US675669A - Change-speed gear. - Google Patents

Description

No. 675,669. Patented .lune 4, 190|. NRLING.

CHANGE SPEED GEAR.

(Application filed Mar. 8, 1900.] (No Model.) 4 Sheets-Shen l.

mmm Imm Patented lune 4, l90l. 0. NORLING.

No. 675,669. Patented lune 4, |901. o. nomma.

CHANGE SPEED GEAR.

(Application filed Mar. 8, 1900.) (No Model.)

4 Sheets-Sheet 3.

Patentad lune 4, l90l.

4 Sheets-Sheet 4,

Y 7 1 mf 7 w/ d r i Y ,3% E Y w\\\\\ P M ,Y 3/ f 0 M ion filed Han 8, 1900.)

(No Modal.)

J W Y iwf.

UNiThn STATES PATENT OFFICE.

OSCAR NORLING, OF AURORA, LLINOIS, ASSIGNOR TO AURORA AUTOMATIC MACHINERY COMPANY, OF SAME PLACE.

CHANGE-SPEED GEAR.

SEQECIFIICATICN forming part of Letters Patent No. 675,669, dated June 4, 1901. `./ipplication filed March 8, 1900. Serial No. 7,793. (No model.)

To @ZZ whom it 71mg concern:

Be it known that i, OSCAR NORLING, of Aurora, in the county of Kane and State of lllinois, have invented certain new and useful Improvements in Change-Speed Gear; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon,

io which form a part of this specification.

This invention relates to an improvement in change-speed gears, the same being intended more particularly for use in driving the feed mechanism of an automatic metal-workr5 ing machine, but being adapted also for use in other cases where such devices are applicable.

The invention consists in the matters hereinafter described, and pointed out in the apzo pended claims.

In the accompanying drawings, illustrating one practical embodiment of my invention, Figure l is a plan view of a mechanism enibodying myinvention. Fig. 2 is a longitudinal section taken on a plane passing horizontally through Vthe central axis of the main shaft of the device. Fig. 3 is a detail vertical section taken on line 3 3 of Fig. 2. Fig. e is a detail section taken on line Ll 4 of Fig.

3o 2. Fig. 5 is a detail section taken on line 5 5 of Fig. 2. Fig. 6 is a detail section taken on line 6 G of Fig. 2; Fig. 7, a detail cross-section taken on line 7 7 of Fig. 2. Fig. S is a detail section of the parts shown in Fig. 7, taken on line 8 8 of said Fig. 7. Fig. 9 is a detail plan view with parts broken away, illustrating more clearly the construction of the parts shown in Figs. 7 and S. Fig. lO is a detail plan view of the end of the sleeve shown in 4o said Figs. 7, S, and 9. Fig. ll is a detail view of the spring-ring which is shown in said Figs. 7, S, and 9. Fig. l? is a face View of one of the bevel-gears shown in Figs. l and 2. Fig. 13 is a cross-sectional view of the other of said bevel-gears, showing the shaft on which said gear-wheel is mounted in side elevation. Fig. li is a face view of one end of the clutchsleeve shown in Fig. 2. Fig. l5 is a detail sectional view of the opposite end of said 5o clutch-sleeve. Fig. 1G is a detail sectional view of that one of the clutch members which is shown in Fig. 2 as attached to the sleeve which surrounds the main shaft. Fig'. 17 is a similar view of the clutch member shown in Fig. 2 as attached to the main shaft.

As illustrated in said drawings, A indicates the belt-pulley, through the medium of which power is applied to the change-speed gear illustrated and which is driven by a drivingbelt from any proper or available source of 6o power.

B indicates a shaft to be driven alternately at uniform and variable speeds and which as illustrated in the present case is the shaft which drives the speed mechanism of an automatic metal- Working machine, said machine being of that class in which several different cutting-tools are adapted to operate on a blank and in which it is desired that said tool should be fed or advanced at differ- 7o ent speeds, according to the character of the work to be done by said tool, and in which also the feed device has a reverse or backward movement to retract the cutting-tool, the device illustrated being adapted to give alternate periods of fast movement and variable slower movement to said shaft B, which turns always in one direction.

C indicates the main supporting shaft or spindle upon which the principal operative 8o parts of the device are mounted. This shaft is journaled at one end in a bracket D and at its opposite end in a bracket D', said brackets being supported in any suitable manner, preferably by being` attached to the frame of the machine on which the device is mounted. Said machine-frame as shown in the accompanying drawings is indicated by D5.

E indicates a sleeve or hollow shaft which is mounted on the shaft C, as herein shown 9o near the right-hand end of said shaft, and F F" are two beveled gear-Wheels, one of which is mounted on the sleeve E and the other of which is mounted on the shaft C at its end nearest the bearing D. The said g5 bevel-gears F and F' are arranged to face each other at a short distance apart, and said gears are adapted to interrnesh with a gearpinion A', which is mounted on the drivingpulley A, which driving-pulley has bearing los upon a horizontal bearing-stud a, secured to the bracket D and the axis of which is arranged radially with respect to the shaft C. Upon the shaft C, between the gears F F', is

mounted a slidable clutch-sleeve G, which is free both to rotate and move endwise on said shaft. Said sleeve is connected with an oscillatory actuating-lever H through the medium of a ring g, which engages a groove in the central part of the sleeve and has pivotal connection by means of a pivot 71J with the end of the actuating-lever H. The sleeve G is for the purpose of establishing operative connection between the bevel-gear'F and the shaft C or between the bevel-gear F and the sleeve E, on which the latter gear is mounted, said gears being constructed to turn freely on said shaft and sleeve when not connected therewith by means of the clutch device. Said clutch-sleeve and the opposing faces of the gears F and F are provided with clutch members or teeth arranged to face outwardly, so as to establish driving connection between said gears and clutch members F2 F3, which are secured to the end of the sleeve E and the shaft C within or adjacent to the hubs of the gear-Wheels F F. Said clutch members F2 F3 have the form of rings provided with a series of clutch-teeth ff, which engage corresponding teeth g g', formed on clutch-rings G G2, inserted in annular recesses formed in the ends of this clutch-sleeve, said rings bein'g secured in the ends of said clutch-sleeve by screw-threaded connections, as clearly shown in Fig. 15. The gear-Wheels F and F are provided outside of the ring F2 F3 with a series of cl utch-teethf2 f3, arranged to engage the clutch-teeth formed upon the outer parts of the clutching-ring, the said teeth g2 g2 being formed directly upon the sleeve, as clearly shown in the drawings. The clutch-teeth 2 3 are, however, for convenience of construction formed on separate clutch-rings F4 F5, inserted in annular grooves or recesses formed in theinner faces of the bevel gear- Wheels F F', said rings F4 F having external screw-threads engaging screw-threads in the outer Walls of said recesses in the said bevelgears, as clearly seen in Fig. 13. The clutchteeth on the clutch-sleeve, the gears, and the clutch members F2 and F3 are shown as made of triangular or ratchet shape to facilitate the interlocking or engagement thereof, and the inner and ou ter series of teeth in such instance face oppositely or in different directions in order to secure the proper interlocking thereof, as clearly shown in Figs. 12 and I3.

From the construction above described it will be understood that when the clutchsleeve is moved into contact with the bevelgear F driving connection will be established between the said bevel-gear and the shaft B, while the bevel-gear F will be left free to turn upon the' adjacent end of the sleeve E, and it will also be understoodthat when the said clutch-sleeve G is moved in the opposite direction and toward the bevel-gear F driving connection will be established between said bevel-gear and the sleeve E, while the opposite bevel-gear F will be free to turn upon the shaft C.

The clutch device described affords a means of giving rotary motion at different rates of speed to the shaft B, the said shaft B being connected by suitable intermediate driving mechanism with said shaft C and wit-h the sleeve E, as will be hereinafter described.

Now describing the devices illustrated for actuating the shifting-lever H for the purpose of shifting the clutch-sleeve G, these parts are made as follows: Said lever H is mounted on a vertical pivot-stud 7L and is provided adjacent toits pivot with two oppositely-extending transverse lever-arms 7L' 71,2, the rear or outer edges of which together have a curved contact or bearing surface h2. At the ends of said'arms 7171.2 are located two detent-levers I I', which are engaged to swing on vertical pivots t t', which conveniently have the form of studs inserted in the frame and the arm D. The detent-levers I I are adapted to swing toward and from the ends of the arms 71,' Wand are provided with notches i212, which are adapted for engagement with the ends of said arms 7i h2, the shoulders at the inner ends of said notches being so arranged that when the shoulder on one or the other of said detent-levers is engaged with one of the said arms 71,' 7b2 of the shifting-lever the clutch-sleeve G will be held or locked at one limit or the other of its movement. The said detent-levers I I are held or thrown yieldingly toward the arms 7i 7b2 by suitably-applied springs I2 I3. As herein shown, the spring I2 is of spirally-coiled form and is engaged at one end with a recessin the adjacent part of the machine-frame, so as to bear outwardly against the detent I, while the spring I2 is of leaf form and is attached at one end to the bracket I) and bears at its free end against the outer side of fthe detent-lever I.

J indicates an actuating-lever whichis pivotally mounted at one end on a stud j in such manner as to swingin a vertical plane, with its free end adjacent to the transverse arms 7L' 71.2 of thelever H. Said lever J carries twolongitndinally-slidable plungers J J2, which are adapted to act against the arms 7L h2 and are provided with sp1ings,\vhich act on said plungers in a manner to throw them outward and keep them pressed constantly against the said arms 71, 7b2. The points at which the said plungers J J2 bear against the arms 71, 7t2are at such distance apart that when one of the said plungers is acting at the outerend ofone of the arms the other plunger will bear against said arm adjacent to the pivot 7L. To avoid friction in the movement of said plunger along or over the bearing-surface 712 said plungers are provided with antifriction-rollersjj2. As a convenient construction of the parts the plungers J J2 are arranged to slide in a housing J5, attached to the lever J, and actuatingsprings J8 J4 are provided, which are made of coiled form and inserted within said housing between the inner ends of said plungers IOO IIO

and screw-studs ji ji, which are inserted in the rear ends of the housing and are adapted for adjustment to vary the tension of the said springs. In the operation of this part of the device oscillatory movement is given to the lever J through the medium of any suitable actuating connection, which connection is not herein illustrated, it being understood that an actuating link or lever may be connected with the stud jl, which projects upwardly from the top of the housing J5, or that the said lever J may be moved by hand. The oscillatory movement of said lever J is such as to carry the rollers j' or other projecting parts of or upon the lever J or plungers Jl J2 against or in contact with the detent-levers I I at the termination of the-stroke of the lever J in either direction. The parts are so arranged, moreover, that the actuatingsprings for the plungers Jl J2 will be normally under compression, said springs being strong enough to throw or move the clutch-sleeve G to one limit or the other of its movement when the pressure of one of said springs is exerted on the end of one of the arms 7L 7a2. It follows from the construction described that, assuming the clutch-sleeve to be at one limit of its movement and locked in such position by the engagement of one of the detent-levers, as I, with one of the lever-arms, as h2, if the lever J be now swung' so as to carryits free end toward the opposite detent-lever as soon as the end of the plunger at the side of the said lever adjacent to such opposite detent-lever comes in contact with the latter said detent-lever will be thrown outwardly free from the lever-arm engaged thereby, thus releasing said arm, and as soon as said lever is released the pressure of the plunger-sLn-ing throws the plunger outwardly, carrying with it the adjacent end of the lever-arm then engaged by it, with the result of swinging the lever II to the opposite limit of its throw. When said lever II reaches the opposite limit of its throw, the detent-lever, as I, which is engaged with the opposite lever-arm 7L', will come into holdingengagement with said lever-arm, and thereby retain said lever H from backward movement until by the return of the actuating-lever J its adjacent plunger will release the engaged detent -lever and throw forward its associated lever-arm, thereby again shifting the clutch-sleeve backward to its original position. The same operation will obviously take place each time the operating-lever J is moved or thrown.

Now, referring to the change-speed gear constituting an important part of my invention, the same is made as follows: The sleeve E, which surrounds the shaft C, as before stated, has hearing in a stationary arm or bracket "D2, and at its end which projects beyoud said bracket, at the left-hand side of the same, it is provided with a gear-pinion E. Said gear-pinion intermeshes with a plurality of beveled gears K K, which are mounted on obliquely-arranged tubular bearing-studs K K', which are rigidly attached to or mounted on radial arms D3 D2, forming a part of the bracket D2, the said bearing-studs K being inclined in a plane or planes which pass through the central axis of the shaft C. Attached to the outer faces of the beveled gears K K are conical friction-rollers K2 K2, having smooth contact-faces, the outer surfaces of which, or those at the greatest distance from the shaft C, are parallel to the said shaft.

L is a friction-wheel, the peripheral part of 'which is cylindric and surrounds the conical rollers K2 K2. Said wheel is mounted on a sleeve M, which sleeve surrounds the shaft C, between the sleeve E and the bearing D' of the said shaft. Said wheel is, moreover, provided with a central hub L', through which the sleeve M passes and to which it is connected bya spline and groove or thelikc, permitting the said wheel to slide endwise, but holding it from rotation on the sleeve. The hub is preferably connected with the outer or cyliudric part of the wheel through the medium of an oblique or conical web L2. Said wheel is provided adjacent to its open end with an inwardly-proj ecting friction surface or ring L2, which is adapted for contact with the cones K2 K2. A friction-wheel and conical roller thus arranged together constitute a friction driving-gear adapted for var ing the speed of a driven part by movement of the wheel or roller endwise with respect to the axis of rotation of the wheel in such manner that the friction ring or surface of the wheel will be engaged with the larger or smaller or any intermediate part of the conical roller.

So far as the general operation of the device is concerned the friction-ring L3 may be formed or constructed in any manner to afford an inwardly-facing friction-surface on the wheel L for engagement with the conical friction-rollers K2-as, for instance, said ring may consist merely of an inwardly-projecting rib on said wheel. As herein shown, however, and as a separate improvement, said friction-ring L2 is made of a material different from that composing the Wheel and is preferably made of paper, vulcanized fiber, leather, or like material. As herein shown said ring consists of a number of layers or thin rings of paper,vulcanized tiber,orleather, which are inserted in a groove or rabbet Z, formed in the peripheral portion of the wheel L, and held in said groove or rabbet by a clamping-ring Z', having screw-threaded engagement with the marginal part of the wheel.

As a further improvement I propose to make the conical friction-rollers K2 movable end wise on their bearings or pivots and to apply springs between said concs and their bearings or supports in such manner as to force or press the rollers outwardly in a direction endwise of their axis of rotation, so that said rollers will be held by spring-pressure con- ICO .ball-bearing.

-sprin g stantly in contact with the friction-ring of the wheel L. vAs a still further improvement I propose tor apply antifriction roller-bearings between said conical rollers and their bearings in such manner as to take the end thrust of the rollers. To now describe in detail the construction illustrated in the said conical rollers and their bearings, these parts are made as follows: The bearing-stud K' of each roller is made hollow or tubular and has an exterior cylindric surface in bearing contact with a cylindric axial bearing aperture in the roller and in the bevel-gear K, which is attached to the base of said roller. The bearing aperture on the roller is made so deep as to extend considerably beyond the extremities ofthe bearing-stud, and within the inner end of said bearing-aperture is located a bearing-ring 7c, forming the external member of a Within the'end of the tubular stud K is inserted an endwise-slidable spindle 7a2, which projects beyond the said stud and is provided on its projecting end with an annular bearing member or cone 7c3, arranged in opposition to the outer annular bearingring k,which latter constitutes,in effect,a cup, antifriction-ballsku1 being interposed between the conical bearing-surface 7c3 and the ring 7C. Said'spindle 7a2 is also preferably provided at its end with a reduced cylindric extension 7c, which enters a corresponding axial bearingaperture forming a continuation of the larger bearing-aperture of the roller. In the inner end of the tubular bearing-stud K', which la-tter is inserted through its supporting-arm D3, is inserted a screw-plug k6, and between said screw-plug and the inner end of the spindle 702 is interposed a coiled spring K3, which acts by its expansion to force or thrust the spindle 7a2 outwardly, and thereby thrust or carry the conical roller outwardly upon its bearingstud, with the result of pressing or holding it in contact with the friction-ringl of the wheel L. The screw-plug 7c being adjustable endwise in the bearing-stud K by reason of its screw-threaded connection with the same affords a means of adjusting the tension of the K3 and of thereby varying the pressure of the conical roller against the said friction-ring. The antifriction-bearing,arranged as described between the conical roller and the endwise movable spindle 7a2, obviously takes the end thrust of said spindle against the roller and lessens the frictional resistance to the rotation of the roller, which is due to I the endwise pressure of the roller against said spindle.

The friction-wheel L, mounted to slide endf' wise but not to rotate upon the shaft M, in connection with the conical friction-rollers K2, connected by the beveled gears with the sleeve E, as described, obviously constitute a change-speed gear through which motion is communicated from said sleeve E to the sleeve M. Said wheel L will be moved or shifted endwise on the sleeve M so as to bring the friction-ringLs in engagement with the larger or. smaller parts of the friction-rollers, and thereby vary the speed of rotation of the friction-wheel, by anysuitable actuating connection adapted for operation by the hand or automatically by the machine in connection with which the device is used. In the particular construction illustrated the hub L' of the-said wheel is provided with a groove containing a ring L4, which is connected by means of a link L5 with an actuating-lever L6, which lever may be operated by any suitable actuating device forming part of an automatic metalworking or other machine.

Now describing the driving connections between the main shaft C, the sleeve M, and the driven shaft B, these parts are constructed as follows: Said driven shaft B is arranged at right angles with and at some distance laterally from the shaft C, said shaftB being shown as journaled at its end in a bracket D4, attached to the bearing D', in which latter the end of the shaft C is mounted. A short counter-shaft N is arranged parallel with the end portion of the shaft C, the same being mounted in a bearing-sleeve D4, which is rigidly attached to the bearing D'. The counter-shaft is driven from the shaft C by means of a gear-wheel C', affixed to said shaft C, which intermeshes with a gear-pinion N, affixed to the adjacent end of the counter-shaft N. Said counter-shaft N is arranged with its axis in the same plane with the driven shaft B, and said driven shaft has affixed to it a beveled `gear B, which intermeshes with a bevel-gear N2 on the adjacent end of said counter-shaft N, whereby the shaft B receives motion from said counter-shaft. The shaft B also carries a worm-wheel O, which intermeshes with a worm M on the sleeve M. Said worm-wheel Q is not attached to said shaft, but is adapted to turn thereon and has driving connection therewith through the medium of a sleeve P, which is keyed to said shaft B and is provided at its end adjacent to the worm-wheel with ratChet-teethp,adapt ed for engagement with the free end of a pawl O', Figs. 7 and 10, which pawl is pivoted to the worm-wheel and engages said ratchetteeth p. The ypawl O is adapted to be moved or actuated by meansl of a spring-ring Q, which encircles the sleeve P in such manner as to have frictional engagement therewith and is provided with an outwardly-extendin g prong or arm q, which engages an aperture in a laterally-projecting lug 0 on the pawl O'. Said spring-ring Q by reason of its frictional engagement with the sleeve P tends to turn with said sleeve and the shaft B,and when said shaft is driven from the main shaft through the counter-shaft N the pressure of the arm q of said ring Q on the pawl O will throw said pawl outwardly and hold it free from the ratchet-teeth p, thereby enabling said shaft B to turn within the worm-wheel O without contact of the pawl with the ratchet-teeth so long as it is so driven or actuated by the shaft C. If, however, the shaft M be actuated IOO IIO

and the worin-wheel O be rotated therefrom through the medium of the worm M,the turning of said worm-wheel on the shaft B will bring pressure of the lug o against the springring Q in a direction to carry the free end of the pawl into engagement with the ratchetteeth p, thereby interlocking said wormwheel with said shaft D, after which the said shaft D will be driven from the shaft M at a speed determined by the relative'proportion of the worm and the worm-wheel and by the position of the friction-wheel L with respect to the friction-rollers IU.

The operation of the device as a whole will be understood from the following: Vhen itis desired to drive the shaft B at a relatively high and constantspeed, as is required in an automatic machine for retracting the cutting-tools from their work, the clutch-sleeve G is thrown toward the bevel-gear F, so as to bring the clutch members or teeth thereon at once into engagement with the clutch member F5 on the shaft C and the clutch-teeth on said bevel-wheel F. This is the position illustrated in several figures of the drawings. At this time the bevel-gear F will be engaged with the main shaft C, which will be then driven from the driving-pulley A at a speed determined by the gearing connecting these parts. The rotation of the shaft C will be transmitted to the counter-shaft Nby the gearwheels connecting them, and the driven shaft will be actuated from said counter-shaft by the bevel-gears N2 and B. When said shaft Bis so driven from the shaft C, it will be disconnected from the worm-wheel O, as the ratchet-teeth will be free to turn forwardly with respect to the pawl O. Moreover, by reason of the action of the spring Q said pawl will at this time be held free from said ratchet-teeth. lVhen it is desired to drive said shaft B in the same direction at aslower and variable speed,the clutch-sleeve G will be shifted toward the bevel-gear F, with the result of rigidly connecting the bevel-gear F Vwit-h the sleeve E, it being understood that previous to such movement said bevelgear was free to turn on the sleeve and that after the clutch-sleeve is thus moved or shifted the bevel-gear F will be released from its connect-ion with the shaft C and will be free to turn thereon. lVhen the bevel-gear F is thus connected with the sleeve E, said sleeve will be rotated, thereby turning the pinion E and giving rotary motion to the conical friction-rollers K2. These rollers being pressed against the friction-ring of the wheel L, said wheel willbe driven ata speed depending on the position of the frictionring with respect to the ends of the rollers, the wheels L being driven more slowly when the ring is in contact with the smaller ends of the rollers and more rapidly when in contact with the larger ends of said rollers. The rotary motion so given to said wheel L will be transmitted to the sleeve M and from said sleeve, by the worm and worm-wheel connection described, to said shaft B. It will of course be understood that said shaft B will be driven from the worm-wheel through the action of the pawl O and that the shaft C will be turned or rotated through the action of the gearing connecting it with said shaft l, although such rotation of the shaft C will have no eifect whatever upon the operation of the other parts through which the shaft B is at this time being driven.

I claim as my inventionl. Achange-speed gearembracingtwo gearwheels, an intermediate, endwise movable clutch-sleeve and means for operating..r said sleeve comprising an oscillating lever provided with two lever-arms, spring-actuated detent-arms engaging said lever-arms, and an oscillating actuating-lever for actuating the lever-arms and detent-arms, said actuatinglever being provided with two spring-actuated plungers which act on said lever-arms to give oscillatory movement to the said lever.

2. A change-speed gear embracing a main shaft, a sleeve which turns on the shaft, two bevel-gears, one of which turns on the shaft and the other on the said sleeve, clutch members on the said gear-wheels, clutch members on the said shaft and sleeve, an endwise-movable clutch-sleeve provided at each end with tivo sets of clutch-teeth adapted for engaging the clutch members on the shaft, sleeve and gear-wheels, and means for actuating said clutch-sleeve.

3. A change-speed gear embracing a rotative friction-wheel provided with an inwardlyfacing friction-ring, and a rotative, conical friction-roller having its outer surface in contact with the said friction-ring, and parallel with the axis of rotation of the wheel; said wheel and friction roller having .relative movement in the direction of the aXis of rotation of said wheel.

4. A change-speed gear embracing a rotative friction-wheel provided with an inwardlyfacing friction-ring, a conical friction-roller having its outer surface in contact with said ring, and power-transmitting connections for the roller, embracing a gear-wheel mounted concentrically with the axis of rotation of said wheel and having driving connection with the roller; said friction-wheel and the roller having relative movement in the direction of the axis of rotation of said friction-Wheel.

5. A change-speed gear embracing a rotative friction-wheel provided with an inwardlyfacing friction-ring, a conical friction-roller, a stationary part provided with bearing-studs for said roller, a spring applied between said stationary part and the roller tending to move the latter endwise in the direction to maintain its contact with said friction-ring, said part carrying said friction-roller and the said friction-wheel having relative movement in the direction of the axis of rotation of said wheel.

6. A change-speed gear embracing a friction-wheel provided with an inwardly-facing IOO Iio

'friction-ring, a conical roller engaging said friction-ring, a bearing-stud for the roller, said roller being movable endwise on said bearing-stud, a roller-bearing for said roller embracing two annular parts or members one of which is movable endwise with respect to the said bearing-stud, and a .spring applied to said part of the bearing which is movably connected with the stud to move said part outwardly with respect to the said bearingstud.

7. A change-speed gear embracing a rotative friction-wheel provided with an inwardlyfacing friction-ring, a rotative conical friction-roller, abearing-stud of tubular form for said friction-roller, an antifriction roller-bearing comprising two annular parts one of which has the sliding engagement with the said bearing-stud, a screw-plug inserted in the vinner end of said bearing-stud, and a coiled spring inserted in said tubular stud between said screw-plug and said sliding member of the ball-bearing. f

8. A change-speed gear embracing a rotative friction-wheel provided with an inwardlyfacing friction-ring, a plurality of conical friction-rollers engaging said friction-ring, bearing-studs for said rollers, a stationary part in which said studs are mounted, bevelgears attached to said friction-rollers, a gearpinion mounted in said stationary part concentrically with the axis of rotation of said Wheel and intermeshing with said bevel-gears, and a rotative part on which said frictionwheel ismounted and with which it has endwise slidable but non-rotative connection.

9. v A change-speed gear embracing a main shaft, a sleeve thereon, two bevel-gears, one mounted to turn on the sleeve and the other on the shaft, clutch members one of which is attached to the shaft and the other to the said sleeve, clutch members attached to said bevel-gears,a slidable clutch-sleeve provided at each end with two clutch members, said clutch members being adapted for engagement with the clutch members on the shaft,

sleeve and bevel-gears, a frictionwheelv mounted concentrically with said shaft and provided with an inwardly-facing frictionring, a conical friction-roller engaging said friction-ring, a bevel-gear attached to said conical roller,and a gear-pinion on said sleeve intermeshing with said bevel-gear on the conical roller.

lO. A change-speed gear embracing a main shaft, a sleeve thereon, two bevel-gears one turning on 'the shaft and the other on the sleeve, a drivingpinion intermeshing with saidbevel-gears, clutch members secured to the shaft and to the said sleeve, clutch members on the said bevel-gears, a slidable clutchsleeve provided at each end with two clutch members, said clutch members on the sleeve being adapted for engagement with the clutch members on the shaft, sleeve and bevel-gears, a rotative friction-wheel provided with an inwardly-facing friction-ring, a conical friction-roller engaging said friction-ring, a bearing-stud for said roller, a stationary support for said bearing-stud through which said sleeve passes and which affords a bearing for the same, a bevel-gear attached to said friction-roller, a gear-pinion on said sleeve intermeshing with said bevel-gear, a second sleeve on said shaft with which said wheel has sliding but non-rotative engagement, a shaft to be driven and driving connections between said main shaft and said shaft to be driven and also between said second sleeve and said shaft to bedriven.

ll. A change-speed gear embracing a main shaft, a shaft to be driven, two bevel-gears mounted on said shaft, a drivii'ig-pinion intermeshing with said bevel-gears, a sleeve surrounding said shaft, a clutch mechanism for connecting one of said bevel-gears with the shaft and the other with said sleeve, a second sleeve on said shaft, a speed-changing device affording driving connection between said first and second sleeves, gearing connecting said main shaft with the driven shaft, and gearing connecting said second sleeve with the drivenV shaft embracing a pawl-and-ratchet connection.

l2. A change-speed gear embracing a main shaft, a shaft to be driven arranged at right angles with the main shaft, two bevel-'gears mounted on said main shaft, a driving-pinion intermeshing with said bevel-gears, a sleeve surrounding said shaft, a clutch mechanism for connecting one of said bevel-gears with the shaft and the other with the sleeve, a second sleeve on said shaft, a speed-changing device affording driving connection be'- tween said first and .second sleeves, gearing connecting said main shaft with the driven shaft embracing a counter-shaft and bevelgears, and gearing connecting said second sleeve with the driven shaft embracing a worm on said sleeve, a worm-wheel on the shaft and a ratchet connection between said worm-wheel and said shaft.

13. The combination, with a main shaft, a sleeve thereon, a gear through which said main shaft and sleeve are given rotary motion, a counter-shaft, gearing connecting the main shaft with the counter-shaft, a driven shaft at right angles to the main shaft, bevelgears connecting the counter-shaft with the driven shaft, a worm on said sleeve, a wormwheel mounted to turn on said driven shaft, and a pawl-and-ratchetA connection between said worin-wheel and said driven shaft.

In testimony that I claim the foregoing as my invention I affix my signature, in presence of two witnesses, this 21st day of August, A. D. 1899.

osoR NoRLiNe.

i Witnesses:

W. A. HEMING, J. H. ABERCROMBIE.

ICO

IIO

Images