US1397011A - Road-wcrking machine - Google Patents

Description

4 SHEETS-SHEET I.

Patented Nov. 15, 1921.

l "INIA 7 'WHA IIIA N. s. AND A. J. MONROE. ROAD WORKING MAcH|NE. APPLICATION FILED JULY I9, 1919.

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. N. s'. AND A. 1. MONROE.

ROAD WORKING MACHINE. l APPLICATION FILED JULY I9, I9I9. 1,397,01 1'.

Patented Nov. 15, 192L N. S. AND A. LMONROE.

ROAD WORKING MACHINE. APPLICATION IILED IuLY I9. |919.

1 ,.397 ,'01'1 Y Patented Nov. 15, 1921.

4 SHEETS-SHEET 3.

N. S: AND A. J. MONROE. ROAD WORKING MACH'INE. APPLICATION H Len :uw 19, 1919.

1,397,01 1 Patented Nov. 15, 1921.

4 SHEETS-SHEET 4.

UNED STATES NATHANIEL S. MONROE AND ANDREW J'. JIONBOE, OF ARTHUR, LLNES.

Application filed July 19,

To all whom, t may concern:

Be it known that we, NATHANIEL S. MON- non and ANDREW J. MONROE, citizens ot the United States, residing at Arthur, in the county et Douglas and State of. Illinois, have invented certain new anduseful lmprovements in ROad-VOrking Machines, of which the following is a specification.

T his invention relatesto limprovements in road working machines and particularly to machines oli that class which are provided with rearwardly convergent scraper bars spaced apart at their rear ends to permit the passage therebetween of a portion of the surface dirt which is taken from the road by the action ot the scraper bars and moved in the direction ot the middle or' the road where it is packed and smoothed to form a crown. rlypes ot this class of machines are shown in Letters Patent ot the United States No. 1,131,409, issued to Nathaniel S. Monroe on March 9, 1915, and also in Letters Patent No. 1,133,876 issued to Nathaniel S. Monroe on March 30, 1915, and in Letters Patent No. 1,247,135, issued to Nathaniel S. Monroe, George W. Monroe and Andrew J. Monroe, November 20, 1917, and in the copending application of Nathaniel S. Monroe, Serial No. 824,163, filed March 12, 1914.

ln machines of this type the scraper bars are extremely heavy and it has been found to be difficult to control the spread of these bars and to rapidly collapse them when it is necessary to do so to avoid obstructions, or 'to enable the machine to pass over comparatively narrow bridges, and in emergencies.

One object o1- the present invention'is to effect improvements whereby the scraper bars can be perfectly controlled and adjusted as may be required, by one operative stationed on the machine, and without great manual exertion on his part and without the necessity of stopping the machine, and also by utilizing theV forward movement of the machine so that the front ends ot the scraper bars are lifted clear of the road surface, by the forward .movement ot the machine and by the swinging movement of the cranes occasioned thereby, and without the necessity et manually or otherwise operating the hoisting tackles which connect the scraper bars to the cranes, and thus causing the scraper bars to be collapsed or retracted 1n a very short space of time and by a very slight forward movement of the machine.

le machines 0f this tyre it has been 01,111@

Specification of Letters Patent.

`combination and arrangement latented N ov. 15, 1921.

1919. serial no. 311,926.

that the rear axles, because ot the great stresses to which they are subjected are liable to be sprung or slightly thrown out oi' alinement and to hence cause the rear wheels to also get out of line, and another object of my invention is to ei'lect improvements in the construction ot the rear axle so that the same forms alsok the rear crossbar of the main frame and is provided with means whereby the portion on which the rear kwheels are mounted may be adjusted as may be required to preserve alinement and to cause the rear wheels to track with the iront wheels or run exactly parallel therewith, and to also greatly strengthen the construction of the rear axle and enable any part thereot which may possibly get out of repair to be removed and replaced by a new part.

With the above and other objects in view, thepinveution consists in the construction, of devices hereinafter described and claimed.

ln the accompanying drawings Figure 1 is a plan of a road working machine constructed in'accordance with our invention and showing the scraper bars with their front ends spread apart as when. the machine is in operation.

Fig. 2 is a side elevation ot the same.

Fig. 3 is a diagrammatic plan showing` the scraper bars in spread., operative position in full lines and in collapsed or retracted position in dotted lines.,

Fig. l is a diagrammatic `elevation also showing the scraper bars in such positions.

Fig. 5 is a d'agramrnatic transverse sectional view on the planeindicated by the line 5-5 of 3, and showing thescraper bars `in spread position in'ltull lines and in retracted or collapsed( position'invr dotted lines. f v

Fig. 6 is a. detail elevation ot one oi the tackle operating means and its spring brake for preventing casual movement thereof.

Fig. 7 is a detail elevation partly in section, of the rear end oi' the main trame and showing the construction ot the rear axle and its adjusting and strengthening means.

Fig. 8 1s a detail plan oit the same, partlyv in horizontal section.

Fig., 9 isa detail rear same.

The main trame 1 of our improved road working machine is provided with rearwardly diverging side bars 2'; et channel iron and, are connected together at their elevation oi' the front ends by a cross bar 3 the ends of which are here shown as projecting outwardly therefrom. Intermediate cross bars 4, 5 and 6 are also here shown. The rear cross bar or beam 7 of the main frame is an I-beam the ends of which are riveted or bolted to the side bars 2 and arranged inV the opposing channeled sides thereof and said bar 7 also forms the arch bar of the rear axle. Axle arms or blocks 8, which in practice are short sections of I-beams are arranged with their inner portions under the beam or arch bar 7 and withrtheir upper flanges bolted or riveted to the base lianges of the bars Q'and 7 as shown at 9, the outer portions of said arms or blocks projecting outwardly beyond the sides of the main frame as shown. The rear axle members 10, the outerportions of which form the spindles on which the rear wheels 11 are mounted, are arranged under the blocks or arms 8 and have their inner ends bolted thereto as at l2; Saddle blocks 13 are secured by bolts 14 to the under side of the outer portions of the larms 8, the said bolts passing through the base flanges of said arms. Each of the said saddle blocks has an opening 15 through which the axle member 10 passes.

Braces 16 are arranged under the rear portions of the bars 2 and have their front ends bolted thereto as at 17, the rear ends of said braces extending between the lower sides oli the arms 8 and the upper sides oi the axle members 10 and being bolted or riveted to the base llanges of said arms 8 as at 18. Bracket blocks 19 are riveted or bolted to the outer sides of the bars 2V and are provided with openings through which extend the front portions of rearwardly diverging brace and adjusting rods 20 the rear portions of which extend through openings in the saddle blocks 13. At their front ends the said rods are provided with nuts or heads 21. Adjusting nuts 22 are threaded on the rear portions of said rods and are arranged on the front and rear sides of the saddle blocks, wedge-shaped spacer blocks or washers 23 being arranged between said nuts and they front and rear sides of the saddle blocks as shown in Figs. 7 and 8. This construction of the rear axle makes the same exceedingly strong, also enables the saine to be readily and cheaply repaired in case of injury from any cause to any part thereof, and also `enables the members 10 to be adjusted, by merely appropriately turning the nuts 22 by means of a wrench, to'keep said members lO in alinement and to cause the rear wheels to properly track, under all conditions, and run exactly parallel with the front wheels.

The front truck24- is lhere shown as comprising an arched axle 2,5, front wheels 26,. .a .'.drawbar Waferattellment *50a trader and braces 28 lfor said axle and draw bar.

A suitable platform 29 is provided on the front portion of the frame 1, with a top 30, and a tool box 31 is also in practice provir ed. llle would have it understood Vthat while we here show and describe a pre- Our preferred construction of the ymainV frame makes the same suiliciently strong to withstand the stresses occasioned bv worl ing conditions and the great weight ofthe scraper bars 32 and the weight and leverage or" the drag` 83.

A standard 34 rises from the center of' the cross beam 7. A. pair of rearwardly converging` bars 85 have their front ends bolted on the arms 8 of the rear axle and their rear ends spaced apart and provided with upwardly and forwardly inclined standards 36, said bars being inclined rearwardly and upwardly. Brace bars 37, which are similarly inclined have their Yfront ends bolted on the rear end of the frame and their rear ends bolted to the'upper ends of said standards 86. Braces 38, which cooperate with the standard 34 to form trusses, have their front ends bolted on the cross bar 6 of the main frame, their intermediate portions secured to the upper end of Vthe standard 34 andtheir rear ends secured to the lowerends o1 the standards 36 and rear ends or the arms 35. Rearwardly and upwardly inclined standards V39 are secured to the arms 35, standards 36 and braces 37, and pulley 40 is mounted between the upper ends ot said standards 39. The drag` 33 may be of any suitable construction and is here shown asprovided with longitudinally adjustable drag ,bars 41 the front ends onf which are pivotally connected as at 42 to the rear portion oit the main frame on opposite sides thereof. A. pullejT 43 is connected to the drag and a suitable chain 44 or the like hasone Yend secured to the standards 39,' said chain passing around said pulley 48, and over the pulley 40 and its front end being secured to a drum which .is mounted on the platform and is provided at one end with a hand wheel 46. Said drum is horizontally arranged `and in practice a spring` brake 46a provided for the hand wheel, to prevent casual turning or" the drum.

The scraper bars are of the usual construction in machines of this class and their rear ends are pivotally connected, in appropriate spaced relation, to a link bar 47. A draft chain 48 has its rear endA connected by a bridle chain V49 to the linlr bar 47 and its front end lconnected to a vertically arranged drum 50 which is mounted under the platform as at 51. 'Said drum is provided with a ratchet wheel 52 and trip dog 53 which the operator by his foot can readily disengage from the ratchet wheel, to quickly release the drum, and a shaft 54 extends upwardly from said drum and is provided with a hand wheel 55. n

Spreader bars 56 have their front ends loosely pivotally connected as at 57 to the ends of the front cross bar 3 of the main frame and have their rear ends loosely pivotally connected as at 58 to the scraper bars at points a suitable distance from the front ends of the scraper bars. To enable the rear ends of the scraper bars to be raised and lowered, we provide a drum shaft 59 which is mounted on the main frame as shown and is connected by a hoisting chain 60 and a pul ley 6l to the link bar 47, the rear end of said hoisting chain being secured to the rear ends of the arms 35 as at 62 and the front end of ysaid chain being secured to said drum shaft for winding thereon and unwinding therefrom as at 63. The front end of said drum shaft has a beveled gear 64 which engages a similar gear 65 on a shaft 66. Said shaft is mounted in suitable bearings, is horizontally arranged, and is provided at one end with a hand Wheel 67. A spring brake 68 engages said hand wheel to revent casual turning of said shafts. aid spring brake is shown in detail in Fig. 6, and has afree end 69 to enable the operator, by stepping thereon, to causev said spring brake to release said hand wheel when this is desired. The said spring brake is of the same construction as the spring b-rake 46a hereinbefore mentioned and is similar to the spring brakes hereinafter mentioned in connection with the hand wheels of the hoisting means for the front ends of the scraper bars.

rlhe said hoisting means comprises cranes 70, tackles 7l, and drums 72. Each crane is here shown as comprising an upper member 73 o-r arm and a lower member 7 4, which are mounted for swinging movement in an inclined plane so that the outer end of each crane rises as it swings rearwardly. ln effeet the pivotal axis of each crane is rearwardly downwardly inclined as is indicated by the dotted line 75 cb-a in Fig. 2, and as is also clearly indicated in Figs. l, 3 and 4, and any suitable means may within the scope of our invention be employed for so mount ing the cranes. As here shown, the inner end of each crane member `7 3 is mounted on one of the drums 72 and the inner end of the lower crane member is provided with a pivot pin 76 which may be placed in any of a series of openings 77 of a bracket 78 on one side of the main frame. Said openings 77 are eccentric to the drums 72 which form the pivots for the upper members of the cranes, and by shifting the pivot pins 76 the inclination of the pivot axes 5 af-a of the cranes may be varied as may be desired, to' canse the front ends of the scraper bars to be lifted as high as may be desired from the road surface.

Fach tackle 7l comprises a chain 7 9, a pulley SO connected to one of the scraper bars and its spreader bar, and a pulley 3l carried by one of the cranes, one end of each of said chains being secured to the crane, its opposite end being secured to one of the drums 72 and each of said chains engaging the pulleys 80, Sl, as shown. lbach drum 7 2 has a beveled gear 82 at its upper end which is engaged by a beveled pinion 83 on a horizontal shaft 34. rEhe said shafts are mounted in suitable bearings 85, above the plat-- form and are provided at their inner ends with hand wheels 36, said hand wheels having spring brakes 37 which are identical in construction with the spring brakes 63 shown in Fig. 6. By means of the tackles, drums and cranes, the front ends of the scraper bars may be manually raised and lowered and adjusted as may be required by the condition of the road and by the work, and the said tackles, cranes and drums prevent the front ends of the scraper bars from dropping, after the scraper bars have been thus adjusted or set.

rlhe scraper bars, which are drawn Aforwardly with the machine, by the draft chain 48 and its connections may be spread to any desired extent at their front ends, to operate on a road surface of any width and after the scraper bars have been manually ad justed at their front ends, as before described, it is not necessary to change sach adjustment or for the operator to exert himself manually, nor is it necessary to employ any kind of motor or other power in order to retract or collapse the scraper bars while the machine is moving forwardly, nor is it necessary to stop the machine nor to back it in order to accomplish such purpose. l/Vhile the machine is moving forward and rhen for any reason it becomes necessary or de sirable to collapse or retract the scraper L 5 all that it is necessary to do is for the operator, with one foot, to disengage the dog 53' from the ratchet wheel 52 and thereb'x'-,Y release the drum 50. rihis slackens the draft chain, the draft stress on the machine continues, and the load or work engaged by the scraper bars, that is to say, the dirt or soil or road material between the scraper bars tends by its resistance to bring the scraper bars to a standstill. rJhe cranes however, are free and owing to the' fact that their pivotal axes 75 and are inclined, said cranes as they swing rearwardly under the stress exerted thereon by the hoisting tackles 7].

move upwardly as is indicated in Fig. 5 and in the diagrams Figs. 3 and 4 and raise the front ends of the scraper bars while the rear ends of the scraper bars remain in contact with the ground and the spreader bars 56 draw the front ends of the scraper bars toward each other and thus collapsethem. This movement 0f the cranes is automatic, is wholly incident to the forward movement of the machine and the slacht-ming of the draft chain a8, and does not require any operation whatever of the hoisting tackles. By thus automatically raising the front ends of the scraper bars, their front portions are disengaged from the load of earth. and'they are free to rapidly and instantaneously swing inwardly and collapse, (s will be understood.

Having thus described our invention, what we claim is l. ln a road working machine, in combination with a main frame and carrying means therefor, a scraper bar, spreader bar pivotally connected to the main frane and the front portion ofthe scraper bar, hoisting means for the rear end of the scraper bar, a drat element connected tothe rear portion of the scraper bar, means to releasably connect the draft element to the main frame, a crane mounted on the main frame for swinging movement and having inclined pivot axis so that the free end of said crane moves upwardly as the crane swings rearwardly, and connecting means between the crane and the front portion of the scraper bar, said crane being swung` rearwardly by the forward movement of the machine and hence caused to automatically raise the front end of the scraper bar, when the rear end of the latter is released by the draft element and thus permitted to remain on the ground.

2. In a road working machine, in combination with a main frame and carryl g means therefor, a scraper'bar, connecting means between the frame and the front portion of the scraper bar, a hoisting element connected to the front portion of the scraper bar, and mounted for rearward and upward movement on the fra-me, by the forward movement of the machine, hoisting means for the rear end of the scraper bar, a draft element connected to the rear portion of the scraper bar, and means to releasably connect said draft element to the frame.

3. In a road working machine, in combination with a. main frame and carrying means therefor, a scraper bar, connecting means between the frame and the front portion of the scraper bar, ay hoistingelement mounted for rearward and upwardl movement on the frame by the forward movement of the machine, a hoisting tackle carried by said element and connected to the front portion of the scraper bar, means to operate and adjust saidtackle, a" draft element connected to the rear portion ofthe scraper bar, and means to `releasably connect said draft element to the frame.

d. ln a road working machine, in combination with a main frame and carrying means'therefor, a scraper bar, a releasable draft connection between the frame and the rear portion of the scraper bar, a spreader connection between the frame and the front portion of the scraper bar, andV hoisting means mounted for rearward and upward movement on the frame and connected to the front portion of the scraper bar,'to automatically raise the frontend of the scraper bar by the forward movement of themachine when the draft yelement is released.

5. ln a road working machine, in combination with a main frame and carrying means therefor, a pair of scraper bars having their rear ends pivotally connected together in spaced relation, spreader bars connecting thev frame to the front portions of the scraper bars, hoisting means for the rear ends of the scraper bars, a draft element releasably connecting` the frame andthe rear ends of the scraper bars, cranes mounted on the main frame for swinging movement and having inclined pivot axes so that the free ends of said cranes move upwardly as the cranes swing rearwardly, hoisting and adjusting tackles for the front ends of the scraper bars and carried by the cranes, and operating and holding means for said tackles.

6. ln a :cad working machine, a main frame including a pair of side bars, a connecting beam between the rear ends of said bars, axle arms secured under the ends of said beam, wheel carrying axle membersunder and secured at their inner enr s to said arms, saddle blocks also securedunder said arms and through which said axle members extend, brace rods secured at Vtheir front ends to the sides of the frame and Vhoming their rear portions extended through openings in the saddle blocks, and adjusting nut-s threaded on the brace r ds Yand bearing against the front and rear sides of the saddle blocks.

fn testimony whereof we afiix our signatures. i

NATHANEL S. MONROE. ANDl-Ell J. IEONROE. llfitnesses SYLVIA SEARS, GEORG-n lV. Mormon.

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