the device with the motor in vertical position, the section being on a line through the center of the motor but the motor being shown in elevation;

Fig. 4 is a vertical cross section on a line corresponding to the line ww of Fig. 3, parts being represented as broken away for lack of space;

Fig. 5 is a partial plan View showing the means for. locking the motor in its horizontal adjustment Fig. 6 is a partial cross sectionv showing the locking means at one side in locked position;

Fig. 7 is a general perspective view similar to Fig. 1, but showing a modification of my invention in which the transfer wheels are mointed on the truck outside the track rail; an

Fig. 8 is a vertical longitudinal sectional elevation of the motor end of the device similar to Fig. 3, but showing this modification of Fig. 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 Which the Specification of Letters Patent.

Patented June 3, 1919'.

Application filed June 22, 1917. Serial No. 176,397.

' such as the wheel 4:. This use of the cupped grinding wheel is in itself a highly bene' ficial improvement in rail grinding. In the use of a grinding wheel applying its periphery to the rail, the conditions are such that I 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 difiicult to do satisfactory work except with a very heavy machine. The cupped 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 regionssufiiciently separated along the rail to insure steadiness of the wheel and practically eliminate the boundingand chattering so objectionable with the peripherally engaging grinding wheels.

While it is thus desirable to ap ly the cupped wheels to the rail with upright arbor, it is also desirable to use other wheels, such as a wheel for roughing and throat-grinding. There are also other tools to be rotated by power in track work, such as drills and reamers, which it is desirable to drive by 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 aifxis horizontal as shown in Figs. 1 and 7.

When the motor is adjusted to this horizontal position the reduced end part 3 may receive a peripherally-grinding wheel 7 se cured as is usual in disease of mounting such wheels by means of a nut 8 as shown in Figs. 1' and 7. Such a wheel is useful for grinding tools. For roughing and throatgrinding a grinding wheel 9 may be driven by a flexible shaft 10 suitably connected to is supplemented by an end-thrust bearing 13.

On the commutator end of the motor, an adusting 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 motor 2 is mounted on the base 16, which is slidable parallel to the arbor axis in a face plate 17 being held in said face plate by cleats 18 at the sides. This slidable base 16 has a hub 19 in its middle, and a screw 20, .with its axis parallel to the arbor axis, is journaled in a bracket 21 at the upper end of the face plate 17 and confined against axial movementin the bracket by a collar 22 fixed on 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 also desirable to adjust the angle at which the grinding wheel 4 is applied to the rail or other track part. such as for grinding rails o-n elevated curves and for facilitating difficult operations in other parts of the track. I provide for this adjustment of inclination, and also for the complete horizontal adjustment, bypivoting the face plate .17, at its lower end. This pivoting of the face plate 17 is accomplished by means of hlnges 24 connecting the face late to hubs of the lnnge bar 25 that extends along the lower end of the face plate. These hubs em brace 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 motor, 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 the other rear track wheel 33 and the front mosses fork 34 with the other front track wheel 35,

which wheels run on the other rail of the track.

Shafts or axles 36 and 37, respectively, extend across the track and bear in the forks 28 and 32 and 30 and 34, respectively. The wheels 29 and 31 that run on the rail that is being ground are fixed to their respective axles, but the wheels 33 and 35 which run on the other rail of the track turn loosely on the axles and may he slid along the axles with their forks, said forks being joined by a strut 38 running parallel with the track rail. By this means the device is adjustable to run on tracks of different gages. This strut 38 carries brackets 39 that support the controller box 40 as indicated in Fig. 1.

To adjust the inclination of the motor and grinding wheel throughout the range from its horizontal position to its positions for bringing the cupped grinding wheel directly upon the rail, a segmental rack 41 with internal rack teeth 42, arranged concentric with the hinges 24 ofthe face plate 17, is provided on one of the hubs of the hinge bar 25 at one side of the motor, this rack being preferably formed integral with part of the hub. -Pivoted concentric with these hinges 24 is an arm 43 and a shaft 44 extends out through the segmental rack 41 and through the arm 43. A pinion 45 is keyed on this shaft 44 and meshes with the segmental rack teeth 42, this pinion having fixed to it and concentric with it, a large gear 46 occupying space between the segmental rack 41 and the arm 43.] Outside the arm 43 the shaft 44 has a threaded part 47 upon which runs a hand wheel 48 that maybe screwed. inward against the arm 43, thereby clamping said arm and the gear and pinion tightly together so that the gear and pinion cannot turn.

The arm 43 extends farther upward from the shaft 44 past the periphery of the large gear 46 and a shaft 49 has a bearing in this fixed on the top of the face plate 17 while, between the two bearings thus formed, said shaft 49 has a pinion 51" fixed on it meshing with the large gear 46. Outside the arm 43 the shaft 49 is provided with a crank 52 for manually turning it.

By the above described means the inclination of the motor and the grinding wheel may be varied by loosening the hand wheel 48 and turning the crank 52, thus turning the large gear 46 which causes the pinion 45 to coact with the rack teeth 42 moving the face plate 17 along the segment. Vhen the parts have been brought to the required adjustment, the hand wheel 48 may be screwed up to tighten the parts as before described, upon which the motor will be rigidly held in its adjusted position. It will be seen that the, ratio between the pinion 45 and the segarm 43 and another bearing in a bracket-5Q;

reoaeee mental rack 421s multiplied into the ratio of the pinion 51 to the large gear 46, so that rapid turning of the crank 52 results in slow movement of the face plate 17 carrying the motor and grinding wheel. By virtue of this provision a fine adjustment is possible, and it is also ossible to make the adjustment with less exertion on the part of the operator than is required where the weight of the face plate and motor and other parts may be directly overcome. An eccentric stop 53 isbolted to the upper end of the segmental rack 41, and may be set to stop the parts at the desired track-grinding inclination without the necessity of fine adjustment each time the motor and grinding wheel are lowered.

For adjusting the motor and grinding wheel transversely of the track, a bifurcated rod 54 has its members above and below the hinge bar 25- and is thereby pivoted to this hinge bar by a vertical pin 55 passing through the members and through the hinge bars. The part of this rod 54 near its other end is threaded and runs through a beam 56 that has hubs embracing the front and rear frame bars 26 and 27 and fixed thereto. The hubs of the hinge bar 25 are slidable on these frame bars. The beam 56 has a vertical slot through it in the region where the bar 54 extends through, and in this slot is a gear wheel 57, the hub of which acts as a nut 0n the threaded part of the rod 54. The

standards 58 extend up from the beam 56 at the front and the rear of the gear wheel 57, and in the upper ends of these standards a pinion 59 is rotatably mounted with an idler pinion 60 in mesh with it and with the gear wheel 57 this idler also being rotatably mounted in the standards 58. The pinion 59 has a crank 61 for turning it. This provision makes it possible to transversely adjust the motor and the grinding wheel with facility and accuracy whether the motor and grinding wheel be in raised horizontal p0- sition or in one of their lowered positions.

The motor is'supplied with current from the controller box 40 through a flexible cable 62 as seen in Fig. 1'. Through the controller box 40, suitable connection 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 rear axle 36 has a spur pinion 63 fixed on it and the bifurcated yoke pieces 64 have members bearingon the axle 36 and flanking this pinion. The other members of the yoke pieces 64 flank a clip 65 that is bolted around the other frame bar 26, being secured to this clip by a bolt 66 passing transversely throu h them and between the end parts of the c ip.- Meshing with the pinion .may

63 is an idler spur pinion 67 turning on transverse pin 68 supported in the yoke pieces 64. Above this idler pinion -6'7 and meshing therewith is a spur gear 69 turning on a pin 70 also carried in the yoke pieces 64. The feed lever 71 has bifurcations 72 that flank the gear 69 but come between the yoke pieces 64 so that this lever pivots on the pin 70 that forms the bearing for the gear 69 whereby the lever is concentric with the gear. This lever 71 has a detent 73 pressed down b a spring 74 and raised by a pawl 75 on t e handle of the lever. When this detent is raised the lever may be swung around the gear 69 and the detent 73 may descend between any two teeth of the gear. By this means the lever 71 may be swung backward or forward with the detent disengaging, and then engaging, swing forward or backward and rotate the gear 69 accordingly. This moves the entire machine forward or backward along the track by the driving action of the gear 69 through the pinions 67 and 63, and the axle 36 to the track wheel 29 bearing on the rail that is being ground. The idler pinion 67 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 36 just inside the rail being ground, and, by manipulating the lever 71, may feed the machine along the rail to produce the exact grinding effect desired and reciprocate the machine along the rail as required. At the same time the hand wheel 23 for adjusting closeness of the contact of the grinding wheel with therail and the hand wheel 48 and crank 61 that are to be manipulated in adjusting the inclination of the grinding wheel as well as the crank 61 for the transverse adjustment, are all a readily accessible while the operator stands in such a position that he can readily see the progress of the work upon the rail.

The detent 73 may be drawn up into re leased position and held by a pin 7 6, thus allowing the lever 71 to be swung backward and used as a tongue or handle for drawing the machine along the track when it is to be transported moderate distances as from one rail joint to'another or as from one switch to another. With the detent thus released the gear 69 revolves freely as the machine the machine and on an arm 82 at the other side of the .machine. Thus, the transfer wheels are fore described. The series of rack teeth 42 terminates at such a point that when the motor is brought almost to its full horizontal position as shown in Fig. 1, the pinion 45 will no longer mesh with the teeth, and the transfer wheels 77 and 78 will be allowed to drop down below the level of the track wheels if these track wheels be raised ofl the rails. The end of the machine opposite from the motor has a handle bar 83 mounted on uprights 84 on the ends of the frame bars 26 and 27. 1

To hold the motor in its raised position with the transfer wheels 77 and 78 down, a locking means is provided, which, as is best shown in Figs. 5 and 6, comprises hooks 86 pivoted on lugs 87 at the top of the base plate 17, on opposite sides of the'machine, and extending down and hooking under the frame bars 26 and 27 after the motor is brought to its full'horizontal position. One of the hooks may have a deflector 88 with an inclined surface which engages with the inner upper side of the frame bar 26 as it comes down, and the two hooks are operatively connected by a transverse connecting bar 89, while both of them have handles 90 at the opposite sides of their ivots in the lugs 87. Thus, when the mac ine is lifted by the handle bar 83, allowing the arm 43 and wheels 77 and 78 to drop the hook 86 by the engagement of its defiector88, will move over and move the other hook over at the other side of the machine, so that they will pass down around their respective frame bars 26 and 27. Then when the exertion upon the handle bar 83 ceases, the motor will immediately come back to its intended horizontal .position, whereupon the hooks will tightly engage under the frame bars and the entire apparatus will be very firmly clamped or locked in raised position on the wheels 77 and 78. When it is desired to remove the parts from this position, the machine is lifted by the handle bar 83 and the motor will come back past its horizontal position until the hooks can swing from under the frame bar, and then, by means of either handle 90, both hooks may be manipulated to swing them from under the frame bars, permittingthe motor and track wheels to come down. Handles 85 may also be provided at the motor end of the machine, these being especially desirable where the rails extend above the surface of the road bed, making it necessary to pull the transfer wheels 77 and 78 up over one of the rails in removing the machine from the track.

When it is desired to use a flexible shaft,

aeoaeee such as the shaft 10 for driving a wheel 9 for roughing and throat grinding as hereinbefore alluded to, the machine, after having been wheeled from the track, may have the motor adjusted forward and downward, lowering the entire machine until the track wheels rest upon the surface of the street alongside the track as do also the transfer Wheels 77 and 78. The motor will then have its shaft inclined at an angle of about 45, as is best seen in Fig. 2, while the entire machine will be veryfirmly supported and held against rolling in any direction, on account of the two sets of wheels, differently directed, all bearing upon the surface of the street. Such a position may also be found suitable where a wheel like the wheel 7 is to be used for grinding tools.

In the modication shown in Figs. 7 and 8, the transfer wheels 77 and 78 are provided, turning on a shaft 79 that extends through boxes 91 and 92 in pedestals 93 and 94, respectively, which extend laterally outside the rail from the forks 28 and 30, respectively, these pedestals being formed integral in the respective forks and pinned or riveted along with them upon the end parts of the front and rear frame bars 26 and 27. Thus mounted, the axial line of the wheels 77 and 78 is parallel to the track rail and the wheels which merely have plain rims to bear on the surface of the road or street may be carried by these pedestals 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 7 7 and 78 and the flanges of the wheels 29 and 31 will clear their track rail so that the machine may be pushed transversely ofi the track. Each of the boxes 91 and 92 in the pedestals 93' and 94: has a series of. teeth 95 on one side and the corresponding side of the pedestal has a series of notches 96 receiving these teeth, while the box is made narrow enough with respect to the opening in the pedestal to slide horizontally therein and disengage its teeth 95 from said notches 96. A. key 97 slides down the side of the pedestal opposite from the notched side passing through an opening 98 in the top of the pedestal and fills the space between the box and this side of the pedestal when the teeth of the box are in the notches, thus holding the box rigidly in position. By. withdrawin this key 97 the box may de disengaged and raised or lowered and it is possible by this means to adjust the transfer wheels up and I down with respect to the track wheels to readily adapt the machine for removal from the track at various locations where the level of the road or street may vary with respect to the level of .the track rails.

For handling the machine in the way above described, the frame bars 26 and 27 have a tubular handle bar 83 secured in blocks 84: extending up from the frame bars near the ends thereof.

By either of the above 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 83 or 83. Thus, not only is the machine made light in proportion to the work it is to do, but such weight as it has is handled with facility, due to the novel construction and arrangement of the parts, and the provision of the transfer wheels as just described.

While I have specifically shown and described certain constructions to exemplify my invention, I do not wish to be understood as being limited to the exact disclosure herein made, but What I claim as new and desire to secure by Letters Patent is:

1. In a track grinding machine, grinding means, a truck to run on the track, a support for the grinding means pivoted on said truck to swingtransversely of the track,

' and transfer means mounted on the support.

2. In a track grinding machine, grinding means, a truck to run on the track, a support for the grinding means pivoted on said truck to swing transversely of the track, transfer Wheels mounted on the support, and means for adjusting said support.

3. In a track grinding machine, grinding means, a truck to run on the track, a support for the grinding means pivoted ion said truck toswing transversely of the track, transfer Wheels mounted on the support, a segment, and means whereby said support is held stationary by engagement of the means at various parts of the segment.

4. In a track grinding machine, motive apparatus, and a grindln wheel rotated thereby and applied with t e motive apparatus axially to a track part in the region of one rail of the track, a truckto run on the track, a support forthe motive apparatus pivoted on said truck to swing transversely of the track, a segment, and means whereby said support is held stationary byv engagement of the'means at various parts of the segment.

5. In a track grindin machine, motive apparatus, and a grinding wheel rotated thereby and applied with the motive apparatus axially to a track part in the reglon of one rail of the track, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, a segmental rack, a" pinion meshing with said rack, and means whereby rotation of the pinion swings said support.

6. In a track grinding machine, motive apparatus, and a grinding wheel rotated thereby and applied with the motive appa ratus axially to a track part in the region of one rail of the track, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, a stationary segment, and means on said support engaging with various parts of the segment to adjust said support.

7. In a track grinding machine, grinding means, a truck to run on the track, a support for the grinding means pivoted on said truck to swing transversely of the track, transfer means mounted on the support, said transfer means being brought down by raising the machine when the grinding means is raised away from the track, and means on said support for looking said grinding means in raised position with said wheels thus brought down and thus holding the machine in raised position. 8. In a track grinding machine, grinding means, a truck to run on the track, a support for the grinding means pivoted on said truck to swing transversely of the track, transfer .wheels mounted on the support, means for adjusting said support, said transfer wheels being brought down by raising the machine when the grinding means is raised away from the track, and means on said support for locking said grinding means in raised position with said wheels thus brought down and thus holding the machine in raised position.

v 9. In a track grinding machine, grinding means, a truck to run on the track, a support for the grinding means pivoted on said truck to swing transversely of the track, transfer wheels mounted on the support, a segment, means whereby said support is held stationary by engagement of the means at various parts of the segment, said transfer wheels being brought down by raising the machine when the grinding. means is raised away from the track, and means on said support for locking said grinding means in raised position with said wheels thus brought down and thus holding the machine in ralsed position.

10. 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, a truck to run on the track, .a support for the motive apparatus pivoted on said truck to swing transversely of the track, a segment, means whereby said support is held stationary by engagement of the means at various parts of the segment, transfer wheels mountedon said support, said motive apparatus being raised and bringing the grinding Wheel toward a position with its axis horizontal and the transfer wheels being brought down by raising one end of said machine, and means meshing with said rack.

thereby and applied with the motive ap-' paratus axially to a track part in the reglon of one rail of the track, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, a segmental rack fixed on said truck, and a pinion on said support 12. 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, a truck to run on the track, a support forthe motive apparatus pivoted on said truck to swing transversely of the track. a segmental rack fixed on said truck, a pinion on said support, a gear fixed to said pinion coaxially therewith, a second pinion swinging with said support, this second pinion meshing with said gear, and means for turning this second pinion.

13. 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, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, a segmental rack fixed on said truck, a pinion on said support, a gear fixed to said pinion coaxially therewith, an arm swinging with said support, a second pinion on said arm, this second pinion meshing with said gear, means for turning this second pinion, and means for preventing rotation of said gear and pinion that are fixed together.

14. 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, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, a segmental rack fixed on said truck, a pinion meshing with said rack, a shaft for said pinion mounted on said support, means for turning said pinion, and means for preventing rotation of said pinion.

15. In a track grinding machine, motive apparatus, and a grinding wheel rotated thereby and appliedwith the motive ap paratus axially to a track part in the region of one rail of the track,a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, a segmental rack fixed on said truck, a pinion meshing with said rack, a shaft for said pinion mounted on ion, and means threaded on said shaft to bind the pinion and its rotating means and prevent their rotation.

16. 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, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, a segmental rack fixed on said truck, a pinion meshing with said rack, a shaft for the pinion mounted on said support, a gear fixed to said pinion and coaxial with it on said shaft, a second pinion swinging with said support and meshing with said second pinion, and means 17 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, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, a segmental rack fixed on said truck, a pinion meshing with said rack, a shaft for said pinion, a gear fixed to said pinion and coaxial with it on said shaft, a second pinion swinging with said support and meshing with said gear, means for rotating this second pinion, and means threaded on said shaft for binding the pinion that meshes with the rack andpreventing rotation of said pinion.

18. In a track grinding machine, motive apparatus, and a grinding wheel rotated thereby and applied with the motive apparatus axially to atrack part in the region of one rail of the track, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, asegmental rack fixed on said truck, a pinion meshing with said rack, a shaft for said pinion, a gear fixed to saidpinion and coaxial. with it on said shaft, an arm pivoted concentric with the mounting of said support, embracing said shaft outside the gear and pinion from the segmental rack and extending past the periphery of said gear, a second pinion rothe track, a support for the motive appa ratus pivoted on said truck to swing transversely of the track, asegmental rack fixed on said truck, a pinion meshing'with said rack, a shaft for said pinion, a gear fixed to said pinion and coaxial with it on said shaft, an arm pivoted concentric with the mounting of said support, embracing said shaft outside the gear and pinion from the segmental rack and extending past the periphery of said gear, a second pinion rotatably mounted onisaid arm and meshing with said gear, means for rotating. this sec- 0nd pinion, an extension on said arm, and a transfer wheel rotatably mounted on said extension and adapted to be brought down as the machine is raised, said pinion unmeshing frpm said segmental rack, and permitting saidsupporting means and transfer wheels to drop, and locking means to hold said transfer wheels down.

21. 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, a truck to run on the track, a support for the motive :appa-' ratus pivoted on said truck to swing .t'ransversely of the track, said support being also slidable on said truck transversely of the track, a segment carried slidably with said support, and means carried therewith to engage with various parts of the segment and hold the support stationary at various inclinations, and means to hold said support against its slidable movement on said truck in various positions transversely of the track.

22. In a track grinding machine, motive apparatus, and a grinding wheel rotated thereby and applied with the motive appa ratus axially to a track part in the region of one rail of the track, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, said support being also slidable on said truck transversely of the track, a segment carried slidably with said support, means carried therewith to engage with various parts of the segment and hold 7 the support stationary at various inclinations, and means to hold said sup-portagainst its slidable movement on said truck in various positions transversely of the track,

means, a truck to run on the track, a support for the grinding means pivoted on said truck to swing transversely of the track, means for raising and lowering said support, comprising an arm at one side thereof, an extension on said arm, a transfer wheel rotatably mounted on said extension, whereby the transfer wheel is brought down'by raising the truck from the track, said truck comprising frame bars on which said support is mounted, and locking means comprising a member pivoted on said support and engaging under one of said frame bars to hold the motive apparatus in raised position and to hold said transfer wheels down and hold the truck up.

24. 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 regionof one rail of the track, a truck to run on the track, a support for the motive apparatus pivoted on said truck toswing'transv'ersely of the track, said support being also slidable on said truck transversely of the track, a segment carried slidably with said support, means carried therewith to engage with various parts of the segment and hold the support stationary at various inclinations, transfer wheels mounted on saidsupport, means to hold said support against its 1 slidable movement on said truck in various positions transversely of the track, said truck comprising frame bars on which said support has its slidable movement, and looking means comprising a member pivoted on said support and engaging under one of said. frame bars to hold said support in raised position and hold the transfer wheels down and hold the truck up.

25. 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, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, said support being also slidable on said truck transversely of the track, a segment carried slidably with said support, means carried therewith to engage f with various parts of the segment and hold paratus axially to a track part in the region of one rail of the track, a truck to run on the track, a supportforthe motive apparatus pivoted on said truck to swing transversely of the track, said support being also slidable on said truck transversely of the track, a segment carried with said support, means carried therewith to engage with various parts of the segment and hold the support stationary at various inclina-- tions, and means to hold said support against its slidable movement on said truck in various positions transversely of the track, and means for adjusting said motive apparatus up and down on said support. v

27. 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, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, said truck having a part movable transversely 'of the track upon which said support is pivoted, means for holding this part against its transverse movement in various positions transversely of the track, and means carried by the sliding part along with the support to hold said support in various inclined positions.

28. In a track grindin machine, motive apparatus, and a grindlng wheel rotated thereby and applied with the motive apparatus axi'ally to a track part in the region of one rail of the track, a truck to run on the track, a support for the motive apparatus pivoted on said truck to swing transversely of the track, said truck having a part movable transversely of the track upon which said support is pivoted, means for holding this part against its transverse movement in various positions transversely of the track, a segmental rack, fixed on this sliding part, a pinion meshing with said rack and carried by the support, for rotating said pinion, and means for prevent ing rotation of said pinion.

29. 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, truck wheels bearing on the respective rails of the track-forwardly and rearwardly of the frame bars, projections on the frame bars, axles carried in these projections and extending transversely of the track, one of the track wheels, at the side of the track adjacent to the motive apparatus and grinding wheel being fixed to its axle, means acting on this axle to feed the machine along the track, the track wheels bearing on the parts at the other side of the track being loose on their axles, and a bar joining the projections at this side of the track, said projections and bar being adjustable transversely of the track along the frame bars, and the projections flanking the respective wheels to move them transversely of the track, a hinge bar joining the frame bars from front to rear and slidable transversely upon them, a support for the motive apparatus pivoted on said hinge bar to swing transversely of the track, means carried by said hinge bar for adjusting the inclination of said swinging support, a beam joining said hinge bars from front to rear and fixed to them, said beam having an opening, a threaded rod connected to said hinge bar and extending transversely of the track loosely through said beam in the region of its opening, and means threaded on said rod within said opening and held against movement transversely of the track by the sides of the opening.

30. 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 rear wardly and extending transversely of the track, truck wheels bearing on the respective rails of the track forwardly and rearwardly of the. frame bars, projections on the frame bars, axles carried in these projections and extending transversely of the track, one of the track wheels, at the side of the track adjacent to the motive apparatus and grinding wheel being fixed to its axle, means acting on this axle to feed the machine along the track, the track wheels bearing on the parts at the other side of the track being loose on their axles, and a bar joining the projections at this side of the track, said projections and bar being adjustable transversely of the track along the frame bars, and the projections fianklng the respective wheels to move them transversely of the track, a hinge bar joining the frame bars from front to rear and slidable transversely upon them, a support for the motive apparatus pivoted on said hinge bar to swing transversely of the track, means carried by said hinge bar for adjusting the inclination of said swinging support, a beam joining said hinge bars from front to rear and fixed to them, said beam having an opening, a threaded rod connected to said hinge bar and extending transversely of the track loosely through said beam in the region of its opening, and means threaded on said rod within said opening and held against movement transversely of the track by the sides of the opening, and means for adjusting said motive apparatus up and down in 11 said swinging support.

FRANK J. VENNING.

Witnesses:

JAMES N. RAMsEY, IRENE PARKER.

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