US1556374A - Grinding apparatus - Google Patents

Description

'E. E. THOMAS GRINDING APPARATUS Filed April 19 192.4 3 sheets-sheet 1' IN VEN TOR.

77am s A TTORNEY.

E. E. THOMAS GRINDING APPARATUS Filed April 19. 1924 3 Sheets-Sheet 2 INVENToR.

Il? mamas ,0a. 6,1925- v l E. "E. THOMAS GRINDING APPARATUS Filed vApu-:L1 19. 1924 3 Sheets-Sheet :5

INVENTOR.

ATTORNEY.

i 1 citizen of the United-States,y residing at` Patented Oct. 6, 1,925.

ELMER E. THoivIae, oFrHAR'DIN, ILLINOIS.

PATENT oei-ica sminuire APrAnArUs.: .1.

Alipiication ied April i9, 1924. Seriai no; #073677.' Y

e To all 'wh-omit may concern."

Be it kno-wn that I, ELMER E. THOMAS, a

Hardin, in the county of Calhoun and State of Illinois, have invented certain new and useful Improvements iny Grinding Apparatus,'of which the following is a specification,

`r`eferencefbeing had to the accompanying drawings. v s

This invention relates to certain improvements Vin grinding apparatus and has relation more particularly to a devicev of this general character especially Vdesigned and adapted forv use in? connection `with the grinding out of cylinders and kindred iiiternal work and it is an object of the inventionto provide afdevice ofthis kind having novel and improved means' whereby the grinding or workingeleirient can bepositioiied or adjusted with respect tothe work asl the requirements of practice may necessitate. l l i Furthermore it is an object of the invention to provide a device of' this general character comprising alr drum adapted to be snugly engaged wit-hin 'the boreof a casting orltlie like to be ground. said drum having f arranged therein a grinding element adapt-- ed to be suitablyprojeeted through an opening formed in a wall of Athevdrum to engagev the surface vto be operated upon together with means operable exteriorly of thefdrum foi' adjusting said grinding `element as required.'V l t The invention consists inthe details of construction and in the combinationand ar-, rangement of the several parts of my iinproved grinding apparatusrwhereby certain important advantages are attained and the device rendered simpler, less expensive andy otherwise more convenient and advantageous for use, as will be hereinafter more fully hereinafter be definitelyfvelaimed. E

In order that my invention may be'v'the better understood, Iwill now proceed to describe the same with reference to the ac companying drawings, wherein :-'4 y e Figure l is a view in'elevationvillustrating a 'grinding apparatus constructed in accordancewithan embodiment of my invention;

vFigure 2 is an enlarged fragmentary view in elevation of-'the meansas herein disclosed for adjusting the grinding element toward or from its work and for rnovingsaid element .along they work; e,

Y Figure Bisga `fragmentary,view partly in section and partly in elevation illustrating details of constructionl as comprised in Figure 2; Y i

Figure 4 is an enlarged fragmentary vertical sectional view with parts in top plan of the drum and the parts immediately associatedtlierewith; f Y

Figure 5 vis a viewV partly in section and partly in plan of the structure shown in Figure 4, the line offsection being 'substantially at right angles to that of the line of section in Figure 4;

ing in the direction of the arrow;`

Figure 7 is an enlarged fragmentary view partly in section and partly` in elevation for the apparatus as herein set forth;`

Figure 8 isa view in end elevation of the structure `as illustratedl in Figure'? Figure 9 is a jsectional View taken substantially on the line 9 9 of Figure 7 Figure 10 is a sectional view taken substantially on'the line l0-10 vof Figure As disclosed in the accompanying drawings, 1 denotesa supporting member or base of desired configuration and 4which is provided at predetermined points spaced longitudinally thereof with the upstanding posts 2 and 3 provided at, their tops with the bear ings l,4 and 5 respectively..

Rotatablysupported by the bea-ring Liis an d elongated tubular member 6,'said member 6 being free to rotate and also' freev to have lengthwise `movement ,through the vbearingr Villustratingin detail the A"driving mediums 4. f The inner end portion of the member 6 ,l

is reeeivedwithin a split collar 7 carried-by j the `head 8 of the drum D, said collar'7 being adapted to be clamped to the member 6, in a well-known manner by a coacting nut and bolt as indicated at9.` By this meansl theinnerend portion of the. member 6 and the head 8 are effectively locked one vto the.

other vfor unitary movement. VVClai'nped to the outer end A portion ofi-the; member''is a split sleeve 1-1 "constituting a ies hub for the end wheel 12, the purpose of which being hereinafter more particularly referred to.

Rotatably supported by the bearing 5 is an elongated tubular member 14 also being freely movable longitudinally through said bearing and the inner end portion of the member 14 is clamped within the split collar 15 carried by the second head 16 of the drum D, said collar 15 being held in a conventional way in clamping engagement with the member 14 through the coacting bolt and nut 17 whereby the headL 16 and the member 14 are united for unitary movement.

Each of the heads 8 and 16 partially telescope within the cylindrical wall 18 of the drum `and is held in applied position through the medium of the threaded members 19, the outer end portions of which being flush with the peripheral face of the wall 18. The drum D is of a diameter to substantially snugly engage within the bore of the casing` to be worked and the wall 18 at substantially its longitudinal center is provided with an elongated opening 20 tin-ough which is adapted to be projected as desired the grinding element or disc 21. The disc 21 partially extends within the kerf 22 provided in the outer end portion of an arm 23. said disc being fixed to a shaft 24 rotatably supported by said arm 23. The opposite end portion of the arm 23 extends between two longitudinally spaced internal fianges 25 carried by the wall 18 and is supported for pivotal movement by the pin 26 held by said Hanges 25 and disposed. through the arm 23. Disposed between the flanges 25 and thearm 23 are the retractile springs 27 which serve to move the arm 23 in a direction to urge the grinding element or discI 21 inwardly through the opening 2() away from the work yet permitting said element or disc 21 to have outward movement as the necessities of practice may necessitate.

The opposite end portions of the member 14 have fixed therein. the bushings 27 which provide mountings for the tubular shaft 28 er-rgtending through the member 14. the inner end portion of which being received within the opening 29 provided in the axial center of the head 16. The bore 30 of the shaft 28 is angular in cross section and fitted within the inner end portion of the bore 30 of said shaft 28 is a block 31 operatively connected with an end portion of the shaft 24 through the medium of the universal connection 32 whereby upon rotation of the shaft 28 desired rotary movement is imparted to the grinding element or disc 21.

Extending upwardly froln the base member 1 outwardly of the post 3 is a pedestal 33 provided at its upper end portion with the spaced bearings 34 providing a mounting for the sleeve 35 the bore 36 of which being angular in cross section. Mounted upon the sleeve 35 intermediate the bearings 34 is a pulley 3.7, said pulley being keyed, as at 38, or otherwise held to the sleeve 35 for unitary rotation therewith. The pulley 37 is adapted to be driven by a belt leading from a suitable source of power. Snugly fitting within the bore 36 of the sleeve 35 is an end portion of a shaft 39, the same being held against endwise movement with respect to the sleeve 35 by the binding screw 4() or the like. rThe shaft 3f) is of desired length and is telescopically engaged within the bore 30 of the shaft 28 hereinbefore referred to whereby said shaft 28 is driven from the shaft 39 vet permitting the shaft 28 to be moved lengthwise relative to the shaft 39.

Engaged within the opposite end portions of the member 6 are the bushings 41 providing bearings for the shaft 42 extending through the member 6 and within the drum D through a central opening 43 provided in the head 8. The inserted end portion of the shaft 42 is provided with a crank arm 44 of desired length but provided at its free end portion with a lateral extension or pin 45 overlying the arm 23 and contacting therewith. Upon requisite rocking movement being imparted to the shaft 42 the grinding element or disc 21 may be projected or retracted with respect to the periphery of the drum D as the requirements of practice may desire.

The outer end portion of the shaft 42 extends beyond the outer end of the member 6 and fixed to said outer end portion is a rock arm 46 having its outer end portion bifurcated. Fitting within the kerf 47 provided by such bifurcation is a block 48 supported for swinging movement by the pin 4S) disposed through the block 48 and the arm 46. Threaded through the blocl 48 is shank 50 of desired length. the outer end portion of which being freely disposed through a sleeve 51 and` provided beyond the sleeve 51 with an operating wheel 52. The shank 50 is held against lengthwise movement with respect to the sleeve 51 through the medium of the nuts 53 engaged with said shank adjacent the opposite ends of the sleeve 51. The sleeve 51 has a swivel connection 54, as indicated by broken lines in Figure 2, with a spoke 55 comprised in the wheel structure 12. By requisite turning of the shank 50 through the medium of the wheel 52, the arm 46 will be roc'lted as desired to effect the requisite projection or retraction of the grinding element or disc 21.

In practice, the casting to be internally ground is suitably supported within a holder generally indicated at H in Figure 1, said holder being preferably of a character whereby the casting may be properly adjusted to effect the desired centering. The holding means H forms no particular part of the presentinventionrandkit is believedy p that a detailed illustrationiandkdescriptionA thereof is unnecessary.

Before the casting is applied to the holder H, the head 8 is disconnected from'fthe wall 18 and the member '6 moved outwardlyV a distance sufficient -to position said head 8 beyond the outer end of the holder H. It being also understood that the `member 14: hasl been moved outwardly sufficient to position the 'drum D beyond the opposite end of the holder H, as illustrated in Figure 1. After the casting has been applied tothe holder H the head 8 together with the membert) may be moved inwardly and through the bore of the'casting after whichfsaid head 8 is again operatively connected with the drum D. The member 6 and drum D are shen moved in a direction to engage the drum D within the bore of the casting and after properly arranged therein, the wheel 52 is operated to bring the element or disc 21 into proper contact with the wall of the bore of the casting. Y The shaft 28 is then rotated through'the instrumentality of the shaft 39 to effect the desired operation of the element or disc 21. By imposing proper stress or strain upon the member 6 preferably through the medium ofthe wheel 12, the element or disc 21 may be caused to operate upon the wall of the borey of the l casting at any point therealong and by rotating the member 6, also through the medium of the wheel 12, the element or disc 21 may be brought into contact with the wall of thebore of the casting at any point therearound. It is also to be particularly noted that the desired adjustment of the element or disc 21 through the medium of the shaft 42 may be effected during the periodvsaid element or disc is in rotation.

From the foregoing description it is thought to be obvious that a grinding apparatus constructed in accordance with my invention is particularly well 4adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will alsobe obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

1. An apparatus of the class described comprising a drum, provided with heads. one of said heads being removable, said drum being provided in its peripheral Awall f with an opening, tubular members supported for endwise movement, and rotatable movement, means for securing each of sald members and a head of the drum, a grinding and supported" for movement with respect tothe peripheral wall of the .drum,'means extending through one of the tubular members' for regulatingsuch movementlof'the grinding element with respect to the peripheral wall of the drum, andmeans disposed' through thesecond tubular member and coacting with the grinding element for rotating the same.

2. An apparatus of the class described comprising a drum provided with an opening inV a wall thereof, tubular members engaged with theopposite ends of the drum,

means coacting with said members for sup-V porting the same for both rotary movement and endwse movement, a grinding element within thel drum and adapted to project through the opening in the wall of the drum, means extending through one of the tubular members and operatively engaged with 'the grinding element for rotating the same, means engaged with'the second tubular member for manually rotating the drum, and means extending through the second tubular member and coacting with the grinding element to effect a projection or retraction thereof with respect to the peripheral wall of the drum.

3. An apparatus of thev class described comprising a drumV provided with an opening in a wall thereof, an arm mounted within the drum for swinging movement, a grinding disc rotatably supported by the arm and adapted to project through theopening in the drum, a tubular member connected to the drum, a rod disposed through said tubular member and extending Within the drum, the inserted end portion of the rod having a rock arm coacting with the swinging arm carrying the grinding disc to impart swinging movement to said first named arm, and means for rotating the rod.

4. An apparatus of the class described comprising a drum provided with an opening in a wall thereof, ank arm mounted withyin the drum 'for swinging movement, a grinding disc rotatably supported by the arm and adapted to project through the opening in the drum, a tubular member connected to the drum, a rod disposed through said tubular member and extending within the drum, the inserted 'end portion of the rod having a rock arm coacting with the swingthe drum, a rod disposed through said tuhu'- of the od, alud means ooae'ting with said lar memherV and extending Within the drum, rook arm to lmpait rocking movement to the inserted end portion of thefi'od having the rod. 10.

a rook arm coasting with the Swinging arm In testimony whereof I hereunto my l carrying the giinding dise to impart swlngsignature.

mg movement to saidrfii'st named arm, a v rook arm Carried by the outer end portiozi ELMER E. THOMAS.

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