April 29, 1947. \H. c. SATTERTHWAITE 2,419,660 HONE Filed Jan. 17, 1945 2 Sheets-Sheet 1 INVENTOR. _ April 29, 19477. 2,419,660 . H. C. SATTERTHWAITE HONE Filed Jan. 17, 1945 2 Sheets-Sheet 2 .liuIv?l \\ nu ‘.T§ . ‘ . I . l/Io.IEVIA 2,419,650 Patented Apr. 29, 1947 UNITED STATES PATENT OFFICE 2,419,660 HONE Harry G. Satterthwaite, Detroit, Mich. Application January 17?, 1945, Serial No. 573,149 13 Claims. (01. 51-4843) 1 2 . This invention relates to hones employed for removing material by an abrading action from the surfaces of cylindrical bores. Objects of the invention include the provision The present invention particularly relates to that class of hones adapted for operating upon rela provision of a hone including a novel form of connection between the abrading elements and and particularly when not operatively engaged in tively small bores, and for this reason it is not possible to include the relatively intricate mecha nism that it is possible to employin hones de of a novel form of hone including a tapered signed to operate upon relatively large bores as, mandrel and abrading elements mounted there for instance, the bores of engine cylinders or the on, the abrading elements being shiftable lon like. Hones of the type to which the present in gitudinally with respect to the mandrel so as to vention is related must therefore be relatively vary the effective diameter of the hone, and in which a novel form of connection is provided be 10 simple in construction, but at the same time, in order to be commercial they must be constructed tween the vmandrel and the abrading element to e?iciently operate with a minimum of trouble. serving to maintain the abrading elements in One of the main problems in connection with position under the effects of centrifugal force the type of hone herein under consideration is during operation; the provision of a hone hav ing a novel form of mechanism for effecting rel 15 the means employed for holding the abrading elements to the mandrel so that they will'not be-v ative movement between the abrading elements come disconnected during rotation of the hone, and the mandrel longitudinally of the latter; the a bore to be finished thereby. The hone of the means directly connected thereto for imparting 20 present invention has been particularly designed with this feature in mind, as well as to provide relative longitudinal movement between the a simple and economical means and mechanism abrading elements and the supporting mandrel; for adjusting the hone to compensate for wear and the provision of a novel form of abrading of the abrading elements thereof. element for a hone of the character described. Referring now to the accompanying drawings, The above being among the objects of the pres 25 and particularly to the construction illustrated ent invention, the same consists in certain novel in Figs. 1 to 8 inclusive, it will be noted that the features of construction and combinations of hone in question comprises a mandrel indicated parts to be hereinafter described with reference generally at In having a generally cylindrical rear to the accompanying drawings, and then claimed, end portion l2 and an outer or forward, tapered having the above and other objects in view. 30 portion indicated generally at l4. Preferably the In the accompanying drawings, which illus mandrel I0 is formed from a cylindrical piece of trate suitable embodiments of the present inven stock and the end portion l4 formed by ma tion and in which like numerals refer to like parts chining away opposite sides thereof to provide throughout the several different views, of oppositely disposed, fiat faces l6 which, Fig. 1 is a fragmentary, partially broken, par 35 aaspair perhaps best brought out in Fig. 4, in section, tially side elevational View of honing apparatus are arranged in parallel chordlike relation, and embodying the present invention; 7 each extends from one side of the mandrel to Fig. 2 is an enlarged, partially broken, par but short of the opposite side thereof where it tially sectioned, side elevational view of the hone is bounded by an outwardly eXtending wall [8 40 shown in Fig. 1; which extends out through the otherwise cylin Fig. 3 is an end elevational view of the hone drical surface of the mandrel. Each face I6 is, shown in the preceding ?gures taken in the di of course, disposed longitudinally at the same rection of the arrows 3—3 of Fig. 2; angle to the axis of the mandrel Ill to obtain Fig. 4 is an enlarged, transverse, sectional view 45 the wedge-like character of the end l4 shown. taken on the line 4-4 of Fig. 2; It will be observed that the walls iii are each po Fig. 5 is an enlarged, fragmentary, sectional sitioned at the trailing edge of their correspond view taken axially through the outer end of the ing surfaces It with respect to the direction of mandrel and the abrading elements thereon as rotation of the mandrel, indicated in Figs. 3 and on the line 5-5 of Fig. 4; 4 by the arrows ‘2E3. The walls [8 are not‘per Fig. 6 is an enlarged, fragmentary, transverse, 50 pendicular to the planes of the corresponding sectional view taken on the line 6-4:‘ of Fig. 2; walls IE but are inclined so that their outer ends Fig. 7 is an enlarged, transverse, sectional View overlie the junction with their corresponding taken on the line ‘l--'l of Fig. 2; ' wall, and, while they may be either ?at or curved, Fig, 8 is an enlarged end view of the mandrel they are preferably curved as illustrated, but, in taken looking in the direction of the arrows 8-8 of Fig.2; and ' ' Fig. 9 is a fragmentary side elevational view illustrating the application of the present inven tion to a hone having abrading elements arranged in tandem or multiples. either case, so as to provide a more or less hook like engagement with respect to the co-operat ing abrading elements to be received thereby. It is the surfaces It which taper toward one 60 another in extending from the portion l2 toward 2,419,660 3 4 the outer end of the mandrel so as to provide the forward end of each corresponding backing mem ber 26 is provided with a tongue 36 which is bent wedge for adjusting the effective diameter of the abrading elements, the height of the walls [8 above their respective co-operating walls or sur faces l5, therefore, being of a minimum height with a minimum amount of hook at the rear end into ?at, contacting engagement with such in clined face ofthe corresponding notch 34. Pref erably the notches 34 are of greater axial depth than the thickness of the tongue 36 so that the of the surfaces l5 and being of a maximum height Y . - backing members 26 lie in axially spaced relation and, therefore, provided with a maximum amount of overlie or hook with respect to the line of‘ " rearwardly of the forward or outer end face of the abrasive elements, this feature permitting the junction between them and the corresponding 10 abrasive elements to be passed axially into con surfaces It at their axially outer ends. The dis tact with the blind end of a bore, or against the tance from the line of junction of each surface I8 shoulder inv a bore, of a workpiece being operated with its corresponding surface it from a plane , upon. including the axis of the mandrel and perpen The backing member 26 may be formed from dicular to the surfaces it remains constant over 15 sheet metal or may be die-cast from suitable the length of the portion M so that each pair metal or other material suitable for the purpose. of surfaces it and It may be formed by a prop In any event, the ?anges 28 and 39 are prefer erly contoured milling cutter by one pass of the ably so spaced that, when applied to the mandrel,v same over the length of the portion l4. the ?ange 3!! is pressed in a direction to urge the Also as best brought out in Fig. 4, a slot 22 is 20 flange 28 thereof against the corresponding sur provided in the portion M and extending down face l8 of the mandrel and hold it ?rmly in con wardly from each surface IE on that side of the tact therewith. At the same time, because of center thereof opposite the wall 18, and each slot the angularity of the ?ange 3B and of its asso 22 is inclined outwardly away from the center of ciated groove 22, this causes a tension to be set its corresponding surface [5 in extending down 25 up between the flange and the groove tending to wardly therefrom. The slots 22 open onto their pull the opposite side of the corresponding abra corresponding surfaces It at a constant distance sive member 24 downwardly intop?at contacting from the line of junction of such surface and the relationship with respect to the surface l6. Be ‘co-operating wall it and extend from the rear cause of the hooklike characteristics of the sur or inner end of the portion 5% to a point close 30 face it! and the described angularity of the slots to, but inwardly spaced from, the outer end of the portion l4 as best brought out in Fig. 5. This last feature is so that the slot 22 will not cut the 22 and the co-operating ?anges 3B, eachabrading member 2A is firmly held to the mandrel so as to resist the centrifugal force to which it is sub end of the mandrel into separated parts but will jected during rotation of the hone, particularly leave it tied together. 35 when the hone is not actively engaged in the bore. An abrasive or abrading member, indicated gen Furthermore, and particularly where the ?ange erally at 24, is received by each co-operating pair or tongue 39 of each abrading member 24 is so spaced with respect to the corresponding ?ange of surfaces It and iii, the inner surfaces of each abrading member being formed to a shape and 28 thereof as to be placed under a tension tend contour complementary to the surfaces 56 and 18 40 ing to urge the ?ange 28 against the correspond so as to have substantially surface engagement ing surface l8 of the mandrel, each abrasive mem ber 24 is constantly urged into ?rm contacting therewith. The radially outer surfaces of each member 24 are formed as part of a cylindrical relationship with respect to the corresponding surface, the longitudinally extending lines of surfaces I6 and iii of the bone. This last feature which are parallel to the axis of the hone, and 45: has the additional advantage of eliminating any when the abrading members 24 are adjusted to space between the abrading member and the man the proper axial position on the outer or wedge drel into which particles of abrasive worn from portion l4, such outer surfaces of the abrading the abrasive elements 32 in service may ?nd their members are concentric with the axis of the hone. Each abrasive or abrading member 24 com prises preferably a metal backing member 28 way, thus not only possibly interfering with the proper operation of the hone, but through their abrading action fostering early destruction of the hone. The ?anges 30 may be readily bent to obtain the above-described tension if not orig inally in a position resulting in this effect. adapted to lie in ?at, contacting relationship with the corresponding surface It and provided with an upstanding ?ange along one edge, the outer face of which is complementary to the corre 55 It will be observed from the arrows 2t illus trated in Figs. 3 and 4 and which illustrate the sponding surface N3 of the mandrel and which lies thereagainst. Intermediate its ends, each normal direction of rotation of the hone, that backing member 25 is provided with a down the surfaces It act to take the primary driving wardly and outwardly struck tongue 30 arranged force between them and the mandrel l0 necessary at substantially the same angle with respect to 60 to rotate the abrading members 24 in a bore, and the surface is as the groove 22 and is received that the resistance to turning the abrading mem within‘ the corresponding such groove. Each bers 24 in a bore reacting through the surfaces abrading member 24 further includes an abrasive is act in a direction tending to pull the abrading element 32 which is ?xed to its corresponding members downwardly against the corresponding backing member 26 by any suitable or conven 65 surfaces I16. This effect supplements the action tional means, as for instance, by suitable cement of the ?anges 3B acting in the same direction. or the like. As an added means for securing each abrasive It will be understood from the above that in practice the abrading members 24 are mounted element 32 to its corresponding backing member against relative axial movement on the mandrel 26, and particularly to hold it against movement 70 ID, that the mandrel is rotated and relative re axially of the hone in an outward direction, the ciprocation is effected between the work and the outer end of each abrasive element 32, as best hone while the abrasive members 24 are received brought out in Fig. 5, is provided with a notch within a bore to be operated on thereby. Under 34, the radially inner face of which is inclined such conditions, it will be appreciated that the rearwardly from its radially inner edge, and the abrading members 211 are positioned axially of 2,419,660 5 6 with respect to the surface of the bars 42 as shOWn so that the downwardly bent portions 50 their combined effective diameter is substantially serve in the nature of ratchet teeth locking each that of the bore being operated upon, and that as bar 42 to its corresponding abrading member 32 the abrasive elements 32 wear because of contact against movement in either axial direction. This with the work, the abrading members 24 are gives a construction, which securely and rigidly shifted longitudinally on the end 14 to increase locks each abrading member 32 to its correspond the effective combined diameter thereof and thus ing bar -42 and yet provides one which permits compensate for such wear. , In accordance with relatively ready removal of the bars 42 from the the broader aspects of the present invention, any suitable means may be. provided for shifting the 10 abrasive members when replacement of the abra sive members because of wear becomes necessary, position of the abrading members 24 axially out and permits ready securement of the bars to the of the mandrel I0. However, in accordance with new wear members where thus substituted for a more limited phase of the present invention, a the old. It might be noted at this point that pref novel form of means'is provided for this purpose erably the extensions 44 of the backing member 15 and will now be described. ' 26 are formed to present outwardly projecting The mandrel I0 is provided with a pair of dia longitudinally extending ribs or beads ‘52 on either metrically opposite grooves 40 formedftherein in side of the hole formed in each backing member parallel relation to the axis thereof and the bot by provision of the corresponding strap 46, there tom surfaces of which are parallel to the aXis by to reinforce and rigidify the portion 44 over of the mandrel. As best brought out in Fig. 2' 20 the length of such hole. the wedgelike'. end l4 of the mandrel It so that the grooves 40 may extend from a point substan tially midway the length of the cylindrical por tion l2 of the mandrel to some suitable point intermediate the length of the tapered portion l4 thereof. Each groove vllll is so positioned an gularly of the mandrel that it lies centrally of one of the surfaces It on the tapered end of the man drel. While the grooves 40 may be of any suit It will be appreciated that the bars 42 may, in the broader aspects of the invention, be connected to any suitable form of actuating or control 25 means for controlling the relative position there of axiallyv of the mandrel l0. However, the _ means provided in accordance with the present invention is preferable and is brought out in Fig. 2. As indicated in Fig. 2 the rear or cylin able cross-sectional con?guration, preferably they drical portion I2 of the mandrel I0 is axially slid are of rectangular cross-sectional con?guration 30 ably received within a sleeve member 60, and as best brought out in Fig. 7 and in such case in the forward end of such sleeve member BI] is each thereof is received a preferably rectangular provided with a diametrically disposed slot 62 ex ly sectioned bar 42.? tending completely across the same. The slot ‘62 As best brought out in Figs. 2an'd 5, and par is of a cross-sectional size and con?guration sub ' ticularly the latter view, the central ?at portion stantially equal to that of the bar members 42, of each backing member 26 is extended axially and the rear ends of the bar members 42 are rearwardly beyond the end of the corresponding bent radially outwardly as at 64, and the end abrasive element 32, as indicated at 44, and each 64 of each bar member 42 is received in that end portion 44 in line with the corresponding groove of the slot 62 in the corresponding side of the 40 is formed to provide an integral downwardly 40 centerof the mandrel. A cupshaped cap mem projecting U-shaped strap'lportion 46 which ?ts, or at least is slidably received, within such cor _ responding groove 40. A similar strap 48 is pref erably formed in the baseof each backingmem~ ber 26 within the length of the corresponding abrasive element 32 as brought out in Fig. 5 in particular. The straps ~46 and48 are preferably formed by transversely slitting the backing mem ber over its central portion over a width corre ber 66 having an end wall which is apertured to receive'the end l2 of the mandrel is threaded on the forward end of the sleeve 60 as indicated in Fig. 2 so that its end wall con?nes the outwardly turned ends 64 of the bars 42 against relative axial movement with respect to the sleeve 60, but at the same time permits radial movement of the ends 64 in the grooves 62. It will be appre ‘ ciated that this last feature is necessary, inas sponding with the desired width of the strap and 50 much as the bar members 42 move radially with at points spaced axially of the backing member respect to the axis of the mandrel as the abrading corresponding to the desired width of§the_strap, members 24 are shifted. axially of the wedge l4 and then drawing thepart within the split down of the mandrel. Thus, by the construction de wardly to form such strap. ' . scribed, if the mandrel Illv is shifted axially with The forward ends of the bars 42 have their, 55 respect to the sleeve 60, relative axial movement outer surfaces tapered into complementary angu is caused between the abrading members 24 and larity to that of the inner faces of the abrading the mandrel which relative movement a?ects members 24 and are received against the under either relative expansion or contraction of the faces‘of the corresponding backing members 26 abrading members 24, as may be desired. and are projected through the two corresponding 60 In order to enable control of the relative axial straps 46 and 48 thereof until they are snugly shifting movement of the‘ mandrel with respect received therein and against the under-face of to the sleeve 60 to be had and provide a means they corresponding backing member 26, in which for rotating-the hone, the sleeve 60, as brought position they are ?xed to the corresponding back out in Fig. 1, is in turn received in a sleeve Til. ing member 26. Preferably, and in accordance 65 The sleeve 10 isshouldered as at 1-2, and the with a more limited phase of the present inven sleeve 60 is received against such shoulder and tion, in order to lock each bar 42 to its correspond securely clamped thereagainst by means of a set' ing backing member 26, each bar 42 in line ‘with screw such as 14 disposed at an angle to the axis the forward andrearward edge of the opening provided therein by the formation of the strap 70 of the mandrel and the sleeve 60 in a direction such that upon tightening the set screw‘ '14, it not‘ 46 is inwardly notched, as brought out in Fig. 5, only locks the sleeves 60 and 10 together against and the metal of the corresponding extension relative rotation, but urges the sleeve 60 against 44 at the corresponding'edge of such opening'is the shoulder 12. v , 1 driven down into such notch as indicatedat v50. The notches are preferably angularly disposed 75 In order to restrain the mandrel 10 against 254193.60‘ 7 relative rotation with respect to the sleeves 60, and ‘N1, the bore of the sleeve 60 is provided-with a longitudinally extending keywayv ‘l6, and the mandrel H] is provided with a key 18 secured against movement therein and slidably received within the keyway ‘25. ‘Where it is desired to rotate the home, then, of coursetthe sleeve ‘IE1 is mounted for rotation, as by means of a mem 8 reciprocation will not; causei relative-expansion andcontraction of the hone. It will be appreci ated thatby rocking the lever I02 about its pivot pin I06 the relativeaxialposition of the mandrel 50 with respect to the abrading elements 24 will be effected, thereby to effect anincrease or a de crease of the effective diameter of the hone, de pending upon the direction of reciprocation. In honing long holes it is generally not advis ber'Hl and suitably driven, and where it is desired not only to rotate the hone, but also to recipro 10. able to attempt to use a short hone, particularly cate it axially, then the sleeve 10 is not only where the hone is to be utilized in straightening mounted for rotation in, but for axial reciproca up thebore. At the same time, it is impractical tion with, the member 19 as well. Any suitable in such case to makethe abrasive members such or conventional means may be provided for ro~ as 24 of relatively great length, particularly for tating the sleeve ‘l9 and/or axially reciprocating is small bores, for in such case the angularity of the member 19. » the wedge-shaped end of the mandrel is neces It is ordinarily undesirable to make the man sarily so small that the effective life of an abra~_ drel H} of such length that it will project through sive member is so short as to beimpractical. The the length of the sleeve TE and its co-operating practical way to provide a long hone in such cases parts, ‘and in such case in order to enable rela 20 is to provide one with a plurality of pairs of hon tive axial movement of the mandrel H1 and the ing members arranged in tandem thereon. A sleeve, 6!! to be controlled, it is necessary to pro novel means of connecting such abrading mem vide an axial extension on the rear end of ‘the bers for simultaneous expansive and/or contrac mandrel it. While this maybe accomplished in tive movement is provided in accordance with a any suitable or conventional manner, in the pres-r 25 further phase of the present invention and is shown in Fig. 9. ' . ' ent case the rear end of the mandrel, as best brought out in Fig. 2, is annularly grooved as at Referring to Fig. 9 it will ‘be noted that the 80 and is provided‘with a head 82 rearwardly mandrel there shown up to a point indicated at beyond such groove. This head $2, as best H0 is identical to the mandrel heretofore de brought out in Fig. 8, is originally circular in 30 scribed,_and corresponding features thereof are indicated by the same numerals, except that such section and concentric with the axis of the man drel it, and its opposite sides are ?attened off numerals bear a prime mark, This portion of as at 84. A concentric extension 86, as brought the mandrel, therefore, does not require to bevv redescribed. The mandrel H1’ is axially extended out in Fig. l, is provided for, the mandrel H] and ispreferably of the same diameter as shown. On 35 beyond the end of the mandrel In as previously its' forward end, it is provided with a so-called described to such extent as is necessary to‘ ac “locking nose” 88; which comprises a, cup-shaped commodate the desired additional numbers of pairs of 'abrading members. It will, be ‘appreci member ?tting over the same and ?xed against ated that it may be extended to ‘receive one ad relative movement to it, as by means of a pin 89 or other suitable means. The bottom or end 40 ditional pair of abrading members, two addi wall of the locking nose 88 is centrally provided with an opening there-through of the same con tour as the head 82, or optionally with a cross-slot 90 of slightly greater width than the width across the flats 85 of the head 82 so as to be capable of receiving the head 82 therethrough. This slotted bottom wall of the nosepiece 88 is of sub tional pairs of abrading members or any desired number of pairs of abrading members. In Fig. 9 it is shown as extended su?iciently to accommog‘ date two additional pairs of abrading members in tandem with the ?rst or inner set ofabrading ' members. Accordingly it is-shownras being pro vided on each side thereof corresponding with each of the inclined surfaces I6’ with additional inclined surfaces Mia and lGb in axially spaced, through the hole orslot 98, and then turned, 50 relation with respect to each other and to'the surface “5', and it will be understood that each through 90°, for instance, thereby to lock the stantially the same thickness as the width of the slot 80, so that the head 82 may be projected of the surfaces I61; and I617 are bounded at one mandrel lG'to the extension 85 for equal axial side thereof by surfaces corresponding to‘ the movement. Means, as, for instance, a key 92 surfaces l8 ?rst described and each is provided ?xed in the extension 85, working in a’ keyway 94 in the sleeve member '70, serves to releasably 55 with grooves therein corresponding with the grooves 22 previouslydescribed.v secure the mandrel i0 and extension 86 against The abrading elements 24’ which are received relative rotation in service, and, therefore, in axially connected relation. on the surfaces I6’ may be identical to the abrad While any suitable means may be provided for ing elements 24 ?rst described and connected to e?’ecting relative reciprocation between the man 60 the bars 42' in identically the same manner'as drel l0 and sleeve TB in order to control the ef ?rst described, with the exception only that the fective diameter of the operative end of the hone, forward end of the backing member 26' therefor one form of such mechanism is shown more or is extended as at H2 and inclined ‘radially out less diagrammatically and isas follows. The rear wardly and formed with a transverse bifurcated 65 end of the extension 86 is provided with an an~ or yoked eye “4 at its free end. The mandrel nularly grooved collar I95} ?xed thereto. The bi 10' between the siu'faces l6’ and Him is suitably furcated end of a lever I02 bridges the opposite cut away to accommodate the end H2 and eye sides of the collar I 90, and each arm on such I I4, and it, is similarly cut away betweenthe sur~ bifurcated end is provided with an inwardly pro faces 16a and l6b. The backing member 26a jecting pin HM which is received within the groove 70 for each of the next outward abrading members of the collar IUD. The lever W2 is pivoted at I06 24a, may be identical to the backing member 26, to a suitable part held in axially ?xed relation previously described, except that it is not formed with respect to the sleeve 19, as, for instance, with the straps such as 46 and 48 for reception of the member '19, this being necessary so that in event the wholeassembly is reciprocated, such a bar member such as 42, and its rear end is formed toprovide an eye for reception between 2,419,630 abrading member received in the corresponding the opposite arms of the bifurcated eye H4 and i is connected thereto by means of-apin 116, thus said groove. ~V ' a r - I 2. In a honing device, in combination, a man serving to interconnect, the abrading elements : 24' and 24a for simultaneous axial movement with respect to the mandrel ID’. The backing members 26a in turn are each provided with a forward extension [12a identical to the extension H2 of the backing members 7 drel vhaving a ‘pair of ?at surfaces arranged on to the abrasive members ?rst described and be ?rst-mentioned surface, said mandrel being pro vided with a ‘longitudinally extending groove therein in association with each of the ?rst-men tioned surfaces, each said groove opening onto the corresponding first-mentioned surface in par 15 allelism to the line of junction of said corre sponding ?rst-mentioned surface and the corre sponding of said second-mentioned surfaces and extending from its point of opening onto said '7 opposite sides of the-longitudinal axis thereof and bothequally inclined to said axis in the same "direction to form a wedge, a wall bounding the angularly corresponding edge of each of said sur- ‘ facesandproviding a surface overhanging the 26'. The abrasive members 24b which are re ceived upon the surfaces 16b may be identical 10 line of junction between it and the corresponding ‘received on the mandrel in the identical manner, with the exception that like the backing members 26a, they are devoid of any loops such as 46 and 48 in the ?rst-described construction and their. rear ends are extended and provided with eyes co-operating with the forward bifurcated eyes “4a of the corresponding backing members 26a and secured thereto by corresponding pins “6b. The forward ends of the backing members 261) for 20 corresponding ?rst-mentioned surface at an_in ,clination to such surface away from the corre the abrading members 2412 are not extended as sponding second-mentioned surface, an abrading in the case of the backing members 26a, but may member having surfaces complementary to each be formed in the identical manner to the for co-operatingv ?rst and second-mentioned sur ward ends of the backing members 2'6‘?rst de faces and receiving in complementary relation ' scribed. with respect thereto, and a projection on ‘each It will be appreciated from the above that from said-abrading member received in the corre the construction illustrated in Fig. 9, the mandrel sponding said groove, said projections being resil is provided with a series of inclined or wedgelike ient and bearing against that face of the corre-, ‘portions arranged in tandem to each other and sponding said groove opposite the corresponding each of the same angularity, and that the 30 abrasive members are applied to each of the wedgelike portions in substantially the same manner as the abrasive members ?rst described second-mentioned surfaces whereby to resiliently urge said abrading membersagainst both said co operating surfaces. I > _ 3. In a honing device, in combination, a man and are therefore mounted thereon against radial movement under the influence of centrifugal 35 drel having a pair of ?at surfaces arranged on opposite sides of the longitudinal axis thereof and force, but may be shifted longitudinally thereof to both equally inclined to said axis in the same vary the effective diameter thereof. Further direction to form a wedge, a wall bounding the more, it; will be appreciated that in view of the angularly corresponding edge of I each of said fact that all of the pairs of abrasive members are secured together for equal and simultaneous 40 surfaces transversely curved on its innerside to provide a curved surface extending into ove_r—_ movement axially of the hone, the effective diam eter of all pairs of abrasive members may becon trolled in identically the same manner asin the construction ?rst described. It may also be hanging relation with respect to the julmion be tween ‘it and the corresponding ?rst-mentioned surface, said mandrel being provided with alon gitudinally extending-groove therein in associa noted that the additional abrasive membersmay 45 tion with each of the ?rst-mentionedv surfaces, be removed from the mandrel for the purpose of each said groove opening onto the corresponding replacement or repair by simply driving out the ?rst-mentioned surface in parallelism to the line pins I I6 and ll?a which thereby disconnects the of junction of said corresponding ?rst-mentioned abrasive members from one another. , surface and the corresponding of said second-7 Having thus described my invention,.what I 50 mentioned surfaces and extending from its point claim by Letters Patent is: ‘ of opening onto said corresponding ?rst-men 1. In a honing device, in combination, a man tioned surface at an inclination to such surface drel having a pair of ?at surfaces arranged on away from the corresponding second-mentioned opposite sides of the longitudinal axis thereof and surface, an fabrading member having surfaces 55 both equally inclined, to said axis in the same complementary to each co-operating ?rst and direction to form a wedge, a wall bounding the second-mentioned surfaces and receiving in com angularly corresponding edge of eachof said surfaces and providing a surface overhanging the line of junction between it and the corresponding ?rst-mentioned surface, said mandrel being pro 60 vided with a longitudinally extending . groove plementary relation with respect thereto, and a projection on each said abrading member received in the corresponding said groove. " ‘ .4. “In a. honing device, in combination, a man; drel having‘ a ‘pair of flat surfaces arranged-on opposite 'sides of the longitudinal axis thereof and both equally inclined to the axis in the same therein in association with each of the ?rst-men tioned surfaces, each said groove opening onto the corresponding ?rst-mentioned surface in ' general direction to form a wedge, an abrading parallelism to the line of junction Of said corre 65 member received on eachof-said surfaces, said sponding ?rst-mentioned surface and the corre mandrel provided with a groove in opposite sides sponding of said second-mentioned surfaces and thereof in, alignment with said surfaces and each extending from its point of opening onto said extending into intersecting relationship with re corresponding. ?rst-mentioned surface at an spect to the corresponding of said surfaces, each inclination to such surface away from the corre 70 sponding second-mentioned surface, an abrading _ member having surfaces complementary to each co-operating ?rst and second-mentioned surfaces of said abrading members being provided onv its inner surface with a loop projecting into the cor responding of said grooves, and a rod receivedv in each of ‘said grooves projecting into the loop and receiving in complementary relation with respectthereto, and a projection on each said 75 of then'corresponding abrading member and'see. 2,419,660 11 'cured against relative longitudinal movement with respect thereto. I V i " ,5 5. In, av honing device, in combination'a man drel having v"a pair of flat surfaces arranged on opposite sides of the longitudinal axis thereof and both equally inclined to the axis in the same ‘general direction to form a wedge, an abrading ‘member received on each of 'said surfaces, said 12 device, a sleeve member nonrotatably but axi ally slidably receiving the opposite end of said mandrel therein, means interconnecting 'said abrading members vand said sleeve for maintain ing said abrading members at a ?xed distance with respect to said sleeve, the last-mentioned end of said mandrel having a noncircular head formed thereon, and an extension for said man » mandrel provided with a groove in opposite sides drel comprising a member axially shiftable there » thereof inialignment with said surfaces and each 10 with havinglan opening in one end thereof of a extending into intersecting relationship with respect to the corresponding of said surfaces, 'each of said abrading members being provided contour to slidab-ly receive said head therein and a shoulder axially inwardly of said opening co operating Withsaid head upon relative, turning on its inner surface with a loop projecting into movement between said mandrel and said exten ‘the corresponding of said grooves, a rod received 15 sion after said head has been received in ‘said in each of saidgrooves projecting into the loop opening operable to releasably lock said mandrel of ‘the’ corresponding abrading member, each of against withdrawal'from said extension. said rods having-a recess therein, and portions 9. In a honing device, in combination, a man offsaid loops- being ‘displaced into said recesses drel having a tapered end portion, abrading ele whereby to lock said abrading member against 20 ments received on said tapered‘ end portion and "relative longitudinal movement with respect to adapted ‘for relative movement longitudinally said rods. 7 therefor'to control the effective diameter of said 6. In a honing device, inv combination, a man device, a sleeve member nonrotatably but axially 'drel having-a pair of ?at surfaces arranged on slidably receiving the opposite end of said man opposite sides of the longitudinal axis thereof and drel therein, means interconnecting said abrad both equally inclined to the axislin the same gen ing members and said sleeve for maintaining said eral direction to form a wedge, an abrading mem abrading members ‘at a ?xed distance with re ber- received On each‘of said surfaces, said man spect to said sleeve, the last~mentioned end of drel provided with a groove in opposite sides said ‘mandrel having va noncircular head con thereof in alignment with’ said surfaces "and each 30 nected thereto by a neck portion of less cross extending into intersecting relationship with re sectional area than said head, a mandrel exten spect to the corresponding of said surfaces, each sion comprising a bar axially aligned with said of said abrading members being provided on its mandrel, a cupshaped member ?xed to that end vinner surface with a loop projecting’ into the cor of said bar opposed to said mandrel and arranged responding-of said grooves and having an open with its end wall'in spaced relation with respect ing above said loop, a rod received in each of to thecorresponding end of said extension, said said'grooves each projectinginto the loop of the end wall having an opening therein of a con corresponding abrading member, each of said tour to receive said head therethrough and being rods having a notch therein in approximate align of a thickness substantially equivalent to the nient with thé axially forward edge-of said open 40 length of said neck, said head being inserted ing "and a notch therein in approximate 'align through vsaid opening and relatively turned with merit-with‘ the axially rearward edge of said open respect to its entering position'w'nereby to lock ing; and the material of said loops at said'edges said head against relative axial movement to said of said’ openings- being displaced-into the corre cupshaped member. ' responding said notches whereby to look said 45 10. Ina honing device, in combination, a man abrading members to their'corresponding said drel‘having a tapered end portion,~abrading ele rods. ' i ' iIjn'a honing‘device, in combination, a man ments received on said tapered end portion and adjustable longitudinally of said mandrel thereon drel having a pair of ?at surfaces arranged'on whereby to vary the e?ective diameter of said opposite ‘sides of the longitudinal axis thereof 50 honing device, a sleeve axially‘ slidably receiving andfboth equally inclined to the axis in the same the opposite end of said mandrelutherein, means general direction to form a Wedge, an abrading co~operating between said mandrel andrsleeve member’received‘on each of said surfaces, said maintaining, the vsame against relative rotation mandrel provided with a groove in opposite sides with respect to each, other, means operativel'y con thereof in alignment with said surfaces ‘and each 55 necting said abrading elements and'said sleeve extending into intersecting relationship with re maintaining ‘said abrading elements at ‘a con spect to the corresponding of said surfaces, each‘ stant distance from said sleeve, a rotatable mem of'said abrading members comprising an abrad ber having a bore therein provided with a shoul ing element and a metal backing member there der, said sleeve being relatively closely received for projecting rearwardly therebeyond, the rear 60 in said last-mentioned member, and means co wardly'lprojecting portion of each of said back operating between said last-mentioned member ingjmembers being provided on its inner surface and said sleeve serving to simultaneously main with a loop projecting into the corresponding of tain said sleeve against relative rotation with ‘said- "grooves and an opening therein abovejsaid respect to said last-mentioned member and in loop, longitudinally extending ribs formed ineach 65 abutting relationship with respect to said shoul rearwardly projecting portion of said backing der. . members on each side of said opening therein, and 11., In a honing device, in combination, a man means locking each of said abrading members to drel having a tapered end portion, abrading ele its'corresponding said rod against relative axial ments received on said tapered end portion and movement with respect thereto. 70 adjustable longitudinally of said mandrel thereon > 8. In a honing device, in combination, a man drel having a tapered end portion, abrading ele ments received on said tapered end portion and adapted for relative movement longitudinally whereby to vary the effective diameter, of said honing device, a sleeve axially sli‘d'ably receiving the opposite end- of said’ mandrel therein, means co-operati-ng between said mandrel and sleeve thereof to control the'eifective diameter of said 75 maintaining the same against relative rotation 2,419,660 13 with respect to each other, means operatively connecting said abrading elements and said sleeve maintaining said abrading elements at a con stant distance from said sleeve, a rotatable mem ber having a bore therein provided with a shoul 14 of the next adjacent abrading member located axially rearwardly therefrom on the same side of said mandrel, whereby to interconnect all of said abrading members on the same side of said mandrel for equal movement axially of said man drel. der, said sleeve being relatively closely received in said last-mentioned member, means col-‘oper 13. In a honing device, in combination, a man drel having a plurality of axially spaced pairs of ating between said last-mentioned member and flat surfaces arranged on opposite sides of the said sleeve serving to simultaneously maintain axis thereof with both surfaces of said sleeve against relative rotation with respect 10 longitudinal each of said pairs equally inclined to the axis to said last-mentioned member and in abutting of said mandrel in the same direction to form a relationship with respect to said shoulder, a man wedge, an abrading member received on each drel extension received by said last-mentioned of said surfaces, each of said abrading members member in concentric relation with respect to comprising an abrasive element and backing said mandrel, the opposed ends of said exten 15 member secured thereto, the backing member of sion and said mandrel being formed for axial each of said abrading members positioned ax locking relation with respect to each other when ially rearwardly of the outermost pair of said in one relative position of angular relation with abrading members extending forwardly of its respect to each other and axially disengageable corresponding abrasive elements and the backing from each other when in another angular posi 20 member of each of said abrading members out tion with respect to each other, and means co wardly of the axially inner pair of said abrad operating between said extension and saidlast ing members being provided with an extension mentioned member releasably maintaining said projecting forwardly of the corresponding of extension in the ?rst-mentioned angular posi said abrading elements, said extensions termi tion. 12. In a honing device, in combination, a man 25 nating in eyes, and pin means passing through the eyes of each rearward extension and through drel having a plurality of axially spaced pairs of the eye of the forward extension of the next ?at surfaces arranged on opposite sides of the adjacent abrading member located axially rear longitudinal axis thereof with both surfaces of therefrom on the same side of said man each Of said pairs equally inclined to the axis 30 wardly drel whereby to interconnect all of said abrad of said mandrel in the same direction to form ing members on the same side of said mandrel a wedge, an abrading member received on each for equal movement axially of said mandrel. of said surfaces, each of said abrading members HARRY C. SATTERTHWAITE. comprising an abrasive element and backing member secured thereto, the backing member of 35 REFERENCES CITED each of said abrading members positioned axially rearwardly of the outermost pair of said abrading members extending forwardly of its correspond ing abrasive elements and the backing member of each of said abrading members outwardly of 40 the axially inner pair of said abrading members being provided with an extension projecting for wardly of the corresponding of said abrading ele ments, said extensions terminating in eyes, and means releasably interconnecting each said rear ward extension and the said forward extension The following references are of record in the file of this patent: UNITED STATES PATENTS Number 2,354,890 2,336,043 Name Date Staples __________ __ Aug. 1, 1944 Staples ___________ __ Dec. 7, 1943 2,349,994 Snader _____- ____ __ May 30, 1944 2,349,995 Archer __________ __ May 30, 1944 2,350,969 Sunnen ___________ __ June 6, 1944 '