US1213350A - Track-drilling machine. - Google Patents

Description

C. E. GIERDING & l. R. BROWN.

TRACK DRILLING MACHINE.

APPLICATION FILED FEB. 20. m4.

Patented Jan. 23, 1917.

TSHEETSSHEET'L C. E. GIERDING & J. R. BROWN.

TRACK DRILLING MACHINE.

APPLICATION FILED FEB. 20. 1914.

1,2135350. Patented Jan. 23,1917.

1 SHEETSSHEET 2.

I. IIIIIJIIIII I IIII II Q C. 'E.'G|ERD|NG & J. R. BROWN. TRACK DRILLING MACHINE.

APPLICATION FILED FEB-20.1914. 7 1,213,350. Patented Jan. 23,1917.

7 SHEETS-SHEET 3.

' i? 565. flaw/2573):

G/zarles fiac'ercddizg "Grunt/4o WASNINGYDN. n. c.

or E. GIERDING &1. R. BROWN.

TRACK DRILLING MACHINE.

APPLICATION FILED FEB. 20. IBM.

Patented Jan. 23, 1917.

ISHEETS-SHEET 4.

C. E. GIERDING &J. R. BROWN.

TRACK DRILLING MACHINE.

APPLICATION FILED FEB. 20. 1914.

1,213,350. Patented Jan. 23,1917.

7 SHEETS-SHEET 5.

Ii im C. E. GIERDING 6L1. R. BROWN.

TRACK DRILLING MACHINE.

APPLICATION FILED FEB. 20. 1914.

1,213,350. Patented Jan. 23,1917.

ISHEETS-SHEET 6.

.4 "Illilllllll lllll lllln Y nmwm' u lllilllllflk lllll i MM lylglmmz i l /Z 5 5-' 1 1 Jim/Z575 Chev/ e5 I ate/"@229 c, E. GIERDlNG ca J. R. BROWN.

TRACK DRILLING MACHINE.

APPLICATION FILED FEBWZO, 1914.

1 ,21 3,350. Patented Jan. 1917.

ISHEETSSHEET 7.

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CHARLES E. GIERDING AND JOHN EO'WLAND BROWN, 0F MANSFIELD, OHIO, ASSIGNORS TO THE OHIO BRASS COMPANY, OF MANSFIELD, OHIO.

TRACK-DRILLING MACHINE.

Application filed February 20, 1914-.

' 0 all whom it may concern Be it known that we, Gnannns E. Gra n)- ING and Joi-IN ROWLAND BROWN, citizens of the United States, residing at Mansfield, in the county of Richland and State of Ohio, have invented certain new and useful Improvements in T rack-Drilling lvlachines, of which the following is a specification.

Our invention relates to drilling, boring machines, and the like, and more particularly to machines of this character for drilling or milling bond holes in railroad rails.

One of the objects of our invention is to provide a machine of this character which will be simple, durable and reliable in construction, and effective and efficient in operation.

Other objects of our invention will appear hereinafter.

Referring to the accompanying drawings, Figure 1 is a plan view of a track or rail drilling machine embodying our invention. Fig. 2 is a view in side elevation thereof. Figs. 3 and 3, when placed end to end, constitute an enlarged vertical longitudinal section taken on line X-X of Fig. 1. Fig. 4: is an enlarged vertical transverse section taken on the line 4st of Fig. 2. Fig. 5 is a transverse vertical section of the feeding mechanism on line 55 of Fig. 3. Fig. 6 is a plan view, the top of the gear box being removed, on the line 6-6 of Fig. 5. is a vertical transverse section on line 7-7 of Figs. 1 and 3*. Fig. 8 is an enlarged longitudinal section of one of the drill spindles, taken on the line 88 of Fig. 7, and Fig. 9 is av transverse section through a portion of the ball of a rail showing one type of bond hole.

The particular machine shown in. the drawings, which is an embodiment of our invention, is designed more particularly for drilling or milling bond holes in railroad rails, which are represented at A and A in Figs. 1 and 2, and the machine is so adjusted that it will drill holes in the outer face of the ball of the rail. The drills B (see particularly Figs. 8 and 9) in the structure shown are preferably in the form of hollow milling cutters so that they drill a hole B in the ball of the rail, leaving a pin or integral part B of the rail in the center of the hole B. t is obvious, however, that any suitable or desired type of drill may be used for this purpose. In bonding rails the Specification of Letters Patent.

Fig. 7

Patented J an. 23, 1917.

Serial No. 819,876.

holes for the bonds are usually provided on each side of the abutting ends of adjacent rails, and in order to save time in practice we provide a machine by means of which two holes may be simultaneously drilled, one on each side of the joint in the rail. These drills in the structure shown are properly spaced apart and are simultaneously actuated by the mechanism which we will describe. The machine shown in the drawings is arranged so that it will travel along the rail in order that it may be quickly transported from one rail joint to the next along the line. The machine preferably spans the rails, forming a track, and is preferably provided with rollers or wheels C and 1). Accordingly we provide a frame which spans the track and which, at one side, projects beyond the rail and supports the drills and the actuating mechanism therefor. The

other parts of the mechanism are supported by this frame between the two rails so as to produce a balanced structure. This frame in general has two parallel bars or members 1 which are spaced apart and which are joined at their inner ends by a rigid yoke 2. From this yoke extends a bar or beam 3 one end of which, as seen more clearly in Fig. 3,

is threaded into the yoke 2 and the other end of which serves as an axle for the supporting wheel C which runs upon the rail A this wheel being properly held in position on said member 3 by means of two collars 4, as shown clearly in Figs. 1 and 2. The outer ends of the parallel side members 1 of the frame terminate in integral L-shaped blocks 8 (Figs. 3 and 4-) of rectangular section.

.The horizontal legs or portions of these blocks lie substantially above the rail A, and

the vertical legs or portions thereof depend or extend downwardly alongside the rail. So much of the frame as has just been described lie's practically entirely above the rails and carries the driving and feeding mechanism and other parts.

As before mentioned, this machine is designed to drill the bond holes in the outer face of the ball of one of the rails, the rail A, and in consequence the drills are positioned on the outside of the track preferably to move horizontally toward and from the ball of the rail A. For this reason we provide the frame with two other or additional parallel bars or members 9 which project beyond the rail A and which are preferably spaced apart substantially the same distance as the frame members 1. The inner ends (see Figs. 1 and are formed integrally with the vertical. legs of the L-shaped blocks 8. and their outer ends are bridged by a yoke 10. This yoke may, if desired, be provided with handles 11 to enable the machine to be easily and conveniently handled when lifting it on or off the tracks. Since the frame or extension members 9 project from the lower portions of the L-shaped blocks the plane in which they lie is positioned below the plane of the frame members 1, thus making it convenient for positioning the drills down into operating position and make a iore compact and balanced structure. It is thus seen that the members 1 and 9 and the yokes 2 and 10 form a solid compact and unitary frame structure for supporting the other parts of the machine. This frame is further reinforced and strengthened by the bridge or cross membe 8 which is fastened to the L-shaped blocks by bolts 8 On these outstanding members 9 of the frame we provide a bridge 12, which for convenience of description. we will hereafter designate as the drill frame and which is arranged to carry the drills and driving gears therefor. This drill frame is arranged to reciprocate or slide in a horizontal plane toward and from the face of the ball of the rail A, and for this purpose the drill frame has elongated sleeve bearin s 13 which embrace the frame members 9 and which slide thereon (Figs. 1 and 2). The drill frame also has a central elongated bearing 1% which is positioned somewhat above the plane of the tops of the rails and which supports the main driving and feeding shaft 15 (Figs. 3 and 7). This bearing ll. as shown. has an inner bearing sleeve 16 which is removable and which has an annular groove 17 and holes 18 for carrying a lubricant from the oil cup 19 to the shaft. This main shaft 15 is retained against longitudinal movement in the bearing 1% by means of a collar 20 which is fastened to the shaft at the inner end of the bearing. Beyond the outer end of the bearing 14c the shaft carries a spur gear 21 which is keyed thereto and which is also held in place by a clamping nut 22 screwed on. to the threaded outer end of the shaft 15. This shaft. 15 is not only arranged to drive the drills but it is also arranged to be shifted longitudinally to feed the drills into the rail and to withdraw them therefrom. as will be later explained. and we therefore arrange the parts so that the longitudinal movement of the main shaft 15 will shiftthe entire drill frame and the parts supported thereby. In order to take up the thrust exerted on the bearing 1st by the shaft incident to the drilling operations we interpose an auxiliary bearing 23' on the shaft between the outer end of the bearing 14 and the gear 21. This auxiliary bearing is preferably in the form of a ball or roller bearing, as clearly shown in Fig. 3, so as to be better adapted for taking up the thrust. The gear 21 drives two smaller pinion gears 2% (Figs. 3, 7 and 8) which are keyed to the outer ends of the drill. spindles and which are also held in position thereon by the nuts 2 threaded on the ends of the drill spindles 25. These drill. spindles are supported in suitable bearings 27 formed in the sliding drill frame. These bearings, as in the case of the bearing ll. have removable bearing sleeves 28 and oiling passages 29 and 30 which are fed from the oil cups 31 through the passages It will be noted that the drill spindles are supported in the drill frame and in a horizontal plane which is properly positioned with respect to the outer face of the ball of rail A, and furthermore, these spindles are parallel and are preferably spaced apart the. distance at which the holes in the abutting rails are to be drilled. he inner ends of these spindles are enlarged in diameter to form drill-holding chucks or heads (Fig. 8). The inner ends of the spindle bearings 27 are correspond ingly enlarged to form sockets in which the drill heads or chucks may rotate. Since the thrust on the drills and spindles is necessarily considerable, due to the drilling op erations. we interpose thrust bearings between the chucks 33 and the shoulders 36 formed by enlarging the inner ends of the bearings 2?. These thrust bearings are preferably in the form of ball or roller bearings, as clearly shown, which are found to be best adapted to the purpose. It will thus be seen that the s 'iindlesare held against longitudinal movement in their bearings 27 by means of the thrust bearings at one end and the gears and clamping nuts 24 and 26, respectively. at the other end.

The chucks or drill heads have central sockets or bores 37 into which the milling 119 cutters or drills B are inserted, said drills being. if desired, firmly held against rotation in said. chucks by means of the set screws or bolts 38. The drills project beyond the noses of the chucks the desired distance and in order that a very accurate adjustment of these drills may be made we make the drill spindles hollow and provide slidable rods therein. The interiors of these. hollow spindles are somewhat enlarged at their outer end portions and are threaded to receive correspondingly threaded adjusting bolts or screws 40 which have sockets 41 in their inner ends for receiving the outer ends of the-adjusting rods 89. The inner ends of the adjusting rods 39 (Fig. 8) bear against the ends of the drills B and consequently by screwing the adjusting bolts 10 into the end portions of the spindles the drills may be forced to project any distance between the 'noses of the chucks that is desired. This adjustment which we have just described enables the operator to accurately position the drills so that they will both commence drilling simultaneously and will drill holes of the same depth. It also has the advantage that it enables the drills to be adjusted while the machine is in position and the adjusting bolts lO are in a position where access may be readily gained thereto without disturbing the position of the machine. In order to prevent the dirt and grit from entering the gears on the drill frame and thereby interfering 'ith their operation, we prefer to inclose these gears in a suitable housing or box which may be fastened in any desired manner on the drill frame. This housing is vertically divided into two sections which are held together by the bolts 44E thereby permitting access to be gained to the gears whenever desired. An oil cup so may be provided for each of the thrust bearings of the drill spindles, as shown in Fig. 8.

In the machine which we have shown in the drawings any suitable power may be em ployed for operating the drills. lVe prefer to use an electric motor for this purpose, particularly when a source of electric current is available such as in cases where the machine is used for drilling the rails of an electric railway system. It is obvious, however. that hand power mechanism may be employed, if desired, and in fact such a form of mechanism constitutes subject matter of the copending application Serial No. 821 185el' filed March 191%, by Charles 11 Gierding. We show in connection with the machine herein described an electric motor which may be of any particular type and which is illustrated generally and referred to by the letter E (Figs. 1, 2, 3 and This motor E is mounted on the frame prefcrably between the wheels or rollers which support the machine on the rail. The motor frame E has a suitable base E which is'removably clamped upon a short standard E by means of the bolts E the standard E being preferably formed at the center of the inner yoke 2 of the frame. Rising from the top of the motor frame (Figs. 2 and 4) is a suitable switch F connected to a source of electric current and by means of which the current to the motor may be controlled. This switch may be of any suitable type connected to the overheat trolley wire or third rail system by a flexible conductor F These motor connections. however, need not be particularly described since it is obvious that any suitable means for bringing the current to the motor may be employed.

In the machine shown we have employed mechanical agencies inteposed between the motor and the drill and operating to drive and feed the drills, and we will now describe these parts. The motor drives a spindle or shaft 53 which extends beyond the casing,

extension and which is suitably journaled in said extension.

scribed in so far as it is necessary to renderclear the operation of the drill driving mechanism. The shaft 53 is preferably positioned parallel with and directly above the main shaft 15, heretofore referred to, which shaft 15 (Figs. 8 and'3") extends to a point below the motor. Between said shafts 53 and 15 is a train of gears 56, 57 and 58 for transmitting the power from said shaft 53 to the shaft 15. These gears and the safety mechanism parts are preferably all inclosed in a. housing or casing 59 to protect the operators and to prevent the entrance of grit and dirt to the gears.

The gear 56 is loosely mounted for independent rotation upon. a reduced portion 60 of the shaft which extension extends through and considerably beyond the gear casing or housing 59. The shoulder 61 formed by reducing the diameter of the extension 60 of said shaft holds the gear 56 against longitudinal movement thereon. The face of said gear 56 opposite that face which abuts the shoulder 61 has a series of tapered teeth 62 which mesh 'with corre- .ponding teeth on the end of a sleeve 63 mounted on said shaft extension 60 (Fig. This sleeve as is clearly seen, is keyed at (34 to rotate with said shaft extension 60 but to slide longitudinally thereon, and it is held in yielding engagement with the teeth of the gear 56 by means of a coiled spring 65 surrounding said shaft extension 60 and abutting at one end against the sleeve (33. The outer end of the spring abuts against a collar (36 on the outer end of said shaft extension and this collar may be shifted along said shaft extension and fastened in its adjusted position by means of a set screw 67 whereby the pressure with which the sleeve 63 engages the gear teeth 62 may be regulated. It will thus be seen that the rotation of said gear 56 is imparted to it from the shaft 53 through the sleeve 63 of said safety niechanisnn and the corresponding teeth 62 on the gear and sleeve are so formed that in the event the drills or any of the parts which the gear 56 drives become struck or overloadedin any manner the spring 65 will permit the teeth of the gear 56 and sleeve 63 to slip relatively to each other. In this manner damage to the parts will be avoided. The gear housing 59 is divided into two sections on a transverse vertical line 68 (Figs. 2; 3 and a) so that access may be readily gained to the parts inclosed thereby for inspection and repair. The upper portion of This shaft 53 carries at its outer end portion a safety mechanism:

said casing is also divided on a horizontal line 69 so as to form a removable cap at the upper end thereof. The purpose of this construction is to permit the motor and safety mechanism to be removed or replaced as a unit with respect to the rest of the parts. This is obvious because the safety mechanism is mounted upon the shaft and is thereby removable with said shaft. The gear casing 59 is provided. as is shown, with a hole or opening '70 for the sleeve (33, and it is also provided with a hole or opening 71 for the extension of the motor gear casing 54. The inner edge of the opening 71 and the periphery of the end portion of the extension are carefully machined so that the end of the extension will fit snugly in said opening fl and thereby serve to hold the extension and the motor against any relative movement. The gear 57. which is driven by the gear 56, is mounted on a suitable shaft suitably mounted in the walls of the gear housing 59 and said gear 57 is somewhat larger in diameter than the gear 56 so that said gear will be driven at reduced speed. The gear 57 meshes with and drives the gear 58 which is mounted upon the main shaft 15, which shaft passes entirely through said gear housing 59 but has suitable journals in the walls thereof. It is through the mechanism just described that the power of the motor is transmitted to the main shaft 15 for the purpose of driving said shaft, and hence driving the gears as heretofore explained. It will be remembered, however, that the feeding of the drills into the rail and the withdrawal thereof is accomplished by shift ing the main shaft 15 longitudinally, and in consequence the gear 58 is splined, by means of the key '73 and key-i Tl. so that it will not only drive the t 15 but will permit said shaft to be shifted longitudinally.

A bridge or yoke member 80 spans the members 1 of the frame and is positioned between the yoke 2 of the frame and the gear housing 59 1. 2, 5 and G). This bridge is supported by the side members 1 of the frame which, as shown more clearly in i s. 5 and 6, passes through the ends of the olte or bridge. The bridge 80 is fastened in position on said frame members by means of the pins 81 so that it remains fixed with respect to the frame. The bridge 80 is preferably in the form of two parallel members spaced apart so as to provide room therebetween for a number of gears, closed at the top by a cap and at its'lower side by a cap or cover 83 to completely inc-lose the parts and protect the op erator as well as to protect the gears from grit and dirt. The main shaft 15 passes en tirely through this bridge 80 and has a journal bearing 8d therein. This shaft carries two gears 85 and 86. One of these gears,

the gear 85, is splined to the shaft 15 by means of the key 87 and key-way 74; which extends clear to the inner end of the shaft, so that said gear will rotate with the shaft but will permit the shaft to slide longitudinally relatively thereto. The other gear, the gear St), has an integral extension 88 which is journaled to rotate in a bearing 8!) formed in one of the side members of the bridge 80, as clearly shmvn in Fig. 3. This gear 86 is also threaded on the shaft 15 which, as shown in Fig. 3, is correspondingly threaded at its end portion so that if the gear 86 and shaft rotate relatively to each other the shaft will travel longitudinally relatively to the gear. The extension 88 of gear 86 extends beyond the bridge and is arranged in the form of a hand wheel 88 which rotates with the gear.

A. pair of companion gears 90, 91 are arranged within the bridge member 80 and mesh with the gears 85 and 86, respectively.- The gears 90 and 91 are carried upon a shaft and said gears are fastened together by means of the pins so that they 'ill always rotate together. The size of these four gears is so proportioned that when the sha 15 rotates and drives the gear l 55 the gear 8b will be driven at a slightly greater speed than the shaft. The threads on the shaft and gear 86 are so arranged that this slightly greater speed of rotation of ti e gear 86 relatively to the shaft will cause the shaft to travel. longitudinally in the direction of the arrow Z (Fig. The shifting or moving of the shaft longitudinally in this manner, as before explained, shifts the drill frame and consequently feeds the drills as they are being rotated. 'i 'hese parts are so proportioned that the longitudinal movement of the shaft 15 will be just suliicieut to properly feed the drills into the rail. and it is obvious that the feeding speed of the drills will always be in proportion to the speed of rotation thereof. it may oe well to say at this pointthat in the machine shown the speed ratio between the two gears and 86 is accomplished by making the gear 86 a trifle smaller in diameter than the gear 85 and by making the gea r ill a trifle. larger in diameter than the gear 90, and, of course these differences in diameter vary the number of teeth in the respective gears. It is desirable in a. machine this character, for reasons which are obrrous. to withdraw the drills from the rails in a much quicker period of time than that required for them to penetrate the rails. In the mach iue shown this speed of withdrawal is accomplished. by simply grasping hold of and. stopping the rotation of the hand wheel 88 without stopping or reducing or even changing the speed of the driving mo tor or any of the other parts, and also by removing the gears 90 and 91 from mesh with the gears 85 and 86. By removing or disconnecting the gears 90 and 91 and stopping the gear 86 it will be seen that the gear 80 ill in effect act as a nut on said shaft 15, and the continued rotation of the shaft will cause it to travel longitudinally in a direction opposite to that of the arrow Z (Fig. 3), and the drills will thereby be quickly withdrawn. When the gear 80 is stopped the relative speed of rotation of the shaft 15 is so great that the drills will be very quickly withdrawn. The speed of withdrawal, however, may be varied, if desired, and this variation may be accomplished by restraining the gear 80 so that it will rotate at a lesser speed than the shaft- 15 instead of actually stopping the said gear, and this restraint may be placed upon the gear by simply allowing the hand wheel 88 to slip in the hand.

In order to provioe a convenient means for disconnecting the pair of gears 90 and 91 we mount their shaft 92 in a yoke or U-shaped frame 95 (Figs. 5 and 6) which is pivoted at 96 to the bridge member 80, this yoke being positioned outside of and embracing said bridge member 80. The wall members of the bridge have elongated slots 97 therein to allow for the movement of the gear shaft 92. The gear shifting yoke 95 has an upstanding handle or arm G by which it may be conveniently actuated. e prefer that the four gears be maintained normally in mesh and we therefore provide a spring 98, one end of which is connected to the operating handle G and the other end is anchored to an upstanding post 99 on the bridge 80. The last mentioned end of the spring is connected to a screw threaded member 100 which carries a wing nut 101. and by means of this construction the tension of the spring may be varied. This spring yieldingly holds the set of gears in mesh but is preferably proper-- tioned so that during'the drilling operation the ope 'ator must exert an additional pressure upon the handle G to prevent the gears from slipping. This construction, in a sense, acts as a'safety mechanism for the reason that should the operator leave the machine or forget to throw the gears 90 and 91 out of mesh the gears will slip when the resistance to the feeding operation of the gears becomes too great by reason of hard spots in the rail, or for any other reason. The hand wheel 88 has a number of radial sockets 88 in its periphery into which may be inserted a suitable tool 88 (Fig. 3) for obtaining a greater turning leverage in case the gears become stuck.

The machine shown in the drawings is arranged so that it may be raised and lowered particularly with respect to the rail which is being drilled, and the purpose of this arrangement is to not only permit of a vertical adjustment of the drills with respect to the rail so that the bond holes may be accurately positioned, but also to permit the drilling apparatus to be raised somewhat while the machine is being transported from one location to the next. In this construction the L-shaped blocks or members 8 at the outer ends of the frame members 1, have outstanding ears or lugs 105 which serve as members upon which the wheel-holding levers are pivoted at 106. These levers are preferably in the form of bell-crank levers. The arms 107 of these levers carry the wheels D suitably mounted thereon at their lower ends. The other arm of one of the wheelholding levers extends to a considerable distance upward in the form of a handle or operating arm 108, and the arm 109 of the other lever extends some distance above the pivotal point 106 of said lever. A link member 110 is pivotally connected at 111 to the arm 10'? of one of the bell-crank wheel-holding levers and rises upward and then eX- tends across and above the frame of the machine to the arm 109 of the bell-crank lever on the other side of the machine, to which arm 109 said link 110 is pivotally connected at 112. These parts, as is seen, are so arranged that by swinging the handle 108 to the right in Fig. 4 both bell-crank levers will he swung about their pivots 106 and the wheels D will be brought toward each other, thus lifting or raising the machine off of the rail A, and the machine is then free to be rolled along the track to the next place where bond holes are to be drilled. The link 110 has a curved dog 113 which is pivoted at 11% thereon. The free end of this dog drops in against a corner or shoulder 116 On the bridge 8 when the handle 108 is swung to the right to lift the machine, thus locking the parts against accidental displacement while the machine is moving from one place to another. In order to vertically gage the position of the drill with respect to the rail there is shown a couple of vertically disposed threaded members or bolts 117 which are screwed into correspondingly threaded holes in the L-shaped members 8 and which project below said members. The lower ends of these bolts rest upon the top of the rail A, as shown more clearly Fig. 3 and by manipulating these adjusting screws the machine may be adjusted vertically, as desired. The heads of these bolts have transverse pins or arms 118 forming handles by which these screws may be conveniently manipulated.

A convenient depth gage such, for in stance. as we have shown more particularly in Figs. 1, 3 and a of the drawings, may be provided for determining the depth to which the drills penetrate the rails. The bridge member 8 is curved upwardly at its top center portion (Fig. 4-) so as to pass over the main shaft 15, Upon this upper curved portion is a fiat plate 120 which lies parallel with the main shaft 15 and directly above it and which may be clamped in place upon the bridge 8 by a winged nut 121 and threaded bolt 122, the plate 120 having an elongated slot to allow for its longitudinal adjustment with respect to the bolt 122. ()no end 123 of this plate drops downwardly to a point adjacent the periphery of a circular collar or gage member 1% which is mounted on the main shaft 15. This collar may, if desired, also be adjusted along the shaft 15 and held in its adjusted position by means of the set screw 11-5. It will be remembered that the shaft 15 moves longitudinally to feed the drills into the rail, and it will thus be seen that the relative movement of the collar 12% on the shaft with re spect to the end 123 of the gage plate 120 serves to indicate the depth to which the drills penetrate the rail. This gage arrangement is on the upper part of the machine so that it may be clearly seen at all times by the operator and may be conveniently set by him. The L-shaped members 8, as before explained, extend down alongside of and bear against the face of the rail ball which is being drilled. These portions of the frame operate in conjunction with members 7 to form rail clamps for clamping the machine to the rail to prevent relative movement of the machine with respect to the rail during the drilling operations. The members 7 are positioned on the side of the rail opposite to that which is being drilled and are mounted to slide on the side members 1 of the frame. The clamping force required for the purpose is obtained by means of the nuts 6 which operate on the threaded portions 5 of the frame members 1. The clamping faces of the L-shaped members and the members 7 have hardened steel gripping plates 131 thereon, and the upper ends 7* of the members 7 project over and slide on the L-shaped members 8 so as to take the twisting thrust on the members 7 incident to the clamping operations.

In connection with a machine of this character it is often desirable to carry tools and supplies of various kinds, and if desired, a suitable box or receptacle T may be mounted in place on the machine. such, for instance, as shown in Figs. 1 and 2, the tool box being mounted on the member 8 'of the frame.

What we claim is:

1. The combination with aframe, of a drill frame movable thereon, a drill carried by the drill frame, means having a portion fixed in the first named frame and having driving means for the said drill and for bodily moving the said drill frame continuously to feed the drill.

2. The combination with a frame, of a drill frame movable thereon, a drill carried by said drill frame, a shaft for moving the drill frame to feed the drill, driving means comprising parts mounted on the first mentioned frame for rotating said shaft, and means for bodily moving the shaft and the drill. frame to feed the drill.

3. The combination with a. frame, of a drill frame movable thereon, drilling means carried by said drill frame, and means having a. portion mounted on the first named frame for driving said drilling means and for continuously shifting said drill fame, said means enibodying a common connection for said drill frame and said drilling means I between them and the said driving means.

f. The combination with a frame, of a drill frame movable thereon, drilling means having parts carried bodily by said drill frame, a common shaft for shifting the drill frame continuously and for driving the drill, and means on the first mentioned frame for actuating said shaft.

5. The combination with a frame, of a drill-carrying frame mounted thereon, dri ls rotatable in the drill frames, a shaft for shifting the drill frame, driving means on the first named frame for rotating the shaft, and means for automatically shifting said shaft to feed the drill frame and rotate the drills.

6. The combination with a frame, of a drill-carrying frame movable thereon, a common shaft for bodily shifting the drill frame and the drill and for rotating the drill, driving means on the first mentioned frame for rotating the shaft, means for antomatically and bodily shifting the shaft at the same time it is rotated to feed the drill frame and the drill, and means for reversing the direction of the shifting movementof said. shaft to withdraw the drill.

7. The combination with a frame, of a drill frame movable thereon, drilling mechanism carried bodily on said drill frame, a rotatable shaft for driving said drilling mechanism, and means in connection with the shaft for bodily moving it and the said drill frame with respect to the first mentioned frame to continuously feed the drilling mechanism.

8. The combination with a frame. of a. drill frame movable thereon, drilling mechanism bodily carried by the drill frame, a rotatable shaft bodily movable longitudinally with said drill frame, means in connection with the shaft and the first men tioned frame forshifting said drill frame to feed the drilling mechanism when the shaftrotated, and means controlling said shaft shifting means to withdraw the drilling mechanism.

9. The combination with a frame, of a drill frame movable thereon, drilling mechanism carried by the movable frame, drivingmechanism fixed 011 the first mentioned frame, means for shifting said movable drill frame comprising a common shaft actuated by said driving mechanism and shiftable with the drill frame for transmitting power to said drilling mechanism and for bodily moving the said drill frame.

10. The combination of a frame, a drill frame shift-able thereon, drilling mechanism movable with said drill frame to and from the work, a shaft connected to said frame and drilling mechanism, means on said frame for driving said shaft to operate said drilling mechanism, and an automatic feeding mechanism under the control of said shaft for shifting he shaft longitudinally to feed and withdraw said drilling mechanism.

11. The combination of a frame, a drill frame, shiftable thereon, drilling mechanism movable with said drill frame to and from the work, a shaft connected to said frame and drilling mechanism, means operated by said shaft for shifting the shaf longitudinally in one direction to feed the drilling mechanism, and means for reversing the direction of longitudinal movement of said shaft to withdraw said drilling mechanism.

12. The combination with a frame, of drilling mechanism movable thereon, a con"- mon means for driving said drilling mechanism and for bodily moving it with respect to the frame. means in connection with the frame for driving said common means, and feeding mechanism for-actuating said common means in either direction for con tinnouslv shifting the said drilling mechanism.

13. The combination with a frame, of drilling mechanism movable thereon, a common shaft for rotating said drilling mechanism and for bodily shifting it, means fixed to the frame for driving said shaft, feeding mechanism engaged the shaft to bodily shift it and the said drilling mechanism with respect to the frame. and means controllin said feeding mechanism for l ollll l' shifting the shaft to withdraw said drilling mechanism. i

Ll. The combination with a fixed frame, of a constantly rotatable shaft longitudinally movable with respect to the frame, drilling mechanism reciprocable on the frame with said shaft and continuously driven by said shaft, means for reciprocating said shaft in one direction with respect to the frame and while it is rotating for feeding said drilling mechanism, and means for reciprocating said shaft in the other longitudinal direction and while it is rotating in the same direction for withdrawing said drilling mecl. anism.

The combination of a plurality of rotatable drills, and means comprising a shaft common to all of the drills for rotating and antomaticall feeding said drills.

therewith in accordance with its speed of rotation, n'ieans in connection with the first mentioned frame for rotating said shaft, means driven by said shaft for automatically moving the shaft and the drill. frame in one direction to feed the drill, ano means under the control of the operator for shifting the shaft in the other direction to withdraw the drill, the direction of the rotation of the shaft remaining the same.

18. The combination of drilling mechanism, two relatively rotatable and relatively movable members, one of which is adapted to drive said drilling mechanism, and means for rotating said members at relatively different speeds to shift the drilling mechanism to and from the work, said means comi irising gears adapted to mesh with said members and bodily movable laterally with respect thereto into and out of driving engagement.

ll). The combination of drilling mechanism, two members move le relatively to each other for feeding the drilling mechanism-to and withdrawing it from the work, means for rotating said men'ibers at relatively different speeds to move one of said members and feed the drilling mechanism, and means for rotating said members at relatively different speeds for moving one ofsaid members to withdraw said drilling mechanism. said means comprising gears meshing with said members, a shaft parallel with the members on which the gears are mounted, means for bodily moving the shaft laterally to move the gears into and out of driving engagement with said members, and a spring tending to hold the gears in such engagement.

20. The combination of a shaft, means for rotating said shaft, a gear threaded on to the shaft and relatively fixed in position and ith respect to which the shaft travels longitudinally, gears driven by said shaft a1 d adapted to drive said gear at relatively greater speed than the sha-ft for causing the shaft to travel longitudinally in one direction, a hand-wheel connected to said for restricting its speed of rotation to a relatively lesser speed than that of the shaft to cause the shaft to travel longitudinally in the other direction, and means for moving said driven gears laterally out of engagement with said gear to permit the speed of rotation of said gear to be, re-

stricted.

21. The combination of a shaft, means for rotating said shaft, a gear threaded on to the shaft and with respect to which the shaft travels longitudinally, gears driven by said shaft and adapted to drive said gear at relatively greater speed than the shaft for causing the shaft to travel longitudinally in one direction, a hand-wheel connected to said gear for restricting its sp *ed of rotation to a relatively lesser speed than that of the shaft to cause the shaft to travel longitudinally in the other direction, means for disconnecting said driving gears to permit the speed of rotation of said gear to be restricted, a frame supporting said shaft, a. drill driven said shaft, and a drill frameearr xing said drill and shiftable with said snaft.

22. The combination of a frame adapted to span a pair of rails of a track and having a portion projecting laterally beyond the track, a shaft mounted on said frame and projecting adjacent the projecting portion of said frame. driving means for said shaft mounted upon said frame and positioned between the rails. means driven bv said shaft for shifting the shaft longitudinally in either direction, a drill frame mounted on the projecting portion of theother frame and adapted to he reeiprocated with respect to the other frame by the longitudinal. movement of said shaft, and a drill *arried by said drill frame and adapted to be driven by said shaft.

The combination of a frame adapted to span a pair of rails of a track and having a portion projecting laterally beyond the track, a shaft mounted on said frame and projecting adjacent the projectingportion of said frame. driving means for said shaft mounted upon said frame and positioned between the rails, means drivenbv said shaft for shifting the shaft loi'igitinlinallv i either direction, a drill frame mounted on the projecting portion of the other frame gitudinal movement of said shaft, a pluralit; of drills spaced apart and carried by said drill frame, and common means carried by said drill frame and connected with said shaft for driving said drills simultaneously.

in a track drilling machine, the combination of a frame adapted to span a pair of rails of a track and having a portion projecting later-all beyond the track, a drill frame mounted on the projecting portion of the other frame, a shaft mounted on the first named frame adapted to reciprocate the drill frame with respect to the bination with a frame adapted to be fixed on the rails of a track which is to be drilled, of a drill frame reciproeable transversely of the other frame, drilling mechanism mounted on and movable with the drill frame, driving means mounted on the other frame. a driving shaft connected with the j said driving means and longitudinally movable to operate the drilling mechanism and to reeipremte the drill. frame by its rotation, and a gage mounted on the first mentioned fixed it 'aine having a pointer extend ing adjacent one of the moving parts of the movable (ll'lll fran'ie for determining the depth to which the drilling mechanism penetrates the rail.

In testimony whereof we have signed our names to this specification, in the presence of we subscribing witnesses, on this 13 day of Februarv, A. D. 191st.

CHARL 18 E. GIERDINJ. JOHN KO VLAND BROYVN.

Y 'Tritnesses:

O. S. Conny.

Copies of this patent may be obtained for five tents each. by addressing the Commissioner of Patents,

Washington, D. C.

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