US1583146A - Dressing tool for abrading stones - Google Patents

Description

May 4 1926. 1,583,146

H. c. HEON DRESSING TOOL FOR ABRADI'NG STONES .File ay 18. 1925 2 Sheets'-Sheet 1 C /1 5 KII x/j & A 5

Patented May 4, 1926.

unites STATES PATENT?orri'ca HORACE o. resort, on onronoo, rLLINoIs, ASSIGNGR' 'ro AuroMofeIvn MAINTENANCE MACHINERY 00., or CHICAGO, ILLINoIs, A CORPORATION ol -ILLINOIS.

DRESSING- TOOL FOR ABRADING STONES.

Application filed May s, 1925. Serial No. 30,943.

To all whom may concern:

Be it known that I, I-Ionncn C. HnoN, a subject of the King of Great Britain, residing at Chicago, in the county of Cook'and State of Illinois, have invented certain new and useful Improvements in Dressing Tools for Abrading Stones of which the following is a specification.

My invention relates to means for dressing in the active surfaces of abra-ding stones, and

more particularly to a hand tool for dressing the abrasive elements of cylinder-grinding tools. Cylinder-grinders are known, and in general commercial use, wherein a phi-- l rality of relatively long and slender abrath ing elements or stones are respectively mounted Cl1I1lQl i'l18lRbGlfS which are so associated with the rotatable body member that, in operation, the several stones will act equally upon and grind the inner surface of an engine cylinder or the like; and the cf- .ficacy o'fsuch a grinding tool, for protracted use, depends largely on keeping the several stones properly dressed at their working surfaces, in order that all of said stones may protrude equally from their carriers and that each of said surfaces may be true, straight and non-tapering inshape and may present a clean, sharp, abrading condi- Among the objects of my invention are,

to provide a hand tool for the stated dressing of the abra'ding elements of such a cylin der grinder, which will be simple in construction, rapid and accurate in its operationeven in inexpert hands, easy to adjust and operate, and inexpensive to maintain in good operative condition. And to attain these and further objects, which will become apparent to those skilled in the art from the following description taken with the accompanying drawings, my. invention consists in the combina' ion of parts and features f construc tion hereinafter described and claimed.

In'the draWingaFigure 1 is a side elevation of a portion of a cylinder grinder equipped with an abrading element such as the dressing-tool is to sharpen and true up; Fig. 2 is a side elevation of the dress1ng-tool in working position with respect to the' abrading stone and thecarrier for the latter: Fig. Sis a cross-section on line 88 of Fig. 2; Fig. 4 is a perspective detail of an element of the'dressi'ng membershown in Fig; 3'; Fig.5 is a perspective-detail of the adjustable bearing block or carrier memher for said dressing element; Fig. 6 is an edge elevation ofv the dressing-tool, from its working edgeyFig. 7 is a central longitudinal-section on line 77 of Fig. 6 Fig. 8 is aside elevation of a fragment of a modi fied construction; andFig. 9 isan edge elevation, from theworking ec'lge, of the structure shown in Fig. 8. r

In the-drawings a indicates a relatively long, slender abrading stone, Qfcarbo rundum or other suitable material, usually of approximately square cross-section, the outwardly presented portion a whereof is the working surface or abrading face and the inner portion of which is invested, at V the bottom and sides, in a channel-shaped sheet-metal holder 6', reinforcingandprotect ingthe part of'the stone which it en'ibraces- Each such stone and its holder ismount-:. ed in a carrier member 0 ofwhich a plurality are provided, these being suitably mounted on a rotatable body d so that when the body is rotated the several stones may work against the inner surface of a engine cylinder or the like. In the par ticular construction typically shown: the stone-carrier c is pivoted as at e to the tool body and ispressedoutwardy by a spring In order to be best conditioned for grinding a true cylindrical" surface each stone a, should be dressed, at its outer or workingsurface a". so that said surface will have its edges longitudinally parallel'to the longitudinally straight, outwardly presented surhe faces 0 and 0 of' the carrier 0, and also the crystalline structure of the working surface a of the'stone should be sharp and notloaded with previously-collected metal. Also the surface a should have its working as face dressed to stand either at right angle or oblique angle to the side faces of the stone in such degree as will best fitthe working face of the stone to the inner surface of the cylinder to be ground, according to the loo diameter of thecylinder and the consequent pivotal throw of the stone-carriers c.

The dressing-tool shown in Figs. 2 to 7 inclusive provides a body 10 which, in best practice, is considerably longer than the abrading stone to be dressed and the carrier c therefor, being preferably about twice as long as th stone-equipped carrienand is of width, at its working edge, substantially-wider than is'the'stonelto be dressed, L10

so as to afford guide-surfaces Hand 12 which mayeoact with the surfaces and c of the stone-carrier 0. Between the surfaces 11 and 12 the body is longitudinally channeled as 13 to a depth greater than the maximum protrusion of the stone from the stone-carrier, the channel-width being preferably only slightly greater than the width of the stone; and while the width of the surfaces 11 and 12 (and consequently extent of their bearing-contact on the stone-carrier) may be varied, it is preferable that their transverse or cross-sectional contours shall correspond quite accurately with the contours of surfaces 0 and c of the stonecarrier. Also, where the stone is disposed in a holder Z) which protrudes atits edges somewhat beyond the surfaces 0 and/or 0 of the stone-carrier, recesses as shown at i l and 15 are preferably made in the edge of the dressing-tool body, flanking the stonereceptive channel 13, so that the protruding portions of said holder Z) may serve as iateral guides, and take the wear, when the dres ing-tool body is being reciprocated longitudinally along the stone-carrier.

The depth of the dressing-tool body need not be great throughout the longitudinal end portions thereof, but at the center of its length I preferably provide a rather deep or tall extension 17 which serves both as a convenient handle and as an extension frame to receive the bearing-block to be described. Although the contour of such handle part may be widely varied, it may best be of such longitudinal extent, depth, and top curvature that it may easily be firmly grasped between the heel of the hand and the finger for forceful manipulation of the tool.

In the preferred form of construction a guide-way 18 is formed in the body as a straight-sided recess opening toward the working face of the body, extending well into the depth of the extension 17, and open also at both side faces of the body and extension. In this guide recess is arranged the adjustable bearing member for the dressing roll, such member 19 taking the form of a block making a neat fit in the guideway, said block having two arms 20 laterally separated to accommodate between them the dressing roll 21 and being also apertured as at 22 to afford bearing for the dressing-roll arbor 23.

The main dressing-element 21 is preferably of substantially greater width than the width of the stone, and presents peripherally a series of points or teeth adapted to clean ant, sharpen the stone with a crushing action. Specifically I prefer that the element be made up of a series of toothed lamina or relatively thin rings 21, arranged side by side substantially to fill the space between the arms 202O of the bearing block 19, but

each free to rotate upon'the arbor 23, so

that the crushing-tooth pattern changes during operation as the individual discs may firmly be held in any adjusted position. To

these ends set screws 26 and 2?, adjustable hrough the top of the extension 17, bear upon the top of the block 19 near opposite side edges thereof, while set screw 28 worriing through one end face ofthe extension 17 engages in a recess 29 in the proximate face of the bearing bloclr 19 and clamps the block against lateral displaceme-nt. E i hen set screw 28 is loosened the bloc may be angularly turned or vertically or laterally moved through quite a range of displacement-s, but the recess 29 being closed at its top, the block may not fall out. As indicated in 8 by the solid line and dotted line positions of the bearing block 19 a corner of the stone or the entire surface of the stone may be dressed to various angular positions. Each of the set screws shown has its outer end socketed for reception of a suitable socket wrench.

Operation of the stone dressing-tool requires no particular training or skill. To merely clean and sharpen the stones of a grinding tool, the bearing bloclr19 is adjusted so that when the dressing roller bears upon the surface a of the stone the guide- surfaces 11 and 12 of the tool are slightly spaced away from the surfaces 0 and c of the stone carrien, Under quite heavy manual pressure the tool is run back ward and forward, crushing the surface a of the stone into sharpness and cleanliness, until both surfaces 11 and 12 of the tool are sliding upon the corresponding metal surfaces of the carrier for the stone, substantial side play being prevented by the guidance of the tool-recesses let and 15'upon the sides of the stone-holder Z). For dressing a tapered stone (i. e., higher at one end than at the other) to remove the taper, the dressing roller is adjusted for a mere cleaning operation at the low end of the stone and will be worked until the high end is worn down. For dressing the stone to a new angle of presentation, angular adjustment of the roller may be had as suggested in Fig. 3; It will be observed that by the provision of a long body, having substantially full length bearing on the stonecarrier as long as the dressing roller is in the contact with any portion of the stone, and making the body of considerable width and with ample bearing surfaces for coaction with the stone -carrier on opposite. sides of the stone, it is substantially insured that when the work is finished to the point Where the stone-carrier and tool-body make sliding engagement with their metal surfaces fully in-contact, the stone will show uniform dressing of all portions that have been in reach of the dressing roller.

For some characters of stone it is desirable that the dressing be more or less done by a scraping form of tool rather than a crushing form, and as shown in Figs'S and 9, a deep recess 31 may be formed in the working edge of the tool body opening to that edge and to the side faces of the body, and extending diagonally from side face .to side face, as best shown in Fig. 9, preferably at an angle of degrees to the longitudinal line of the channel 13, In this channel is disposed a scraping blade 32 toothed at its working surface, and preferably made of laminae, each serrated at its Working edge,

withthe pack of blades substantially filling the channel 31 and clamped laterally therein by set screws 33 and 34 entering from opposite side faces of the body, the vertical position of'the pack within the recess 33 being determined by adjustment of the set screws 36 and 37 entering the recess through the top or back of the body. Manifestly, with such construction either the roll or the blades may be used alone, by adjustment of the other to non-functioning position or' by removal or omission of the other.

While I have herein described in some detail particular embodiments of my inven- 1 tion for ourooses of full disclosure it will tit] be understood by those skilled in the art that numerous changes in detail of construction and arrangement of parts may be made without departure from the spirit of my invention, within the scope of the appended claims.

I claim:

1. A stone-dressing tool comprising, in combination, a body-member having a stonereceptive channel in one edge and guiding surfaces flanking said channel and adapted to coact with and be guided by the stonecarrier, astone-dressing element extending across the width of said channel and adjustable in the direction of depth of sa1dchannel to vary its effective distance from said guidesurfaces, and adjusting means for determining the adjusted position of said dressing element.

2.111 a tool for dressing the abrasive stones of cylinder grinders, a body member having longitudinally extensive guide surfaces at one edge thereof for sliding coaction with the abrasive-stone carrier and having a stone-receptive recess in said edge; a st0ne-dressing element crossing said channel adjacent the longitudinal center 01 the body and adjustable to vary its distance from the guiding surfaces of the body, and

s lil at different distances bacl:

means for fixingsaid dressing element in dnterent'ad usted positions.

3. In a hand-tool for dressing the abrading stones of cylinder-grinders and the like,

the combination of a bodyadaptedfor guidcooperation with the stone-carrier and having atone edge a stone-receptive channel flanked by longitudinally extensive, guiding edge-surfaces; a stone-dressing element extending across said channel at the longitudinal mid-portion of the body and adjustable to vary its distance from and its an-] 'gular relation to said guldlng edge-surfaces, and. means for fixedly holdingisaid. element many said position of adjustment.

i. A structure as set, forth in claim wherein said body is provided with a crossslot to receive said dressing-element and said adjustment determining means comprise set screw elements entering said slot from the in its working edge a: stonereceptive channel' flanked by longitudinally extensive guide-surfaces adapted to coact with sur faces of the stonecarr ier, a lateral extension from said body adjacent the middle of its length, shaped for hand grip; said body having a transverse recess crossing said stone-receptive channel and entering said extension; 21 bearing-member movably arranged in .said recess; toothed dressing roller mounted in said bearing member to extend into and across said stone-receptive channel, and adjustable means for positioning said bearing member from the guiding edge-surfaces of the body.

6. In a hand-toolfor dressing the abrasive stones of cylinder grinders and the like, the combination of a body-member having in its working edge a stone-receptive chana cylindrical,

ill)

nel flanked by longitudinally extensive guide-surfaces adapted to coact with surfaces of the stone-carrier, a lateral extension from said body adjacent the middle of its length, shaped for hand grip; said body having a transverse recess crossing said stone-receptive, channel and entering said extension; a bearing-member movably arranged in said recess; a cylindrical, toothed dressing roller mounted in said bearing member to extend into and across said stone-receptive channel, adjustable means for positioning said bearing member at differentdistances back from the guiding edge-surfaces of the body, and With'the dressing roller in different angular positions with respect to said guiding surfaces.

7. in a hand-tool for dressing the abrasive stones of cylinder grinders and the like, the combination of a body-member having in its working edge a stone-receptive channel flanked by longitudinally extensive gnidc-snrii'aces adapted to coact With surfaces of the stone-carrier, a lateral extension from said body adjacent the middle 01 its length, shaped for hand grip; said body having a transverse recess crossing said stone-receptive channel and entering said extension; a bearing-member movably arranged in said recess; yiindrical, toothed dressing roller mounted in said bearing member to extend into and across said stonereceptive channel, adjustable means for positioning said bearing member at difi'er at distances back from the guiding edge-surfaces of the body, and With the dressing roller in ditterent angular positions with respect to said guiding surfaces, said adjusting means comprising two setscrews bearing on the. back of the bearing-member adjacent the side surfaces thereof.

8.111 a dressing-tool for. the abrasive stones of cylinder grinders and the like, a body member having; a stone-receptive channelin one edge, flanked by edge guide surfaces adapted for coaction with the stone-carrier, and a stone-dressing element arranged transyersely of said channel and n'esentin its workin J-ortion Within the depth or said channel, said dressing element comprising a crushing-cylinder having peripheral teeth and rotatable as the tool is moved along the stone. 7

9.111 a dressing-tool for the abrasive stones or" cylinder grinders and the like, a body member having a stone-receptive channel in one edge, flanked by edge guide-surfaces adapted for coaction with the stonecarrier, and a stone-dressing element arranged transversely of said channel and presenting its Working portion Within the depth or: said channel, said dressing element comprising a crushing-cylinder having pe- *ipheral teeth and rotatable as the tool is no d along the stone, said cylinder compr a plurality oltoothed discs rotatableindependently of each other.

10 in a hand-tool for dressing the abrading stones oicylinder grinders and the like, the combination of a body member having in one edge stone-receptive channel and at such edge providing iongitudinallycntensive guide-surfaces flanking said channcl, said body havin adjacent its mid-por-o degth oi said channel.

11. 111 hand-tool for dressing the abrading stones oi: cylinder grinders and the like, the combination of a body member having in one edge a stone-receptive channel and at such edge providing longitudinally-extensive guide-surfaces flanking said channel, said body having tion a recess crossing said channel; a bearing member arranged in said recess and movable therein to vary its angular relation to and its distance from said guidesun faces, means for positioning said bearing member fixedly in said body in any adjusted relation aforesaid; and a stone-crushing dressing-roll carried by said bearing memher and presenting the Working portion of its periphery transversely to and Within the depth of said channel, said roll member" comprising an arbor mounted in said hearing member and a plurality of toothed rings arranged side by side and independently rotatable upon said arbor.

HORACE C. HEON.

adjacent its mid-oor-

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