US1389125A - Surfacing-machine - Google Patents

Description

A.E. CHAPPELL. SURFACING MACHINE.

APPLICATION FILED OCT. 3| i918.

' Patented Aug. 30, 1921;

2 SHEETS-SHEET I.

A. E. CHAPPELL. SURFACING MACHINE.

APPLICATION FILED OCT. 3. 191B.

Patented Aug. 30,- 1921.

2 SHEETS-SHEET 2.

, w m fiul m UNITED STATES PATENT oFFlcE.

Application filed October a, 1918. Serial no. 280,672. a

To all whom it may concern Be it known that I, ARTHUR E. CHAPPELL,

a citizen of the United- States, residin at Chicago, in the county of Cook and tate of Illinois, have invented certain new and useful Improvements in Surfacing-Machines, of which-the following is a specifi-- provide an improved means for locking the cation.

This invention relates'to floor dressing or surfacing machines which are employedfor the purpose of producing a smooth surface on f10ors,bowlingalleys, etc., and aims to provide a manually operated power driven machine ofthis character which will be simple' and compact in construction, and at the same time strong and durable, and which will readily. permit of the various adjustments of the surfacing tool which are required in order to obtain the most satisfactoryresultsa In these machines it is essential that the surfac'ing'tool, which isusually an emery covered cylinder or drum, be so mounted that it may be accurately adjusted toperfect parallelism with the floor. This has usually been done. by making the bearings of the tool adjustable on and relatively to the frame of the machine. In my present invention these bearings are rigid with the machine frame, andone object of the present invention is to-provide a simple and im- 4 proved means for adjusting the sides of the machine frame vertically relatively to its supporting axle. p

In machines of this kind it has also heretofore been customary to mount the shaft of the surfacing tool in a bearing located at a greater or less distance from one end of the I .tool, and this produces an undesirable lateral vibration or shake in the shaft which is both annoying to the operator and impairs the efliciency of the tool and the accuracy of its work. Another object of the present invention, therefore, is "to ellminate these faults which I accomplish by providing an elongated shaft support having spaced bear:

ings, and a surfacing drum having. an inset head at the end next to the shaft support so that that end of the working surface of the 'drum considerably-overhangs the adjacent bearing? Another objectof my invention is to provide a machine with a reverslble surfacing cylinder and a removable shaft, the shaft being removable from the bearingsand the cylinder being detachable from the shaft so that the. cylinder may be reversed in position or another cylinder may be substituted without changing the shaft, or another shaft may be substituted without changing the cylinder. a

A further object of the invention is to .drum shaft in its bearings at the end of the shaft support opposite that at which the drum is applied, and for keying the'drum on the shaft. as well" as taking up wear and preventing end play of the shaft or the drum on. the shaft: at the same time making it easy'to transfer, the drum and shaft to the opposite side ofthe machine frame, when requlred, for the purpose of o6casionallyreaching portions of the floor not. accessible to the drum inits regularor normal position. j

Still another object of the invention is to provide an improved dampener for a handle-pole or shank which carries the handlebar, designed to cushion and absorb the vibrations of the frame created by the surfacing tool and prevent their transmission to the handle. This is especially useful and desirable in a machine, such as that of the present invention wherein the driving shaft of the surfacing tool is j ournaled in the bearin s that are rigid with the machine frame.

hese and other objects and advantages of the invention will be better appreciated as the same is morefully understood from the following description when considered in connection with the accompanying drawings, wherein -I have shown one practical and workable embodiment of the invention, and in which,' p

Figure 1 isa side elevation of my improved surfacing machine;

Fig. 2 is a substantiall vertical section taken on the line22 of ig. 1, this figure also showing in dotted lines the reversed positionof the surfacing drum and its shaft relatively to the machine frame;

Fig. 3 is, a substantiall vertical section taken on the line 3-3.0f ig; 1

Fig. 4 is an enlarged fragmeiitary detail 7 end of the frame s'upcporting s aft in one ole of the handle against vibrations of the rame. i Y

Referring to the drawings, the frame of the machine comprises a top plate 6, substantially vertical parallel side plates 7 and 8, the former of which extends some distance in advance of the latter, and a narrow front wall 9,-this latter terminating at its lower end in an elongated hub 10 which sup orts the bearings ofthe shaft. of the 'sur acin tool. This frame is supported substantially midway of its ends on a twowheel truck comprising an. axle 11 and a pa r of wheels 12 journaled on opposite ends of said axle. As shown in Figs. 3 and 4, the axle. 11 is mounted at one end in an opening 13 formed in the side wall ,7 near 7 its lower end; and at its other end said 8. The

or closed end of the notch '14. By turning the screw 16, the side 8 of the frame is side 7 and a lock nut 17 is referab y pro-. vided on the screw 16 to c eck accidental of the screw in the shaft. Extendraised or lowered relatively to. the o posite turning 111g through thehnb 10 and supported by anti-friction bearings 18 in each end of the latter. 1s a shaft 19, on which is mounted a' surfacm drum or tool 20. Preferably the outer en of the shaft 19 is provided with a-head .or cap 21 carryin a pin or keg 0 'the drum to lock the latter non-rotatably on,. -;the shaft. The opposite head of the has a central inset portion 23 that overhangs the adjacent end of the shaft supploirting hub 10, thus bringing the anticti'on bearing 18 at that end of the shaft I ."support well within and between the ends of the drum. By thus causing the drum to overhang the adjacent bearing of its T shaft, the lateral vibration or' shake of the shaft and drum is atly reduced as comsared wlth the usua mounting wherein the rum lies at a greater or less distance beyondthe bearing.

The opposite end'of the shaft 19 'projects'beyond the other bearing and carries thereof: a sprocket wheel 24. detachably locked to the shaft'by a set screw 20 or other preferred means. Be end the hub of the sprocket wheel there s fitted on the projectin end of the shaft a sleeve 25, the 1nner en of the sprocket hub while its outer end projects sllghtly beyond the end of the shaft,

gs shown in Fig. 2. The outer end of sleeve 5' is covered by a disk 26 through which passes a screw 27 engggiilif m the end of the she y of which abuts against the end a tapped hole tightening up. r

the screw 27, the shaft 19 is locked securely in its bearings and also adjusted to take up any e'nd play of the shaft or of the drum on the shaft resulting from wear. To prevent accidental disengagement of the screw 27, the disk 26 is 100 ed to the shaft so as to rotate with the latter by a locking pin 28 passing through said disk and into the end of the shaft.- This construction also locks the s rocket wheel 24 against accidental disp acement longitudinally of the shaft 19. u

In case it is desired to transfer the surfacing drum to the opposite side of the machine, it is necessary only to back out thescrew' 27, withdraw the shaft 19 endwise from its bearings and from the drum 20, transfer the drum 20 without inverting it, to the opposite side of the machine frames, insert the shaft 19, turned end for end, and secure its projectin end by the means already described. or looking the shaft in this chan ed position, the inset end 23 is provided wit a hole 29 that is engaged b the locking pin 22, as illustrated in the otted line position of' the parts shown in Fig. 2.

Journaled in and between the side walls 7 and 8 above theshaft 11 is a fanshaft 30 (Fig. 3) e uipped at one end with a sprocket wheel 31. eyed on this shaft is a centrifual' fan 32 housed within a sheet metalcasthe drum on mg 33, this latter having in one side wall thereof a suction opening or inlet 34 that communicates with a' conical induction passage formed by a sheet metalcasing 35 extending between the inner side of the fan illustrated at 37, the armature shaft of which carries. a sprocket wheel 38. A

-sprocket chain 39 trained around the sprocket wheels 38, 31 and 24 serves to drive both the surfacing tool and the fan at proper relative s The e or-shaft carryi the handle by which t e machine is contro led and directed over the floor surface, comprises, as here- 'in shown a lower section 40 having a forked lower end 11, and anupper section 42 secured to the lower section b screws 43," and carrying at its upper end t e transverse handle 44. Onthe section 42 of the pole is mounted a controller 45 for the electric motor, which controller may be of any desired or make, and has nothing todo with cut invention.

Where, as in the present case, the bearings a proved the pres-.

that is secured on the truck shaft of the drum shaft are rigid with the machine frame, the vibrations of the drum and its shaft are, of course, transmitted to the frame and from the latter to the pole and handle. My invention includes a simple de-' vice by which the manual propulsion and guidance of the machine are rendered easier on the operator by cushioning or absorbing the machine frame Vibration. This device is shown principally in the detailed view Fig. 5 wherein 46 designates a bracket plate secured to and beneath the rear edge of the top frame plate 6, and 47 designates a metal strap or yoke secured to and opposite the plate 46. Between the members 46 and 47 are cushions 48 of felt or like yieldable material, between which passes the pole piece 40. A clamping screw 49 threaded through the yoke 47 engages a thin backer or shim 50 by which the cushions 48 are tightly compressed on the shank or pole 40. By this construction the pole and handle are secured to the machine frame with sufficient rigidity for propulsion and guidance purposes, and at the same time the pole and handle are effectively cushioned against the vibrations, which are practically all absorbed by the cushions 48.

Depending from'the underside of the pole member 4:0 is a leg or standard 51 (Fig. l) by which the machine may be supported with the surfacing tool off the floor when not at work in an obvious manner. To the forward edge of the top plate f the frame is attached, by thumb screws 52, a guard or cover '53 that extends down over the forward or advance side of the surfacing cylinder. The'purpose of this guard isto prevent the dust and other material loosened by the surfacing tool from being thrown forwardly of the machine, and to assist the action of the fan in drawing the dust through the machine into the dust receptacle or catcher. A handle 54 is provided at the front of the machine by which it may be lifted when necessary.

It is believed that the construction and operation of my invention will be readily understood from the foregoing without further description, and it should be obvious that I have rovided a floor dressing machine which. is extremely simple and compact in construction, in which the surfacing tool may be readily adjusted to perfect parallelism with the floor and may'readily be transferred to the opposite side of the machine when necessary or desirable, in which the vibrations of the machine are effectually cushioned and prevented from reaching the operating handle to any serious extent, and in which all of the parts can be economically made and readily assembled.

The invention, however, is not limited to the structural details shown and described tures differing widely in mechanical detail from those employed herein for purposes of illustration merely.

I claim:

1. In a surfacing machine, the combination of a frame having substantially vertical side members, one of said members being formed with a shaft-receiving opening near its lower edge and the other with a shaft-receiving notch in its lower edge, a shaft mounted in said opening and notch, an adjusting screwthreaded through said shaft and abutting against the top of said notch, wheels on the ends of said axle, and a surfacing tool carried by said frame.

2. In a surfacing machine, the combination of a frame provided with an elongated bearing, a shaft journaled therein, a surfacing cylinder having spaced end walls adapted to receive said shaft, one of said end walls being spaced inwardly from the end of the cylinder to dispose said end around said bearing, means for locking said cylinder against rotation relatively to said shaft, means for rotating said shaft, and means for retaining said shaft in its bearing.

3. In a surfacing machin'e, the combination of a frame having a narrow projecting portion provided with an elongated bearing extending laterally beyond said portion, a shaft reversibly journaled in said bearing and provided at one end with a locking pin, a surfacing cylinder mounted upon one end of said shaft and locked thereto by said pin, said cylinder'overlapping and surrounding the extended end of said bearing, means at the other end of said shaft for preventing displacement of the shaft from its bearing and for regulating the end play of said shaft in its bearing and a sprocket wheel mounted on said shaft.

v 4. In a surfacing machine, the combination of a frame provided with an elongated bearing, a shaft, a surfacing cylinder reversibly mounted thereon and adapted in one position to overlap one end of said bearing, means for locking said shaft in the bearing, and detachable'means for driving said shaft, said driving means being removable to permit endwise reversal of the shaft so that said cylinder may be disposed at will upon either side of thev bearing and reversed endwise upon the shaft 5. In a surfacing machine, the combination of a frame, a shaft-support carried by said frame, a shaft j ournaled in and projecting at its ends beyond the ends of said shaft-support and carrying'a pin key, a surfacing drum formed with a hole and mounted on one projecting end of said shaft, and means on the other projecting end of said shaft for drawing said shaft endwise to key it to said drum- 6. In a surfacing machine, the'combination of a frame, a shaft-support carried by said frame, a shaft journaled in and projecting at its ends beyond the ends of said shaft-support and carrying a pin, a surfacing drum formed with a hole for said pin and mounted on one Erojecting endof said shaft, a driving memer fast on the other projecting end of said shaft, a sleeve mounted on said last-named shaft-end, said sleeve abutting at its inner end against the hub of said driving member and at its outer end extending beyond said last-named shaft-end, a disk bearing against the outer end of said sleeve, and an adjusting and lockin screw passing through said disk and tapped into said last-named shaft-end.

7 In a surfacing machine, the combination of a frame having a narrow forwardly extending portion terminating in a horizontal bearing projecting laterally in opposite directions beyond said portion, a surfacin cylinder having a diametral wall at one end and an inwardly recessed wall at the o posite end adapted to receive and surround the projecting end of said bearing, a shaft j ournaled in said bearing and pro ecting outwardly therefrom at each end, means carried by one end of said shaft for detachably engaging with either end wall of said cylinder to lock said cylinder against rotation on the shaft, a

driving wheel mounted on the other projecting end of said shaft, and means carried by said end of the shaft for locking said wheel against displacement and for taking up end play in the shaft, said shaft being reversible in said bearing and said cylinder being reversible on said shaft.

ARTHUR E. CHAPPELL.

Images