US1807367A

US1807367A - Railway bolt tightener

Info

Publication number: US1807367A
Application number: US336296A
Authority: US
Inventors: Horace E Woolery
Original assignee: WOOLERY MACHINE Co
Current assignee: WOOLERY MACHINE Co
Priority date: 1929-01-30
Filing date: 1929-01-30
Publication date: 1931-05-26
Anticipated expiration: 1948-05-26

Description

May/,26, 1931. H. E; woLERY 1,307,357

mLwAY BOLT TIGHTENER Filed Jan. 30. 1929 Y8 Sheets-Shui 2 ATTURNEYSM f May 1931.-

H. E. wooLERY i RAILWAY BOLT TIGHTEN'R "XFiled Jan. 5o. 1929 8 Sheets-Sheet 3 INVENTOR. Honnef. EWaoLlERYl AT'ToRNEYs.

May 26, 1931. H. E. wooLERY RAILWAY BOLT TIGHTENER Filed Jan. 30. 1929 8 Sheets-Sheet 4 Hon/c5 E. WooLERY L mvENToR BY Z 2 ATTORNEY ,o .MM \m, (Y ,..n w. ,L mm M *www ,w v n E b l mum hah* hm mi? wn Nm ma. No. mm. @.7 'm om Nw u@ Ouv May 26, 1931. H, EI wQQLEr-Y 1,8()75367 RAILWAY BOLT TIGHTENER Filed Jan. 30. 1929 8 SheetS-Sheet 5 INVENTOR HORACE .E VVooLERY BYQM ATTORNEY May 26, 1931. y H. E. wooLERY 1,807,367

RAILWAY BOLT TIGHTENEX Filed Jan. 30, 1929 8 Sheets-Sheet 6 INVENTOR HORACE E'. WOOLERY ATTORNEY May-.26, '19'31". H. awooLERY RAILWAY BOLT TIGHTENER Filed Jan. so. 1929 a sheets-sheet fr INVENTOR. V/rorfvct E. WooLaRY A TTORNEYS.

-1 Maryv 26, 1931.

H. E. WQLERY mwm BOLT L'IJIGHTFNER Filed' Jan. 30, 1929 8 Sheets-Singt 8 ATTORNEY Patented May 26, 1931 UNITED lSTATES PATENT OFFICE HORACE E. WOOLERY, OF ST. PAUL, MINNESOTA, ASSIGNOR TO WOOLERY EACHINE COMPANY, OF MINNEAPOLIS, MINNESOTA1 A. CORPORATION 0F MINNESOTA RAILWAY BOLT TIGHTENER application med January so, 1929. serial No. 336,296.

. This invention relates to bolt tighteners for railway rails, and the primary object is to provide a portable, power operated machine that can be quickly and easily mounted on and dismounted from the rails, and which can readily be moved longitudinally on the rails so as to be successively shiftable from one rail joint to another where it is to be stationed for operation upon the bolts and nuts which secure the connecting or tie plates to the adjoining rail ends. A further'object is to provide a machine of a novel, eiiicient, and ractical nature, for selectively tightening t e nut on the bolt or releasing it therefrom, and which machine is so constructed that it will readily adjust itself to its work regardless of which side of the rail the head or nut ends of the bolt may project. A further object is to provide a bolt tightener in which the tightening pressure will be automatically released whenit reaches a predetermined degree, so as to insure a uniform holding pressure by each bolt, and so as to prevent an overstrain on and weakening of the bolt b too great a pressure, but in which machine t e operator mayV eect an adjustment to eliminate the automaticpressure release, and provide a positive power drive which may be employed to advantage where, for 1nstancejt is desired to twist off a bolt that has become rusted or frozen, or which for some other reason cannot be removed or adequately tightened. A further object is to provide an improved and novel construction of wrench and supporting and driving mechanism therefor. A further object is to provide a novel and eicient power transmitting mechanism, including speed clutches and drives, for conveying and regulating motive power from an engine, atone end ofthe machine, to the tool or wrench holders that are preferably arranged at or near the otherend of the machine. Further and more specific objects will be disclosed in the course of the following specification, reference being had to the accompanying drawings, wherein Fig. 1 is a side elevation of the machine, as seen from the right, as lowered to its operative position with respect to the rail.

Fig. 2 is a rear view of the machine as seen in Fig. 1.

Fig. 3 is a top or plan view of the machine and the rails and ties upon which it is carried, portions being broken away.

Fig. 4 is a side elevation similar to Fig. 1 but showing the machine in the raised position to which it is adjusted when mov from one location to another. v

Fig. 5 is an `enlarged sectional elevation as seen substantially 'as on the irregular line 5-5 in Fig. 1.

Fig. 6 is a` sectional elevation on the line 6-6 in Fig. 5.

Fig. 7 is a sectional elevation on the line 7--7 in Fig. 5.

Fig. 8 is an enlarged detail plan view of the rearV end of the machine, with various parts broken away andy others in section, for purpose of illustration.

Fig. 9 is a sectional elevation as on the irregular line 9-9 in Fig. 8.

Fig. l0 is an'enlarged sectional plan view on the line 10-10 in ig. 1.

Fig. 11 is a sectional elevation on the line 11-11 in Fig. 10.

Fig. 12 is an end elevation of a power :transmission housing and a certain control lffnechanism, as on the line 12--12 in Fig. 10.

l Fig. 13 is an enlarged detail plan view,

partly in section, of the speed clutches and the automatic pressure release, slip clutch associated therewith.`

Fig. 14 is a sectional elevation of the automatic pressure release mechanism, as on the line 14--14 in Fig. 13.

Fig. 15 is a sectional elevation on the line 15-15 in Fig. 14.

Fig. 16 is a sectional elevation on the line 16-16 in Fig. 14.

Fig. 17 is a sectional elevation on the line 17-17 in Fig. 14.

Referring to the drawings more particularly and by reference characters A and B designate a pair of railway rails that are secured to ties C, by spikes D, in the usual manner. The ends of adjoining rails are connected bylaterally arranged tie plates E,

secured by bolts F, that are usually alter` nately reversed, end for end. The bolts to this end, it may here be noted, I have ro tion ofthe rail vided means, aswill presentl be descri d, for so retaining the bolts in place during the tightening 4o ration. f

The main' ame of my machine consists of a pairl of laterally disposed, longitudinally extending, angle iron beams 20 connected by various parts of the machine, particularly including the engine base 21, cross bars 22, and

a gear and shaft housing 23,".(Figs. 5 and .A tubular shaft. or pipe 24 is attached, transversely, tothe front end'sof the beams 20, and between the beams is provided with a flanged roller which supports theA front end of the machine upon the rail A.

The machine is almost entirely supported by the 'rail (A) on which it is working, and

`must of course bel retained 4in an upright position at such times, and consequently I giveit lateral support from the opposite rail, B, b providlng a frame26hav1ng a roller 27 gbr travelling contact with the rail B. This frame 26 is readily detachable with respect to the main frame and lpreferably comprises a bar 28, receivable in t e pipe 24, and an an lar brace 29 that may be secured in any deslrable manner-further back on the main frame. v

By reference to Figs. 2 and 3 it will be noted that the -machine is so d'esigned that its wei ht while primarily carried on the rail A 1s slightl overbalanced in the direcg so that the stability of the machine will be insured, and yet the weight isso distributed that it is a sim le-matter to uicklytumble theentire mac ine over, as lndicated by dotted lines in Fig. 2, to manually remove it from the tracks, as becomes necessary when clearance must be glven for an, approaching train. To protect the machine from injury, when it is so tumbled 4over, I rovide a pair of rockers 30, one at each en of the main frame, which support the machinewhen it is toppled over.

At what ma for convenience be considered therear end o -the machine, the main frame is supported on a roller 31, that is slidablyand rotatably carried on a shaft 32 secured in the rearwardl projecting arms 33-of a frame G that is pivotally connected to the main frame 20, as at 34. The frame G has an integrally cast, arched cross bar 35 with which is formed a bearing hub 36, the construction and functions of which will presently be set forth. It may. here be noted, however, that when the frame Gis raised, or tilted up as shown in Fig. 4, it raises the entire rear end of the machine, so that it may be moved from one rail joint to another without interference, but when lowered, as shown in Figs. 1, 2, 5, and 9, it is in an operative position with respect to the bolts and nuts to be tightened, and when in this osition the rear horizontal flanges of the rame beams 20 rest upon the forwardly extending arms of the frame G.

Associated with the frame G are a pair of bent levers 37, that are carried on the ends of the'shaft 32and are connected at their forward ends to the beams 20, by short links 38. Upwardl extending arms ofthe levers 37 form soc ets to removably receive the lower ends of' a pair of bars 39, the upper ends of which are connected by a handle in the form of a cross bar 40. The bars 39 are also con nected, at lower points by a cross bar 41 that is releasably engageable with a hook or latch 42 carried upon a post 43, as shown in Fig. 4, and this connection when completed has the elect of holding the rear end of the machine in the raised position there shown, as will more fully presently ap ar.

The post 43 has a soc et at its lower end to fit over the upwardly projecting end of a shaft 44, (Figs. 8 and 9), rotatably secured in the hub 36, and has a sideslot which lits over a laterally projecting key 45, of the shaft 44, and, at its upper end has a hand wheel 46. When the hand wheel 46 is turned in either direction it will corres ondingly oscillate the shaft 44, et it is rea ily detachable with respect to t e shaft, and can be quickly pulled oil?, as would be done when the machine is to be tumbled over; and of course would also be removed to render the machine more compact for purpose of shipping. The bars 39 can similarly be quickly removed from the members 37, and for the same reasons.

When the machinev is in an operative or working position,as shown in Figs. 1 and 3, the frame 39-41 is in a forward, out-of-theway position, so that the operator, standing at the near, has free use of the wheel 46 and is also in an advanta eous position to observe and control the -wor being done. When the machine is to be moved on the rails he then reachesl forward, grasps the handle bar 40, and 4pulls the frame 39 back until the bar 41 snaps under the latch 42. This action, operates through the levers 37 and links 38, to raise the main frame 20 to the position shown in Fig. 4, but the frame G, operates on different centers (i. e., 32 and 34) and consequently the post 43 is tilted back to a lesser degree, as shown.

The function of the post 43 and handwheel 46 is to control or effect a to and fro action as between the device for holding the bolt in place and the Wrench which turns .the nut on or effecting this operation, and its operation,

may be described as follows: A cast frame H `is transversel movable with respectto thev frame G, an yhas a pair of integral, rearwardl extending arms 47 4that slldably engage t e shaft 32, one at each side of the roller 31. In addition to the shaft 32 the frame H is slidably secured with respect to the frame. G by a guide vbar 48,secured in the frame G (see Figs. 1 and 9). The. frame H has a transversel .disposed toothed rack 49 that meshes wit a spur inion 50 carried at the lower end of the sha 44. The cast frame H is further provided with a pair of forwardly extending, bifurcated arms 51, to which are pivotally secured, as at 52, a pair of keeper levers 53. These levers are provided, at their outer or swinging ends, with concave heads 531 for enga ement with the bolt he'ads. Only one of these eepers is of course used at a time, as the nut wrench operates at the other side of the railand consequentl they may selec-V tively be let down and raise depending upon which one is required for use. The pivot ends of the keeper levers are provided with lug portions 54 which, when the head ends of the levers are dropped down, stop a ainst shoulders 55 of the frame H so that the eads 531 will not drop below the level of the bolt heads. y v

The nut wrenches 56, later to be described, and of whichthere are two, one at each side of the rail, are not transversely movable with respect to the main frame of the machine, but are applied to and removed from the nuts by v a transverse shifting ofthe entire rear end of the machine which swings from the point of contact between the front roller support 25 and the rail. This shifting is eifected 1n conjunction with the a plication of the kee r levers 53 to the bolt heads, as follows: Ven a bolt is to be tightened, released, or removed, the machine is first moved to the proper position on the rail, and is then lowered with the wrenches in the neutral or inactive ositions as shown in Fig. 5. Ifk the head of t e bolt is at the left then the left hand keeper lever 53 is dropped down. The hand wheel 46 is now turned to the left or in an anti-clockwise direction, which action, operating through the rack 49 and pinion 50, causes the frames G and H to effect engagements at the opposite ends of the bolt. Thus the head 531 is pressed in a right hand direction against the bolt head; and the frame G, carrying the main ,frame 20 with it, moves to the left, the shaft 32 sliding through the roller 31 and arms 47, until the right hand wrench 56 is brought into complete engagement with the nut F2. In a similar manner a bolt with its hea-d at the right may be operated on by employing the right'hand keeper 53 and the left hand wrench 56, in which event the hand wheel 46 would be turned to the right, but in either event it roller bearin will be noted that the opposed pressures, by the keeper and wrench 1n use, are equallzed and are readily applied and removed. When the work on a bolt is completed the main frame should be restored to the central or inactive position before moved on to thenext bolt..

As shown particularly in Figs. 5, 8, and 9, the wrenches have enlarged socket forming heads for engagement wit the nuts, and these heads are carried on Shanks 57 thatare rotatably secured in dependin legs or portions 58 of the housing 23. Tie wrench Shanks are releasably secured by pivoted latch members 59 (see Figs. 1, 4, and 8) adapted to slip into annular grooves in the outer ends of the Shanks. The Shanks 57 are provided, intermediate their ends, with uared sections 60, adapted to fitin and be drlven by respective (

pinions

61 and 62. The pinion 61' (Fi 5 an 6) operates in the lower end of the rig t -housing leg 58, and is the lowest of a train of four pinions, 61, 63, 64, and 65, the last of which is keyed on a transversely disposed shaft 66. The pinion 62, operating the opposite wrench 56, is driven lby the shaft 66, through but two

pinions

67 and 68. Thus, the direction of rotation of the wrenches is reversed, so that with the shaft 66 turning in a redetermined direction both wrenches wille rotating in either right hand or left hand directions with res ect to the nuts with which they are respective yengageable. It ma here be noted that with possibly slight mo ifications in the machine the wrenches 56 may be substituted by drills, reamers, and other tools, and to that extent I anticipate a broaderuse of the machine than solely for the' purpose of operating on bolts and nuts, and I therefore do not herein confine myself to such limited use.

The shaft 66 is driven by a worm gear 69, on onev end of the shaft, that is suitably housed in a, portion of the casin 23. This gear meshes with and is in turn riven by n. worm 70 onthe rear end.of a suitably journaled shaft 71, said worm being housed within a casing 72 secured. on the housing 23.

The shaft 71 is preferably journaled in 73 and 74, (see Fig. 10), and in a bearing head 75, extending up from the main frame 20. At its forward end the shaft 71 has a sprocket pinion 76, that is keyed thereto, and is driven by a sprocket chain 77 (see Fig. 11) from a sprocket gear 78, secured on a clutch member 79. Rotatable on an intermediate portion of the shaft -able clutch member 83 that is keyed to the` shaft 71 and is reciprocated by a shipper lever 84 having a bifurcated end or fork that operates between a collar V85 fixed on the member 83 and a collar 86 that is spring held against the shipper by a spring 87. Thus when the shipper 84 is moved forward (i. e., to the right as seen in Fig. 10) it will positively disengage the complementing clutch teeth 88; and when moved rearwardly will reengage the clutch although the spring 87 will permit the shipper to move rearwardly even if the clutch teeth 88 do not immediately engage each other. The shipper lever 84 is trunnioned on a shaft 89 that has 'limited reciprocating and oscillating movements in bearings 90. In a center opening of the shipper 84 is an opening in which a collar 91 is located and is rigid with the shaft 89. Thus, when the shaft 89 is moved back and forth it will correspondingly actuate the shipper, but the latter will in no way be influenced by oscilla-tions of the shaft 89 and collar 91.

The shipper 84 is provided with a second fork 92 operating in a groove 93 between two inner integrally formed

clutch members

94 and 95, that respectively co-operate with the outer

clutch members

79 and 82. The

clutch hub 94-95 is slidably .keyed upon a power shaft 96 upon which thel

clutch members

79 and 82 are rotatable. It will thus be seen that when the shipper 84 is moved a0 forwardly, and the power shaft 96 is running, the

clutch members

79 and 94 will be closed thus causing the'gear 78 to drive the pinion 76 and sha f.' 71 at a relatively high speed. When a lower speed is desired the shipper 84A is pulled backward, to disengage the clutch 79-94, and this movement effects a. closing of the two clutches 88 and 82-95. The relatively small pinion 81 then causes a slower action or motion of the gear and shaft 71.

The rear end of the shaft 89 is pivotally secured, as at 97 to a head lever 98 mounted in a bracket 99 having a T-shaped slot 100. The lower end of the lever 98 is slidably supported in a transverse'channel portion 101 of the bracket 99. When the hand lever 98 is now pulled back, to the rear end of the notch 100, it operates through the shipper lever 84 to complete the low speed drive connection between the

shafts

96 and 71, and, to effect the high speed drive connection it is only necessary to push the hand lever 98 to its extreme forward position. In this manner the shaft 96, driven bythe engine in a manner presently to be described, imparts a right hand or screwing on rotation to the wrenches 56 after one of them has of Course first been applied to a nut. The degree of pressure or power required to properly screw -home a nut course very high, and consequently the operating wrench has a very tight rotatable contact .with the fully secured nut; in fact this contact or grip is so great that the wrench cannot be removed from the nut until it has first been released by a slight back or left hand action of the wrench. Merely releasing the power is not sufficient to release the wrench, due to the locking action of the worm 70 on the gear 69. To overcome this difliculty I provide the collar 91, that is rigid on the shaft 89, with a forked arin 102 (see Figs. 11 and 12) that engages a small plate 103 on the upper end of an inclined squared shaft 104 slidably secured in an inclined, rigid post or standard 105. At its upper end the shaft 104 carries a truncoconical disk 106, which when lifted is adapted to frictionally connect a

pair offriction flanges

107 and 108 on the respective clutch members and 79. The clutch disk 106 is pressed into engagement with the

flanges

107 and 108 by a slight rock or partial rotation of the shaft 89, and this is done by moving the hand lever 98 from its neutral position to the left in the transverse portion of the slot 100. It will now be seen that the power or motion of the ower shaft 96 is reversed to the shaft 71, eing transmitted successively through the

elements

95, 107, 106,108, 79, 78, 77, and 76. The leftward shift of the hand lever 98 is of course only momentary, and as soon as it is seen that the wrench is loose the lever is returned thus dropping the disk 106 out of engagement with the

flanges

107 and 108.

The power transmitting mechanism also includes a device for automatically releasing the power to the wrenches when such power reaches a predetermined degree, thus insuring a uniformity of clamping pressure by each bolt, and preventing an overstrain on or unintentional twisting of the bolt. This device also includes means for optionally rendering it inactive so that a greater than normal amount of power may be applied to the wrenches, as may be desired for instance when a nut is rusted or frozen on the bolt. This device is illustrated particularly in Figs. 13- 17, and may be described as follows:

The forward end of the shaft 96 terminates and rotates in the hub 109 of the fly wheel 110 of the engine or power unit 111. A 'short inner hub 112 is keyed to the shaft 96, while a larger outer hub or annular housing 113 is rigidly secured, as by bolts 114, to the fly wheel 110. The

hubs

112 and 113 are connected by a relatively heavy spring 115 that is always under tension and through which power is transmitted from the engine to the shaft 96. A sleeve 116 extends between the shaft 96 and the hub 113, and has an enlarged end or disk Dortion 117 that engages against the end of the hub 113. This disk 117 is provided with peripheral notches 118, to which a spanner wrench may be applied to turn it, and the disk is releasably locked, with respect to the hub 113 by a pin 119 that may be inserted in any one of a series of annular perforations 120 in the end of the hub 113. The

lll

inner dperiphery of the member 116-117 isprovi ed with a pair of opposed, segmental slots 121, in which operate integral splines or ke s 122 of the shaft 96, said keys being considbrably narrower than the slots .so as to have freedom for limited oscillating movement therein, the object of which will presently be set forth.

At its outer end the member 116 is provided with a cam face 123 which engages a similar camface 124 of a hub 125 that 1s slidably but non-rotatably keyed on the splines 122 of the shaft 96. A ring 126, preferably con-v sisting of a pair of semi-circular segments, is inset in notches in the keys 122, so as to hold the sleeve L16 against outward movement, and consequently if the sleeve 116 turns with respect to the hub 125, within the limits permitted by the keys 122 in the slots 121, the cam face 123 will push the hub 125 outwardly. This outward movement is in turn imparted to a collar 127 that is rotatable with respect to the hub 125 and is pivotally secured, as at 128, to one arm of a lever 129, in turn fulcrulned to a stationary support 130. The opposite arm of the lever 129 is forked, to engage the forward end of the shaft 89, which shaft end is provided with an adjustable stop nut 131. A latch 132 is pivoted to the lever 129 and when dropped down, as shown in Figs. 13 and 17, lessens the space or freedom of movement between the lever 129 and the nut 131. This space, between the latch 132 and nut 131, is 'suiiicientl large to permit the normal shiftin of the s aft 89 to throw the machine into elther high or low clutch connections. During 'the normal nut screwing operation power 1s transmitted from the engine to the shaft 96 through the

elements

109, 110, 114, 113, 115, and 112, the spring 115 being suiiiciently strong and tightened to transmit the load without permitting the slots 121 of the sleeve 116 toadvance on the keys 122. But when the nut is firmly screwed on it reacts throu h the gears and `clutches previously descri ed, to set up a resistance against the spring 115, through the hub 112, and as this resistance increases it causes the sleeve 116 to turn on, and momentarily not with, the shaft 96, within the limit of movement of the keys 122 in the slots 121, and when this limit is reached there has been a suiiicient rotation of the sleeve 116 with respect to the hub 125 to bring the cam faces 123 and 124 into action, and this reacts on the lever 129, causing the latch 132 to engage they nut 131 and move the clutch operating shaft 89 forward to itsv neutral position, it being understood that it would previously have been operating in its rear or low speed position. To change the degree of resistance required to set the automatic release mechanism in action it is only necessary to remove the pin 119 and turn the sleeve 116 with respect to the hub 113, thus tightening or loosening the spring 115 afterwhich the pin 119 is replaced. This is in effect adjusting the shaft 96 with respect to the fly wheel 110, and while an convement method for doing so ma be us I prefer to apply a spanner wrenc to the notches 118 while the iiy wheel is held against rotation.

When it is desired to apply positive and checked power to the wrenches, as for instance when a nut is rusted or frozen on, it is only necessary to raise and throw back the latch 132. By so doing the clearance between the lever 129 and nut 131 is enlarged to the point where the cam action 123--124 will not be sufficiently great to take up the additional clearance to move the shaft 89.

To unscrew or remove a nut it is necessary to reverse the' engine, or, if desired, provide a reversing mechanism between the engine and hub 109. In either event there is no necessity for utilizing the automatic release mechanism, above described. In fact it cannot be used at all, because if a nut cannot be removed with a predetermined degree of pressure the pressure must be increased until, if necessary, it forceably twists oif the bolt. But the power transmitting mechanism is without any adjustment, in readiness to accommodate this condition. With the hub 113 rotating in the opposite direction (from that indicated by the arrows in Fig. 15) the sleeve 116 positively engages the keys 122 of the shaft 96, and consequently the spring 115 plays no part in transmitting the power.

It is understood that suitable modifications may be made in the general desi and structural details of the machine Aas brein shown and described, provided, however, that such modifications come within the spirit and scope of the appended claims.

Having now therefore fully shown and described my invention, what I claim is:V

1. A machine of the character described comprising a frame adapted to be supported and travel on a pair of rails, andwith its center of gravity substantially above one of the rails whereby the entire machine may be quickly tumbled off the rails, and longitudinally spaced rockers for supporting the machine when tumbled from the rails.

2. A machine of the character described, comprising a portable frame adapted to be supported at its front and rear ends upon a rail and with the center of gravity of the machine substantially above the rail, laterally extending means for normally retaining themachine in an upright position, a track working tool and power unlt carried by the frame, and rockers carried by the frame for supportin the machine when tumbled from its norma upright position.

3; Al bolt tightening machine for rails, comprising a frame having wheel supports at its ends for supporting engagement with a rail, means for transversely shifting one end of the frame with respect to its wheel engaging member carried at said end of the machine, one -of said members being movable with respect tothe rail and the other stationar with respect to the rail when said end 'o the'frame is shifted.

4. A bolt tightening machine for rails, comprising a frame having wheel supports at its ends for supporting engagement with a rail, means for transversely shifting one end' of the frame with respect to its wheel support, a bolt retaining member and a nut engaging. member carried at said end of the machine, one of said members being movable with respect to the rail and the other stationary with respect tothe rail when said end of the frame is shifted, and means for verticall adjusting saidl end of the frame into an outpof workingposition with respect to the rail,

45. Ina machine ofthe character` described, a pair of transversely alignednlit tightenin wrenches, and a pair of bolt engagin ho din devices adapted each to be employe with t e oppositely` disposed wrench, said holding devices eac being mounted for ad justable movement in a plane extending at ri ht vangles to the axis of the bolt to be he d by it. A

6. In a machine of the character described, a pair of transversel aligned nut tightening wrenches, means or simultaneously raising and lowering the wrenches, and means transversely movable with respect to and be tween the wrenches for engaging the head of the bolt of which its nut is engaged by one of the wrenches.

7. A bolt tightener for a rail comprising a machine movable on the rail and having a pair of power o erated wrenches, one d isposed at each si e of the rail, for selective en gement with nuts of reversely arranged rai bolts, and holding members for engaging and `retaining the bolt when the nut thereof is being turned by one of the wrenches, said holding members being liftable from the bolt engaing position in a plane extending para el with the track. l v

8. In a machine of the character described, a power driven shaft, a rail tool adapted to be driven thereby, and a power transmission device for transmitting power from the shaft to the tool including means for automatically disengaging the power when the resistance of the tool reaches a predetermined degree, and means for rendering said disengaging means inoperative when it is desired to apply a positive force to the tool irrespective of the resistance thereof.

9. In a machine for operating on bolt nuts, a wrench for engaging the nut to tighten it on the bolt, a power unit, a clutch controlled power device for transmitting power from the unit to the wrench, said power device having a quick acting power reversing means whereby the ywrench may be loosened from the n ut. y v' 10. A machine for working on rail tracks comprising a frame to be carried on a track, a motor and track working mechanism carried on the frame, and rockers secured to the frame and extending therefrom to protect said motor and mechanism when the machine is tumbled from thetrack.

1 1. A rail working machine comprising a main frame for supporting a rail working mechanism and havin a support at its front end for engagement with the rail, a secondary frame for supporting the rear end of the main frame, a roller mountedrearwardly in the 'secondary frame for supporting both frames, the front end of the secondary frame being pivotally connected to the main frame, a hand lever ulcrumed to the secondary frame, and a liftin link connecting the hand leverto the main ame.

12. A railworking machine comprising a main frame for supporting a rail working mechanism and having a sup ort at its front end for engagement with t e rail, a secondary frame for supporting the rear end of the main frame, a roller mounted rearwardly in the secondar frame for supporting1 both frames, the ont end of the secon ary frame bein pivotally connected to the main frame, a and lever ulcrumed to the secondary frame, and a lifting link connecting the hand lever to the main frame at a point rearwardl of the pivot connection between the two ames.

13. A rail working machine comprising a main frame for supporting a rail working mechanism and having a support at its front end for' engagement with the rail, a secondary frame for supporting the rear end of the main frame, a roller mounted rearwardly in the seconda frame for supporting both frames, the ront end of the secon ary frame bein pivotally connected to the main frame, a and lever fulcrumed to the secondary frame, and a lifting link connecting the and lever to the main frame, said secondary frame servin as a support for the rear end of the main rame when the latter is in its lowered or operative position with respect to the rail.

14. A rail working machine comprisin a main frame for supporting a rail working mechanism and having a supportat its front end for engagement with the rail, a roller for supporting the rear end of the main frame, and means for transversely shifting the rear end ofthe main frame with respect .to the roller so as to adjust the rail working mechanism laterally with respect to the rai 15. A rail working machine comprising a. main frame for supporting a rail working mechanism and having a support at its front end for engagement with the rail, a roller for rail engagement at the rear end of the '5: main frame for supporting a rail working g 4main frame, a shaftslidable laxially in the mechanismand-havmg a support at its front end for enga ement with the rail, a roller for supporting t e `rear end of the main frame, and means for vertically and transversely adjusting the main frame with respect to the roller.

17. A rail working machine comprisin a main frame for supporting a rail working mechanism and havlng a support at its front end for engagement with the rail, a roller for supporting the .rear end of the main frame, a secondary frame connecting the main frame to the roller, and transversely adjustable with respect tothe roller to correspondingly adjust the main frame.y

18. A rail working machine comprising a main frame for supporting a rail working mechanism and havlng a support at its front end for engagement withv the rail, a roller for supporting the rear end of the main frame, a secondary frame connecting the main frame to the roller, and transversely adjustable with respect to the roller to cor respondingly adjust the main frame and a third frame transversely movable with respect to the second frame but held against transverse movement with respect to the roller to serve as a tool member support in conjunction with the rail working mechanism of the main frame.

19. A rail working machine comprising a main frame for supporting a rail working mechanism and having a support at its front end for engagement with the rail, a roller for supporting the rear Aend of' the main frame, a secondary frame connectin the main frame to the roller, and transverse y adjustable with respect to the roller to correspondingly adjust the main frame and a third frame movable with respect to the secondary frame but held against movement with respect to the roller, and manually operative means for transversely shifting the secondar and third frames with respect to each ot er.

20. A railway bolt tightening machine comprising a main frame having a wrench adapted to engage the nut of a rail bolt, a

roller for supportin .part of the frame,

means for transverse y shifting the frame with respect to the roller so as to engage or -disengage the wrench with respect to the nut, and means for engaging the bolt when the nut wrench is operated.

21. A railway bolt tightening machine comprising a main frame having a wrench adapted to engage the nut of a rail bolt, a roller for supporting part of the frame,

- unit, a wrench, a power transmission vmeans for transversel shifting the frame with respect to the rol er so as to en ge or disengage the wrench wlth respect to t e nut, and a bolt engaging member associated with -the roller so as to be held against transverse movement when the main frame is shifted.

22. A bolt tightener comprising a 'wer evice low speed connections for power from the unit to the including high an transmittin wrench, an means for disengaging the low speed connection when the resistance to the wrench reaches a predetermined degree.

23. A bolt tightener comprising a ower unit, a wrench, a power transmission evice including high and low speed connections for transmitting power from the unit to the wrench, and quick acting power reversing means for loosening the wrench from the nut.

Signedthis 28th day of January, 1929, at Minneapolis, Minnesota.

HORACE E. WOOLERY.

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