US1493147A - Surfacing machine - Google Patents

Description

May 6 ,1924; 1,493,147

A. E. CHAPPELL.

SURFACING MACHINE Filed Dec. 6. 1922 z sneezs-sheet 1 Patented May 6, 1924.

UNITED STATES main PATENT OFFICE.

ARTHUR E. CHAPPELL, OF WAUKEGAN, ILLINOIS.

sU'RrAoINo MACHINE.

Application filed December 6, 1922. Serial at. 605,179.

To all whom it mil/y concern:

Be it known that I, ARTHUR E. CHAPPE'LL, a citizen of the United States, residing at Waukegan, in the county of Lake and State of Illinois, have invented certain new and useful Improvements in. Surfacing Machines, of which the following is a speci-- 7 or from the floor to give the desired depth ofcut. Furthermore, machines have been designed in whichthe frame, or a portion thereof, carrying the surfacing cylinder, has been provided with adjusting mechanism by which the position of the cylinder' could be adjusted. All of such machines, however, possess such rigidity and inflexibility that the surfacing cylinder is 'n'o't'permitted to accommodate itself, to various conditions of the floor, and if the travel of the machine is stopped, the cylinder makes a groove or at least a mark where itcontinues to operate for. any considerable period of time. I TOne of the purposes of my present invention is to provide mechanism which will be under the constant controlof the operator, and whereby the pressure of the surfacing cylinder upon the floor or other surface being worked can be regulated and increased or diminished at will as the machine is traveling along. The operator is therefore able to feel the irregularities' and high spots in the floor and can increase the pressure of the surfacing cylinder when required, or can N diminish it when low spots are encountered; and furthermore, when turning or stopping the machine, the cylinder. can be lifted from the floor withoiit'the' necessity of disturbing its adjustmerits or-of manipulating a normally locked adjusting lever.- v

Anotherfipurpos'e of the invention is to provide a machine of the character indicase; which Willbe eeeable cf accurate ad'- justment and control; one in which thesurfacing cylinder will be yieldingly urged into contact with the surface being worked; and one which will be simple in construction, economical to manufacture, and accurate and efiioient in operation. To facilitate an understanding of my invention, I have illustrated on the accompanying drawings a preferred embodiment thereof, and referring to the drawings:

Fig. l is a side elevation of a machine embodying my invention;

Fig. 2 is a rearelevation the'reof;

Fig. 3 is a sectional view ,on the line 33,

of Fig. 2; and v Fig. 4 isa fragmentary sectional view on the line 44 of Fig. 1.

From an inspection of the drawings it will be observed that my improved machine comprises a frame structure 5, preferably 1 ofbex-like construction, adapted to accommodate the dust delivering fan 6 on-the inside thereof,".and to carry the driving motor? which is mounted on the top of the frame and connected by a driving chain 8 withthe'sprocket wheel 9 of the fan and the driving'sprocket wheel l1 of the surfacing cylinder 12. This cylinder may be mounted in any preferred manner, but is illustrated herein as carried between the forward ends of a pair of arms 13, extending respectively throughfront and rear guide members 14 and. 15, in whichthese arms are yieldingly retained bybuifer blocks 16 adapted to be adjusted by adjusting screws 17. r

The frame is carried principally by a pair of wheels 18 mounted upon a transversely extending shaft 19,, which is disposed substantially midway between the ends of the frame structure so that the frame isnearly balanced thereon, the rear end being slightly heavier so that the'frame tends to tilt downwardly at the back, and the wheels being of sufficientheight to pen. mit a degree of tilting of the frame, which will bring the surfacing cylinder into contact with the floor, orclear it some distance from the floor, as shown in Fig. 1, in which position the cylinder is of course inoperative,

To the rear end ofthe framethere is rigidly attached an upwardly and rear wardly projecting'bar or pole 21, provided at it's'upper end. with a handle 22 disposed in accessible position to the operator, who walks behind the machine." In order to be accessibly positioned, the starting and controlling box 23 of the motor is preferably mounted upon this bar, as shown in Fig. 1. For the purpose of tilting the frame about the axle 19, so as to urge the surfacingcylinder against the floor with any desired degree of pressure, I have provided at the rear end of the frame auxiliary supporting caster wheels 24, rotatably mounted in ball bearings 25,- which are carried by a CIOSS? bar 26. The ends of this cross-bar are engaged and adapted to vertically'slide in guideways 27 formed in the rear ends of the side members of the frame; and to permit of a considerable latitude of vertical movement, the ends of the bar 26 are .provided with upwardly projecting gui-de:.portions 28 adapted for. relative vertical movementwith respect tothe guides .27, as will be-apparent from Figs. Qand 3.;

'Upon the bar 21,;fin proximity. to the handle 22, there is} pivotallyfmounted at 29 a hand lever31,'whichiextends beneath and in the general direction of one end of thehandle, the short endof thislever being adjustably' connected by a'screw clamp 32 with the upper section 33 ofaconnecting rod, the lower section 34: of which-is connected by a bolt 35with the bar 26. It will be apparent that-by swinging the lever 31 from the full line to the dotted line position shown in Fig.2, therear endlof the frame will be elevated, thus depressing thesurfacing roll into engagement with the floor, and upon release of this lever the frame will tilt in the opposite directionto clear the surfacing cylinder fromthe fioor; -In order to, provideffor. flexibility independently of the .movementlof the, lever 31-, which permits a limited tilting movement of the frame, I have interposed between the sections 33 and 84: of the thrust rod a coiled expansionspring 36 (Fig. 4). .A sleeve 37, secured to one of the. rod sections by a pin 38, surrounds the spring and receives the opposed end of the otherrod section, which is equipped witha pin 37 adapted to slide in a slot 39 formed in'one sideof thesleeve. A downward thrust. of the rod section 33 will therefore be yieldingly transmitted to thesection 34, and consequently tothe auxil-v iary caster wheels 24, andanyuslight vertic'al vibratory movements of. the surfacing cylinder, are accordingly. absorbedby. the spring instead of beingtransmitted in. full force to the. hand .of: the operator,;,which is ar pingtheleven 31.. Inthe operation ofmy machinethe op-l erator grasps theQhandles ;22. ,withrboth hands, the fil'igers of-one hand" at the same time grasping the lever 31 and pullingnit upwardly toward. the rhandlen22. This movement ofthelever exerts a downward.

thrust, upon ,thecaster .wheels, :which. re sults 1n tilting the .rear end of :the machine upwardly, and the forward end downwardly to engage the surfacing cylinder with the floor. As the machine progresses across the floor, any irregularities in the floor surface'may' be detected by the operator by the feel of the lever 31, and he may therefore increase the pressure of the cylinder when high spots are encountered, or re lieve the pressure when low spots are encountered. The surfacing cylinder is therefore at all times under the direct control and manipulation of the operator, who is able to regulate the pressure of the cylinder to meet the requirements and conditions of the surface being worked. When the travel dfithe machine isto be stopped or when turning around, the cylinder can be cleared from the .floor by simply releasing the: lever 31. The operator is therefore notobliged to either disturbtheadjustments of the cyl; inder or to release .and manipulate amen nally. locked adjusting lever, as is custom; arily necessary in machines of ,thisqgen eralcharacter l," 3* I i It is believedthatthe-principles and, the advantages of my invention will. be understoodwithout further description, and it shouldbemanifest thatit is capable ofem+ bodiment in. constructions differing materially in their detailsfrom those illustrated and described,; without departing 'fro m the scope o f theinventiomas defined in thefollowing claims. v j Irclaim: In a surfacing machinethe combina; tion of a, v frame structure, a surfacing cylinder mounted on the, forward end thereof, supporting wheels intermediate the ;ends 'of said, frame, a handle connectedwith the rear end of the frame, .a bar having-,iupturned ends slidably connected wit-lithe rear. endof saidframe, a caster wheel supporting said bar, ahand lever adjacentsaid handle, and a connection between said lever and said bar whereby relative vertical movement between said caster wheel and; the rearendof said frame maybe imparted upon -m an-ipu5 lation of said lever. I

2. In a surfacing machine the combinae tionef a frame, supporting wheels inter mediate the ends thereofxabout which: said frame is adapted to tilt. a surfacingi .tool at the forward en'd'of said frame, a barslidably associatedwith the rear end, of said frame, a. casten wheelnsupporting said. bar, a handle 'connected'with the rear-end of the frame, a lever. pivotallymounted in posi-, tion to :be grasped -.by the hand ofthe operator engaging said handle,'rand a connection between said lever and saidbarfor regulating' the, vertical position of I said bar. withrespect to the rear end of saidframe. :In ,asllrfacing machine thecombination of p a. frame, supporting-wheels Tintermed a e th ed$ he 0f tr ns er r tending bar slidably associated with the rear end of said frame, a pair of caster wheels supporting said bar, a handle rigidly connected with the rear end of said frame, a controlling lever disposed in proximity to said handle, and a yielding connection between said lever and said bar.

4. In a surfacing machine the combination of a frame, a pair of main supporting Wheels about which said frame is adapted to tilt, a pair of caster Wheels slidably associated with the rear end of said frame, a handle, a controlling lever in proximity to said handle, and a yieldable connection between said lever and said caster wheels.

5. In a surfacing machine the combination of a frame, a pair of supporting wheels therefor about which the frame is adapted to tilt, a caster wheel slidably associated with the rear end of said frame, a bar rigidly connected with said frame, a handle carried by the bar, a lever pivotally mounted on said bar in proximity to said handle, and a connection between said lever and vsaid caster Wheel, including a spring providing resiliency between said caster wheel and said lever.

6. In a surfacing machine the-combination of a frame, supporting means therefor about which said frame is adapted to tilt, auxiliary supporting means slidably connected with the rear end of said frame, a bar rigidly mounted on the frame, a handle carried by the bar, a lever pivoted on the bar adjacent to the handle, a rod adjustably connected with said lever, a connect-ion between said rod and said auxiliary supporting means, and a spring providing flexibility in said rod.

A. E. CHAPPELL.

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