3 sheets-Sheet 1. (No Model.) D. S. STEWAR.T. TRACTION ENGINE. No. 484,828, Patented Oct. 25, 1892.

(No Model.) 3 sheets-Sheet 2. D.TRACTION s. STEWAR.T. ENGINE. No. 484,828. Patented Oct. 25, l892.

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(No Model.) 3 Sheets-Sheet, 3. D. S. STEWAR.T. TRACTION ENGINE, No. 484,828. Patented Oct. 25, 1892.

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UNITED STATES PATENT OFFICE. DAVID s. STEWART, OF MORRIS, WISCONSIN. TRACTION-ENGINE. A. SPECIFICATION forming part of Letters Patent No. 484,828, dated October 25, 1892, Application filed December 21, 1891, Serial No. 415,712, (No model.) To all whom it may conceriu: ner. As illustrated in the drawings, each of 55 Be it known that I, DAVID S. STEWART, a the shafts.j of tho front truck is connected at citizen of the United States, and a resident one end by means of a universal joint. I, with of Morris, in the county of Shawano, and in a revoluble shaft extending diagonally be 5 the State of Wisconsin, have invented certain tween the front and rear trucks and similarly new and useful Improvements in Traction engaged with the shafti upon the opposite Engines; and I do hereby declare that the fol side of the rear truck. These revoluble di. lowing is a full, clear, and exact description agonally-extending shafts each comprise an thereof, angular shaft or rod R, having a sliding en To My invention relates to certain new and gagement at its front and rear ends with cor useful improvenents in traction-engines; and respondingly-shapcil tubular sections Is' K', it consists in the matters hereinafter described, as shown more particularly in Fig. 2. To the and pointed out in the appended claims. forward ends of sail shafts on the front The invention relates more particularly to truck are secured by similar universal cou 5 an improved form of traction-engine adapted nections I, I.' revoluble angular shafts MIM, for use in doing heavy hauling, such as for engaged with correspondingly-shaped tubu 70 logging and similar purposes, capable of be lar sections AM", which are in turn engaged ing used in all kinds of weather and upon all by universal joints in in with suitable crank kinds of roads, or driving shafts N N, driven by suitable en 20 In the accompanying drawings, illustrating gines () (), preferably located upon a plat my. invention, Figuro 1 is a side elevation, for in S at the front end of the boiler and sup- 75 partly in section, of a traction-engine embody plied with steam from the builer by a pipelo. ing my invention. Fig. 2 is a longitudinal At convenient points on the crank-shafts horizontal section of the same, taken on line isN suitablyN are located supported wheels a sliding 1, between bar or rodwhich R, as 22 of Fig. 1. Fig. 3 is a transverse vertical carrying brake-shoes adapted to engage with section of Iny improved traction-engine, taken the peripheries of said wheels 1’, and adapt through one of the trucks. Fig. 4 is a dotail cd to be moved by a lever Q, so as to bring view of one portion of my improved appa either of said shoes into opeative ongagement ratus.In saic drawings, A represents- the boiler with one of the wheels 1. 30 of my improved traction-engine; A, the fire As shown in the drawings, the wheels G (; 85 man's cab; B B, the truck-frames; C C, the upon each truck are actuated by the driving axles of the traction-wheols, and DI) supports mechanism to drive the traction-chains F F, for the boiler A, pivotally engaged with the the wheels EE running loosely upon the ends central portions of the axles CC. of the axles C ( and the wheels G. G' being 35 EE are the traction-wheels, and F aro arranged to run as idlers and simply serving go traction-chains trained over said wheels EE to hold the chains FF in proper position ani and wheels G and G', respectively. Each of sufficiently taut to secure the proper opera tion of said chains. . the trucks is provided with one of the axles. Any convenient form of traction-chains 40 C, a traction-wheel E, located upon each end may be employed; but I prefer to construct 95 of said axle, a chain F, trained over said trac these chairis with suitable traction-teeth and tion-wheel, and wheels G and G', over which with links adapted to engage with teeth upon said chains are also trained. pon the innor the wheels (; G and G' G'. If desired, the end of the shaft g of each of the wheels G is wheels E E may also be provided with teeth; 45 located a suitable gear-wheel II, which is op but I prefer to provide said wheels with OO eratively engaged in any desired manner with groovese e in their peripheries, in which said suitable driving mechauism. In tho partic chains lie. The idler-gears G'G' are prefer ular form illustrated in the drawings this ably mounted on stud-shafts g'g', which are gear-wheel II is arranged to mesh with a pin journaled in sliding boxes , which are so ion h, located upon the outer end of a shaft pressed away from the other wheels G G by I, upon the inner end of which is provided a springs or cushions gig. bevel-gear I, meshing in turn with a beyel : Any suitable means may be provided for pinionwhich powerJ, which is appliedis located in anyupon, desired a shafti, man to preventing vertical play, or oscillation of the

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trucks beneath the boiler A-as, for instance, as illustrated in the drawings, in which a the platform S may be provided, that illus stirrup or support T is arranged to depend trated in the drawings and herein described from the lower side of the boiler and is en being a simple form of brake mechanism gaged at its lower side with an eye or loop t adapted to be thrown into engagement with 7o upon the frame of the truck. The stirrup or either one of the wheels PP upon the crank support T, at its lower side where it engages shafts of said engines, as may be desired. with the eye or loop t, is formed into an arc By my construction of the traction nech concentric with the pivotal supports D of the -anism, as before described, the toothed chains 75 o boiler upon the axle C, so as to permit a lat FF are adapted to engage very firmly with the eral oscillation of the truck beneath the surface of the ground, and any accumulation boiler. ... " 4. of dirt or of snow and ice which may adhere The operation of my improved.device is as to the chains will be pushed out of the links follows: The operator upon the front plat by the teeth of the wheels G. G. G. and G' G' form S runs the engines OO so as to rotate as the chains pass over said wheels, the trac the crankshafts N N in opposite directions, tion-chains being thereby kept clean and pre as shown by the arrqws in Figs. 2 and 4, and vented from clogging, this clogging or filling motion is communicated thrg the univer up of the traction-teeth being a very great sal connections m m, shafts MM and M'M, defect found in devices of this nature as here 2C and universal connections L'L' to the shafts tofore constructed. - jj of the front truck. The pinions JJ, car My improved form of traction-engine is ried by said shaftsii, are thereby actuated, very easily operated, and, by the arrangement. and they drive the bevel-gears II' and the of the driving-chains and the traction mech shafts II, carrying the pinions h h, which in anism for actuating the same, is adapted to turn drive the wheels Hupon the axles of the be used upon roads where devices of ordinary .90 s wheels G. G. This operation transmits mo construction could not be used, while by the tion to each of the traction-chains FF upon arrangement of the power-transmitting mech the front truck over gears G, G', and E. By amism the machine is particularly adapted the diagonally-arranged shafts KK and K for turning in very small spaces. - 30 K', together with their universal-joint con If desired, but one of the trucks may be pro 95 nections with the shafts if upon opposite vided with traction mechanism and the other sides of the front and rear trucks, motion is truck arranged to trail after it. transmitted from the gearing upon each side Many of the details of construction may be of the front truck to the gearing upon the variously modified without in any way affect CO 35 opposite side of the rear truck, the arrange ing the merits of my invention, and I there ment of the wheels G, G', and E being the fore do not desire to limit myself to the ex same upon both front and rear trucks. A act form of construction shown and described. uniform forward movement is thus given to Having thus described my invention, what all the traction - chains FF to propel the I claim is 49 vehicle straight ahead. If it is desired to 1. In a traction-engine, one or more trucks, IC5 turn the machine to one-side, the engine each provided with a single traction-wheel O upon the side toward which it is desired upon each side, traction-chains trained over to turn is either stopped or retarded in its said traction-wheels, and means for giving in i the engine upon the opposite side of dependent longitudinal motion to said chains, I to 45 the platform being permitted to continue. substantially as set forth...... its movement. This operation serves to re 2. A traction-engine comprising one or more tard the movement of the traction mechanism trucks, each provided with a single traction ... upon one side of the forward truck and wheel upon each side thereof, traction-chains the traction mechanism upon the opposite trained oversaid traction-wheels, and driving 50 side of the rear-truck, the remaining portions. mechanism comprising suitable gearing and I is of the fineehanism continuing their move independently actuated sprocket - wheels ment as before. The tracks will thereby be adapted to engage with said traction chains is caused to turn at differentangles to the boiler, and to give a longitudinal movement thereto, so as to ran the one toward the right and the substantially as set forth...... SS other toward the left, thus enabling the ma-. 3. In a traction-engine, a truck pivotally en chine to be turned in a very limited space. gaged with the boiler-support, traction-wheels By the arrangement of the diagonal shafts K located upon opposite sides of said truck, K', as before described, the same being com sprocket-wheels located in advance and in posed of sections, slidingly engaged with each rear thereof, traction-chainstrained over said so traction and sprocket wheels upon each side 25 other, said diagonal shafts are adapted to au of said truck, and means for giving an inde matically adjust themselves to the positions. pendent rotation to one of the sprocket-wheels of the trucks in an obvious manner. Simi upon each side of the truck, substantially as larly the shaftsMM are automatically length and for the purposes set forth. ened or shortened when the trucks are turned, 4. In a traction-engine, a truck pivotally 8s 130 so as to correspond with the positions of the aged with the boiler-support, said truck-be trucks. Any convenient means for retarding ng provided upon each side with a tractious the motion of the engine O at either side of wheel loosely mounted upon an axle, said a.

484,828 8 10. In a traction-engine, the combination, traction-wheels being provided with periph with the boiler and a truck pivotally engaged eral grooves or channels, toothed traction therewith, of a platform secured to the boiler chains trained over said wheels and arranged and provided with independently-operating to lie within said grooves or channels, sprock-. engines, independent traction devices located et-wheels located in advance and in rear of upon opposite sides of said truck, flexible said traction-wheels and engaging with said. connections between said independent en chains, and suitable means for giving inde gines and said traction devices, and means 75 pendents rotation to one of said sprocket-. for retarding the motion of one of said en wheels upon each side of the truck, substan gines without affeeting the operation of the O tially5. In as a settraction-engine, forth. a truck pivotally en other,11. Atraction-engine substantially as described. comprisingtruckspivo - gaged with the boiler-support, said truck be otally engaged with the boiler-supports, each ing provided on each side with a traction-wheel of said trucks provided with independently loosely mounted upon an axle, said traction actuated traction devices upon its opposite wheels being provided with peripheral grooves sides, mechanism for transmitting motion or channels, toothed traction-chains trained from the traction device upon each side of over said wheels and arranged to lie within one truck to the traction device upon the op 85 said grooves or channels, sprocket-wheels, lo posite side of the adjacent truck, a platform cated in advance and in rear of said traction secured to the boiler and provided with inde wheels and engaging with said chains, one of pendently-operatingengines, and flexible con said sprocket-wheels upon each side of the nections between said engines and the trac truck being mounted upon a stud-shaft slid 90 ingly engaged with the truck-frame, and suit tion mechanism upon one of said trucks, sub able means for giving independent rotation stantially12. In a as traction-engine, described. . .the . . combination, to the other sprocket-wheel upon each side of with the boiler and a truck pivotally engaged 25 the truck, sullustantially as set forth. therewith, of a platform secured to the boiler 6. A traction-engine comprising trucks piv and provided with independently-operating 95 otally engaged with the boiler-supports, each engines, independent traction devices located of said trucks provided with independently upon opposite sides of said truck, flexible con actuated traction devices upon its opposite nections between said independent engines sides, and mechanism for transmitting motion and said traction devices, and a reciprocat from the traction device upon each side of ing bar provided with friction devices at its O one truck to the traction device upon the op opposite ends adapted for engagement with posite side of the adjacent truck, substantially the engine upon either side of the platform, as set forth. " . . and a lever for throwing said friction devices 35 7. A traction-engine comprising trucks piv into or out of operation, substantially as de otally engaged with the boiler-supports, each Io5 of said trucks provided with independently scribed.13. A traction device for road-engines, com actuated traction devices upon its opposite prising a traction-wheel, sprocket-wheels ar sides, and mechanism for transmitting mo ranged to revolve in the same plane with and tion from the traction device upon each side of upon opposite sides of said traction-wheel, one truck to the traction device upon the op one of said sprocket-wheels being operatively o posite side of the adjacent truck, said mech engaged with suitable driving mechanism, anism comprising revoluble shafts composed and a traction-chain trained over said trac of two or more sections slidingly engaged 45 with each other and having universal-joint tion and sprocket wheels, substantially as connections with said traction devices at its set forth. IIS front and rear ends, substantially assetforth. 14. A traction device for road-engines, com 8. A traction-engine comprising trucks piv prising a traction-wheel loosely journaled otally engaged with the boiler-supports, each uponential an groove, axle and two provided sprocket-wheels with a circumfer arranged of said trucks provided with independently to revolve in the same plane with but upon actuated traction devices upon its opposite sides, mechanism for transmitting motion oppositeof said sprocket-wheels sides of said traction-wheel being operatively and one en from the traction device upon each side of gaged with suitable driving mechanism, and one truck to the traction device upon the op a traction-chain trained over said traction posite side of the adjacent truck, and means and sprocket wheels, substantially as set for preventing vertical oscillation or play of said trucks, substantially as described. forth,In testimony that. I clainw the foregoing I 9. In a traction-engine, the combination, have hereunto set my hand, at Morris, in the with the boiler and a truck pivotally engaged county of Shawano and State of Wisconsin, therewith,and provided of a withplatform independently-operating secured to the boiler in the presence of two witnesses. engines, independent traction devices located DAVID s. STEwART. upon opposite sides of said truck, and flexi Witnesses: ble connections between said independent D. E. WEscort, engines and said traction devices, substana . A. O. Wiseries tially as described.