US2109793A - Road machine - Google Patents

Description

March 1, 1938.

ROAD MACHINE Filed April 21, 1952 7 Sheets-Sheet l INVENTOR. Carl 0. Gu57'0f50/7 c. A. GUSTAFSONQ 1 3" March 1, 1938. c. A. GUSTAFS'ON ROAD MACHINE Filed April 21, 1932 .7 sh ets-sheet 2 NWN QWN

A TTORNE).

' INIQENTOR (qrl l7. fius T075500 March 1', 1938.

C. A. GUSTAFSON ROAD MACHINE 7 Sheets-Sheet 3 Filed April 21, 1952 INVENTOR. Carl )7. ausTafson BY ATTORNEY 7 Sheets-Sheet 4 March 1, 1938- c. A. GUSTAFSON ROAD MACHINE i Filed A ril 21, .1932

a 36 Q a f N TTORNM March 1, 1938.

c. A. GU STAFSON ROAD MACHINE Filed April v 21, 1932 Ill! TIIIIIIIIIIIIIIII 0111111 4? u h-E "'INKENTOR. Carl- 9. Gus 7 /3 7 Sheets-Sheet 6 March I, 1938. c. A. GUSTAFSON ROAD MACHINE 7 Shets-Sheet 7 Filed April 21, l932 INVEN TOR. [4H 6. Gus 76/5017 B Y A TTORIQ;

Patented Mar. 1 1938 UNITED STATES,

ROAD MACHINE Carl A. Gustafson, Minneapolis, Minn., assignor to Caterpillar Tractor 00., San Leandro, Calif., a. corporation of California.

Application April 21, 1932, Serial No. 606,643

24 Claims.

INTRODUCTION Ihis invention relates to graders, and more particularly to graders having elevating carriers. Machines of this type are adapted for use in earth moving jobs such as filling dump wagons, excavating ditches, casting in road grades directly from the ditch to the grade, building levees,

etc., and such machines comprise generally a supporting frame in which is mounted a plow and an elevating carrier for elevating and discharging earth which is cast thereupon by the plow. It is necessary in such work that the carrier be raised or lowered to change the delivery of the earth to the wagon or to the grade and to provide proper delivery of the earth thereupon from the plow. In such machines the plow must also be adjusted to vary its cutting angle and to change the depth of the cut.

1e grader is usually drawn by a tractor and in order to keep the grader in constant eficient operation as the train moves steadily along the attendant stationed on the grader must be able to adjust quickly the positions of the plow and 5 the carrier and to control the power drive of the carrier. In short, the efiiciency of the grader as an earth-handling machine depends largely on the speed and precision of the controls for the working mechanism. For example, it is often 39, desirable that the adjustments of the plow and the carrier be made simultaneously, or that both ends of the carrier be adjusted at the same time. Such simultaneous adjustment is not possible with the hand operated controls found in machines heretofore known, due to the fact that the heavy plow frame and the heavy carrier cannot be adjusted with ease, and also to the fact that such hand controls are so separated as to preclude simultaneous operation thereof. In 4,0 such known machines most of the operators attention is required for the efiort of making the adjustment rather than observation of the part being adjusted to ascertain when it has reached the proper positon. Hand operated controls also 45 have the disadvantage of making any adjustment slow and in the increased effort required from the operator for adjustment during operation of the machine.

The present invention overcomes these disad- 50 vantages by providing power operated control whereby a quick and positive adjustment of the plow and the carrier is assured, the operator is relieved of the Work required to make the ad justment so that his attention can be directed 55 to securing proper adjustment of the plow and of the carrier, and adjustments can ,be made simultaneously and without stopping the carrier.

In the present invention the power unit is installed on the grader, thereby giving the operator control of the speed of the carrier belt and the. speed with which adjustments are made. While this feature is advantageous, it is not necessary as the power controls and thecarrier can be operated by a power take-off from the traction vehicle.

Another disadvantage present in elevating. carriers heretofore known is that in handling loose, bulky or slippery material the carrier could not be raised to as steep an angle as is sometimes desirable, due to the back-slipping of the material which is being elevated, which also limited the capacity of the machine. These disadvantages areeliminated in the machine embodying the instant invention by providing a carrier belt which prevents slippage of material with respect thereto.

Another advantage present in applicants improved elevating grader is that the belt adjusting mechanism is easy to operate, is capable oi, operation while the carrier belt is elevating material, and provides a finer adjustment for varying the tension on the belt.

STATEMENT or INVENTION It is an object of the invention to provide machine controls in an elevating grader which are positive in their operation and which respond quickly to manipulation thereof.

Another object of the invention is the provision of power operated control means for elevating graders.

Another object of the invention is to provide controls for power operated adjusting means in an elevating grader which are grouped near the operators station. I

Another object of the invention is the provision of power operated control means for ad justing an adjustable elevating carrier.

Another object of the invention is the provision of manually operable control meansfor connecting carrier adjusting means to a source of power. 7 -'Another object of the invention is the provision of manually operable control'means 0perable by a single manual stroke to connect a plurality of carrier adjusting means to a source of power. v

Another object of the invention is the provision of power operated means for adjusting a plow.

Another object of the invention is the "provision of manually operated means for connecting plow adjusting means to a source of power.

Another object of the invention is the provision of power operated means for adjusting a plow and means for varying the effect of said adjusting means.

Another object of the invention is to provide an improved carrier belt for elevating graders.

Another object of the invention is to provide means for preventing slippage of the material carried by a conveyer belt.

Another object of the invention is the provision of improved means for adjusting the tension on an endless carrier belt which is capable of operation while the carrier belt is in use and which is easy to adjust.

Other objects will appear as the description of the machine progresses.

DESCRIPTION or FIGURES Fig. 1 is a left side elevation of the grader with certain parts broken away.

Fig. 2 is a rear elevation of the grader with certain parts broken away.

Fig. 3 is a plan view of the grader with certain parts broken away.

Fig. 4 is a plan view of a portion of the carrier belt showing the belt splice.

Fig. 5 is a perspective view of a portion of the carrier belt.

Fig. 6 is a section taken on the line 6-6 in Fig. 4.

Fig. '7 is a section taken on the line 'I-'I in Fi 4.

Fig. 8 (sheet 2) is an enlarged partial front view of the upper carrier showing a portion of the carrier belt tightening means.

Fig. 9 is an enlarged section through the flywheel clutch assembly.

Fig. 10 is an enlarged vertical section through the control gear box.

Fig. 11 is an enlarged vertical section showing a portion of the drive transmitting train for the control gear box.

Fig. 12 is a view taken on the line I 2I2 in Fig. 11.

Fig. 13 is a view taken on the line I 3-l3 in Fi 10.

Fig. 14 is a vertical section through the auxiliary plow control gear box.

Fig. 15 is a detail View of certain drivetransmitting assemblies.

DESCRIPTION or MACHINE Frame (Series 1 to 99 reference numerals) The frame of the machine comprises a longitudinal channel I, forming the left side frame member as viewed from the rear of the machine (Figs. 1-3), channels 2 and 3, forming in part the right side frame member, front cross channel 4 secured to the front ends of channels I and 2, and rear cross channel 5 secured to the rear ends of channels I and 3. The inner ends of channels 2 and 3 are rigidly connected in a manner to be hereinafter described. Central cross channels 0 (Fig. 1) and 'I (Fig. 2) are connected at their left ends to longitudinal channel Iand at their right ends to the inner ends of channels 2 and 3, respectively.

The front end of the frame is supported by forward extensions 8 (Figs. 1 and 3) which are secured to channels 4 and 6 and bent downwardly and 3. The left rear end of the frame is provided with angle I I, secured at its upper end tochannels I and 5, and at its lower end to cross angle I2. A similar upright angle (not shown) is provided at the junction of channels 3 and 5. Cross angle I2 is secured to the rear wheel and axle assembly I3 indicated generally in Figs. 1-3. No detailed description of the wheel and axle assemblies will be given herein as they form no part of the instant invention.

The frame is braced by four diagonal angles I 4 having their outer ends secured to the side frame channels, their inner ends gusseted to gether, and being secured intermediate their ends to forward extensions 8 and cross channels 6 and I.

Upright angles 2| (Figs. 2 and 3) are secured to the inner ends of channels 2 and 3, and channel 22 secured to said angles serves to complete the right longitudinal frame member of the machine.

A pair of upright angles 26, forming posts, are secured to channels 2 and 22 and channels 3 and 22, respectively, and said posts'serve to support certain adjusting mechanisms which are described hereinafter. Inclined angles 21 are secured at their upper ends to posts 26 and at their lower ends to cross channels 6 and 'I, respectively, by suitable brackets. Suitable bracing members are provided to support said angles 21 intermediate their lengths.

Horizontal angle 3I (Figs. 2 and 3) is secured at its right end to rear angle 21, and is supported intermediate its ends by post 32 rising from side channel I (Figs. 1 and 2). Gusset 33 serves to brace post 32 and angle 3|. The outer end of angle 3! is secured to longitudinal angle 34 which is supported at its forward end by angle 31 which is supported by post 36 secured to channels I and 4. Bent angle 31 (Figs. 1 and 3) is secured at its lower end to channel 4 and forms a support for a portion of theplow adjusting mechanism as described hereinafter. Angle 34 is supported intermediate its ends by post 38 (Fig. 1).

A pair of inclined angles 0| (Fig. 2) are secured at their upper ends to channel I and channels 6 and I, respectively, and near their lower ends to posts 26. A pair of inclined angles 42 are secured at their lower ends to the respective ends of angles 4| and at their upper ends to posts 26 as shown in Fig. 2. Said angles 42 serve as guides for the carrier center lifting mechanism as described hereinafter.

Motor 6I (Figs. 1-3) is supported near its ends by cross channels 4 and 6 and near its center by angle 68 secured to channels I and 2. Said motor BI may be of any conventional type. The throttle control for motor 6| comprises rod 63 (Figs. 1 and 3) attached to control handle 64 (Figs. 1-3), the adjustment of which is maintained by a pawl having operating handle 66 and engaging fixed ratchet 61.

Platform 52, secured tochannels I and 3 at the rear of the machine, provides an operators station from which operation of the grader is controlled, as is more fully described hereinafter.

Plow assembly (Series 100 to 199 reference numerals) The plow frame comprises channel IOI (Figs. 1-3) which carries plow I26 in a manner to be hereinafter described, and is adjustably supported from the frame of the grader. Channel IN is provided with strap I02 at its forward end to which clevis I03 carrying sheave I04 is attached by hanger and spring assembly I 06. Chain I07 fixed at one end to angle 34 runs over sheave I04 and a sheave I08 secured to bent angle 31 (Figs. 1 and 3) and the other end of said chain is secured. to shaft 441 to be more fully described hereinafter.

The rear end of channel IN is held between yoke III and clamp II2, which are bolted to each other and to channel IOI (Figs. 1 and 2). Clamp I I2 is supported by hanger and spring assembly II3 from clevis II4 carrying sheave II6. Chain H1 secured at one end to angle'34 passes over sheave H6, and is secured at its other end to shaft 453.

From the foregoing description it is seen that,

plow frame channel IN is adjustably supported at its front and rear ends so that it may be raised or lowered bodily with respect to the ground or its inclination may be changed with respect thereto by selective rotation of shafts 441 and Plow I26 is mounted oh plow standard I21 which is secured to channel IOI by clamp I28, being braced with respect thereto by brace I29 (Fig. 1).

A draft connection is provided from front wheel and axle assembly I0 to channel IM and plow I26. Angles I36 (Figs. 1 and 3) are-secured to channel IOI intermediate its ends and journaled in said angles is a pivot I31 (Fig.- l) on which I-beam I38, (Figs. 2 and 3), comprising a plow drawbar, is pivoted, said I-beam I38 being releasably secured to the grader frame at its other end. Adjustable connection I42 serves to hold I-beam I38 in the proper angular relation with channel IOI. Chain I39 (Figs. 1 and 3) is secured to the front axle and to clevis I M which is pivoted to I-beam I38, thereby providing a draft connection from the front axle to the plow frame.

The rear end of channel IOI, is adjustable with respect to the line of draft by means of bar I43 (Fig. 2) secured at one end to clamp H2 and at the other end to a frame member (not shown).

Carrier assembly (Series .200 to 299 reference numerals) 1 Carrier 20I comprises upper carrier or section 202 and lower carrier or section 203 pivotally joined at 204; each of said sections is provided with sideboards 206 to guide the material being elevated, said sideboards 206 being supported by brackets 201 from side frame members 208 conover said sheaves 2I8, and sheaves 22I looselymounted on shaft 222 which is 'securedto inclined angles 21. Said chains 2 I 9 have their other ends secured to shaft 423, which is rotated in a manner hereinafter described to wind or unwind said chains 2 I 9, thereby raising or lowering upper carrier or section 202.

, Means are provided for adjusting lower car-- rier or section 203 to vary the position of said section with respect to the ground and to vary the inclination at which material is elevated. A pair of chains 23'I (Figs. 1 and 3) have -their lower ends secured to side members 208 of lower section 203 and passover idler sheaves 232 loosely mounted on shaft 233, said shaft being supported by cross channels 6 and 1. Said chains 23I havetheir upper ends secured to shaft 431 suitably supportedon inclined angles 21 as described hereinafter. Shaft 431 is rotated by means to be described hereinafter to wind or unwind chains 23I,-

thereby raising or lowering section 203.

Means are provided for adjusting the carrier.

pinions 241 fast on shaft 248, suitablyjournaled Shaft .248 is provided at its rear end with gear-249 (Figs. 2-

in bearings mounted on posts 26.

and 3) which meshes with pinion 25I integra1 with hand-wheel 252 slidably and rotatably mounted on transverse shaft 253, also journaled in suitable bearings on posts 26 and 2|, Upon rotation of shaft 248 by hand-wheel 252, bars 24I are raised or lowered, thereby adjusting said carrier center. Ratchet wheel 254 (Fig. 3) cooperates with a suitable pawl (not shown) to maintain the adjustment of the carrier center in a well-known manner.

Means are provided for driving an endless carrier belt hereinafter described so that material cast thereon by plow I26 at the lower end of the carrier will be elevated and discharged at the upper end thereof. Shaft 26I (Figs. 2 and 3) adjustably mounted in frame members 208 of upper section 202 carries drum 262'wnich drives said carrier belt. Roller 263 (Fig. 2) is journaled in the lower ends of said frame members 208 of lower section 203, and intermediate drum 26-2 and roller 263 a plurality of idler rollers 264 are provided to support the upper stretch of said carrier belt. Drum 262 and shaft 26I are driven by chain 261 (indicated diagrammatically in Figs. 1-3) which engages sprocket wheel 266 fast on shaft 26L Said chain 291 passes over idler sprockets268 and engages and is driven by sprocket wheel 269 fast on shaft 2" (Fig. 2) journaled in-a suitable housing mounted on a frame bracket. Sprocket wheel 213 also fast on shaft 21I, is engaged and driven by chain 214 (also indicated diagrammatically) which engages sprocket wheel 216 fast on shaft 329. Said shaft 329 andthe drive therefor from motor 6I are more specifically described hereinafter.

As pointed out hereinbefore, inclined carriers of the type provided in elevating graders are limited in capacity by the character of material being elevated, loose, bulky or slippery material being inclined to slip back. Thus, not only is the angle of inclination of the carrier limited but theentire capacity of the grader is limited when any slippage of the material occurs. In applicant's improved elevating grader these difficulties are overcome and the. permissible angle of inclina tion ofthe carrier is increased for all types of material conveyed, and the capacity ofthe machine as a whole is increased by the provision of a new and advantageous belt construction which is par ticularly adapted for use in elevating graders.

Belt "286 (Figs. 4-7) comprises an underlayer 28I (Figs. S and 6) of rubber, a relatively thick intermediate layer 282 consisting of a plurality of sheets of fabric andrubber, and an upper layer 283 of rubber in which transverse corrugations are integrally formed by means of a die. The

Bars 24I are above described layers are vulcanized together to form a relatively thick laminated belt. The ends of said belt 280 are spliced togetherby means of hinges 284secured to the ends of said belt by bolts 285.

Means are provided for adjusting the carrier belt whereby the tension thereon may be varied at any time by the operator. Shaft 26| which carries drum 262 is journaled in bearings 286 (Figs. 3 and 8) mounted on. a pair'of slides 281 (Figs. 2, 3 and 8) which are supported on respective side frame members 208 of upper-section 202 by guides 288 bolted to said frame members. Each slide 281 is provided at its outer end with bracket 289 having bearing 290 in which one end of roller 29| is journaled, the other end thereof being journaled in similar bearing 230 secured to slide 281 near the inner end thereof. Rollers 29| brace slides 281 and also serve to support carrier 20| when said carrier is lowered against a wagon.

Each slide 281 is provided at its inner end with boss 292 which is engaged by the nut on bolt 293. Chain 294- secured to bolt 293 at one end is fastened at its other end to cam 295 fast on shaft 296. Rotation of shaft 296 in a clockwise direction as Viewed in Fig. 8 winds chains 294 about cams 295 thereby pulling slides 28'! forwardly carrying drum 262 therewith whereby the tension on belt 280 is increased.

Means are provided to rotate shaft 296 to tighten or loosen belt 280 by adjusting the tension thereon. Chain 291 is fastened at one end to sheave 298 (Fig. 8) on shaft 296 and passes over idler sheave 299 mounted on forward post 26, having its other end secured to shaft 253 (Fig. 3) Shaft 253 is provided at its rear end with clutch element 255 which is adapted to engage a complementary clutch element on handwheel 252 when said wheel is shifted rearwardly on shaft 253. Turning of hand-wheel 252 in its rearward position serves towind or unwind chain 291 about shaft 253 whereby chains 294 are wound or unwound about cams 295 to tighten or loosen carrier belt 286. It will be recalled that hand-wheel 252 also controls the carriercenter lift.

This type of belt tightening apparatus is particularly advantageous in that only a minimum portion of the carrier assembly need be'movecl to make the adjustment, thereby securing easy operation, and in that the adjustment may be readily made while the carrier belt is in use. The construction thereof is also substantially simplified over known forms of belt tighteners.

Power control (Series 300 to 499 reference numerals) and is provided at its outer end with a fingeredaperture adapted to receive bolt 309 which passes through an aperture in plate 301 and i's'pivoted to plate 3| Spring 310 surrounding bolt 309 tends to hold lever 308 in the position shown in Fig. 9. Three levers 308 are provided but only one of said'levers is illustrated in Fig. 9. Plate 3 is being held therein by the end of lever 306.

(Fig. 9) of motor 6| is seprovided with teeth which mesh with internal teeth formed on flange 306 of flywheel 302, whereby said plate 3| rotates with said flywheel 302 but is shiftable with respect thereto. A plurality of compression springs 3|2 are provided which press plate 3 towards said flywheel 302; said springs 3|2 are seated in plate 301 and engage projections on plate 3| Only one of said springs is shown in Fig. 9.

Plate 3|6 riveted to hub 3|1 splined on tubular shaft 3|0 is provided with clutch faces 3|9 of suitable composition, said faces 3|9 being adapted to be engaged by the respective clutching faces of flywheel 302 and plate 3.

From the foregoing description, it is seen that when lever 308 is in the position shown in Fig. 9, springs 3| 2 press plate 3 inwardly whereby clutch faces 3| 9 on plate 3|6 are gripped between the respective clutching faces of flywheel 302 and plate 3H, transmitting the drive therefrom to hub 3|1 and tubular shaft 3|8, said shaft 3|8 being supported by bearing 32| in flywheel 302 and by bearing 322 in housing 325.

Gear 323 keyed on tubular shaft 3|8 meshes with gear 324 keyed on stub shaft 326, said shaft 326 being supported in housing 325 by bearings 321' and 328. Shaft 329, the drive shaft for the carrier belt drive, is driven from shaft 326 through releasable connection 33I.

It is seen, therefore, that the drive for the carrier belt is controlled by movement of plate 3 as determined by movement of levers 308. The inner ends of levers 398 (Fig. 9) are bent and bear against the face of ring 336 surrounding tubular shaft 3|8 but not engaged therewith. Ring 336 is mounted in cage 331 by bearing 338, Cage 331 is resiliently held against the wall of housing 325 by compression springs 34| held between flange 342 of said cage 331 and washers on the end of bolts 343, which pass freely through said flange and have threaded engagement with the wall of housing 325. Cage 331 when moved forwarclly presses ring 336 against the inner ends of levers 308 whereby said levers are rocked to move plate 3 to the right as viewed in Fig. 9, thereby interrupting the drive for the carrier belt.

Movement of cage 331 is controlled by a pair of arms 346 on shaft 341, and engaging the shoulder on said cage 331v Only one of said arms 346 is seen in Fig. 9. Shaft 341 is journaled in housing 325 and extends therethrough to the right as viewed from the rear of the grader, and arm 348 (Fig. 1) secured thereon is connected by rod 349 with a crank on shaft 352 (Figs. 1 and 3) carrrying clutch control lever 359.

From the foregoing description it is seen that the operator can control the drive for the carrier universal connection 359; said shaft 358 enters, the base of housing 36| supported by bracket 362 on channell (Figs. 1 and 2). Shaft 358 carries worm-363 (Figs. 11 and 12) which engages worm wheel 364 (Fig. 12) fast on vertical shaft 366.

Bevel gear 361 keyed to shaft 366 at its upper end within gear box housing 368, meshes with bevel gears 3H and 312, rotatably mounted on shaft 313, journaled in housing 368. Thus it is seen that bevel gears 311-312 are rotated in opposite directionsuponrotation of shaft 366 and gear 361. Hubs 314 and 316 of gears 311 and 312, respectively, are formed with clutch teeth adapted to be engaged by complementary clutch teeth on double faced clutch element 311 which'engages splined portion 318 of shaft 313.

Clutch element 311 is provided with a peripheral groove engaged by fork 319 secured to rod 381 slidably mounted in housing 368. Rod 381 is provided at its front end with a notch '382 which is engaged by spring pressed 'ball 383 when said shaft is in its central position, wherein clutch element 311 is disengaged from both gears 311 and 312. Rod 381 is pivoted at its rear end to control lever 384 (Fig. 10), said control lever being conveniently pivoted in housing 368.

Spur gear 386 (Fig. 13) integral with bevel gear 311 meshes with spur gear 381 rotatable on shaft 388, and spur gear 389 rotatable on shaft 390. Spur gear 391 integral with bevel gear 312 meshes with spur gear 392 on shaft 388 and spur gear 393 on shaft 390.

Spur gears 381 and 392 on shaft 388 are provided with clutch teeth adapted to cooperate with double faced clutch element 394 slidable on splined portion 396 of shaft 388, and controlled by lever 391 (Figs. 2 and 3) identical in construction with control lever 384.

Spur gears 389 and 393 on shaft 390 are similarly provided with hubs 401402 formed with clutch teeth adapted to cooperate with complementary clutch teeth on double faced clutch element 403 slidably engaged with splined portion 404 of shaft 390, said clutch element 403 being controlled by lever 406 (Figs. 2 and 3), identical in construction with levers 384 and 391.

From the foregoing description it is seen that control lever 391 upon forward or rearward movement selectively'controls rotation of shaft 388 in either direction. Similarly, lever 384 determines rotation of shaft 313 selectively in either direction, and lever 406 similarly controls shaft 390.

Shaft 388 is connected 'to shaft 411 (Fig. 3) by universal connection 412 and said shaft 411 is connected by universal connection 413 to shaft 414 journaled in housing 416, mounted on in-' clined angle 21. Shaft 414 (Fig. 15) carries bevel pinion 411 meshing with bevel gear 418 on shaft 419 also journaled in housing 416. Shaft 419 carries worm 421 engaging worm wheel 422 on shaft 423 (Figs. 3 and 15) said shaft 423 being journaled at its ends in housing 416 and in bearing 424 mounted on respective inclined angles 21. As described hereinbefore, chains 219 wind and unwind about shaft 423 to control raising and lowering of upper carrier or section 202. It is seen, therefore, that movement of control lever 391 controls the adjustment of said upper carrier. It is to be noted that worm 421 and worm wheel 422 transmit the adjusting drive and also serve to maintain the adjustment of upper section 202 in that worm wheel 422 is driven by worm 421 but cannot drive said worm.

Shaft 313 is connected by universal connection 431 to shaft 432 which is connected at its other end by universal connection 433 to shaft 434 journaled in housing 436 mounted on inclined angle 21. Said housing 436 encases a drive assembly identical in construction with that contained in housing 416 heretofore described and illustrated in Fig. 15. Said drive assembly drives shaft 431 to which chains 231 for adjusting lower carrier 203 are secured. It isseen, therefore,

that'forward or rearward movement of control lever 384 determines raisingor lowering of 'said lower carrier 203. T. V i

Shaft 390, controlled by'lever 406, is connected by spider connection 441 with shaft 442 journaled in housing 443 (Fig. 14) mounted on angle 34 (Fig. 1). Worm 4'44 keyed on shaft 442 engages worm wheel 446 fast on shaft 441 journaled in said housing 443. Said shaft 441 extends through said housing 443 to the left as viewed from the rear of the grader and chain 101 for adjusting the front end of plow channel 101 is secured to said shaft 441. I 1

Worm 451 (Fig. 14) rotatably' mounted on shaft 442 engages'worm wheel'452 fast on shaft 453 journaled in'said housing 443 andextending therethro'ugh" parallel to said shaft 441. Chain 111 for adjusting the rear end of plow channel 101 is secured to shaft 453. Worm 451' is provided at its front'end with clutch teeth 456 adapted to be engaged by complementary clutch teeth 451 on 'clut'ch element 458 slidable on splined portion 459 of shaft 442. Clutch element 458 is provided with peripheral groove461 jwhich receives pins 462 on a pair ofintegral arms 463 secured to shaft 464 journaledin' 'said housin 443. Only one of said arms 463 is illustrated in Fig. 14. Control lever 465 is secured on shaft 464 outside of housing 443. g a

Fromthe foregoing description it is seen that with control lever 465 in its rearward position, manipulation of the control lever 406 determines raising or lowering of both ends of plow channel .101 whereby the depth of cut of plow 126 maybe varied, or said plow 126 may be disengaged from the earth. If said control lever 465 is moved to its forward position, the drive for shaft 453 is interrupted whereby, upon'manipulation of lever 406, only the front end of'plo'w channe1 101 is raised or lowered. In this manner theangle of inclination of plow 126 with respectjtothe earth may be varied. I

- In the foregoing description a plurality of new and advantageous features have been described, all of which contribute to easier andmore efficient operation of the grader. The power operated controls. enable the operator toadjust readily and simultaneously the positions of the plow and the 'carrienwhereby no delay-is en' countered during operation and the grader is at all times adjusted properly for the'most efficient operation. The belt tightening mechanism described herein provides an easier and more sensitive adjustment of the tension on the belt whereby said belt is always operating 'at the proper tension. Moreover the controls for the abovementioned adjusting mechanisms as well as the throttle and clutch controls, are allconveniently located at the operators station so that the operator is in constant command of the grader. The new carrier belt constructiondisclosed herein contributes to more efficient operation of the grader by preventing back-slipping of the material being elevated whereby a' greater quantity of material is delivered and the permissible inclination of the carrier is increased- While my invention has been described "with reference to the preferred embodiment thereof, it is to be understood that my invention i "not limited by the Specific construction of such embodiment, but is limited only by the scope of the appended claims. I

I, therefore, claim as my invention:

1. In an elevating grader, a frame; a carrier having a belt and a driving train-therefon 'aset' rier to a shaft mounted on said frame, a second set of chains connecting the lower end of said carrier to a second shaft mounted on said frame, a plow, a set of chains connecting said plow to third and fourth shafts mounted on said frame, a power driven shaft, a clutch connecting said power driven shaft and said driving train, a fifth shaft driven by said power driven shaft, a gear box comprising sets of oppositely disposed intermeshing gears driven by said fifth shaft and having clutch teeth, each opposite pair of gears being rotatably mounted on a stub shaft journaled in said box and having a central splined portion, a double faced clutch element slidabie on said splined portion and having driving engagement therewith, a control lever associated with each clutch element adapted to shift said clutch element into clutching engagement with either gear of the associated pair, a driving connection from one said stub shaft to said first shaft, a second driving connection from a second said stub shaft to said second shaft, and a third driving connection from a third said stub shaft to said third and fourth shafts.

2. In an elevating grader, a frame, acarrier having a belt and a driving train therefor, a set of chains connecting the upper end of said carrier to a shaft mounted on said frame, a second set of chains connecting the lower end of said carrier to a second shaft mounted on said frame, a plow, a set of chains connecting said plow to third and fourth shafts mounted on said frame, a power driven shaft, a clutch connecting said power driven shaft and said driving train, a fifth shaft driven by said power driven shaft, a gear box comprising sets of oppositely disposed intermeshing gears driven from said fifth shaft and having clutch teeth, each opposite pair of gears being rotatably mounted on a" stub shaft journaled in said box and having a central splined portion, a double faced clutch element slidable on said splined portion and having driving engagement therewith, a control lever associated with each clutch element adapted to shift said clutch element into clutching engagement with either gear of the associated pair, a driving connection from one said stub shaft to said first shaft, a second driving connection from a second said stub shaft to said second shaft, and a third driving connection from a third said stubshaft to said third and fourth shafts, including a gear assembly providing a constant connection to said third shaft and a controllable clutch connection to said fourth shaft. F s w 3. In a machine of the class described, an adjustable tool, a plurality of adjusting means for said tool, means for actuating all of said adjusting means simultaneously including a reversible master clutch operable to establish a power drive to actuate said adjusting means in either one of opposite directions, and a secondary clutch for disabling at least one of said adjusting means.

4. In a machine of the class described, an adjustable tool, a plurality of adjusting means connected to said tool at spaced points, a reversible drive adapted to actuate all of said adjusting means simultaneously in either one of opposite directions, and a clutch mechanism for disabling at least one of said adjusting means.

5. In a machine of the class described, an adjustable tool, a plurality of adjusting means connected to said toolat spaced points, a reversible drive adapted to actuate all of said adjusting means simultaneously in either one of opposite vof chains connecting the upper end of said cardirections, means including a single control lever for disabling all of said adjusting means simultaneously, and additional means for disabling at least one of said adjusting means independent of said first mentioned disabling means.

6. In an elevating grader, an adjustable plow frame, a source of power, a plurality of adjusting means connected to said plow frame at spaced points, means for positively actuating all of said adjusting means simultaneously from said source of power to efiect raising or lowering of the entire plow frame uniformly with respect to the ground, and a clutch mechanism for disabling at least one of said adjusting means when it is desired to adjust the angle of the plow frame with respect to the ground.

7. In a device of the class described, a plurality of drive shafts, adjusting means operated by rotation of each drive shaft, a control shaft, constantly meshing gears between said control shaft and one of said drive shafts, a gear journaled about said control shaft, a gear meshing therewith and on another of said drive shafts, means for driving said control shaft, and means for optionally effecting driving connection between said latter two gears.

8. In a device of the class described, a plurality of drive shafts, adjusting means operated by rotation of each drive shaft, a control'shaft, constantly meshing gears between said control shaft and one of said drive shafts, a gear journaled about said control shaft, a gear meshing therewith and on another of said drive shafts, means for driving said control shaft, and means including a clutch element slidably mounted on said control shaft for optionally effecting driving connection between said latter. two gears.

9. In an elevating grader, 'a frame, a carrier adjustably mounted on said frame, self-locking means for adjusting one end of said carrier, self-' locking means for adjusting the other end of said carrier, a source of power, and selectively oper able means including independent reversible driving connections to each of said adjusting means for connecting said adjusting means to said source ofpower. I

10. In an elevating grader, a carrier compris ing an upper section and a lower section, a power driven shaft, means including a self-locking connection adapted to be' driven by said shaft for adjusting said upper section, means including a self-locking connection adapted to be driven by said shaft for adjusting said lower section,'and means including control members and. an independent reversible driving connection to each of said adjusting means and operable by a control member for enabling the drive for said upper section and said lower section adjusting means.

11. In an elevating grader, a power driven carrier belt, a source of power, means for driving said carrier belt from said source of power including a rotatable shaft and'clutching mechanism interposed between said source of power and said rotatable shaft, power operated means for adjusting the position of said carrier belt, other adjusting means for adjusting the position of mechanism other than said. carrier belt, and means for controlling the operation of all of said aforementioned adjusting means, including a second shaft connected for constant'rotation with said source of power and a unitary, selective clutch mechanism interposed between said constantly rotatable second shaft and said adjusting means.

12. In an elevating grader, a power driven carrier belt, a source of power, means for driving said carrier belt from said source of power including a rotatable shaft and clutching mechanism interposed between said source of power and said rotatable shaft, power operated means for adjusting the position of said carrier belt, other adjusting means for adjusting the position of mechanism other "than said carrier belt, means for controlling the operation of all of said aforementioned adjusting means, including a second shaft connected for constant rotation-with said source of power and a unitary, selective clutch mechanism interposed between said constantly rotatable second shaft and said adjusting means, and an operators station, said unitary, selective clutch mechanism being positioned adjacent said operators station.

13. In an elevating grader, a power driven carrier belt, a source of power, means for driving said carrier belt from said source of power including a rotatable shaft and clutching mechanism interposed between said source of power and said rotatable shaft, power operated means for constant rotation with said source of power and a unitary, selective clutch mechanism interposed between said constantly rotatable second shaft and said adjusting means, an operators station, said unitary, selective clutchmechanism being positioned adjacent said operators station, said first-mentioned clutching mechanism being positioned remote from said operators station and adjacent said source of power, and a control lever operatively connected to said clutching mechanism adjacent said source of power and positioned adjacent said operators station.

14. In an elevating grader, a source of power, power operated movable mechanism adapted for substantially constant operation, power operated adjusting mechanism adapted for non-constant operation, means for operating said movable mechanism including a shaft and clutching means interposed between said shaft and said source of power, and means for operating said adjusting mechanism, including a second shaft connected for constant rotation with said source of power and clutching mechanism interposed between said second shaft and said adjusting mechanism.

15. In a machine of the class described, an adjustable device, a plurality of adjusting means connected to said device, a source of power, means for connecting said adjusting means to said source of power, reversible clutching means operable to establish a power drive to actuate said adjusting means in either one of opposite directions for connecting or disconnecting all of said adjusting means simultaneously, and means interposed between said clutching means and said adjusting means for effecting adjustment of one of said adjusting means alone.

16. In an elevating grader, a plow frame, adjusting means connected to one end of said plow frame, adjusting means connected to an opposite end of said plow frame, a source of power, means for connecting all of said adjusting means to said source of power, clutching means for connecting or disconnecting all of said adjusting means simultaneously, and means for effecting adjustment of one of said adjusting means alone.

17. In an elevating grader; a power driven conveyor; a source of power; means for driving said conveyor from said source of power, including a rotatable shaft, and a releasable connection interposed between said source of power and said rotatable shaft; power operated means for adjusting the position of said conveyor; and means for controlling the operation of said adjusting erating saidadjusting means in opposite directions, and a second shaft interposed between said control box andsaid source of power, whereby a constantly available drive is providedfcr said tioninterposedibetween said source of power and said rotatable shaft; power operated means for adjusting the position of said conveyor; other adjusting means; and unitary selectively operable means for controlling the operation of all of said adjusting means,including a control box,

reversible drive establishing means in said control box and connected to said adjusting means for selectively operating said adjusting means in opposite directions, and a second shaft interposed between said control box and said source of power, whereby a constantly available drive is provided for said drive establishing means irrespective of the conditioning of said releasable connection.

19. In an elevating grader; a plurality of ad-, justing mechanisms for earth working means; a source of power; and means for operating said adjusting mechanisms together or individually including driving means connected with said source of power, and an independently operable and reversible driving connection between said driving means and each of said adjusting mechanisms.

20. In an elevating grader; an adjustable carrier; an adjustable plow; a source of power; adjusting mechanism for said carrier; adjusting mechanism-for said plow; and means for operating said adjusting mechanisms together or individually including driving means connected operable and reversible self-locking driving connection interposed between said driving means and each of said adjusting mechanisms.

21. In an elevating grader; an adjustable carrier; an adjustable plow; a source of power; a plurality of adjusting mechanisms for said carrier; adjusting mechanism for said plow; and means for selectively operating said adjusting mechanisms including driving means connected with said source of power, and a driving connection from said driving means to each of said adjusting mechanisms, each of said driving connections including independently operable reversible drive establishing means whereby any one of said adjusting mechanisms can be operated in either direction independent of the other of said adjusting mechanisms and also including self-locking mechanism for automatically holding the adjusting mechanism in the different positions to which it may have been adjusted. l 22. In an elevating grader; an adjustable carrier; an adjustable plow; a source of power; adjusting mechanism for said carrier; adjusting mechanism for said plow; and means for selectively operating said adjusting mechanisms including driving means connected with said source mechanism for said carrier; adjusting mechanism for said plow; a source of power for both said adjusting mechanisms and said carrier belt; means including a releasable drive establishing connection for connecting said source of power to said belt to efiect driving of said belt; and means for selectively operating said adjusting mechanisms including driving means connected with said source of power irrespective of whether the releasable drive establishing connection to said belt is engaged or disengaged, and a driving connection from said driving means to each of said ad.- justing mechanisms, each of said driving connections including independently operable reversible drive establishing means whereby any one of said adjusting mechanisms can be operated in either direction independent of the other of said adjusting mechanisms and also including self-locking mechanism for automatically holding the adjusting mechanism in the different positions to which it may have been adjusted.

24. In an elevating grader; a carrier having a belt; a plow; a source of power including an engine and a drive shaft extending from one end of said engine; driving means connected to said belt adapted for substantially constant operation and having a releasable connection with said drive I shaft; adjusting means for said carrier; adjusting means for said plow; and means for operating said adjusting means including a driven shaft connected for rotation from said end of the engine irrespective of whether said releasable drive connection is engaged or disengaged, an independently operable reversible driving connection to each of said adjusting means interposed between said driven shaft and said adjusting means, and self-locking means for each of said adjusting means.

CARL A. GUSTAFSON.

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