US1571571A

US1571571A - Base and floor border polishing machine

Info

Publication number: US1571571A
Application number: US744136A
Authority: US
Inventors: Cavicchi Ercole
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-10-17
Filing date: 1924-10-17
Publication date: 1926-02-02
Anticipated expiration: 1943-02-02

Description

E. GAVHQCMH BASE AND FLOOR BORDER `FOLISHNG MACHINE" 2 Sheets-Sheet l E.. @AVHQCHH BASE AND FLOOR BORDER POJISHINGMAGHINE Filed oct. w. 1921s 2 sheets-shew 2 ,Patentea Febfz, 1926.

UNITED STATES PATENT OFFICE ERCOLE ICAVICCHI, F QUINCY, IMASSACHIUSETTS.`

BASE ANI) FLOOR BORDER POLISHING MACHINE.

i Application led October 17, (1924. Serial No. 744,186.

-. 'To all whom it may (1o/mem:

Be it known that I, ERCOLE GAVICGHI, a

citizen of thej United States, and a resil-dent of. Quincy, county of Norfolk, State in surfacing machines and the object there-- of Massachusetts, have invented an Improvement in Base and Floor Border Polishing Machines, of which the following description,l in -connection with the accompanying drawing,` is a specification, like characters onthe drawing representing like parts.

This-[invention relates to improvements of isjto "provide a surfacing machinev in which the surfacing tool `can beset at any required .'position.

More particularly thefinvention relates l tol surfacing machines for surfacing the borders of oors or walls close to their line of vjunction.where usual iioor surfacers cannot reach, and, also which ma be. operated to surface straight or beveled junctions between the Walland base, or curved junctionssuch as are vcommonly known y as sanitary cove bases.

A further object of the invention is to provide a ioor surfacer adapted to sur,

N face stair treads, steps, and other classes of work whichh'ave not heretofore beenl capable of being treatedby a power actuated surfacing machine.A y

Another object of the invention is to proy vide, a surfacing tool having a frame supportinga motor and" a tool so mounted upon wheels that the frame'iscapable of universal movement.

'A further object of the invention is tol provide a machine of this` character with means `for conveniently. applying pressure to the rotatingtool either in the direction of its axis or when the-tool is in any operative position.

, A further ob'ect of theiinvention is to provide-'a surfacing machineof the, class described in which the motor-supporting frame is mounted upon Wheels which are adjustable relatively to the position of they tool in such a manner. that morel or less of the weight of the frame andmotor may be imposed l'ipon'the tool. A

A further object of the invention is to provide a machine of. the class described with a wheel 'frame pivotally connected tofthepintor-supporting frame in such a manner that the wheel axle may be located.v

l3 3 Fig. 1 showing themeans b thereupon and provided with an extensionl enclosing a shaft driven by the motor and a tool-supporting head adjustably .mounted upon said extension in. such a manner that the tool may be employed vto surface the iioor or may be rigidly positioned to` i treat surfaces extending at an angle to said floor. f j

Otherobjects and features of the inven- -t1on will more fullya pear from the following descriptionan the accompanying drawings and will' be particularly pointed outy in the claims.

' In the drawings: Y

Fig. lis a side elevation, partially invertical longitudinal section, of `a surfacing machine embodying the present invention; l y f Fig. 2 is a lsectional View on line 2-2 Fig. 1, illustrating in full lines the toolsupporting head with the tool' restin upon the floor and the meansfor app ving force to the tool in the direction oits axis of rotation and also illustrating in Adotted lines 'an adjusted position of the ltooly for surfacing Va vertical wall and the means .by which force may. be applied to the tool when in this posit1on;'l

Fig. 3 is a detailsectio'nal view -on line which the tool shaft is shdably mounts in the driving gear inthe tool'head;

Fig..v .4 is an enlarged detail; elevationy of a portion of the tool shaft showing the means 'for preventing the shaft from loe coming detached from head.; and,

Figs. 5, 6 and 7 are .respectively detail viewsof other preferred forms of tools adapted to be employed in the surfacing the -tool-supporting machine for different kinds of work.

' The surfacing machine illustratedin the ac onlpanying drawings comprises a support. .ing frame having a base l upon which a suitable electri` motor-2 is mounted and a vertical standard 3 havin mounted thereupon a switch t for contro ling the matar also desirably having mounted thereupon a bracket which supports a liquid-containing tank 6. The front end of the frame also comprises a gear box 7 having a lateral eX- tension u on which a tool-supporting headis reifera ly adjustably mounted.

s illustrated herein the lower portion 7 of the gear box is integral with the base 1 of the platform and the upper portion of the gear box comprises a cover 8 which is bolted to the standard 3 of the frame. The lateral extension of the frame as illustrated herein comprises a cylindrical boss 9 in which is rigidly secured a tubular member 10 such as a pipe the outer end of which has rigidly secured to it a cylindricalsleeve 11 presenting a circular iange 12. Bushings 13 and 14 within the end portions of said pipe 10 provide bearings for a shaft 15 which is provided at one end with a gear 16 which is engaged by the pinion 17 of the motor shaft. The opposite end of the shaft 15 is provided with a beveled or mitre gear 18 for actuating the surfacing tool as will hereinafter more fully appear. A toolfsuppo-rting head 19, preferably in Vthe form of a rectangular or box-like casting, is adjustably secured to the flange 12 of/'the sleeve 11.

In the present construction the tool-sup porting head has a laterally extending rectangular boss 20 provided with a machined end and having a cylindrical aperture therethrough. The iange 12 is provided with a peripheral annular recess the wall 21 of whichextends into and fits within the cylindrical aperture in the boss 20. The toolsupporting head is clamped upon the flange 12 by a rectangular collar 22 which engages the opposite sides of. the flange and through. the corners of which collar bolts 23 extend into the boss 20of the head. Y

By reason of this construction the head 19 can be rotatably adjusted about the axis yof the shaft 15 to any desired' position and clamped in such position 'by` setting up the bolts 23. The head f19, is provided with another boss 24 which preferably extends at right angles to theboss2tl and is longitudinally bored to receivethe hub 25 of a mitre gear 26 which meshes with the vgear 18 upon t-he shaft 15, a suitable bushingfbeinginterposed between the gear hub ,and the wall of the boss 24. The sleevew27'desirably terminates at its lower end above the vlower end of the gear and a split ring- 28 seated in a groove in the hub at the end of the sleeve 4serves to prevent relative movement between the hub and the sleeve. A wear plate 29 desirably is interposed betweenthe under face of the gear and the shoulder upon the ioss 24. A tool-supporting` shaft 30 is slidably mounted in the hub 25 of the beveled gear, but is connected to the gear by one or more feathers 31 which desirably are formed integrally upon the shaft 30 and are slidably mounted in suitable slots milled into, the inner wall of the gear hub.

Means are `provided for preventing the tool shaft from being Withdrawn from the gear when in assembled position, the means illustrated comprising a spring ring 32 which is seated in arecess in the tool shaft 30 and which engages the upper face of the gear 26 upon downward relative longitudinal movement of the tool shaft. The lower end of the tool shaft'is connectedby a universal joint 33 tov a tool head 34 to which the surfacing tool 35 is detachably connected in the usual manner.V The tool-supporting head 19 is provided with av rectangular cap 36 having an upwardly extending cylindrical .barrel 37 WhichV is in axial'falinement with the boss 24 and is provided at its lower end with a bushing 38 to receive the upper end portion of the tool shaft. The upper end of the barrel k37 is closed and contains a helical spring 39 which at its upper end engages the under face of the head of the barrel and at its lower end engages a. sleeve 40 which acts upon an anti-friction bearing, such as a ball bearing 41 which engages the upper end of the tool shaft 30.

The helical spring, cushions the vibration of the grinding tool so that the operator may, without inconvenience from such vibration, apply to the tool the pressure required to produce the desired abrading or polishing effect.

In order to facilitate the operationof the tool means'are provided for supplying liquid from thetank 6 to the tool. As illustrated hereinjthenieans comprise a flexible pipe 42 wliiclr'isl, connected at its upper end to a. suitable`r faucet in'the tank and at its lower end to a head 4 3 upon a pipe 44 whichextends downwardly axially through the sleeve 40, the roller bearing 41, the tool shaft 30 and the universal connection 3 3 and delivers the liquid through a suitable.*aperture 45 iu the center of the tool 35.

One of the features of the invention consists in providing. means by which force may be conveniently manually applied to the tool in the direction vof the axis of rotation of thetool in any' of its. adjusted positions. The preferred ineansillusftrated in the accompanying drawings comprisesl a bracket 46which is iixedly secured to' the upwardly extending barrel 3'? of the tool headand ex- "tends laterallyl therefrom. rlhisbracket is ber, one army 48 oft whichA is longer than'the,

other arm 4S), 1 )esirably either end of the'. L-shaped handle 48 is made of suchsize as to lit the socket member 47, andadapfed to be claniped therein by a bolt 50 which engages the respective-'sections of the split socket. I Whenthe4 tool is lto be used .for surfacing ino a floor the longer arm 48 ofthe member is clamped in the socket member 47 thus enabling the pressure to be applied by the hand of the operator substantially directly above the axis o the tool shaft or in any positioii 'of adjustment of the handle about the axis of the'arm 48. When the tool is ad- `justed for surfacing a vertical wall or other Walls located in angular relation to the floor.

One of the principal features of the invention 'is to provide aportable surfacing machine in which the tool, although rotatably mounted in a `rigid support.upon the `frame, can be moved about universally so that any surface may be treated irrespective of its position. This is accomplished p' by pivotally mounting the supporting frame upon 'the axle of the wheel s'o that the entire frame is' capable of tilting movementl which 1 will permit the4 tool to be raised and lowered vertically. while the Wheels which engage the floor can be moved in any direction.

A furtherv object of the invention is to provide a wheelsupport for a surfacing machine of the character described in which.A

' the position of thel Wheels may be adjusted to impose more or less of the weight of the frame, motor and tool head upon the'tool.- This may be accomplished by providing means for adjusting the axle of the wheel relatively to the'supporting framein the direction of the extension 10 by which the tool-'supporting head is carried.

Another feature of theinvention consists inproviding a wheel support in which the axle'of the Wheels is located substantially in the plane of the center of gravity of the .machine so that in transporting the machine from place to place the tool can be readilyl raised vfrom. theoor and the machine drawn 4from one place to another without having 'the tool engagel the floor. These objects are accomplished by providing aY wheel frame which is pivotally mounted to the supporting frame in such a manner that'thewheel axle can be located substantiall in the plane of the center lof gravityr o thel ma-jA chine, or swung rearwardly from suchl plane into a position in which a large proportion of the weight of the machine willbe imposed upon 'the surfacing tool.l v. As illus-"` trated.- the wheel-supporting frame comprises a `bracket 5l at" one. end of which: is

mounted the axle 52 offa wheel or wheels 53. The bracket 51 is pivotally mounted upon ashaft or upon pivots 54 in bosses projecting downwardly' from the under face of the base l. The brackets 5l are pro-` vided with surfaces 56 and 57 disposed substantially at right angles to each other adapted to engage the under face of thc platform 1. The ax'is of the pivot 54 is so arranged with respect lto the basejvof the' machine that when the wheel '53 is in the` forward position illustratedy in lFigfl the axisof the axle 52 of the wheels 'willlbc approximately in the vertical plane of :the

fcenter of gravity, lout when ythe wheels 53 are moved'to the position illustrated in dotted linesin Fig. 1 the axis5'2 of the wheels n willbe' positioned at such distance fromthc [center of gravity that -a substantial portion of the weight ofthe machine will Vbe carried by the tool. p v' I Desirably a leg 58 is pivotally mounted in bosses 59`p'1'ojectin'gdownwardlyV from the rearend of the'ybase to provide a support for the machine when the same istilted upwardlywith-,the wheel 53 in the forward position illustratedl in full lines 4in` Fig; l. v

Thus when themachine isnot in use it will be yfirmly supportedwith ythe surfacing tool out of engagementwith the door.,

In Figs. 5,6 and 7 differentl forms of maisv are illustrated which may be substituted for the tool illustrated'in Fig. '1. In Figf a u small-#annular tool is' illustrated invertical section Apresenting a, `flat working surface. In Flg. 6 asimilar'tool is illustrated inverlllll tical section as providedv with a curved lower 4 fperipheral edg'ythis tool beingparticularly adapted forlinishing concavedly curved surfaces-such assanitary cove bases.' In Fig.

a vdiierent form of tool is illustrated hav`- lng a pluralityy of cylindrical abrading inem-- bers securedto a'ring which is adapted to be detachably -securedto the tool head 34.`

` It will be obvious thatlby reason of. theA construction hereinillustrated and described a surfacing ,machine fisV provided which is adapted to treat ythe surfaces along the bord-f ersfjpf lioors or walls vand whichcart'con-jl venfiently be adjusted' orthe treatment; f

surfaces disposed in angular relation'to *thel base or Walls. The machine desirablvybut notjnecessarily, is of a small sizeadapted to work upon borders of lioors or walls and uponstairtreads, steps, and other varieties .i126

of worlrflwhich heretofore havebeen incapable Tkof` beiniA surfaced by *il `PNV-er mutatedy machine. It Will however,V be'nbvious that the machine canv be made oflarg'e sizeand ,used for surfacingY floors and other Walls.

Within the scope'of the invention as defined by the claims. L

.It will be understood@ that the em'bodil"A i ment of the invention'particularlyj disclosed@ herein 4is of anillustrative character and is 'not'restrictive and that various changes in Jform, construction and arrangement ot parts may be made within the spirit and; scope of the Jfollowing claims.

Havingthus described tli'e`in\'ention,`\'vhat is claimed'as new, and .desired to befsecuie'd by Letters Patent, is:

l.- A poitablesurfacing machine comprising a frame having a lateral extension rigid- 1y connected thereto, va motor: 'mounted upon said frame, a tool-supporting!l head-imount-1; ed on said extension and rotarily adJustable about the longitudinal axis thereof, assur fac-ing tool having a' shaft rotatably vmounted in said head and means operable 'by said .-niotor for rotating vsaid tool.

2. A portable surfacin A. inachinecomprising a frame having a lateral extension,l a

motor mounted upon said frame, a tool supporting head adjustably mounted on said extension, a surfacing toolhavingl a shaft rotatably mounted in said'liead, means oper# able by said motor for rotating said tool,` a tool-controlling handle detaohably connectedv to -said head and means for selectively positioning said handle to permit ,pressure to be applied to said tool in the direction of' its axis of Yrotation at different. 'distances parallelism tothepivotal axis of said frame land means for limiting the respective movefrom its axis of rotation. i y

4. 'A portable surfacing machine comprisn ing a frame having a rigid lateral extension, a motorinounted upon said frame, a tubular tool-supporting head mounted on said extension and rotarily adjustable about the longitudinal axis thereof, a surfacing tool having a shaft rotatably mountedin said head, means operable b said motor for ro- *tating said tool, an L-s iaped handle having. arms or" different lengths-and means forv derV tacliably connecting either otl said arms tol said head in substantial parallelism tothe axis of said tool shaft whereby saidihandle may befcoiivenientlypositioned to apply pressure tosaid tool in the' direction ofits axis A.oi'frotation when the tool-supporting head is in different ositions' of adjustment.

5. A portablesur acing machine comprising a framehaving a rigid lateral extension,

a motor mounted upon said 4frame, a tubular' tool-supporting head: `mounted on vsaid extension and rotarily, adjustableabout the longitudinal axis of'said extension, al surfacing tool having a Shaft rotatably mounted in said head, means operable by said motor for rotating said tool, a Wheel frame pivotally mounted' on said supporting frame to swing j; about 'an axis extending at right angles to the direction in `which said extension projects t'rom said-frame, Wheels mounted upon said wheel 4frame and means for limiting the swinging movement of 'said brackets to change the position of the center of gravity :ofthe machine relatively to the tool.

6. A portable surfacing machine compris- 'inopfa vframe having a lateral extension, a

otor mounted upon 'said frame, a tool-supporting head mounted on said extension, a surfacing-tool having a shaft rotatably mounted in said head, nieans operable by said motor for rotating said tool, a Wheel traine pivotally connected to said supporting frame to swing about an axis so located that when in one position the Wheel axle'will l-ie in approximately the vertical plane otl the center of gravity of the .machine at right angles to the-direction of siiid'extension and -a pair .of Wheels mounted Vii'pon said Wheel axle to rotateabout an axis parallel to the axis of its pivotal vconnection to said motorsi'ippoiting frame and means for limiting the respective movements of said Wheel .traine about its axis iii either direction.

7. A .grinding machine comprising a iraine,fa motor mounted upon said frame, a grinding tool having a vertical shaft and means operable by said motor for rotating Said grinding tool` a wheel frame pivotally connected to said niotor-supporting frame yto swing about an axis so located that when lin-oneposition the wheel axle `will lie in approximately the vertical plane of the center of gravity of the machine, Wheels mounted on said Wheel axle lto rotate about an axis in said bearings, means for actuating said shaft fro said "motor, a tool-supporting head, means-for adjustably clamping said head uponzsaid flanged end to permit rotary ad@ justme'nt about the axis of said shaft, a surfacing tool havinga shaft rotatably mountlio edin said head andmeans for rotating said tool shaft from the shaft mountedv infsaid extension. 5:57, A

9. A portable suriacing machine compris ing a'supporting fra-mea motor mounted, upon said frame,l a lateral extension trom said framerigidly connected thereto and having bearings therein and rovided with a flan ed end, a shaft rotatab y mounted in saidv -cari-rigs, -means for actuating said -ed upon said frame, a lateral extension from said frame rigidly connected thereto( and having bearingsl therein and 'provided with a flanged end, a shaft rotatably mounted in said bearings, means for actuating said shaft from said motor, a tool-supporting head, means for adjustably clamping said head upon said flanged end to permit adjust# ment thereof about theaxis of the shaft in said extension, complementary beveled gears mounted respectively upon said shaft andin said head, a tool shaft slidably connected to the gear in said tool-supporting head and rotatablethereby, a surfacing tool universally connected to the end of said tool shaft and resilient means acting upon the oppof' site end of said tool shaft'.

11. A portable surfacing 4machine comprising a supporting frame, amotor mounted upon said frame, a lateral extension from said frame rigidly connected thereto and having bearings therein and provided with a flanged end, a shaft rotatably mounted in said bearings, means for actuating said shaft from said motor, a hollow tool-supporting head, means for adjustablyclamping said head upon said flanged end'to permit adjustment thereof about the axis of the shaft in said extens1on, complementary beveled gears mounted respectively .upon said shaft and'in said head, a tool shaft slidably connected tothe gear in Asaid tool-supporting head and rotatable thereby, a surfacing tool universally connected tov the end of said tool shaft, resilient means acting upon the opposite lend of said tool shaft and means connected to said shafty within said head for preventing the tool shaft from becoming detached from said head.

l2. A portable surfacing machine comprising a supporting frame, a motor mounted upon said frame, a lateral extension from said frame rigidly connected thereto and having bearings therein and provided with a flanged end, a shaft rotatably mounted in saidbearings, means for actuating vsaid shaft from said motor, a tool-supporting head, means for adjustably clamping said head upon said flanged end to permit adjustment thereof about the axis of the shaft in said extension, complementary beveled gears mounted respectively upon said shaft and in said head, a tool shaft slidably connected to the gear in said tool-supporting head and rotatable thereby, a surfacing'tool universally connected to the end of said tool shaft, a liquid-containing tank mounted 1,upon said motor-supporting frame and means for conducting liquid therefrom.

through said tool shaft and tool. In testimony whereof, I have name to this specification.

ERCOLE oaviooHI.

signed my,