US1969204A

US1969204A - Road machine

Info

Publication number: US1969204A
Application number: US589912A
Authority: US
Inventors: James E Carlson
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-01-30
Filing date: 1932-01-30
Publication date: 1934-08-07
Anticipated expiration: 1951-08-07

Description

Aug. 7, 1934. J. E. CARLSON ROAD MACHINE Filed Jan. 30, 1932 6 Sheets-Sheet l INVENTOR JIQMES E ARLS 0N ATI'ORNE$ Aug. i 1934. J. E. CARLSON ROAD MACH I NE Filed Jan. 30, 1932 6 Sheets-Sheet 2 k) H l INV ENTOR JAMES 5. BY

RLso/v Q 44 4 ATTORNEY Aug. 7, 1934. CARLSQN 1,969,204

ROAD MACHINE Filed Jan. 30, 1932 6 Sheets-Sheet 3 I .4. ,INVENTOR;

W J4ME$ 5. C RLSON ATTORNEY Aug. 7, 1934- J. E. CARLSON 1,959,204

ROAD MACHINE Filed Jan. 30, 1932 6 Sheets-Sheet 4 4:5 .55 BY M ATTORNEY 1934- J. E. CARLSON 1,969,204

ROAD MACHINE Filed Jan. 30, 1932 6 Sheets-Sheet 5 INVENTOR F 7 JA MES E. RLS 0N ATTORN EY 7, 1934. J. E. CARLSON 1,969,204

ROAD MACHINE Filed Jan. 30, 1932 6 Shee'ts-Sheet 6 as ,5/ as film-1: ELK-ll:

INVENT R Jhmss CR so/v BY ATTORNEY Patented Aug. 7, 1934 UNITED STATES PATENT OFFICE ROAD MACHINE James E. Carlson, Minneapolis, Minn. Application January 90, 1932, Serial No. 599,912

42 Claims. (01. 37-153 This invention relates to road working machinery, and the primary object is to provide means of a novel, eflicient and practical nature for maintaining and repairing dirt, clay, and gravel roads, by effectively removing transverse as well as longitudinal grooves and corrugations therein, and also for use in mixing oils or other applied preparations into the surface material of the road without shifting the latter transversely across the road as would for instance be the case when employing a conventional grader blade. More particularlythe object is to provide an attachment for already built and existing types of road machines now in use, so as to greatly improve the same, and to this end I provide a road working unit adapted to be carried by the mechanism which normally carries and regulates other instrumentalities such as a conventional grader blade, and scarifier, and this unit embodiescertain construction features some of which are similar to those disclosed in my copending patent application-Serial No. 525,383, filed March 26th, 1931, for Road grader, and Serial No. 589,911, filed January 30th, 1932, for Road working machine. More detailed and specific objects will be disclosed in the course of the following specification, reference being had to the accompanying drawings, wherein:

Fig. 1 is a side elevation of a well known commercial type of power grader which has been equipped with a working unit embodying my invention.

Fig. 2 is a plan view of the machine as shown in Fig. 1, but showing the planer and trowelling unit in an operative angular position, rather than in the directly transverse position shown in Fig. 1.

Fig. 3 is an enlarged detail plan view of the left end portion of my attachment unit.

Fig. 4 is a front elevation of the structure shown in Fig. 3.

Fig. 5 is an end elevation of the unit as seen on the line 5-5 in Fig. 3.

Fig. 6 is a sectional elevation on the line 6-6 in Fig. 3; the arrangement in this view, as in Fig. 1, differing from the disclosures in Figs. 4 and 5, in that the latter figures show the planer blades raised from the operative elevation still assumed by the troweller beam, while in Figs. 1

and 6 the planer blades are shown as in active cutting engagement with the roadsurface.

Fig. 7 is a side elevation of the forward portion of a power grading machine, as shown in Fig. l, but showing a modified form of planer unit, and showing said unit as interchanged with the usual scarifler mechanism which has been removed. In this case also the trowelling beam is omitted.

Fig. 8 is a plan view of the structure as shown in Fig. '7, and with a, portion of the main frame and controls broken away for purpose of illustration.

Fig. 9 is a detail sectional elevation 0n the line 99 in Fig. 8.

Fig. 10 is a side elevation similar to Fig. '7, but partly in section as on the line 10--10 in Fig. 11, showing a still further modified form of the invention. 1

Fig. 11 is a plan view of the machine shown in Fig. 10.

Fig. 12 is a detail section on the line 12-12 in Fig. 13.

Fig. 13 is an enlarged detail elevation of the stabilizer shoe, as on the line 1313 in Fig. 11.

Fig. 14 is an enlarged detail view of one of 7 the telescopic lift devices for the secondary or implement frame, the same having fractional portions broken away for purpose of illustration.

Fig. 15 is a detail view showing a modified bracket for mounting the stabilizer shoe when the planer beam is operated in an angular position.

Referring to the drawings more particularly and by reference characters, A designates a main frame of a power grader having front wheels 16, rear traction wheels 17, and a power plant 18. A secondary or implement frame B is disposed under the main frame in'advance of the power unit 18, and has its front end pivotally secured as at 19 while its rear portion is carried, for angular and vertical adjustment, by a pair of laterally disposed depending links 20, the lower ends of which are pivotally attached to the frame B, as at 21, while their upper ends are" pivotally connected, as at 22, to crank arms 23. The cranks 23 are carried by the outerends of a transversely disposed shaft 24, on the frame A, and are respectively and individually oscillated by hand wheels 25, at the rear of the machine, operating screw shafts 26 engaging sleeve extensions 27. Spring devices such as 28 are preferably employed to partially counterbalance the weight of the frame B, and tools carried thereby, thus minimizing the effort required to vertically and angularly adjust the tool frame.

In order that the road engaging blade, such as 29 in Figs. '7 and 8, or other tool may be angularly adjusted with respect to the longitudinal axis of the machine, such tool or blade is secured to the frame B by an oscillatable connection, which, as shown comprises a circle" made up of an upper section 30 secured to the frame B and a lower section 31 which carries the tool and is slidably interlocked with the upper section 30, as shown for instance in Fig. 4. The two circle sections may be relatively adjusted in any suitable manner, and the shaft 32 and hand wheel 33 may be employed to effect such adjustment from the rear of the machine, in which event the forward end of the shaft may actuate the circle section 31 through suitable means (not shown) such as a worm or bevel pinion.

As more or less conventional equipment for machines of this character it is customary to provide the front end thereof with a scarifier frame C, which is pivotally mounted, as at 34, and has its rear end provided with suitable scarifying teeth 35. The rear end of the frame C is vertically adjusted by links 36 which depend from cranks 3'7, rigid on a transverse shaft 38, and this shaft is in turn oscillated, through suitable connections, by a shaft 39 having a hand wheel 40 near the operator's station.

All the mechanisms thus far described are of conventional design and construction, and I claim nothing new therein except as such mechanisms or parts thereof may contribute to the novelty and efliciency of the function and operation of the devices and arrangement of elements which I combine therewith, and which will now be described in detail.

Reference is first made to the form of the invention illustrated in Figs. 1 to 6, inclusive, in which event the scarifier mechanism C and 34-40 is not brought into use, and the planer and trowelling devices are both carried by and under the circle 30-31 so as to be vertically and angularly adjustable together with the tool frame B under the controlling action of the hand wheels 25, and will also be subject to angular control with respect to the path of travel under the influence of hand wheel 33.

A plurality of road engaging planer blades 41 are secured by bolts 42 to brackets 43 which are in turn secured by bolts 44 to the underside of a channel beam 45. This beam is rigidly secured to the circle section 31 by depending bracket arms 46 and angular braces 47. Thus it will be seen that the planer blades 41 are rigidly mounted with respect to the main frame A, yet are adjustable, as a series and together with the beam 45, vertically and also from the transverse position shown in Fig. 1 to the horizontally oblique position as shown in Fig.2. It may here be noted that when the cutting blades are set at as great an angle with respect to the beam 45 as shown in Figs. 2 and 3, it is obviously necessary to adjust the beam 45 to a relatively more acute angle with respect to the line of travel, than would otherwise be the case, particularly when the blades are used for substantial cutting, as distinguished from the oil mixing function, as it is desirable to have the successive cutting edges of the blades effect, as nearly as possible, a continuous composite cutting plane. It is also desirable, if not an absolute necessity, that the cutting edges of the blades 41 be maintained in a horizontal plane when actually engaged in the cutting operation, and in order that adjustments may be made to compensate for different cutting depths and to allow for other variable conditions as found in different graders, I provide the upper end of the braces 47 with series of holes 48 for selective engagement with the securing bolts 49, and when such adjustments are found necessary it will be noted that the entire beam will be free to swing up and down slightly from the securing pivot bolts 50 at the lower end of the brackets 46 (Figs. 5-6).

An important feature of the present invention resides in the specific form and arrangement of the planer blades 41. These blades, as withlthe planer blades 22 in my above noted application for patent Serial No. 525,383, are parallel, and disposed at an oblique angle with respect to the direction of travel, so as to have acute cutting actions in the road surface, which is obviously much more effective than the blunt hoeing action of a conventional scraper blade which is normally operated at a comparatively wide angle with respect to the direction of travel. This arrangement also permits the taking of a relatively deeper cut in the road surface, with a result that the corrugations can be more completely removed than with a straight single blade which in most instances merely scrapes oif the tops of the ridges and fills in the hollows, a not desirable condition. When in actual use for planing purposes the lower cutting edges of the blades 41, operate in as nearly a horizontal plane as possible so that the entire cutting edge of each blade will have a uniform cutting. depth and action, and it is also preferable to maintain the beam. 45 at a suflicient angle with respect tothe longitudinal axis of the machine so that the blade paths will overlap, thus preventing the possibility of uncut strips being left between the blades. When the machine is only being used for mixing oil or other substances into a loose gravel or top soil this condition is not of as great importance and if a wider strip of road is to be covered the beam 45 can be set at a more nearly crosswise position of the machine.

An important and novel distinction in the blades 41 over those of my earlier application Serial No. 525,383, lies in the fact that instead of being mounted vertical and having an undercurved cutting edge, I now use straight plates and mount them on the brackets 43 in a decided incline or angle with respect to the perpendicular (see Fig. 4), and then bevel the cutting edges, as at 51, so that as the blades are forced through the road material they will not only have a slicing action by virtue of their oblique position with respect to the line of draft, but will have decided forwardly directed cutting edges that will have a planing or slicing action as distinguished from the scraping effect of a substantially vertical blade or blades having no forwardly directed cutting edge. This angular position of the blades 41, with respect to the perpendicular, also results in distinct advantages over blades such as shown in my application Serial No. 525,383, in that they do not require a bending or forming operation, and can be worn off practically up to the brackets 43 before requiring replacement, thus utilizing a maximum amount of blade material. It is also found, particularly where the working faces of the blades 41 are hardened, that the blade will have a self-sharpening action when in use, thus maintaining the bevel 51 and the forwardly directed cutting edge adjacent thereto.

The trowelling unit, shown in Figs. 1-6, comprises an elongated angle iron beam 52 to the underside of the horizontal flange of which is detachably secured, as by stud bolts 53, a wear plate 54 having rounded or beveled front and rear edges 55. The vertical flange of the beam 52 is preferably provided with a forwardly curved shield 56 to prevent any possibility of dirt or gravel passing rearwardly over the beam.

The beam 52 is carried by a pair of L-shaped yokes 57, the front ends of which are pivoted, as at 58, to anchor plates 59 secured to the channel beam 45 as by bolts 60. The depending rear leg portions of the yokes 57 are pivotally secured, at 61, to lugs 62 rigid with the beam 52, and have set screws 63, above and below the pivot centers 61, for rendering the beam unit 52 rigid with respect to the yokes 53 and also for providing angular adjustments to the beam to compensate for irregularities in wear or other variable circumstances. It will also be seen that by tilting the beam forwardly or rearwardly it is possible to predetermine, to some degree, the volume of earth pushed ahead of and transversely distributed by the beam and the flowage of material under the trowelling shoe 54.

The trowelling unit is yieldingly held down in operative contact with the road surface under the depressing action of a pair of springs 64'which are compressed between the yokes 57 and heads 65 of bolts 66, the lower ends of which are adjustably anchored as at 67 to arm extensions of the plates 59. This arrangement permits the troweller to be used alone, as shown in Figs. 4 and 5, when so desired, by partially lifting the frame B, and gives added pressure to the plate 54 when most needed, i. e., when both units are being employed, as in Figs. 1 and 6. The yokes 57 are preferably provided with re-enforcing braces 68, and to offset or counteract the end thrust action of the trowelling beam with respect to the planer unit I also provide angular brace rods 69 between the two units, these rods having pivot connections '70 with the beam 45 in axial alignment with the pivot centers 58 so as not to interfere with the previously noted vertical adjustments as between the two working units.

The operation and use of the machine as thus far described may be set forth as follows:

Under ordinary road maintenance conditions where it is desirable to operate the machine for the sole purpose of evening out irregularities such as transverse corrugations, as well as longitudinal extending grooves and ruts, the planer blades are lowered by manipulating the hand wheels 25 until their cutting edges are operating at a depth which is sufficient to remove all ridges and projections which may exist. It is important that the blades 41 should not be operated at a depth lower than the bottoms of the corrugations except in special cases where it is desired to bring up dirt or clay to mix with the gravel or surfacing material for a binder therewith. The planer blade supporting beam 45, as well as the trowelling beam 52, may be operated at any angle from the transverse position, as indicated in Fig. 11, to the oblique position shown in Fig. 2, depending upon the type of work being done and the variable conditions that may be met with in different roads. In any event the road or surface material cut from the road by the blades 41 will not be shifted transversely as with an ordinary conventional grader blade, but will be deposited or left in strips immediately behind the respective blades 41, in which condition they are next acted upon by the trowelling beam 52 and the smoothing shoe 54 secured thereunder.

As the trowelling beam comes into active contact with the dirt or gravel loosened up by the planer blades, such material has a tendency to accumulate in front of the trowelling beam, but

gradually finds its way under the shoe 54 because of the beveled edge 55 and the flexibility provided through the medium of the springs 64 which have a tendency to exert a uniform and consistent downward pressure upon the trowelling beam at all times. little tendency for the trowelling-beam to shift the loose road material to one side or the other, as with an ordinary grader blade, it will serve to eliminate or remove all loose rocks or small boulders and stones from the road because such objects will not pass under the shoe 54 but will be delivered laterally of the machine by the beam 52. Rocks or other objects which are small enough to get under the beveled edge 55 of the shoe 54 will ordinarily be pressed down into the road surface as the shoe passes thereover, with a result that the road is left in a smooth and even condition.

It will thus be seen'that the planer blades 41 will, because of their design and arrangement in the machine, effect a very uniform and regular slicing or shaving action on the road surface and in doing so do not tear, rip up, or agitate the road as is done with ordinary scariflers, and will not shift the cut material to either side of the machine as with a conventional grader blade.

With reference to the trowelling beam, it is also distinguishable from conventional grader structures in that it does not have a decided lateral shifting action although its vertical front face will of course have a material distributing action, and does not in fact cut into the road surface at all as does the conventional grader blade because of the bevel or slant 55 at the forward edge of the shoe 54, and also is primarily intended for exerting pressure downwardly upon the road under the action of the springs 64, which a grader blade will do under no circumstances, and under this depressing action will cause a smoothing over of the road material which cannot be done in any other way.

This smoothing action of the shoe 54 is of such importance that it may frequently be found desirable to run the machine using this implement only, in which event the parts are adjusted to the positions shown in Figs. 4 and 5, wherein it will be seen that the blades 41 have been raised entirely out of engagement with the road and that the beam 52, due to the change in angle of the frame 5'7, has been adjusted on the centers 61 by the set screws 63 so as to have proper operative contact with the road surface.

When using the machine for the purpose of mixing oil or other treating substances with the road material, the blades 41 can be operated at any desired depth, depending upon the degree of penetration desired for the oil or other substance. In any event the action of the blades 41 in mixing the materials will no doubt be readily understood as the respective blades will operate in much the same manner as an ordinary plow, in that they will cut up a strip or ribbon of the road which has been treated and by turning it over will effect the desired mixing action, and as the trowelling beam 52 then continues to operate it will firmly press the mixed material down into place.

In the machine illustrated in Figs. '7, 8, and 9,

the conventional grader mechanism proper is in i noway disturbed, and the usual scraper blade 29 is manipulated or adjusted in the usual way. .It is not, however, used for the purposes of reducing hard ridges or corrugations, but is preferably disposed in a transverse position and is It may be noted that while there is merely employ for leveling off the loose material that has n cut off by the planer unit designated generfil by the letter D.

The unit D comprises a channel iron beam '71 which carries the planer blades '72 and is mounted, as by securing bracket 73, and bolts '74, to the scarifier frame C, and is substituted for the usual scarifler teeth 35. Thus it will be seen that the planer unit D may be readily and conveniently operated by the devices 36-40 and may be used optionally with or independently of the blade 29 and without in any way interfering with the mechanisms of or controls for the frame 3, nor function of the blade 29. In this instance, as will be noted in Figs. 8 and 9,

the blades '72 are designed in much the same manner as the previously described blades 41, but instead of all being parallel, as in Figs. 2 and 11, they are arranged in two groups with the blades in one group disposed at reversely oblique directions with respect to the blades of the other group, which arrangement equalizes the end thrust imparted to the beams '72 by-the two groups of blades when in working or cutting engagement with the road, as in my previously filed application Serial No. 525,383.

In the modification of the invention, as shown in Figs. 10 to 15, inclusive, the scarifier mechanism is left in its raised or idle position, and the planer and trowelling devices are both carried by frame B, but in somewhat different manner than as shown in Figs. l-6. Thus the trowelling b'eam '76 is rigidly secured, as by brackets '77, to the conventional blade structure 78, without necessarily removing the blade 29, and the required flexibility of contact is had with the road surface through the action of springs '79 in telescopic lift units made up of inner and outer tubes and 81, one each of which units is substituted for the previously described links 20. The relative movements of the tubes 80-81 of each unit is limited by a pin 82 operating in a slot 83 (Fig. 14). It will thus be seen that while the cranks 23 are operative to lift the entire mechanism from the ground, when the units 78-83 are fully extended, they may also function to regulate the downward pressure on the road tools through the yielding action of the springs '79.

The planer unit, as shown in Figs. 10-15, is made up of a beam 84 having blades 85, similar to the corresponding elements in Figs. l-6, but instead of being rigid with the'circle section 31 the beam 84 is flexibly connected thereto by forwardly extending push arms 86 and brace rods 8'7 which are pivotally anchored, as. at 88, to bracket extensions 89 of a supplemental frame 90 secured to the circle section 31.

The frame 90 has a cross bar 91, at its forward end, disposed directly over the beam 84 and connected therewith by a series of expansion springs 92 and tie bolts 93. The bolts 93 which are adjustable as to length and slidable in one or the other of the beams (84 or 91) serve to limit the spread between the beams, while the springs 92 act to hold the planer blades 85 incutting engagement with the road.

With the foregoing described construction it is obviously impossible, or at least impractical, to regulate the cutting depth of the blades 85 through the devices controlled by the hand wheels 25, and consequently other means are provided, and, in the present instance consists of a pair of shoe castings 94, one at each end of the beam 84 and having direct sliding contact with the road surface independently of the troweller unit and also of the ground wheels 18-17. The shoes 94 have front and-rear road engaging surfaces, and are pivotally connected, at points intermediate said surfaces, by pins 95, to frames or arms 96, which arms may be designed as shown either in Figs. 11 and 15, depending upon the operative angle of the beam 84. The arms 96 are pivotally connected at their inner ends to the beam 84, as at 9'7, and areadjustably secured to the beam by bolts 98 having nuts 99, the latter of which may be employed to regulate the working depth of the blades 85 with respect to the road surfaces traversed by the shoes 94.

It will thus be seen that with the mechanisms shown in Figs. 10-15, the two road working. units can be raised and lowered through the action of the hand wheels 25, but, that while in action, the primary function of the crank arm 23) movements is to increase or decrease the pressure upon one or both ends of the trowelling unit, as occasion may require. It may also be noted that the structure of Figs. 10-15 differs from those previously described in that it provides freedom for upward yielding action of both working units when obstructions are met with requiring such movements.

It is understood that suitable modifications may be made to the structure as disclosed, provided such modifications come within the spirit and scope of the appended claims. Having now therefore fully illustrated and described my invention, what I claim to be new and desire to protect by Letters Patent is:

1. In a road machine, a suitable frame, a tiltable trowelling unit attached to the frame and disposed in a generally crosswise position with respect to the direction of travel, said unit having an upright forward face, for accumulating loose material in front of the unit, and a bottom surface for trowelling engagement with the road, said bottom surface of the unit being upwardly beveled at its forward edge so as to effect and facilitate feeding action of said loose material in a direction under the unit as the machine moves forwardly, and threaded means for gradually tilting the trowelling unit to obtain a proper working relationship with the road.

2. In a road machine, a suitable frame, a trowelling unit tiltable on an axis extending longitudinally thereof and attached to the frame and disposed in a generally crosswise position with respect to the direction of travel, said unit having an upright forward face, for accumulating loose material in front of the unit, and a bottom surface for trowelling engagement with the road, and means including adjuster screws disposed above and below said tilting axis for tiltably adjusting the trowelling unit on its axis.

3. A road machine comprising a main frame having suitable ground supports, a transversely disposed vertically adjustable beam adjustably carried underv the frame, means for yieldably pressing the beam downwardly, a plurality of angularly disposed blades carried by the beam, and 140 devices at the ends of said beam for engaging the road surface to limit the cutting depth of said blades independently of the said main frame ground supports.

4. The combination with a road machine hav- 145 ing a vertically and angularly adjustable tool frame and a circle member carried by said frame for adjustment about a vertical axis, of a tool beam disposed transversely of the machine under the circle and rigidly secured thereto for adjustment therewith, a series of planer blades secured under and to the beam, and a trowelling beam disposed rearwardly with respect to the blades and also carried by the circle so as to be adjustable therewith and in unison with the tool beam.

5. The combination with a road machine having a vertically and angularly adjustable tool frame and a circle member carried by said frame for adjustment about a vertical axis, of a tool beam disposed transversely of the machine under the circle and rigidly secured thereto for adjustment therewith, a series of planer blades secured under and to the beam, and a trowelling beam disposed rearwardly with respect to the blades and also carried by the circle so as to be adjustable therewith and in unison with the tool beam, said trowelling beam being vertically movable with respect to the blades, and means for yieldingly depressing the beam with respect to the blades.

6. The combination with a road machine having a vertically and angularly adjustable tool frame and a circle member carried by said frame for adjustment about a vertical axis, of an attachment frame detachably secured to the circle member so as to be axially, vertically, and angularly adjustable therewith, a pair of road working units carried by the attachment frame in fore and aft positions and.- transversely with respect to the machine, and means for yieldably mounting the road working units with respect to eachother whereby one of them may yield vertically in response to variations in road surface resistance.

7. The combination with a road machine having a vertically and angularly adjustable tool frame and a circle member carried by said frame for adjustment about a vertical axis, of an attachment frame detachably secured to the circle member so as to be axially, vertically, and angularly adjustable therewith, a pair of road working units carried by the attachment frame in fore and aft positions and transversely with respect to the machine, and spring means for yieldably depressing one of the units with respect to the other.

8. The combination with a road machine having a vertically and angularly adjustable tool frame and a circle member carriedby said frame for adjustment about a vertical axis, of an attachment frame detachably secured to the circle member so as to be axially, vertically, and angularly adjustable therewith, a pair of road working units carried by the attachment frame in fore and aft positions and transversely with respect to the machine, and means for vertically adjusting the road working units with respect to each other, the forward of said units having a series of angularly disposed blades for cutting strips of road surface, and the rear of said units having a beveled beam for trowelling over the cut road material.

9. The combination with a road machine having a vertically and angularly adjustable tool frame and a circle member carried by said frame for adjustment about a vertical axis, of an attachment frame detachably secured to the circle member so as to be axially, vertically, and angularly adjustable therewith, a pair of road working units carried by the attachment frame in fore and aft positions and transversely with respect to the machine, and spring means for yieldably depressing one of the units with respect to the other, a series of angularly disposed blades for cutting strips of road surface, and the rear of said units having a beveled beam for trowelling over the cut road material.

10. The combination with an axially, vertically, and angularly adjustable circle member of a road machine, of an attachment frame rigidly secured to the circle so as to be adjustable therewith, a tool beam secured to the attachment frame, a plurality of planer tools carried by the beam, and a trowelling beam carried by the attachment frame and disposed for operation on the road surface rearwardly of the planer tools.

11. The combination with an axially, vertically, and angularly adjustable circle member of a road machine, of an attachment frame rigidly secured to the circle so as to be adjustable therewith, a tool beam secured to the attachment frame, a plurality of planer tools carried by the beam, means for tiltably adjusting the beam with respect to the circle, and a trowelling beam carried by the attachment frame and having a beveled under surface for smoothening the road portion traversed by said planer tools.

12. The combination with an axially, vertically, and angularly adjustable circle member of a road machine, of an attachment frame rigidly secured to the circle so as to be adjustable therewith, a tool beam secured to the attachment frame, a plurality of planer tools carried by the beam, means for tiltably adjusting the beam with respect to the circle, a trowelling beam carried by the attachment frame with freedom for vertical movement with respect to the tool beam, and means for yieldably pressing the trowelling beam against the road surface.

13. The combination with a road machine having a main frame, a vertically and angularly adjustable secondary frame, and an axially adjustable circle member carried by the secondary frame, a tool beam carried by the circle, a plurality of planer blades carried by the beam, a trowelling beam carried by the circle, and means for yieldingly depressing one of the beams with respect to the other.

14. The combination with a road machine having a main frame, a vertically and angularly adjustable secondary frame, and an axially adjustable circle member carried by the secondary frame, a tool beam carried by the circle, a plurality of planer blades carried by the beam, a trowelling beam carried by the circle, and means for adjusting the secondary frame including a control mechanism having a yieldable portion permitting limited movement between the two frames.

15. The combination with a road machine having a main frame, a vertically and angularly adjustable secondary frame, and an axially adjustable circle member carried by the secondary frame, a tool beam carried by the circle, a plurality of planer blades carried by the beam, a trowelling beam carried by the circle, and means for adjusting the secondary frame including a control mechanism having a yieldable portion permitting limited movement between the two frames, one of said beams being mounted with freedom for limited vertical movement with respect to the other beam.

16. The combination with a road machine having a main frame, a vertically and angularly adjustable secondary frame, and an axially adjustable circle member carried by the secondary frame, a tool beam carried by the circle, a plurality of planer blades carried by the beam, a trowelling beam carried by the circle, and means for adjusting the secondary frame including a control mechanism having a yieldable portion permitting limited movement between the two frames,

IUD

one of said beams being mounted with freedom for limited vertical movement with respect to the other beam, and spring means tending to yieldably press said movable beam toward the road surface.

17. The combination with a road machine having a vertically and angularly adjustable tool frame and a circle member carried by said frame for adjustment about a vertical axis, of a .tool

beam disposed transversely of the machine under the circle and secured thereto for adjustment therewith, a series of parallel planer blades secured under and to the beam, and a distributing member disposed rearwardly with respect to the blades and also carried by the circle so as to be adjustable therewith and in unison with the tool beam.

18. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool support having a draft connection with said frame, a tool, comprising a sub-frame having a plurality of parallel cutting edges lying in a plane andadapted to plane material from the surface of the road and work it in a selected direction, and a leveling and distributing member adapted to receive planed material from said cutting edges to work said material in the opposite direction while creating a road "surface in a selected plane, means for positioning the tool to establish a desired road surface, comprising aligned pivotal connections between the tool support and said tool, means for adjusting said tool about the axis of said pivotal connections for positioning and maintaining said cutting edges in a plane parallel to the plane of the desired road surface, and second aligned pivotal connections between said leveling and distributing member and said sub-frame permitting relative movement therebetween.

19. The combination with a road machine having a vertically and angularly adjustable tool frame and a circle member carried by said frame for adjustment about a vertical axis, of a tool beam disposed transversely of the machine under the circle and rigidly secured thereto for adjustment therewith, a series of planer blades secured under and to the beam, and a transversely disposed distributing plate disposed rearwardly with respect to the blades and also carried by the circle so as to be adjustable therewith and in unison with the tool beam.

20. The combination with a road machine having a vertically and angularly adjustable tool frame and a circle member carried by said frame for adjustment about a vertical axis, of a tool beam disposed transversely of the machine under the circle and rigidly secured thereto for adjustment therewith, a series of planer blades secured under and to the beam, and a distributing plate disposed rearwardly with respect to the blades and also carried by the circle so as to be adjustable therewith and in unison with the tool beam, said distributing plate being vertically movable with respect to the blades, and means for yieldingly depressing the plate with respect to the blades.

21. The combination with a road machine having a vertically and angularly adjustable tool frame and a circle member carried by said frame for adjustment about a vertical axis, of an attachment frame detachably secured to the circle member so as to be axially, vertically, and angularly adjustable therewith, a pair of road working units.carried by the attachment frame in fore and aft positions and transversely with re.

spect to the machine, and means for vertically adjusting the road working units with respect to each other, the forward of said units having a series of angularly disposed blades for cutting strips of road surface, and the rear of said units having an upright face for effecting a transverse distribution of the cut road material.

22. The combination with a road machine having a vertically and angularly adjustable tool frame and a circle member carried by said frame for adjustment about a vertical axis, of an at tachment frame detachably secured to the circle member so as to be axially, vertically, and angularly adjustable therewith, a pair of road working units carried by the attachment frame in fore and aft positions and transversely with respect to the machine, and spring means for yieldably depressing one of the units with respect to the other, a series of angularly disposed blades for cutting strips of road surface, and the rear of said units having a front face surface for laterally distributing the cut road material.

23. 'I'he combination with an axially, vertically, and angularly adjustable circle member of a road machine, of an attachment frame rigidly secured to the circle so as to be adjustable therewith, a

tool beam secured to the attachment frame, a plurality of planer tools carried by the beam, and a transversely disposed distributing member carried by the attachment frame and disposed for operation on the road surface rearwardly of the planer tools.

24. The combination with an axially, vertically, and angularly adjustable circle member of a road machine, of an attachment frame rigidly secured to the circle so as to be adjustable therewith, a tool beam secured to the attachment frame, a plurality of planer tools carried by the beam, means for tiltably adjusting the beam with respect to the circle, a transversely disposed distributing member carried by the attachment frame and vertically movable with respect to the tool beam, and means for yieldably pressing the distributing member against the road surface.

25. The combination with a road machine having a main frame, a vertically and angularly adjustable secondary frame, and an axially adjustable circle member carried by the secondary frame, a tool beam carried by the circle, a plurality of planer blades carried by the'beam, a distributing beam carried by the circle, and means for yieldingly depressing one of the beams with respect to the other.

26. The combination with a road machine having a main frame, a vertically and angularly adjustable secondary frame, and an axially adjustable circle member carried by the secondary frame, a tool beam carried by the circle, a plurality of planer blades carried by the beam, a transversely disposed distributing plate carried by the circle, and means for adjusting the secondary frame including a control mechanism having a yieldable portion permitting limited movement between the two frames.

27. The combination with a road machine having a main frame, a vertically and angularly adjustable secondary frame, and an axially adjustable circle member carried by the secondary frame, a tool beam carried by the circle, a plurality of planer blades carried by the beam, a

distributing beam carried by the circle, and

-with freedom for limited vertical movement with respect to the other beam.

28. The combination with a road machine having a main frame, a vertically and angularly adjustable secondary frame, and an axially adjustable circle member carried by the secondary frame, a tool beam carried by the circle, a plurality of planer blades carried by the beam, a distributing beam carried by the circle, and means for adjusting the secondary frame including a control mechanism having a yieldable portion permitting limited movement between the two frames, one of said beams being mounted with freedom for limited vertical movement with 4 respect to the other beam, and spring means tending to yieldably press said movable beam toward the road surface.

29. In a road machine for planing and resurfacing a road during traverse thereof, a frame, a tool having a draft connection with saidframe comprising planing means including a plurality of cutting edges lying in a plane and distributing means having a fixed angular relation with respect to said planing means, means for adjusting said tool to establish a desired road surface, comprising means for positioning and maintaining said tool in position to make a cut of selected depth, means for leveling said tool to position said cutting edges in a plane parallel to the plane of the desired road surface, and means permitting adjustment of said distributing means vertically with respect ,to said planing means to create a road surface parallel to the plane of said cutting edges.

30. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool having a draft connection with said frame comprising a sub-frame having a plurality of parallel cutting edges secured thereto, means for positioning said tool to establish a desired road surface, comprising -means for adjusting said tool about a longitudinal axis to vary the angular relation between the plane of said cutting edges and a horizontal plane, means for varying the angle of said cutting edges with respect to the line of draft, and means for adjusting said tool about a transverse axis to vary the angular relation between the plane of said cutting edges and a horizontal plane.

31. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool having a draft connection with said frame comprising a sub-frame having a plurality of parallel cutting edges secured thereto, means for positioning said tool to establish a desired road surface, comprising means for varying the angle of said cut ting edges with respect to the line of draft, and means for adjusting said tool about a transverse axis to vary the angular relation between the plane of said cutting edges and a horizontal plane.

32. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool having a draft connection with said frame comprising a sub-frame having a plurality of parallel cutting edges secured thereto, and a leveling blade connected to said sub-frame, means for positioning said tool to establish a desired road surface, comprising means for adjusting said tool about a longitudinal axis to vary the angular relation between the plane of said cutting edges and a hori zontal plane, means for varying the angle of said cutting edges with respect to the line of draft, means for adjusting said tool about a transverse axis to vary the angular relation between the plane of said cutting edges and a horizontal plane, and means permitting adjustment of said leveling blade vertically with respect to said sub-frame to create a road surface in a plane parallel to the plane of said cutting edges.

33. In a road machine for planing and resurfacing a road during traverse thereof, a frame I having front and. rear supports, a tool having a draft connection with said frame comprising a sub-frame having a plurality of parallel cutting edges secured thereto and a leveling blade connected to said sub-frame, means for positioning said tool to establish a desired road surface, comprising means for varying the angle of said cutting edges with respect to the line of draft, means for adjusting said tool about a transverse axis to vary the angular relation between the plane of said cutting edges and a horizontal plane, and means permitting adjustment of the leveling blade vertically with respect to said sub-frame to create a road surface in a plane parallel to the plane of said cutting edges. v

34. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool having a draft connection with said frame, comprising a plurality of parallel cutting edges lying in a plane and adapted to plane material from the surface of the road and work it in a selected direction, and a leveling and distributing blade adapted to receive planed material from said cutting edges to work said material in the opposite direction while creating a road surface in a selected plane, means for positioning said too-l to establish a desired road surface, comprising means for adjusting said tool about a longitudinal axis to vary the angular relation between the plane of said cutting edges and a horizontal plane, means for positioning and maintaining either end of said tool in leading position, means for positioning and maintaining said cutting edges in a plane parallel to the plane of the desired road surface, and means permitting relative vertical movement of the distributing blade with respect to said cutting edges to create a road surface in a plane parallel to the plane of said cutting edges.

35. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool having a draft connection with said frame, comprising a plurality of parallel cutting edges lying in a plane and adapted to plane material from the surface of the road and Work it in a selected direction, and a leveling and distributing blade adapted to receive planed material from said cutting edges to work said material in the opposite direction while creating a road surface in a selected plane, means for positioning said tool to establish a desired road surface, comprising means for positioning and maintaining either end of said tool in leading position, means for positioning and maintaining said cutting edges in a plane parallel to the plane of the desired road surface, and means for permitting adjustment of said leveling and distributing plate vertically with respect to said cutting edges to create a road surface in a plane parallel to the plane of said cutting edges.

36. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool having a ,draft connection with said frame, comprising a plurality of parallel cutting edges lying in a plane and adapted to plane material from the surface of the road and work it in a selected direction, and a leveling and distributing blade adapted to receive planed material from said cutting edges to work said material in the opposite direction while creating a road surface in a selected plane, means for positioning said tool to establish a desired road surface, comprising means for adjusting said tool about a longitudinal axis to vary the angular relation between the plane of said cutting edges and a horizontal plane, means for positioning and maintaining said cutting edges in a plane parallel to the plane of the desired road surface, and means permitting adjustment to said leveling and distributing plate vertically with respect to said cutting edges to create a road surface in a plane parallel to the plane of said cutting edges.

37. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool having a draft connection with said frame, comprising a plurality of parallel cutting edges lying in a plane and adapted to plane material from the surface of the road and work it in a selected direction, and a leveling and distributing blade adapted to receive planed material from said cutting edges to work said material in the opposite direction while creating a road surface in a selected plane, means for positioning said tool to establish a desired road surface, comprising means for positioning and maintaining said cutting edges in a plane parallel to the plane of the desired road surface, and means for permitting adjustment of the leveling and distributing blade vertically with respect to said cutting edges.

38. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool having a draft connection with said frame, comprising a plurality of parallel cutting edges lying in a plane and adapted to plane material from the surface of the road and work it in a selected direction, and a leveling and distributing blade adapted to receive planed material from said cutting edges to work said material in the opposite direction while creating a road surface in a selected plane, means for positioning said tool to establish a desired road surface, comprising means for positioning and maintaining either end of said tool in leading position, means for positioning and maintaining said cutting edges in a plane parallel to the plane of the desired road surface, means for permitting said leveling and distributing blade to be adjusted vertically with respect to said cutting edges, and means for adjusting either end of said tool vertically to vary the angular relation of the plane of said cutting edges to a horizontal plane.

39. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool having a draft connection with said frame, comprising a plurality of parallel cutting edges lying in a plane and adapted to plane material from the surface of the road and work it in a selected direction, and a leveling and distributing blade adapted to receive planed material from said cutting edges to work said material in the opposite direction while creating a road surface in a selected plane, means for positioning said tool to establish a desired road surface, comprising means for positioning and maintaining said cutting edges in a plane parallel to the plane of the desired road surface,

means permitting adjustment of the leveling and distributing blade verticallywith respect to said cutting edges to create a road surface in a plane parallel to the plane of said cutting edges, and means for adjusting either end of said tool vertically to vary the angular relation of the plane of said cutting edges toia horizontal plane.

40. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool support having a draft connection with said frame, a tool, comprising a plurality of parallel cutting edges lying in a plane and adapted to plane material from the surface of the road and work it in a selected direction, and a leveling and distributing blade adapted to receive planed mate'rial from said cutting edges to work said material in the opposite direction while creating a road surface in a selected plane, means for positioning said tool to establish a desired road surface, comprising aligned pivotal connections between said tool support and said tool, means for adjusting said tool about the axis of said pivotal connections for positioning and maintaining said cutting edges in a plane parallel to the plane of the desired road 100 surface, and pivoted connecting means for permitting adjustment of the leveling and distributing blade vertically with respect to said cutting edges to create a road surface in a plane parallel to the plane of said cutting edges.

41. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool supporthaving a draft connection with said frame, a tool, comprising a subframe having a plurality of parallel cutting edges lying in a plane and adapted to plane material from the surface of the road and work it in a selected direction, and a leveling and distributing blade adapted to receive planed material from said cutting edges to work said material 115 in the opposite direction while creating a road surface in a selected plane, means for positioning said tool to establish a desired road surface, comprising aligned pivotal connections between said tool support and said tool, means for adjusting 120 said tool about the axis of said pivotal connections for positioning and maintaining said cutting edges in a plane parallel to the plane of the desired road surface, second aligned pivotal connections between said leveling and distributing blade and said sub-frame, and yieldable means for permitting said blade to be adjusted vertically about the axis of said second pivotal connections to create a road surface in a selected plane parallel to the plane of said cutting edges.

42. In a road machine for planing and resurfacing a road during traverse thereof, a frame having front and rear supports, a tool having a draft connection with said frame, comprising a plurality of parallel cutting edges lying in aplane and adapted to plane material from the surface of the road and work it in a selected direction, and a leveling and distributing blade adapted to receive planed material from said cutting edges to work said material in the opposite direction while creating a road surface in a selected plane, means for positioning said tool to establish a desired road surface, comprising means for positioning and maintaining either end of said tool in leading position, and means for permitting adjustment of 145 said leveling and distributing blade vertically with respect to said cutting edges to create a road surface in a selected plane parallel to the plane of said cutting edges.

Y JAMES E. CARLSON. 150