US1611412A

US1611412A - Concrete-road-finishing machine

Info

Publication number: US1611412A
Application number: US581043A
Authority: US
Inventors: Edward G Carr
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-08-11
Filing date: 1922-08-11
Publication date: 1926-12-21
Anticipated expiration: 1943-12-21

Description

Dec. 21 1926. 1,611,412

E. G. CARR CONCRETE ROAD FINISHING MACHINE Filed August 11, 1922 3 Sheets-Sheet 1 INVENTOR. M W W4 A TTORNEYJ'.

Dec. 21 1926. 1,611,412

E. G. CARR CONCRETE ROAD FINISHING MACHINE Filed August 11, 1922 3 Sheets-Sheet INVENTOR.

E. G. CARR CONCRETE ROAD FINISHING MACHINE Dec. '21, 1926.

1922 3 Sheets-Sheet 3 F i led August 11 r L m: 1

R MH

- INVENTOR.

ATTORNEYS.

Patented Dec. 21, 1926.

UNITED STATES EDWARD G. CARR, OF CHICAGO, ILLINOIS.

CONCRETE-ROAD-FINISHING MACHINE. H E I E D Application filed. August 11, 1922. Serial No. 581,043.

This invention relates to concrete road finishing machines, and the object of the invention is to improve the construction and operation of concrete road finishing machines in the manner to be hereinafter described and claimed.

Referring to the drawings which accompany this specification and form a part hereof, which drawings illustrate an embodiment of this invention, and on which drawings the same reference characters are used to designate the same parts wherever they may appear in each of theseveral views, Fig. 1 is a plan view of a concrete road finishing machine, parts being broken away; Fig. 2' is a side elevation of parts of the machine; Fig. 3 is a. front elevation of parts of the machine; Fig. 4; is a vertical section, on an enlarged scale, taken on the line 44 on Fig. 1, looking in the direction indicated by the arrows' Fi s. 5 and 6 are views similar to Fig. 4, but showing the smoothing templet tilted to different positions; Fig. 7 is a vertical section taken on the line 77 on Fig. 1, looking in the direction indicated by the arrows; Fig. 8 is an elevation of parts of the machine, the line of sight being directed longitudinally of the smoothing templet; Fig. 9 is a plan view of an end of the spreading templet and associated parts; Fig. 10 is a vertical section taken on the line 101O on Fig. 2, looking in the direction indicated by the arrows; Fig. 11 is an elevation of parts of the smoothing templet; and Fig. 12 is a perspective view of an end of the smoothing templet.

Referring to the drawings, the reference numeral 1 designates a frame of any suitable construction which is mounted on wheels 2. The wheels 2 are adapted to run upon the fern-

1s

3 and 4 and may be rotated by the motor 5 to propel the machine in either direction. The motor 5 is illustrated by the drawings as an internal combustion motor, or engine, which runs, or turns over, in only one direction and to provide for the propulsion of the machine in either direction a sprocket wheel 6' and sprocket chain 7 can rotate the sprocket wheel 8, the shaft 9, the gear 10, and the sprocket wheel 11. The sprocket wheel 8, the gear 10, and the sprocket wheel 11 are all connected to the shaft 9 in any suitable manner so that these several parts rotate, as a unit in unison. The gear 10 meshes with the gear 12, which is a loose gear on the shaft 13, and the sprocket wheel 15, which is a loose sprocket wheel on the shaft 13, is connected with the sprocket wheel 11 by the sprocket chain 14. The gear 12 1s provided with a clutch member 16, and the sprocket wheel 15 is provided with a clutch member 17. It will, of course, be understood the the gear 12 and the sprocket wheel 15 are restrained from longitudinal movements on the shaft 13 while being free to permit of relative movements of rotation. A clutch 18 is secured to the shaft 13 so as to rotate therewith while-being movable longitudinally thereof, and the clutch 18 may be moved by a clutch-rod 19 into engagement either with the clutch member 16 or the clutch'member 17, or the clutch 18 may be moved to an intermediate or neutral position where it is disengaged from both of the clutch members 16 and 17. With the motor 5'runn1ng, it is thus possible to move the clutch 18 to such positions that the shaft 13' can be rotated in either direction, or can be prevented from being rotated, 50 that the machine can be propelled forward or back ward, or can be stopped. The shaft 18 is extended to rotate longitudinal shafts 20, one at each side of the machine, by gear mechanism contained in housings 21 and 22, and the longitudinal shafts are geared to the wheels 2 by gear mechanism contained in journal boxes 23.

The frame 1 supports a spreading templet 24 and a float or finisher 25. A smoothing templet 26 is located between the spreading templet 24 and the float 25, and is so arranged that it may be supported by the

forms

3 and 4, or may be raised from the forms and be supported from the frame 1 of the machine. I

The float or finisher consists of a piece of textile fabric, or other suitable material, secured to a frame 27. The frame 27 is supported by bearings 28, which are secured to the frame 1, and the frame 27 is both reciprocable and rotatable in the bearings 28 so that it can be reciprocated longitudinally or can be turned up and down to re move the float 25 from the concrete surface or to place it in contact with the concrete surface.

The spreading templet 24, the float or finisher 25, and the smoothing templet- 26 are severally rcciprocable longitu inally of themselves, and may be reciprocated in the following manner. A crank device, such as an eccentric 29 for example, may be loosely mounted on the shaft 13 but restrained from longitudinal movements with respect thereto, and be provided with a clutch member 30 adapted to be engaged by a clutch 31, which is splined, for example, to the shaft 13. The.

with the motion transmitting device by a link 38 which is loosely pivoted at both ends to permit the smoothing te1nplet'26 to bore ciprocated and raised or lowered. lever 39 is pivoted to the frame 1 by the p vot 40 and is lootely, pivotally connected with the smoothing templet 26 by a link 41 at one end, while its other end is connected with the frame 27 in any suitable manner as, for ex ample, by being bifurcated and straddling the frame 27 between two collars 42 and 43 which are secured to the frame 27. The extent of movement of the spreading templet 24, the smoothing templet 26 and the float or finisher 25, in their several longitudinal reciprocations, can be readily provided for by the distances the links 37 and 38 are located from the pivot 36, and the distance the link 41 is located from the pivot 40.

It is preferred that the spreading templet 24 reciprocate horizontally and it may be supported upon antifrietion rollers 44 which may run in guides 45 secured to the frame 1. The antifriction rollers 44 are placed upon the horizontal ends of

cranks

46 and 47, upon which the spreading templet 24 is hung. The

cranks

46 and 47 are provided with operating levers 48 and 49 which have hand grips 50 and 51 to control pawls which are adapted to seat in notches in

sectors

52 and 53 which are secured to the spreading templet 24. It will be evident that, by mampulating the operating'levers 48 and 49, the

cranks

46 and 47 can be turned so as to elevate or lower the spreading templet 24. The operating levers 48 and 49 are connected for simultaneous movements by a rod 54 so that the spreading templet can be raised or lowered from either side of the machine to suit the convenience of the operator, and a ring 55 may be slipped over one operating lever and its hand gri to hold the pawl for that hand grip out o engagement with the sector for that particular operating lever. Antifrict-ion rollers may be provided to take thrust from the spreading templet 24. Fig. l of the drawings shows two such antifriction rollers 56 connected to the frame 1- The spreading templet 24 is illustrated by the drawings as shorter than the distance between the

forms

3 and 4 and the extent of vertical movement provided for by the

cranks

46 and 47 is suflieient to enable the spreading templet 24 to be lowered between the forms or to be raised above the forms. \Vith such a construction, the spreading templet 24 can be lowered between the forms to spread a sub-base of concrete for a brick or stone pavement, or for receiving reinforcing members. or for any spreadin purpose whatever, and the spreading templet 24 can be raised to spread material to the height of the forms or above. The vertical lift of the spreading templet 24 should be sufficient so that it can be raised above the surface which it has formed when spreading so as toclear the same and leave the surface undisturbed when the machine is run back over a surface, for example.

The

reference numerals

57 and 58 designate plows, which'also serve as form cleaners, which are preferably yieldingly secured to the frame 1. These plows 57 and 58 extend from outside the forms, inwardly and backwardly so as to be at all times, at their inner ends, ih front of the ends of the spreading templet 24, notwithstanding the fact that the spreading templet 24 is being reciprocated. The plows are secured to pivoted U-shaped frames 59 and are yieldingly held down by spiral springs 60 which surround links 61 and are held between collars 62 and brace members 63. The links 61 have bent ends which pass through holes in the U- shaped frames 59 and may be held in place by cotter pins 64. The collars 62 may be held in position by cotter pins 65. The links 61 pass through holes in the brace members 63 and are provided-with nuts 66 to limit the downward movements of the plows, so that the plows can be set to just clean the forms without bearing or scrubbing on the form". The spreading templet 24 is provided with rakers 66 at each end which incline inwardly and backwardly to prevent material being pushed out over the forms as the spreading templet is reciprocated and when it is working at the height of the tops of the forms or above. \Vhen the spreading templet is working at the height of-the tops of the forms or above, the rakers 66 are, in part, behind the

plows

57 and 58, and it will be evident that the spreading templet, as it is reciprocated, cannot push material oif over the forms. In other word's. the ends of the spreading templet cannot push material endwise because the plows and rakers move the material to points inside the ends of the spreading templet. The

plows

57 and 58 are provided with parts 67 to be contacted by the spreading templet 24 to lift the plows when the spreading templet 24 is elevated t an out of the way position.

ill)

ltll) in all directions and its purpose is to scrape any pebbles, sand or cement mortar, or other obstructions, from the forms in advance of the smoothing templet 26 which is intended to ride accurately upon the forms. The form scraper 68 is illustrated by the drawings as composed of a fiat plate 69 provided with elongated slots 70 for bolts 71 whlch adjustably secure it to spiral springs 72 bolted to a )iece of angle ir0n 73 which is fastened to the frame 1.

The smoothing templet 26 is positioned lengthwise of the machine by radius rods 74 and 7 5 which are pivoted to the smoothing templet 26 and to eccentric-straps 76 and 77 by

vertical pivots

78, 79, 80 and 81. The eccentric-straps 7 6 and 7 7 surround eccentrics 82 and 83 which form conven ent crank members for tilting the smoothing templet 26. The eccentrics 82 and 83 are fast on a shaft 84 which is supported by the frame of the machine, and it will be evidentthat by rocking the shaft 84 the smoothing templet 26 can be placed flat, or horizontal, as shown by Fig. 4 of the drawings, or one edge or the other can be tilted up, as shown by Figs. 5 and 6 of the drawings. The smoothing templet. 26, when inuse, will be supported by the forms and, assuming a direction of movement of the machine to advance the smoothing templet 26 from leftto right when looking at Figs. 4, 5 and 6 of the drawings, the smoothing templet may be kept flat as shown by Fig; 4, or its leading edge may be raised, as shown by Fig. 6, to smooth and compress. If the concrete should be a trifle high, the smoothing templet 26 can be tilted with its following edge elevated, as shown by Fig. 5, so that its lead ing edge will have a more pronounced pushing tendency and not tend to ride over the concrete. It is not inaccurate to describe the ings, as a digging tendency, bearing in mind, however, that the smoothing templet 26 is restrained from downward movement by the.

forms upon which it rests, but that it could move downward to the forms if it were ele-' vated above the formsby concrete. The shaft 84 can be rocked, and the smoothing templet 26 be tilted, by the hand levers 85 and 86 which aresecured to the shaft 84 and which may be retained in selected positions by hand grips 87 and 88 which control pawls adapted to engage in notches in

sectors

89 and 90 which are fixed to the frame of the machine. One pawl can be retained disengaged from its sector by a ring slip-over a hand lever and its hand grip in the manner already de scribed in connection with the operating le-' vers and hand grips for the spreading templet 24. Y

' The smoothing templet 26 can be raised from the forms and the. concrete and be supported from the frame 1 of the machine by chains 91 and 92 which are attached thereto and to

drums

93 and 94 which are secured to a shaft 95 supported'by the frame 1 of the machine. The shaft 95 can be rotated in any suitable or convenient manner and retained in a predetermined position, with the smoothing templet raised or elevated, by any suitable mechanism as, for example, a pawl, hand grip, and lever mechanism, not

shown, coacting with a fixed sector 96 in the same manner as the shaft 84 is operated, it being understood that the

drums

93 and 94 with such a construction are large enough to wind up the chains 91 and 92 to the extent required .for the rocking movement which can be given tothe shaft 95. WVhen the smoothing templet 26 is lowered onto the forms, the chains 91 and 92 will be slack enough to permit the longitudinal reciprocatilonsdof the smoothing templet 26 contemate L The smoothing templet26 is illustrated by the drawing as being disposed obliquely to the direction of movement of the machine,

or obliquely with respect to the

forms

3 and 4, and, when the machine is in motion,

and fnoving in either direction, the smoothing templet 26 will tend to move material sideways, and one of the objects of this invention is to move material away from the forms towards the center of the road to keep building up the crown of the road, or keep maintaining the crown of the road. Both the spreading templet 24 and the smoothing templet 26 have their under surfaces arched or cambered to conform to the crown of the road but it is difiicult to handle cement mortar without rubbing out the crown of the road. The smoothing templet 26 is illustrated by the drawings as composed of two

planks

97 and 98, with a top 99 to prevent material from accidentally getting into the space between the planks. A bottom 100 is secured to the lower edges of the planks. As a matter of convenience I prefer to use channel iron for the bottom 100 as the flanges of the channel iron can be fastened to the planks by fastenings 101, leaving thescrewthreaded bosses 106 are secured to the top 99 and a screw 107, with right-hand threads atone end and with left-hand threads at its other end is provided at each end to engage with the correspondingly screwthreaded bosses 105 and 106.

It is evident that by turning the screws 107 the

ends

102 and 103 of the bottom can be moved away from the top 99 and the

planks

97 and 98. If the smoothing templet 26 is restin" upon the forms and a screw 107 is turned in the direction to separate the top and the bottom, the top 99 and the planks at that end will be raised or elevated. Each screw 107 is provided with a lever 108 for turning it and a rod 109 is also connected with the lever 108 and extends between the planks .97 and 98 to the opposite side of the machine so that both screws can be operated from either side of the machine. The operation is as follows. Looking at Fig. 1 of the drawing and assuming that been turned to raise the right hand end of the smoothing templet to render it inactive on the down slope of the crown of the road and the left hand half of the smoothing templet willtend to crowd material away from the form 8 towards the center of the road and so lend to build up the crown of the road or maintain the crown of the road. If the direction of the movement of the machine be reversed, the float 25 will be turned up out of contact with the concrete, the screw at the right hand end of the smoothing templet will be turned to lower that end of the templet and the screw at the-left hand end of the smoothing templet will be turned to raise the left hand end of the smoothing templet to .render it inactive. In this manner, first one side of the road can be operated upon and then the other and the crown of the road be preserved.

The

reference numerals

110 and 111 designate rakers connected to the smoothing templet 26 to rake material away ,from the forms towards the center of the road. The rakerllO is illustrated as a triangular piece of sheet metal with

upturned edges

112, 113 and 114 and one upturned edge is fastened to a flange of the end of the channel'bar bot- V tom 100. The size of the raker 110 should lower surface of the channel iron bottom 100. Anarm 120 is provided with an antifriction. roller 121 and the frame 1' has. a

track member 122 pivoted to it by a pivot 123. The track member 122 is provided with a track 124 which is bent downwardly at its outer end and which is shorter than the reciprocating stroke of the smoothing templet 26. The track member 122 is extended beyond the pivot 123to form a stop arm 125 which projects under the frame 1 and prevents the track 124 from being depressed beroller 121 will be higher than the downwardly bent end of the track 124 and will ride up over the track 124, lifting the

teeth

116, 117 and 118, so that there will be no possibility of the teeth contacting with any material which might be otherwise contacted with. When the smoothing templet 26 has nearly'reached the limit of its movement to the right, the antifriction roller 121 will reach the end of the track 124 and drop over the end 'of the same" letting the raker 111 drop against the stop 119.- On the reciprocation of the smoothing templet 26 in the opoosite direction, the antifriction roller 121 will run under the track 124 and will elevate thesame when the downwardly bent end of the track is reached and pass into the clear. The track member 122 will drop until its stop arm 125 contacts with the frame 1, and the parts will'then be in position for re peating the cycle of operations. The action of the raker 111 will be to lift over and rake back towards the centenof the road.

The action of the raker 110 will be to rake material, which may be high, towards the center of the road and there will be no tendency to push material over the form because the edge 114 is never inside the form.

The reference numeral 126 designates a skid-jack which is now well known and does not need to be specifically described here.

The operation of the machine will be readil understood from the foregoing descriptlon. The spreading templet 24 can be lowered between the forms for the purposes described, or can be set at the level of the forms, or above the level of the forms. When the spreading templet 24 is raised to its extreme position, the

plows

57 and 58 will be lifted. hen the machine is being run backward, the float or finisher 25, and its frame '27, will be turned up in the customary manner. The screws 107 do not fit within the bosses 105 and 106 so tightly as to prevent warping or twisting of the ends of the bottom 100 of the smoothing templet 26 and these ends will lie flat on the forms and the raker 110 will also lie flat on the form.

The trailing end of: the smoothing tem-' plet 26 will be raised by its screw 107 to render the part of the smoothing templet over the down slope from the crown inactive While'the leading end of the smoothing templet will incline according to the crown on its side of the road and will hug the form on its side of the road.

The under side of the spreading templet 24, While arched to the crown of the road, 1s preferablyv flat or horizontal lengthwise of the roadso as to act also as a smoothing templet. In other words, its front lower edge will determine a'surface by spreading action while its under surface will act with a smoothing action upon the surface made or determined. This is of special importance when the spreading templet is being used on concrete below the level of the tops of the forms.

lVhat is claimed is:

1. The combination with a smoothing templet adapted to engage with forms at both ends'and to be reciprocated longitudinally of itself, of means for rendering a part only of said templet inactive.

2. The combination with a smoothing templet adapted to be reciprocated longitudinally of itself, and'provided with means to contact with forms, of means for elevating one end of the templet while leaving the other end of the templet in. position to work on the other side of a road.

3. The combination in a smoothing templet, of a rigid part adapted to contact with and Work upon the concrete a relatively movable end part, and means to adjust said parts vertically with relation to each other.

4. The combination in a concrete road finishing machine, of a smoothing templet including a rigid part, adapted to contact with and work concrete, and an end part relatively movable vertically with respect to said rigid part, means to vary the relative positions of said parts, and means. to reciprocate said templet longitudinally of itself.

5. The combination with a smoothing templet, of means to reciprocate the templet longitudinally of itself, and means for tilting the templet transversely with respect to its length so as to work upon concrete with an edge of the templet.

6. The combination in a concrete road finishing machine, of a smoothing templ t,

means to reciprocate the templet longitudinally of itself, and rakers to move material towards the center of a road.

7. The combination in a concrete road finishing machine, of a smoothing templet, means for reciprocating the templet lon itudinally of itself, a raker,-and means or elevating the raker when the templet is moving in one direction.

8. The combination in a concrete road finishing machine, of a smoothing tem let, radius rods, means for reciprocating t e emplet longitudinally of itself, means for raising an end of the templet independently of the other end, means for tilting the templet transversely of itself so as to work concrete with an edge of the templet, andmeans for elevating the templet from the forms.

9. The combination in a concrete road finishing machine, of a reciprocatablespreading templet, a reciprocatable smoothing templet, and a reciprocatable float or finisher, in such close relationship to each other that the concrete is in the same unset plastic condition under the smoothing templet and the float or finisher as when it has been passed by the spreading templet.

10. The combination in a. concrete road finishing machine, of plows, a reciprocatable spreading templet, an oblique reciprocatable smoothing templet adapted to rest upon the forms, means for tilting the smoothing templet, means, for rendering a part of the smoothing templet inactive, a float or finish- -er, and means for reciprocating the spreading templet. the smoothing templet and the float or finisher.

11. The combination with a concrete road finishing machine, of a form cleaner plate, spiral springs for supporting the cleaner plate from the machine, and means for adjusting the form cleaner to the form.

12. The combination with a frame adapted to be supported by forms, of a reciprocatable spreading templet of less length than the width between the forms, and means for setting the. spreading templet to difl'erent elevations.

13. The combination with a frame adapted to be supported by forms, of a reciprocatable spreading and smoothing templet of less length than the distance between the forms, rakersat the ends of the templet, means for reciprocating the templet longitudinally of itself, and means for changing the elevation of the templet.

I 14. The combination with a frame adapted to be supported by forms, of a reciprooatable spreading templet, plows. means to reciprocate the spreading templet, means to chan e the elevation of the spreading templet and to elevate the plows.

15. The combination with a concrete road finishing machine, of pivoted plows, means for limiting the movements of the plows towards the forms, and yieldable means for normally holding the plows in predetermined ositions.

In witness whereof I hereto afiix my signature.

EDWARD G. CARR.

plate with respect 7 ill) CERTIFICATE OF CORRECTION.

Patent No. 1,611,412 granted December 21, 1926.

to EDWARD G. 0mm.

It is hereby certified that error appears in the printed specification of the above mentioned patent requiring correction as follows: Page 2 line 111, for the numeral "66" read "660" and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 15th day of February,- A. D. 1927.

William A. Kinnan,

Seal. Acting Commissioner of Patents