US2277144A - Grinder - Google Patents

Description

March 24, 1942. H. PET-VERSEN 4 Filed Jan 29, 1940 2 She ets-Sheet 2 INVENTOR Ali/vs p5 rzqszA/ ATTORNEY Patented Mar. 24, 1942 GRINDER Hans Petersen, Minneapolis, Minn., assignor to Storm Manufacturing Company, Inc., Minneapolis, Minn, a corporation of Minnesota Application January as, 19.40, Serial No. 316,091

7 Claims.

This invention has relation to a grinder or grinding machine useful for a variety of purposes, but designed to be more especially useful to the purposes of grinding the connecting rod journals and the main journals of the crank shafts of automotive vehicles.

An object of the invention is to provide a grinding machine which will be of novel and improved construction.

A further object is to provide a grinding machine of the type herein presented wherein will be incorporated various-improved features and characteristics of construction which will be novel both as individual entities of said grinding machine and in combination with each other.

With the above objects in View, as well as others which will appear as the specification proceeds, the invention comprises the construction, arrangement and combination of parts as now to be fully described and as hereinafter to be specifically claimed, it being understood that the disclosure herein is merely illustrative and intended in no way in a limited sense, changes in details of construction and arrangement of parts being permissible so long as within the spirit of the invention and the scope "of the claims which follow.

In the accompanying drawings forming a part of this specification,

Fig. 1 is a rear elevational view of a grinder including features and characteristics of the invention, disclosed as when applied to one of the uses to which said grinder can be put;

Fig. 2 is a side elevational view of the grinder as it would appear when viewed from the right hand side in Fig. 1;

Fig. 3 is an enlarged longitudinal sectional view, partially in elevation and partially broken away, taken substantially on line 33 in Fig. 1;

Fig. 4 is an enlarged fragmentary front elevational view of the grinder;

Fig. 5 is an enlarged sectional view, taken substantially as on line 55 in Fig. 2, with parts omitted in the interest of clarity;

Fig. 6 is an enlarged plan view of a gear box cover removed from the grinder, detailing gear elements or gearing associated with said cover and adapted to be housed by said gear box;

Fig. 7 is an enlarged fragmentary elevational view of the disclosure of Fig. 6 as said disclosure would appear when viewed from the top of the sheet;

Fig. 8 is a sectional view, taken on line 88 in Fig. 6, detailing a shifter rod of the gear shifter device of the grinding machine; and

Fig. 9 is a view corresponding generally with the disclosure of Fig. 8., but showing said shifter rod situated in a different position.

'With respect to the drawings and the numerals of reference thereon, a frame for the grinder or grinding machine is denoted generally at .15. More explicitly, said frame 15 is of elongated configuration and is constituted as an elongated body portion 18 and an elongated extension portion ll upon and integral with said body portion.

The :body portion I6 of the frame t5 supports a bracket member I3 adapted to be adjusted longitudinally of said .body portion and frame in direction toward and away from said extension portion vH of the frame. Moreex-plicitly, said bracket member 18 includes a base portion 19 thereof .slidably movable over an adjacent surface .20 :of the body :portion t8 of the frame -I 5., and oppositely disposed tflange portions .2 2, 2i thereof slidably movable over surfaces 22, .22 of said :body portion I6 which are opposite said base portion IQ'and said surface 243. Stated otherwise, the oppositely disposed flange portions 2|, 2| are spaced from the base portion 49, as

well as from each other, and extend inwardly in parallel relation to said base portion [9, to provide oppositely disposed. guideways .23 23 of the bracket member t8 extending longitudinally of the body portion 116 in which the opposite side edge portions 2 4, 24 of said body portion iii are snugly, but slidably, situated. That is, the bracket member I8 is adapted to be adjusted lengthwise of the body (portion Hi by slidable movement of said bracket member l8 and its oppositely disposed guideways 23, :23 along the opposite side edge portions 25, 2d of said body tion, at distance closer to or farther fromihe extension portion I1.

As disclosed, the bracket member I8 includes an integral arm 25 disposed perpendicularly to the base portion l9 of said bracket member and situated adjacent the end portion 26 of the body I 25, and an end portion 29 of said adjusting screw 21 is threadably mounted, as at 30, in said end portion 26 of the body portion I6; A slot 3| insaid body portion I6 at the side of the end portion 26 opposite the arm 25 provides clearance for longitudinal movement of the adjusting screw 21, as will be evident. Said adjusting screw 21 is arranged perpendicularly to said arm 25 and parallelly of, or in alinement with, the body portion I6, and the end portion of the adjusting screw 21 which is opposite the threaded end portion 29 fixedly supports a finger piece 32 through the instrumentality of which said adjusting screw can be rotated, thus to accomplish adjustment of the bracket member I8 longitudinally of the frame and its body portion I6, toward and away from the extension portion II. Clearly, by turning the adjusting screw 21 in one direction, it will be caused to move inwardly of the body portion I6, thus to cause the bracket member I8 to be adjusted in direction toward the extension portion I1, and by turning said adjusting screw in opposite direction, it will be caused to move outwardly of said body portion I6, thus to cause said bracket member I81 to be adjusted in direction away from said extension portion I'I. Obviously, the bracket member I8 will be secured in fixed relation to the frame I5 at any location along the length of the body portion I6 of said frame to which said bracket member may be adjusted.

The base portion I9 of the bracket member I8 supports a carriage 33 adapted to be reciprocated upon said base portion in direction transversely of the frame I5 and its body portion I6 and perpendicular to the direction in which said bracket member I8 is adjustable along said body portion I6. That is, the carriage 33 is reciprocable in a plane which extends trans v'ersely of the body portion I6 and also is perpendicular to the plane in which the bracket member is adjustable along said body portion I6. More explicitly, said carriage 33 includes a base portion 34 thereof slidably movable over an adjacent surface 35 of the base portion I9 of said bracket member I8, and oppositely disposed, oblique or bevel flange portions 36, 36 thereof slidably movable over oblique bevel surfaces 31, 37 of said base portion I9 which are opposite said base portion 34 and said surface 35. Stated otherwise, the oppositely disposed, oblique or bevel flange portions 36, 36 are spaced from the base portion 34, as well as from each other, and extend inwardly in oblique or bevel relation to said base portion 34, to provide oppositely disposed guideways 38, 38 of the carriage 33 extending transversely of the body portion I6 in which the opposite, upper and lower as disclosed in Fig. 3, side edge portions 39, 39 of the base portion IQ of the bracket member I8 are snugly, but slidably situated. That is, the carriage 33 is adapted to be reciprocated transversely, or in sidewise direction, of the body portion I6 by slidable movement of said carriage 33 and its oppositely disposed guideways 38, 38 along the opposite side edge portions 39, 39 of said base portion IQ of the bracket member I8.

The carriage 33 supports, or includes, several, or a number of, parts of the grinding machine presently to be described, and mechanism is included for accomplishing reciprocation of said carriage, together with the parts supported, or included, thereby, upon the base portion I9 of said bracket member I8.

As disclosed, the carriage 33 rigidly supports an electric motor 48 at the side of said carriage opposite the extension portion I1, and said electric motor includes a driven shaft 4| at the extension portion II side of the motor which extends through and across a gear box 42 of or provided by the carriage, in direction parallel with a part of the extension portion I1 and toward another part of said extension portion, as well as parallel with the body portion I6 of the frame I5. The motor shaft 4| includes an inner end portion thereof suitably and conveniently mounted, as at 43, within the gear box 42, an intermediate portion thereof suitably and conveniently mounted, as at 44, in a bearing member 45 supported by said gear box, and an outer end portion thereof, at the outer side of said bearing member 45, suitably and replaceably, fixedly supporting a grinding disc 46. The construction and arrangement is such that the motor shaft 4| and the grinding disc 46 thereon are rotatable relatively to the carriage 33 and the electric motor 40, but are fixed against other movement with respect to said carriage and electric motor, and during reciprocatory movement, as well as movement of adjustment, of the carriage 33, the electric motor 40, together with its shaft 4|, the grinding disc 46 rigid with said shaft, and other parts supported by said carriage, moves with the carriage as a unit.

A worm 4'| fixed upon the motor shaft 4| and situated within the gear box 42 meshes with a worm wheel 48 fixed upon a spindle 49 rotatably mounted in spaced bearings 50, 50 suitably fixed upon a cover 5| for the gear box 42. The cover 5| is removably fastened upon the gear box 42 by screw bolts 52. As shown, the worm wheel 48 is arranged between the bearings 53, 50, and an extension portion 53 of said spindle 49 fixedly supports a worm 54 which meshes with a gear 55 fixed upon a shaft 56 rotatably mounted in said cover 5|. A pinion 51 is fixed upon said shaft 56 and is situated at the inner side of the gear 55.

A stub shaft 58, disposed perpendicularly to the cover 5|, as well as to the body portion I6 of the frame I5, extends through the gear box 42. An outer or rearwardend portion of said stub shaft 58 is rotatably mounted, as at 59, in said cover 5|, and an inner or forward end portion of the stub shaft is rotatably mounted, as at 66, in a wall of the gear box 42 constituted as a part of the carriage 33. The outer or rearward end of the stub shaft 58 fixedly carries a hand piece 6|, situated at the outside of said gear box 42, through the instrumentality of which said stub shaft can be manually rotated, and the inner or forward end of the stub shaft fixedly supports a crank 62 which also is situated at the outside of the gear box.

A gear 63 is splined, as at 64, to the stub shaft 58 to rotate with said stub shaft and to be movable longitudinally thereon, either to be brought into meshing relation with the pinion 51, or to be removed from engagement with said pinion.

A gear shifter device is for accomplishing longitudinal movement of the gear 63 upon said stub shaft 58, selectively to cause said gear 63 to be engaged with the pinion 51 or to be removed from engaging relation with said pinion. Said gear shifter device includes a shifter rod 65 which is mounted, as at 66, in the cover 5| for longitudinal sliding movement. Said shifter rod 65 fixedly supports a finger piece 61 upon its outer or rearward end to be manipulated to accoms plish longitudinal adjustment of the shifter rod, and also fixedly supports a shifter arm 68 upon its inner or forward end. The shifter arm 68 includes a fork portion 69 thereof which lies between spaced annular elements l0, 10, upon the stub shaft 58 and rigid with the gear 63. The construction and arrangement is such that the annular elements 10, 10 are rotatable with the gear 63 and the stub shaft 58 when these are rotated, and relatively to the shifter arm 68 and its fork portion 69, as will be understood. It will be obvious that when the shifter rod 65 is in withdrawn position, as in full lines in Fig. 7, the gear 63 is in meshing relation to the pinion 51, and when said shifter rod is in inserted position, as in dotted lines in said Fig. '7, said gear 63 is removed from said pinion 51.

In Fig. 8 of the drawings the shifter rod 65 is disclosed positioned as in full lines in Fig. 7, with the pinion 51 and the gear 63 in interengaging relation. As shown in said Fig. 8, a ball 89 is resiliently pressed by a coil spring 90 into an annular slot 9! of said shifter rod to insure that said pinion 51 and gear 63 will not become accidentally disengaged. The construction and arrangement is such that the shifter rod readily can be slid or moved from its position as in Fig. 8 to its position as in Fig. 9 when this is intentional. In said Fig. 9 said shifter rod is disclosed positioned as in dotted lines in Fig. 7, with the pinion and the gear 63 removed from each other, and the spring pressed ball 89 removed from the annular slot 9 I, above said annular slot.

The crank 62 is adjustably secured to one end portion'll of a connector rod 12 which is freely situated within a clearance passageway 13 extending through the base portion l9 of the bracket member l8 in direction transversely of the body portion 16 of the frame [5. Said connector rod 72 projects beyond both ends of the clearance passageway 73, and is itself substantially perpendicular to said body portion I6, as well as disposed between and substantially parallel with the oppositely disposed guideways 38, 38. An end portion 14 of the connector rod 12 which is opposite said end portion H is pivotally secured, as at 15, to an outer portion 16 upon the base portion [9 at the side of said base portion opposite said crank 62.

The adjustable connection between the crank 62 and the end portion H of the connector rod 72 is of construction to provide for alteration of the effective radius or throw of said crank. More explicitly, the crank 62 is constituted as a channelled member having an annular flange Tl upon, perpendicular to and integral with an intermediate portion of the base thereof and rigidly secured upon the adjacent end of the stub shaft 58 in such manner that said annular flange 11 is in contiguous or adjacent relation to a part of the carriage 33. See Fig. 5.

Said channelled member which constitutes said crank 62 additionally includes spaced apart, oppositely disposed, parallel side wall portions I8, '18 thereof integral with the base of said channelled member and disposed at the .side of said base opposite the annular flange H, as well as spaced apart, oppositely disposed, alining, inwardly extending flange portions 19, 19 thereof which are integral with the edge portions of said side wall portions 78, 18 opposite the base of the channelled member. The base, side wall portions l8, l8 and inwardly extending flange portions 19, 19 of said channelled member together provide an elongated guide slot 80 within the channelled member, as well as an elongated guid slot 8| of said channelled member between the edges of the flange portions l9, 79, of width narrower than the elongated guide slot 80, and said flangeportions 19, 19 provide longitudinally extending shoulders 82, '82 disposed at the side of the elongated guide slot adjacent the elongated guide slot 8| and to the rear or back of said elongated guide slot 8|.

A connector pin includes a head 63 thereof slidably situated within the elongated guide slot 80 in contiguous relation to the base, side wall portions 18, 18 and longitudinally extending shoulders 82, 82 of the channelled member, and an elongated body portion 84 thereof situated within and extending outwardly beyond the elongated guide slot 8| in spaced relation to the inwardly extending flange portions 19, 19. A rectilinear block is snugly arranged upon the elongated body 84 of the connector pin, normally in engagement with the head 83 of said pin, to be movable longitudinally of the pin, and is slidably situated within the elongated guide slot 8| in contiguous relation to the adjacent edges of said inwardly extending flange portions l9, 79. A portion of the body 84 of the connector pin which is at the side of the block 85 opposite the head 83 is rotatably mounted, as at B6, in the end portion H of the connector rod 12, and a nut 8'! upon the end of said body 84 opposite said head 83, assisted by Washers 88, 86 upon the connector pin and between the connector rod and the block and the connector rod and the nut, respectively, retains the parts in proper assembled relation. Clearly, by loosening adjustment of the nut 81, the connector pin and the block can be adjustably slid to any desired position along the channelled member, closer to or farther from the axis for the stub shaft 58, thus to adjust the radius or throw of the crank 62, and by tightening adjustment of said nut 81, said connector pin and block can be securely locked at any position along said channelled member to which the connector pin and block may be adjusted in a particular instance. With adjust-v ment of said connector pin and block in direction away from the axis for said stub shaft 58 the radius or throw of the crank is of course made greater, and vice versa.

Assuming the frame I 5 to be supported in some manner, and the pinion 51 and the gear 63 to be interengaged, it will be evident that energization of the electric motor 46 will not only cause the motor shaft 4i, and with it the grinding disc 46, to be rotated, but also will cause the carriage 33, and the parts supported or included by said carriage, to be reciprocated in direction transversely of the body portion N3 of said frame. That is, the carriage 33, the motor 40 with driven shaft 4| and grinding disc 46, etc., will be reciprocated along the base portion IQ of the bracket member l8 in response to rotation of the motor shaft through the instrumentality of the worm 41, the worm wheel 48, the spindle 49, the worm 54, the gear 55, the shaft 56, the pinion 51, the gear 63, the stub shaft 58, the crank 62, the connector pin and the connector rod 12. Obviously, rotational movement of said crank, produced by rotational movement of the stub shaft 58, will cause said stub shaft, with the carriage, etc., to be moved to and from, or reciprocated. More explicitly, movement of rotation imparted to the crank 62' will cause'the stub shaft58 and the carriage 33, etc., to have tendency toward rotational movement, or movement in a circular path, about the connector pin and its axis 86 upon the connector rod I2, which rotational movement, or movement in a circular path, of course will be resisted because of the fact said carriage is mounted upon the bracket member I8 to be capable of having only reciprocatory movement. Instead, rotation of the crank 62 will cause the connector rod I2 to oscillate upon its axis I5, the elongated body 84 of the connector pin to rotate in its bearing at 86, and the stub shaft, carriage, etc., uniformly to be reciprocated, in direction longitudinally of the connector rod I2 and transversely of the body portion I 6 of the frame I5, alternately toward and to either side of said connector pin, adjacent and opposite the pivotal connection I5. Evidently, when the gear 63 is removed from engagement with the pinion 51, the electric motor 40 will be rendered incapable of causing the carriage, etc., to be reoiprocated or moved transversely of the body portion I6 of the frame I5. When the driving connection between the motor and crank 62 is broken, by disengagement of the pinion 51 and the gear 63, said crank can be rotated to cause the carriage to be moved transversely, or reciprocated, by manual rotation of the stub shaft 58 through the instrumentality of the hand piece 6| upon said stub shaft.

The extension portion ll of the frame I is more especially for the purpose of associating the grinding machine with, or assembling said grinding machine upon, work to be performed. More explicitly, said extension portion I'I includes a straight length 92 thereof in adjacent relation to the body portion I6 of said frame I5, and a partcircular length 93 thereof at the end of said straight length 92 which is opposite or spaced from said body portion I0. The part-circular length 93 of the extension portion II provides an internal part-cylindrical surface 94 of said partcircular length 93 which is arranged in a circumference spaced a slight distance from the grinding disc 46, and the axis for the motor shaft 4| is disposed diametrically of said mentioned circumference. A part-circular element 95 pivoted, as at 90, upon the end portion of the partcircular length 93 which is opposite or spaced from the straight length 92 of said extension portion I! provides an internal part-cylindrical surface 9'I which in effect is adapted to constitute a continuation of said internal part-cylindrical surface 94. That is, the internal part- cylindrical surfaces 94 and 97 are adapted to lie in a single circumferential surface when the grinding machine is applied to work to be performed. A straight portion 98 of the part-circular element 95 which is opposite or spaced from the partcircular length 93 is spaced from and substantially parallel with the straight length 92 of the extension portion II when the grinding machine is applied to use, and the bearing member 45, the motor shaft M and the grinding disc 46 upon said motor shaft, are situated between and in spaced relation to said straight portion 90 and said straight length 92.

The part-circular length 93 supports each of a pair of spaced apart blocks 99 and I00 situated at and adjacent to the internal part-cylindrical surface 94, and the part-circular element 9-5 supports a block I9I situated at and adjacent to the internal part-cylindrical surface 91, between said part-circular element 95 and the straight portion 98 as disclosed. The blocks 99, I00 and MI are spaced at substantially degrees apart, and said block 99 is spaced approximately degrees from the grinding disc 46. Each of the blocks 99, I00 and IOI is imbedded in the member which support the block, and is secured to said member in any suitable and convenient manner, as by a small screw bolt I02.

Each of the blocks 99, I00 and IOI supports a pair of alined small shafts I03, including a shaft I03 mounted in the corresponding block at each side thereof and slidably adjustable inwardly and outwardly of said block. Means as disclosed for fastening each small shaft I03 at any position to which it may be adjusted in the corresponding block, either farther inwardly or farther outwardly of said block, is constituted as a locking screw I04 situated in the block and adapted to be turned into clamping engagement with the corresponding small shaft. The outer end of each small shaft I03 rotatably carries a roller I05, and the set of rollers I 05 at each side, respectively, of the blocks 99, I00 and IOI are adapted to lie in a single circumferential or cylindrical surface which is normal to the motor shaft M and the grinding disc 46 fixed upon said motor shaft when the grinding machine is in operation upon a job to be performed. The outer, working surface of said grinding disc 46 lies at the circumferential or cylindrical surface in which the rollers I05 are situated. The outer end portion of each roller I05 is of reduced configuration as disclosed.

The sets of rollers I05 at the opposite sides, respectively, of the blocks 99, I00 and IM are adapted to be supported upon, or engaged with, a member or journal, such as a connecting rod journal or a main journal of a crank shaft, to be ground, thus to cause the grinding disc 46 to be situated, or retained, in proper grinding relation to said member or journal. The part-circular element 95 is pivotally supported upon the partcircular length 93 of the extension portion II in order that the grinding machine readily and easily can be associated with or assembled upon, and removed from, a member or journal to be ground. Said part-circular element 95 is retained in relation to the part-circular length 93 so that all of the rollers I 05 desirably will lie in a single circumferential or cylindrical surface normal to the grinding disc 46, when the grinding machine is in operation, through the instrumentality of a flat spring I06 having one of its ends secured, as at I01, to the end of the straight portion 98 opposite or spaced from the part-circular length 93 and its other end portion removablv retained against movement in direction away from the straight length 92 by a hoop member I08 pivotally supported, as at I09, upon the frame I5. Said fiat spring I06 includes a hook portion I I0 thereof for detachably engaging said hoop member I 08. Clearly, by disengagement of the hook portion I I0 from the hoop member I08, the flat spring I06 and the part-circular element 95 and its straight portion 99 can be swung in direction away from the extension portion H to allow access to the space within the part-circular length 93 and adjacent the outer, working surface of the grinding disc 49, and by engagement of said hook portion I I0 with said hoop member I08, the rollers I95 supported by the block IOI canbe retained in the same circumferential or cylindrical surface which includes the rollers I05 supported by the blocks 99 and I00, which circumferential or cylindrical surface will be normal to the grinding disc 46,

A handle H I. for the grinding machine: is, as disclosed, removably' secured, as at. H2, to. the end portion 26 of the-bodyportion iii of the frame l5, which end portion is opposite or spaced from the extension portion II.

In Fig. 1 of the drawings, the grinding machine is illustrated as when applied to the. connecting rod journal i l 3 of a crank shaft I 14 to cause said connecting rod journal to be ground. The grinding operation can be accomplished upon a connecting rod journal while the main journals H of the crank shaft are mounted in an automotive vehicle. Attention is called to the fact that not only are all of the rollers Hi5 engaged with the connecting rod journal H3 in Fig. 1, to support the grinding machine directly upon said connecting rod journal-as also shown in Figs. 2 and 3but, also, in said Fig. 1 the rollers I55 of the opposite sets of rollers have been adjusted so that the outer ends or portions of said rollers are in engagement with the spaced apart crank arms H6, H6, respectively, at the opposite ends of and supporting the connecting rod journal, thus to fix the frame l5 against possibility of endwise or longitudinal movement relatively to the work or connecting rod journal during operation of the grinding machine. That is, the rollers I05 situate said frame l5 against the possibility of sidewise or transverse movement of the frame.

In Fig. 1 the connecting rod journal H3 may be rotated, as well as moved in a circular path, by rotation in any suitable and convenient manner of the crank shaft H4 upon its main journals H5. In such event, the frame l5 and all parts of the grinding machine, suspended or supported upon the connecting rod journal through the in strumentality of the rollers I05, will be moved to and fro, or upwardly and downwardly, and sidewise with the connecting rod journal as this is moved in a circular path about the main journals H5, and said connecting rod journal will, at the same time, be rotated relatively to said rollers I55 and the grinding disc 46. That is, the grinding machine will be moved to and fro and sidewise in response to movement in a circular path of the connecting rod journal H3, and said connecting rod journal also will be rotated within and relatively to the grinding machine. The handle HI may be manually grasped, when this is preferred, during to and fro and sidewise movements imparted to the grinding machine by movement in a circular path of the connecting rod journal H3, thus to cause said grinding machine to be steadied.

The grinding machine can be employed to operate upon a member or journal other than a connecting rod journal such as H3, as, for example, a, main journal such as H5. A crank shaft such as I I4 having a main journal such as H5 to be ground or operated upon by the grinding machine herein presented will be removed from the automotive vehicle and suitably and conveniently mounted so that the main journal to be worked upon can be rotated. The grinding machine will be suspended or supported upon and fixed against endwise or longitudinal movement relatively to said main journal in the general manner as set forth in connection with the connecting rod journal H3, but a main journal being ground need merely be rotated in the grinding machine and relatively to the rollers Hi5 and the grinding disc 46, and not caused to be moved in a circular path as is a connecting rod journal operated upon while its crank shaft is mounted'inan automotive vehiele.

' The operation of the. grinding machine itself is substantially the same when said machine is causing-a connecting rod journal. such as I I3 to be ground as when the machine is causing a main journal such as H5 to be ground. In either instance, said grinding machine. desirably is suspended or supported upon the journal being ground .by rollers such as I05. which constitute work followers, locators and/or guides of or for the grinding machine. And, too, the rollers such as. 35 additionallyare employed to fix. the frame such as E5 of the. machine against movement endwise or longitudinally of the journal being worked upon and sidewise or transversely of said frame. In the instance of either a connecting rod journal or a main journal, or other member or journal, being operated upon, the; grinding disc 46 is rotated and the carriage 33, with appurtenances, including said grinding disc, is reciprocated, in the manner as hereinbefore set forth, responsively to energization of the electric. motor 40.. The grinding disc while rotating, desirably at relatively high speed, is caused to be moved, or recip rocated, evenly and smoothly, and desirably slowly, endwise or longitudinally of the member or journal being ground, thus to operate upon said member or journal. Of course, the radius or throw of the crank 62 will be made such that the grinding disc 43 will operate upon a member or journal being ground throughout the whole of the length of the member or journal, or along any part of the length of said member or'journal selected to be ground, as will be understood. Obviously, the adjusting screw or member 21 constitutes a feed screw or member of the grinding machine for situating the bracketmember l8 and the carriage 33 with appurtenances closer to or farther from-a member or journal being operated upon, thus to cause the disc 46 to be set at desired and predetermined grinding relation to said member or journal.

Preferably, the rollers I55 and the small shafts I03 which support said rollers will be. removable from the blocks 99, I00, [01, to be replaceable by equivalent small shafts carrying equivalent rollers of larger or smaller diameter. That is, in the instance of journals of larger diameter to be ground, rollers such as H15 of smaller diameter desirably will be employed, and in the instance of journals of smaller diameter to be ground, rollers such as I05 of larger diameter desirably will be employed. Obviously, in'every case the rollers I are adapted to cause a journal to-be ground to be situated in exact perpendicular relation to the grinding disc so that the outer or grinding surface of said grinding disc will operate properly upon said journal.

The electric motor 45 can be energized by power from any suitable and convenient source (not shown). Lead wires H1 will extend to said electric motor from the source of power selected, and, as disclosed, a start and stop switch H8 for the electric motor is assembled with said lead wires at location conveniently close to the grinding machine.

What is claimed is:

1. In a machine for grinding a rotating journal,

'with said motor shaft and adapted to be operative upon said journal, means actuated by said motor shaft for causing said carriage to be reciprocated relatively to said bracket member, means for adjusting the length of the reciprocations of said .carriage, and means for adjusting said bracket member with said carriage, motor, motor shaft and grinding entity toward and away from said journal.

2. In a machine for grinding a rotating journal, a support, means for mounting said support upon said journal, a carriage mounted upon said support for reciprocatory movement endwise of said journal, a motor rigid with said carriage, a motor shaft, a grinding entity rigid with said motor shaft and adapted to be operative upon said journal, means actuated by said motor shaft for causing said carriage to be reciprocated, and means for directing reciprocation of said carriage to a straight path.

3. In a machine for grinding a journal, a support, means for mounting said support upon said journal, a carriage mounted upon said support for reciprocatory movement longitudinally of the journal, means for directing reciprocation of said carriage to a straight path, a motor rigid with said carriage, a motor shaft, a grinding entity rigid with said motor shaft and adapted to be operative upon said journal, means actuated from said motor shaft for causing said carriage to be reciprocated, and means for adjusting said carriage with said grinding entity toward and away from said journal.

4. In a machine for grinding a journal, a frame, a bracket member mounted upon said frame for adjustment toward and away from said journal, a carriage mounted upon said bracket member for reciprocatory movement longitudinally of said journal, a motor rigid with said carriage, a shaft adapted to be rotated by said motor, a grinding entity adapted to be driven by said shaft and to be operative upon said journal, means operative in response to rotational movement imparted to said shaft by said motor for causing said carriage to be reciprocated relatively to said bracket member, means for direct ing reciprocation of said carriage to a straight path, and means for adjusting said bracket member with carriage in direction toward and away from said journal.

'. In a machine for grinding a journal, a support, a carriage mounted upon said support for reciprocatory movement longitudinally of said journal, a motor rigid with said carriage, a shaft adapted to be rotated by said motor, a grinding entity adapted to be driven by said shaft to be operative upon said journal, means operative in response to rotational movement of said shaft for causing said carriage to be reciprocated, means for directing reciprocation of said carriage to a straight path, and means for altering the length of the reciprocations of said carriage.

6. In a machine for grinding a rotating jour nal, a frame, means for mounting said frame upon said journal, a bracket member mounted upon said frame for adjustment toward and away from said journal, a carriage mounted upon said bracket member for reciprocatory movement longitudinally of said journal, a motor rigid with said carriage, a motor shaft, a grinding entity rigid with said motor shaft and adapted to be operative upon said journal, means actuated by said motor shaft for causing said carriage to be reciprocated relatively to said bracket member, means for directing reciprocation of said carriage to a straight path, and means for adjusting said bracket member with carriage, motor, motor shaft and grinding entity toward and away from said journal.

7. In a machine for grinding a rotating journal, a frame, means including spaced apart rollers for supporting said frame upon said journal, means for fixing the frame against endwise movement relatively to the journal, a bracket member mounted upon said frame for adjustment toward and away from said journal, a carriage mounted upon said bracket member for reciprocatory movement longitudinally of said journal, a motor rigid with said carriage, a shaft rigid with said carriage and adapted to be rotated by said motor, a grinding entity fixed upon said shaft and adapted to operation upon said journal, means actuated in response to rotational movement of said shaft for causing said carriage to be reciprocated, means for directing reciprocation 'of said carriage to a straight path, and means for adjusting said bracket member with said carriage, motor, shaft and grinding entity toward and away from said journal.

HANS PETERSEN.

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