US1692661A - Combined abrasive and carrier - Google Patents

Description

Nov. 20, 1928.

M. C. HUTTO COMBINED ABRASIVE AND CARRIER Filed Dec. ll, 1926 l 'I fl" NVENToR. M'mfpf/v C- #afro m CML ATTORNEY.

Patented Nov. zo, 192s. 1,692,661

' UNITED STAT-ES PATENT OFFICE MABSDEN C. HUTTO, F DETROIT, MICHIGAN.

COMBINED ABRASIVE AND CARRIER.

Application led December 11, 1926 Serial No. 154,28.

This invention relates to abrasive holders as shown, shall be of a certain length rela- 55 for cylinder grinders and is a continuation tive to the grinding face of the stone. Thus in part of my application Serial No. 661,- the method of manufacture of the abrasive 883, filed September l0, 1923. and its holder as hereinafter described seeks More particularly the invention is a comprimarily to insure accuracy in the mountbined abrasive and holder, the fundamental ing of the stone so that the face which lies 0 characteristics of which are described in the longitudinally of the tool shall normally be said previous application and an improved strictly parallel with the axis thereof. form of which is disclosed herein. Stones used in cylinder grinders or lap- The object of the invention is to provide ping devices are usually made of compacted a combined holder and abrasive in which granular material such as carborundum or 65 the abrasive member, usually Vin the form of like abrasive and subsequently fired. Such a natural or artificial stone is supported in stones usually vary in thickness throughout a channeled member having associated theretheir length and therefore require dressing with members engaged by the adjusting after the stone has been mounted in its means of the tool of which it forms a part holder. i so that the grinding face of the abrasive is A feature of this invention is in promounted in the tool in a precise relationviding a holder and a method of mounting ship with the adjusting device. In the tool the stone therein which insures parallelism with which the combined abrasive and holder 0f the grinding face of the stone with the is used as shown in the said original apaxis of the tool in which it is to be used plication Serial No, 661,883 and as is shown irrespective of variations in thickness of the Vherein several abrasive members are mounted stone. Thus, the surface of the stone is norin a head intended to be reciproeated and `mally exactly parallel with the axis of ro- 25 rotated in the cylindrical aperture to be ttiOn 0f the grinding dome.

ground, and a. feature of this invention re- An object of this invention therefore is to Bil lates more particularly t0 the holder of provide a holder and a stone in which the channel like form in which the stone is Seolder and the stone are held in the desired cured by a self-hardening materialthat is, final relationship and a self-hardening maflowed to place in a more or less liquid ferm, terial flowed between the members whereby This material may be solder or lead 0r even a they automatically become fixed in the necese5 varnish or shellac and, while the stone and sary relationship and the finishing ofthestone `holder are held in the relative final posil1bSeq11ent t0 mounting is dispensed With tions, the material for securing the stone lnsmuch as major inaccuracies are compenin AAplace is supplied thereto. sated for by the self-hardening material.

further feature of the invention is in These objects and the several novel feauo the provision of a holder of sheet metal tllleS 0f the iIlVBnfiOn are hereinafter mre ,form with which the portions thereof fully described and claimed, and the-preadapted for engagement, with the adjustferred form of an abrasive and.its carrier 40 ing device of the tool are riveted in place 91' hOlder mbdyillg my iIlVeIliSiOn iS ShQWIl and the stone mounted therein by a solder 1n the accompanying drawings in which- 05 or suitable material in which the stone is Fig- 1 iS lOllgitudinal Section 0f a tOOl floatedlvor owed in its final relationship ShOWlng my im roved abrasive and its with the holder and thus fixed in predeterhOlder mounted t cren. 45 mined position as the material hardens. Fig. 2 is a perspective view of the As is hereinafter more fully described I finished holder. preferably utilize a pair of pins each .ad- Fig. 3 is a cross section taken on line 3--3 jacent an end` of the holder which when in 0f Fig. 2. the tool fit against opposing coned members Fig 4 is a cross section of the holder and Mi that are adjustable toward or from each other the stone indicating the method of securing and 'iny order that all the holders and the the Stone in place therein. los

faces of all the abrasives shall lie in the Figs. 5 and 6 are vertical longitudinal same circle, 4it is essential that these cone sections, on a reduced scale, taken on the contacting portions, which may be the pins correspondingly numbered lines 1n Fig. 2,

the self hardening material being shown between the supporting base and the stone corresponding to Fig. 3.

In my previous application Serial No. 661,883 above mentioned I have shown a similar holder in which the stone is held in place by means of lead. In the invention there disclosed and herein further described the holder consists of a sup orting base hav'- in preferably the form of) a shell or channe ed member 1 which as here shown is referably made of sheet metal formed in a die and may be provided with an extending lip or lug 2 at opposite ends thereof. This shell or channeled member 1 preferably has a shape in cross section as shown more particularly in Fig. 3 and adjacent each end thereof is provided parallel pins 3 and 4 of like form projecting transversely from the bottom 1 of the holder and at right angles thereto. These pins extend through apertures provided therefor in the body 5 of the tool kto en age the res ective cone members 6 and 7, the ends of tlie pins being tapered as at 8 to provide line contact with the respective cone member. As described in the said previous ap lication these cones may be adjusted as to istance apart through the central adjusting screw 9 which is provided with a head 10 slotted for use of a screw driver. By turning the adjusting screw to draw the cones together the faces of the abrasive members are moved to a greater radial distance from the axis of the tool and bythe reverse turning of the screw the 'cones are retracted which is preferably accomplished through use of the spring members 9 and 10 which engage the lips 2 of each of the holders tending to contract the same.

The two cones are yieldingly held apart by a spring 9 surrounding the screw 9 and bearing against the inner ends of the cones, as shown 1n Fig. 1.

Subsetent to the formation of the channel mem r by means of a die as stated, the shouldered pins 3 and 4 have the reduced portions 11 thereof inserted through apertures provided ad'acent each end of the shell or member 1 an the ends thereof peened over to fixedly secure the pins in place. `[.Ipon completion of this step the holder consists of the assembled channeled member and pins which are maintained in fixed relation with the shell but it is to be understood that the channel member may be provided with means for contacting the cones other than what is here termed pins Such different form of holder is shown in mv ending apllcation Serial No. 44,644 filed Jliily 20, 1925 m which it will be observed that the principal feature of this invention may be utilized in either form 'of cone contacting member.

This shell or channeled member 1 further has an aperture in the bottom 1 thereof midway between the cone contacting devices indicated at 11 in Fig. 4 and, to secure the stone 12 in place in the holder, I place the holder in a form or mold 13 with the longitudinal edges 15 of its side fianges 1 engaging gage faces 15 thereof as indicated diagrammatically in Figs. 4 and 6. In the form or mold has reviously been positioned the stone 12 which) also lies with its longitudinal outer or working face 12 on a gage face 14 of the form or mold exactly parallel with the gage faces 15 of the form. Due to the two side edges 15 of the channel member being finished to a definite length from the outer side of the bottom l, the face 12 of the stone 12 is arallel with said bottom. In the position o the arts shown in Fig. 4 the stone and the hollder are therefore in a relationship in which they are to be fixed and to fix these parts together I introduce a solder or other self-hardening material 13 through the aperture 11. The inaccuracies in stone thickness shown at 12" in Fi 5 are thus disposed within the holder and t e fece 12 of the stone lies parallel with the side edges 15 and bottom of the holder at exactly a r1 ht angle to the axes of the pins 3 and 4.

'Ie assembled abrasive and holder is then removed from the form and the pins 3 and 4, or the cone contacting member of whatever form, are finished off for contact with the adjusting cones at an exact length measuring from the face of the stone. f pins be utilized for the cone Contactin members, as is herein shown, and due to t e edges 15 of the channeled member being finished olf parallel with the bottom of the said member against which the shoulder of the pins engages, the axes of the pins are therefore, by this method, exactl at a right angle to the face of the stone. rllhis accuracy in relationshi of the stone and holder is necessa in or er to secure precision in operation o the tool and to function with the adjusting means so that the faces of all the stones cut the same circle.

The object of the invention therefore is secured by this method and character of device-that is, by this form of holder and method of making thereof I secure precision and secure a grinding tool that is accurate in the finishing of a piece of work and accurate throughout all of its possible adjustments.

I am aware of other devices of this general character in which abrasive members are utilized many of which have stones and holders that are spring projected to working contact with the wall of the aperture being ground. This tool operates differently in that the holders are positively held in the adjusted position, and while the cone members 6 and 7 may traverse or move as a unit longitudinally of the tool body and thusl permit the abrasive at one end to move toward the axis of the tool and at the other end outwardly therefrom as is set forth in the above mentioned pending application, et as the tool in its operation is relieved rom pressure through the rinding away of the surface operated on te adjusting unit including the said cones takes the neutral position shown in Fig. 1 in which the faces of the stones lie exactly arallel with the axis of the tool. This position being assumed at the completion of the grinding operation as the tool grinds free, the aperture being ground through reciprocation and rotation of the tool therein vis of a uniform diameter throughout its length and with a straight wall. This accurac in o eration is secured b the character o the older herein disclbsed and the absorption of possible inaccuracies b means of a fluid medium 13 flowed or oa-ted between the holder and the stone.

The combined abrasive and holder therefore provide a unit toreplace worn units of like character and has been devised to avoid inaccuracies resultin from the user of the tool attem ting to rep ace a worn stone in holders as eretofore utilized in this art. To secure precision in operation of the tool` the unit should be replaced by a new unit of the same accuracy and precision as the worn unit.

By ga ing the longitudinal face of the stone an the longitudinal edges of the base or holder in parallelism on the mold the `stone and holder may be secured together by self hardening material in a technically correct position relative to each other and the guide pins and the co-operatin parts on the body regardless of any irreguarities on the back of the stone, as shown at 12h 5 and 6.

It will be noted that this combined abrasive and holder permits of ready replacement of similar articles used in a cylinder grinder in that the stone supporting base provides means for determining and maintaining a desired relation of the abrading surface carried thereby to the axis of revolution and traverse of the cylinder grinder, and that the grinding stone orv abrasive is secured to the base by a substantially rigidi adherent material which permanently positions the stone with reference to the base and with its abrading surface in said determined position, so that on assembly in the tool the working face of the stone occupies a technically correct yworking position.

in Figs.

Having thus fully described my invention,

its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States isf 1. As a new article of manufacture, a' combined abrasive and holder therefor adapted for replacement of similar articles used in a cylinder grinder such as described comprising a channeled member and a grinding stone or abrasive secured in the channel by means of a solder and with the face of the stone parallel with the back of the channel member, guide pins secured to the back of the member each having its axis at a right angle to the said back and finished to an equal length from the face of the stone.

2, A combined abrasive and holder therefor adapted for replacement of similar articles used in a cylinder grinder such as described comprising a channeled stone supporting base providing means for determining and maintaining a desired relation of an abrading surface carried thereby to the axis of revolution and traverse of the c linder grinder, and a grindin stone or a rasive secured in the channel o? said base by means of a substantially rigid adherent material permanently positioning the stone in the said channeled member with its abrading surface in said determined relation whereby on assembly in the tool the working face of the stone occupies a technically correct working position.

3. A combined abrasive and holder for cylinder inders comprising a stamped sheet metal older of channeled form having inteal lugs at its opposite ends for a retaining element, a pair of guide pins extending from the back thereof, and an abrasive or stone secured in the holder by a hardened Huid adherent material permanently positioning the working face of the abrasive or stone at a right an le to the lon itudinal Aaires of the pins, sai pins having t ieir free ends finished in like form to equal length from the working face of the stone.

4. A combined abrasive and holder therefor adapted for replacement of similar articles used in a cylinder grinder such as described, comprising a stone supporting base providing means for determining and maintaining-a desired relation of an abrading surface carried thereby to the axis of revolution and traverse of the cylinder grinder; andy a inding stone or abrasive secured thereto y means of a substantially rigid adherent material permanently positioning the stone with reference to the base with its abrading surface-in said determined relation,

whereby on assembly in the tool the working face of the stone occupies a technically correct working position.

5. A combined abrasive and holder therefor adapted for replacement of similar articles used in a cylinder grinder such as described, com risin a stone supporting base and paralle i e pins pro3ecting transversely from t e outer side of the base, said base and pins providing means for determining and maintaining a desired relation of an abradinn' surface carried thereb to the axi of revoution and traverse of 5the c lindeis relation, whereb grinders; and a. grinding stone or a rasive secured to me base by means of a substantlally rlgld adherent material which pernically correct working position.

cation.

manently positions the stone on the base and with its abrading surface in said determined MARSDEN C, HUTTO.

- y .DISCLAIMER 1,692'661.-Maradn 0. Hutto, Detroit,l Mich. Column ABBAsIvn AND Cminmn.

, tent assignee, Hutio Engineeringompany, Inc. y Hereby enters this disclaimer to lall of the claims of said specification, which discleimer 1s in the'iollowing words, to wit: hereby disclaims as to each of the said claims any and abrasive and holder assemblies ezcept wherein the stone is permanently positioned bythe self-hardening material or solder in the holder with the workirlx face or ebradmg' surface in the position referred to in ech claim by a form 0T m0 substantial amounteo as to' form e'spacer between ell the adiacente stone and the holder. I www Gam'npl 8,1980-1 aces of the on assembly in the tool 'he working face o the stone occupies a tecn- In testimony whereof I sign this specifidated November-20, 1928, Disclaimer filed Merch 26, 1930, by the;

casting operation 'and the sell-hardening mterial'or solder is` elrlnlloyed in a.

abradinn' surface carried thereb to the axi of revoution and traverse of 5the c lindeis relation, whereb grinders; and a. grinding stone or a rasive secured to me base by means of a substantlally rlgld adherent material which pernically correct working position.

cation.

manently positions the stone on the base and with its abrading surface in said determined MARSDEN C, HUTTO.

- y .DISCLAIMER 1,692'661.-Maradn 0. Hutto, Detroit,l Mich. Column ABBAsIvn AND Cminmn.

, tent assignee, Hutio Engineeringompany, Inc. y Hereby enters this disclaimer to lall of the claims of said specification, which discleimer 1s in the'iollowing words, to wit: hereby disclaims as to each of the said claims any and abrasive and holder assemblies ezcept wherein the stone is permanently positioned bythe self-hardening material or solder in the holder with the workirlx face or ebradmg' surface in the position referred to in ech claim by a form 0T m0 substantial amounteo as to' form e'spacer between ell the adiacente stone and the holder. I www Gam'npl 8,1980-1 aces of the on assembly in the tool 'he working face o the stone occupies a tecn- In testimony whereof I sign this specifidated November-20, 1928, Disclaimer filed Merch 26, 1930, by the;

casting operation 'and the sell-hardening mterial'or solder is` elrlnlloyed in a.

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