US767604A - Frictional driving mechanism. - Google Patents

Description

No. 767,604. PATENTED AUG. 16, 1904.

E. A. SPERRY.

PRIGTIONAL DRIVING MECHANISM.

APPLIOATION FILED NOV. 24, 1903.

N0 MODEL. 2 SHEETS-SHEET l.

No. 767,604. Patented August 16, 1904.

UNrrED STATES ATENT FFICE.

ELMER A. SPERRY, OF CLEVELAND, OHIO, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO AMERICAN ELECTRIC AND CONTROLLER COMPANY, A COR- PORATION OF DELA IVARE.

FRIOTIONAL DRIVING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 767,604, dated. August 16, 1904. Application filed November 24,1903. $erialNo.18Z,4=98. (N model.)

TO all whom it y supporting-frames A and B, which rest upon Be it known thatI, ELMER A. SPERRY, a citithe base 13. These frames are alike, and 50 Zen of the United States, residing at Clevetherefore a description of one is a description land, county of Cuyahoga, State of Ohio, have of each. and each comprises two sections, one

invented certain new and. useful Improveof which rests upon the base 13 and comprises ments in Frictional Driving Mechanism, of the hub 1A, in which the shaft is journaled, a Which the following is a specification. suitable bushing 111 being placed in said hub. 5 5

This invention relates to frictional driving Bent arms 15, 16, 17, and 18 radiate from the gear by which the ratio of the speed of the hub and carry at their outer ends the journaldriving member to that of the driven mem- - box sections 19, 20, 21,-and 22. Encircling ber may be varied, and has for one object to the arms of the section and secured to their secure the even distribution of strains, while outer ends is the ring or band 23. The other also securing great variation of speed. section comprises a hub 26, adapted to sleeve In the accompanying drawings, Figure 1 is upon hub let, and from hub' 26 extend four 5 a vertical longitudinal section of my improved radial arms similar to those of the other seegearing, in which the friction wheels and tion except that they are oppositely bent and their supports on the right-hand side are upon their'outer ends are supported the other shown in elevation. Fig. 2 is a vertical secsection of the journal-boxes and an encircling tion on the line a" w of Fig. 1 looking in the band 28, similar to band 23. The sections are 20 direction of the arrow. assembled to form a frame by sleeving the There are two separated parallel framesAB hub 26 upon the hub let, and the arms on the erected upon a suitable base, and each has a two sections are brought opposite each other,

, central bearing for a rotating shaft 10 and whenbolt- holes 30,31,32, and 33 of the journalcarries four Wheel-frames C D EF at right box sections willregister,and they may then be 25 angles to each other, each of said frames havbolted together. -Journaled upon hubs 1A so ing trunnions, so that it may swing about its as to rotate and have longitudinal movement longitudinal axis, and in each frame turns a thereon is a hollow pulley G, a suitable bushfriction-wheel I, the shaft or axis 56 of which ing 13 1 being interposed between the pulley is at right angles to that of the wheel-frame. and the hubs. The pulley G has concave side 30 About theshaft 10 between the frames A faces 35 and 36, which extend completely B turns a rotatable member, as a pulley G, the around the pulley and with which the frictionopposite faces of which are curved to coincide .wheels engage. Inasmuch as the pulley G is with circles traversed by theperipheries of the longitudinally movable upon the hubs 14:, it wheels I as they are adjusted. Upon the shaft will readily adjust itself to any inequalities 35 10 are mounted friction members, as disks of the friction-wheels bearing upon its two H K, each having a universal-jointed connecfaces. In the driving-face 3'7 of the pulley tion with the shaft, but rotating therewith, are oil-holes. as 38, through which oil may be and each with an inner-curved face coincidintroduced into the interior of the pulley,

ing with the path traversed by the peripheries whence it finds its way through holes, as 39,

4 of the wheels I as they are adjusted. to the pulley-bearings and thence through The wheel-frames are operatively related holes, as A0 and I1, to the bearings of the to worms LM, secured to rotatable shaftP, so shaft 10. The holes 38 may be threaded, as 9 that all the wheel-frames may be turned about shown, to receive threaded plugs whereby their longitudinal axes by rotating shaft P. the holes may be closed and the entrance of 45 The above parts may be constructed in any dirt to the interior of the pulley prevented.

suitable manner. I will now describe that Secured to one end of the shaft 10 is the shown. hemispherical piece a2, which is adapted to The shaft 10 is supported in bearings in the l enter a hemispherical cavity in the hub 43 of I gular relation thereto in a longitudinal direca disk H, and thereby form a sort of ball-andsocket joint. Thedisk is, however, keyed on the piece 42. so that it cannot rotate about the axis of shaft 10, but may change its antion. The disk H has a concave face 45 upon its inner side, which is similar to the face 36 on pulley (i and is opposite thereto. Near the other end of the shaft 10 is mounted the pulley 46, which is chosen of a diameter with relation to pulley G such that certain relative peripheral speeds are obtained, as will be hereinafter described. Pulley 46 has the hub 47, which is secured against rotation upon the shaft 10 by a key 76; but it may have longitudinal movement and has a hemispherical portion on which is mounted a disk K. This disk is similar to the disk H and is mounted in the same manner, its concave face 49 being opposite to the similar face 35 of the pulley 34. The shaft 10 extends beyond the hub 47 and is threaded upon its end to receive the locking-nuts 50 and 51. A washer 52 is placed inside the nuts, and interposed between the washer and the hub 47 is a spring 53, which forces the disks H and K toward each other and against the friction-wheels, and since the disks H and K may have angular movement longitudinally of shaft 10 and are movable longitudinally they readily adjust themselves to inequalities in the friction-wheels.

J ournaled in each of the boxes supported at the outer ends of the arms of each of the frames A and B are trunnions 54 and 55, which support frames O D E F for the friction-wheels I. In this case there are four of these wheel-frames and friction-wheels, Fig. 2, supported by frame A upon one side of the pulley G, and upon the other side of the pulley. (i similar friction-wheels and their supporting-frames are similarly supported by the frame B. The number of friction-wheels upon each side of the pulley should be at least three for proper operation where the friction-disks have universal-joint connections, as described, and these friction-wheels are preferably equidistantly spaced. The construction of each of the wheel-frames and friction-wheels is identical with the others except that certain of the trunnions 55 of the wheel-frames are shorter than others, 54, owing to the fact that their bearings cross each other, and therefore a description of one friction-wheel and its frame will be a description of each. Each wheelframe comprises end pieces and 61, secured to supporting-trunnions in any suitable manner, and to these end pieces are secured side bars 62 and 63, in which is journaled, preferably by means of ball-bearings, as shown, a friction-wheel I, having its axis passing through that of shaft 10. Secured in a peripheral groove of the friction-wheel is leather 64 or other suitable substance for insuring frictional engagen'ient between the wheel and the surfaces with which it comes in contact. Upon the inner sides and at the ends ofeach wheelframe are the beveled gear- segments 65 and 66, which are adapted to engage with similar gears upon adjacent wheel -frames. Upon each side of pulley (Jr two of the wheel-frame trunnions have extensions 67 and 68 projecting beyond their bearings. Upon these extensions are sleeved the hubs of arms 69 and 70, which are secured thereon by the washers 71 and screws 72, tapped into the ends of the extensions. The arms 69 and are secured against rotation about extensions 67 and 68 by keys or other suitable means and at their outer ends are provided with wormgears adapted to engage with a worm L or M, the arms upon one side of the pulley G engaging with one worm, while those on the other side of the pulley engage with the other worm.v The worms L and M are rigidly secured to shaft P, which is rotatably mounted in the base 18 and extends longitudinally thereof.

Power may be applied to either of the pulleys G or 46 and taken from the other. Assuming that the power is applied to pulley G, the faces 35 and 36 will frictionally turn the friction-wheels I about their axes. These wheels in turn frictionally rotate the disks H and K by engagement with their faces 49 and 45, and shaft 10 and pulley 46 are carried with them. If power were applied to pulley 46, the power would be transmitted from the disks to the, friction-wheels and thence to pulley G.

The ratio of the angular speeds of the driving and driven pul leysthat is, the ratio of their numbers of revolutions ina given timedepends upon the angular position of the friction-wheels with relation to the shaft 10, as will be well understood, and by turning the shaft P by any suitable means the worms L and M will operate through arms, as 69 and 70, to turn certain of the wheel-frame trunnions, as 54 and 55, by means of extensions,

'as 67 and 68, thereby changing the angular relation of the friction-wheels supported by those frames to the axis of shaft 10, and through the gears 65 and 66 the remaining wheel-frames will be similarly turned. It will thus be seen that by revolving shaft P all the friction-wheels upon both sides of pulley G are similarly and simultaneously adjusted to vary the ratio of the angular speeds of the driving and driven members. The ratio of the peripheral speeds of the pulleys, and therefore of the speeds of the belts upon them, is dependent upon their, relative diameters as well as upon their angular speeds. A certain ratio of the peripheral speeds for a given adjustment of the friction-wheels may be obtained by choosing pulleys of proper diameters, and this ratio may be varied by adjusting the friction-wheels as described.

Without limiting myself to the precise construction and'arrangement of parts SllOWDiLHCl described, I claim- 1. In a frictional driving-gear, the combination of a rotatable member, friction-wheels engaging with opposite sides of said member, cooperating disks, a shaft therefor and a common support for said member and said shaft, substantially as described.

2. In a frictional driving-gear, the combi-v nation of' a pulley, friction-wheels engaging with opposite sides of said pulley, cooperating disks, a shaft therefor and a common support for said pulley and said shaft, substantially as described.

3. In a-frictional driving-gear, the combination of a rotatable member, friction-wheels engaging with one side of said member and a disk bearing upon said friction-wheels, said member and disk being-longitudinally movable and the disk being angularly movable in respect to the shaft, substantially as described.

4:. In a frictional driving-gear, the combination of a shaft, a disk thereon secured against motion of rotation with reference to said shaft but movable angularly with relation to the axis of said shaft and friction-wheels engaging with said disk, substantially as described.

5. In a frictional driving-gear, the combination of a shaft, a member longitudinally and rotatably movable, friction -wheels bearing against said member on opposite sides and disks secured against rotation with reference to said shaft and bearing against said wheels but angularly movable with relation to said shaft, substantially as described.

v 6. In a frictional driving-gear, the combinationof a pulley having a curved face at each side,two sets of swinging friction-wheels bearingupon both faces of said pulley, each set having three or more wheels and disks having universal-joint connections and curved faces bearing upon said friction-wheels, substantially as described.

7. The combination in a frictional drivinggear, of three friction members, a set of friction-wheels between the central member and each outer member, each set comprising three or more wheels and the outer members having universal-joint connections, and means whereby the two outer members or the central member may be driven positively, substantially as described.

8. The combination in a frictional drivinggear, of three friction members having curved faces, a set of swinging friction-wheels between the central member and each outer member, each set comprising three or more wheels and the outer members having universal-joint connections, and means whereby the two outer members or the central member may be driven positively, substantially as described.

9. In a frictional driving-gear, the combination of a pulley, friction-wheels bearing upon both sides of said pulley and disks bearing upon said friction-wheels, said pulley and disks being longitudinally movable and the disks being angularly movable, substantially as described.

10. In a frictional driving-gear, the combination of a pulley, friction-wheels bearing upon both sides of said pulley and disks bearing upon said friction-wheels, said pulley and disks being longitudinally movable and the disks being angularly movable, and a shaft carrying the disks and about which the pulley rotates, substantially as described.

11. In africtional driving-gear, the combination of two sets of friction-wheels, a stationary support for each set of wheels, a pulley mounted between said sets of frictionwheels so as to have movement of rotation, a shaft rotatably mounted in said supports, a disk secured upon said shaft in such manner as to have angular movement only with relation to said shaft and bearing upon one of said sets of friction-wheels and a second disk mounted upon said shaft and secured thereto in such manner as to prevent rotation but permit angular movement of said second disk with relation to said shaft, said second disk bearing upon the other of said sets. of friction-wheels, substantially as described.

12. In a frictional driving-gear, the combination of two sets of friction-wheels, a stationary support for each set of wheels, a pulley mounted between said sets of frictionwheels so as to have longitudinal movement and also movement of rotation, a shaft rotatably mounted in said supports, a disk secured upon said shaft in such manner as to have angular movement only with relation to. said shaft and bearing upon one of said sets of friction-wheels and a second disk mounted upon said shaft and secured thereto in such manner as to prevent rotation but permit longitudinal angular movement of said second disk with relation to said shaft, said second disk bearing upon the other of said sets of frictionwheels. substantially as described.

13. In a frictional driving-gear, the combination of two sets of friction-wheels, a stationarysupport for each of said sets of wheels, a shaft rotatably mounted in said supports, a pulley having concay e sides, said pulley being mountedbetween said sets of frictionwheels, a disk having a concave face bearing against one of said sets of friction-wheels, said disk being mounted upon said shaft so as to have longitudinal and angular movement wheels, so as to balance the pressures upon the friction-wheels, substantially as described.

14. The combination with two oppositelyarranged frames of friction-wheels carried thereby, friction members engaging the wheels, and an intermediate pulley in contact with said wheels and journaled upon said frames, substantially as described.

15. The combination with two oppositelyarranged frames of swinging friction-wheels carried thereby, friction members engaging said wheels, an intermediatepulley in contact with said wheels and journaled on said frames, and means for swinging the frictionwheels to different positions, substantially as described.

16. The combination with two oppositelyarranged frames of swinging friction-Wheels carried thereby, friction members engaging said wheels each with a curved engaging face, and an intermediate pulley with a curved face on each side and journaled on said frames, substantially as described.

17. The combination with the supportingframe and its friction-wheels each mounted to rotate on its axis and swing about an axis perpendicular thereto, of a shaft, and a member engaging the peripheries of said wheels and mounted on said shaft to rotate therewith while changing freely its angular position relative thereto, substantially as described.

18. In a frictional driving-gear comprising friction-wheels and supporting-frames with trunnions, a frame in sections, and means for fastening said sections together, each section comprising a hub, arms radiating from said hub and trunnion-box sections secured to said arms, substantially as described.

19. In a frictional driving-gear, the combination of a frame comprising sections with a means for securing said sections together, each section comprising a hub, arms radiating therefrom, a band connecting the extremities of said arms and journal-box sections supported by the section, substantially as described.

20. In a frictional driving-gear, the combination of a sectional frame and means for fastening the sections together, each section comprising a hub, bent arms radiating therefrom and box-sections secured to said arms, friction-wheel frames journaled in the boxes said wheelrframes swinging in the openings formed by the bends in the arms, and frictionwheels mounted in said wheel-frames, substantially as described.

21. In a frictional drivinggear, a frame, friction Wheel frames revolubly mounted thereon, friction-wheels mounted in said latter frames, gear-segments upon each wheelframe engaging with similar segments upon adjacent wheel-frames and means for swinging the friction-wheel frames, substantially as described.

22. In a frictional drivingmechanism, the combination of a support, a wheel frame rocking thereon, a friction-wheel mounted in said frame, a friction member journaled on said support and engaging with said frictionwheel, a gear on said frame, a worm engaging with said gear and means for turning said worm, substantially as described.

23. In a frictional driving mechanism, the combination of a base, a plurality of supports mounted thereon, a set of revolubly-mounted wheel-frames carried by each support and provided with worm-gears, friction-wheels mounted in said frames, a friction member j ournaled on said supports, a shaft and a Worm on said shaft engaging with the worm-gears of each set, substantially as described.

24:. In a frictional driving-gear, the combination of a support, trunnion-boxes thereon, wheel-frames having trunnions supported in said boxes, one of, said trunnions extending beyond its box, an arm secured to said extended trunnion, said arm having a wormgear at its extremity, a worm engaging with said worm-gear and a shaft carrying said worm. substantially as described.

25. In africtional driving-gear, the combination of two friction members, one or more of which has a universal-joint connection, three or more friction-wheels between said members and means for forcing said members against said wheels, substantially as described.

26. In a frictional driving-gear, the combination of two friction members, one or more of which has a universal-joint connection, three or more equidistantly-spaeed frictionwheels between said members and means for forcing said members against said wheels, substantially as described.

27. In a frictional driving-gear, the combination of two friction members, one or more of which has a universal-joint connection, three or more friction-wheels between said members and resilient means for forcing said members against said wheels, substantially as described.

28. In a frictional driving-gear, the combination of two friction members, three or more friction-wheels between said members,

' means for forcing said members against said wheels and a universal joint for one of said members mounted between said member and said means, substantially as described.

- In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ELMER A. SPERRY.

Witnesses:

F. L. FREEMAN, THOS. HOWE.

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