US2059437A

US2059437A - Work holding machine

Info

Publication number: US2059437A
Application number: US723624A
Authority: US
Inventors: Gustave A Carlson
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-05-03
Filing date: 1934-05-03
Publication date: 1936-11-03
Anticipated expiration: 1953-11-03

Description

Nov. 3, 1936. e. A. CARLSON WORK HOLDING MACHINE 3 Sheets-Sheet 1 Filed May 5, 1934 INVENTOR. WM a. m BY 1) (I Z/ ATTORNEY.

Nov. 3, 1936. s. A. CARLSON WORK HOLDING MACHINE Filed May a, 1954 5 Sheets-Sheet 2 INVENTOR.

ATTORNEY.

Nov. 3, 1936, G. A. CARLSON WORK HOLDING MACHINE Filed May 3, 1934 5 SheetsSheet 3 m BY W Patented Nov. 3, 1936 UNITED T OFFICE 34 Claims.

My invention relates to improvements in machines for holding work in contact with a grinding, polishing, or buffing member; and the objects of my improvements are, first, to provide a work holding machine in which the work may be rotated and reciprocated while in contact with a grinding or similar member to permit irregular surfaces of the work to be finished by the grinding member; second, to provide a work holding machine having a pair of slide members operatively connected by a toggle mechanism for operating one of the slide members; third, to provide a slide member supporting a rotatably mounted structure for holding and actuating the work in its grinding movements and with dwell portions in the movement; fourth, to provide a work holding machine having a slide member and a rotatably mountedstructure providing means for retaining an anti-friction bearing mechanism for supporting the structure in its rotating movement; fifth, to provide a work holding machine with a rotatably mounted structure for holding the work and opposed in its rotating movement by resilient means to enable a grinding or similar member to remove a uniform amount only of material from an irregular surface of the work; sixth, to provide a rotatably mounted structure, for holding work to be finished, with a plurality of means for moving the structure in a horizontal direction; seventh, to provide a work holding machine having a rotating structure with means for adjusting a portion of the structure to angular positions relative to the axis of the rotatably mounted structure; eighth, to provide a work holding machine having a housing forming a crank arm for supporting a cam follower with means for adjusting the position of the cam follower to provide different effective lengths of the crank arm; and ninth, to provide a rotatably mounted structure with means for locking the structure from rotating, the locking means being adapted to be maintained in. a non-locking position to permit the rotating movement of the structure.

I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure l is a front view of the work holding machine; Fig. 2, a side View of the work holding machine disclosed in Fig. 1; Fig. 3, a rear view of the work holding machine disclosed in Fig. 1; Fig. 4, a sectional view of the work holding machine taken on the line 3- 5, Fig. 2; Fig. 5, a sectional view of the work holding machine taken on the line 5-4), Fig. 3; Fig. 6, a sectional View of the work holding machine taken on the line 6-6, Fig.

1; Fig. 7, a partial side View of that portion of the work holding machine disclosed in Fig. 6, Fig. 7 also disclosing a partial section of the rotatably mounted structure of the work holding machine; Fig. 8, a partial sectional view of a skillet and a grinding member in its operative position relative to the skillet and to the work holding machine; Fig. 9, a plan View of the crank arm housing and its cam follower mechanism; Fig. 10, a side View of the crank arm housing and its cam follower disclosed in Fig. 9; Fig. 11, an end view of the crank arm housing and its cam follower disclosed in Fig. 10; and Fig. 12, a vertical section through the lever mechanism for locking the retatably mounted structure.

The work holding machine is provided with the base I which has the flange 2 for resting on the floor H! or similar supporting structure. The housing 3 is constructed with the flange 4 adapted to be secured to the upper surface of the base or bed structure I by means of the screws 5, the housing 3 being provided with the bore 6 for receiving the stud portion l of the second bed or supporting structure 8, the collar 9 being rotatably mounted on the stud portion 7 of the bed 8 and is utilized for raising the bed 8 upwardly to various adjusted positions by the operation of turning or rotating the collar 9 on the threads of the stud portion 'l, the collar 9 being suitably provided with bosses I!) in which are provided holes I I for receiving a bar for facilitating the rotation of the collar 9 in its adjusting operation. The collar 9 is disclosed in Figs. 1, 2, and 3 in its lowermost position in which the lower surface of the collar 9 is resting upon the upper surface of the housing 3.

The housing 3 may be provided with a slot l2 in one of its sides, the slot l2 extending through the clamp portion E3 in which is suitably mounted the clamp screw it which provides means for clamping the stud portion t of the bed 8 securely in the housing 3 after the bed 8 has been operatively adjusted to a selected height or position.

The bed 8 is provided with the slide-way I5 or Vs, in which is slidably mounted the slide it, the gib l "i being suitably mounted between the slideway l5 and the slide M3 for adjustment purposes, the gib I! being secured by the screws E8.

The slide I6 is actuated in its sliding movement in the slideway l5 by means of the shaft H) which is revolvably mounted in the slide l6 and threadably engages. the boss 20 of the bed 8, the wheel 2! provided with the handle 22 being suitably mounted at the outer end of the shaft H). The slide [6 may be constructed with a slide I6 is provided with the slideway 24 or Vs in which is slidably mounted the double slide 25' which is provided with V-shaped extensions on both its lower and upper side for respectively engaging the slideway 24 in the slide I5 and the slideway 26 in the table or slide 2'l. The gib 28 will be maintained in its adjusted position between the lower V of the double slide 25 and the slideway 24 of the slide "5 by the screws 29. The gib 30 will be maintained in its adjusted position between the upper V of the double slide 25 and the slideway 26 of the table 21 by the screws 3|.

The shaft 32 is revolvably supported in the extension portion 33 of the double slide 25 and threadably engages the boss 34 which is suitably mounted and connected with the slide IS, the double slide 25 being suitably provided with a recess portion 35 to provide operating clearance around the shaft 32 and the boss 34, the wheel 36 being suitably mounted on the shaft 32 and provided with the handle 31. It will thus be seen that the double slide 25 may be actuated in its sliding movement by means of the wheel 36 and the shaft 32.

The table 21 of the double slide 25 is provided with the boss 38 in which is pivotally connected the link 39 by means of the pin 40, the link 39 being further pivotally connected to the lever 4| by means of the pin 42. The lever 4| is pivotally supported in the boss 43 by the pin 44, the boss 43 being constructed integrally with or suitably connected with the extension portion 33 of the double slide 25.

It is to be noted that the table 2'! is not only adapted to be moved together with the double slide 25 by the shaft 32 and the wheel 35 but is also adapted to be actuated in a slidable movement on its slideway 25 longitudinally of the double slide 25 by means of the lever 4| and its toggle member.

It is to be noted that the lever 4| and the link 39 will form a, toggle mechanism which may be operatively actuated to provide a, high leverage for moving the work toward and in engagement with the grinding wheel or similar member ||8 as hereinafter disclosed, the toggle mechanism further providing for quickly moving the work away from the grinding wheel 8 and to return a piece of work from its position of engagement with the grinding wheel ||8 without disturbing the position of the grinding wheel or similar member and its supporting structure, this being more particularly set out hereinafter.

It is to be noted that Fig. 7 discloses the lever 4| and the link 39 in a position corresponding to a position in which the table 21 has been removed to a position corresponding to that in which the work has been moved away from the grinding wheel ||8 as hereinafter disclosed and Fig. 1 discloses the lever 4| and the link 39 in a position corresponding to a position corresponding to that in which the work is engaging the grinding wheel 8 as hereinafter disclosed.

The lever 4| will be provided with the offset portions 45 which provides operating clearance over the structure of the work holding machine when the lever 4| is moved to a forward position as disclosed in Fig. l, the offset portion 45 of the lever 4| being provided with a handle 46.

The table 21 is provided with the lower retainer or table portion 41 which is provided with the bore 48 in which is suitably mounted the lower race member 49 of the bearing assembly A. The

upper retainer or table portion 5|! of the bearing assembly A is provided with the bore 5| in which is suitably mounted the upper race member 52. The lower race member 49 and the upper race member 52 are each provided with circular grooves or raceways 53 in which rollably operate the balls 54, the balls 54 thus supporting and spacing the upper retainer member 55 on and from the lower retainer member 41, said upper and

lower retainer members

41 and 58 being separated by the operating space 55.

The balls 54 are suitably mounted in the retainer member 55 which thus locates and maintains the balls 54 in their operative positions, the retainer member 56 being suitably mounted between the

race members

49 and 52 in a position in alignment and providing the operating space 55.

It is to be noted that the upper retainer member 50 is thus rotatably supported concentrically with the lower retainer member 41, said

retainer members

41 and 50 forming the outer members of the bearing assembly A thus forming an anti-friction means for supporting the retainer member 50 and the structure supported thereon as hereinafter disclosed.

The bracket 51 is secured to the upper surface of the upper retainer member 56 by means of the screws 58 which extend through the slots 59 in the bracket 51, the screws 58 threadably engaging the upper retainer member 5|], the slots 59 being radially disposed about the axis of the upper retainer member 55 to permit of adjusting the bracket 51, together with its supported mechanism radially on the upper retainer member 50. The bracket 5'! has upturned flanges 60 oppositely disposed about the axis of the upper retainer member 50 and each provided with a slot 6| each radially disposed about one of the screws 52 which are used for securing the flanges 63 of the housing 64 to the upturned flanges 60 of the bracket 51'. The screws 65 extend through the slots 5| and threadably engage the upturned flanges 60 of the bracket 57.

It will thus be noted that the housing 64 and its supported structure may be pivotally moved about the screws 62 to provide various positions of angular adjustment for the housing 64 and its supported structure relative to the vertical axis of the retainer member 55, the screws 65 being utilized to lock the housing 54 in its adjusted position, the housing 84 being pivotally movable due to the slot 5| through which extend the screws 65.

The housing 64 is provided with the Vs or ways 55 which are slidably engaged by the slideways or Vs 51 of the housing 53 which is thus slidably mounted on the housing 54.

The gib 59 is provided for maintaining adjustment between the Vs El and the ways 66, the gib 69 being maintained in its adjusted position by the screws 15.

The housing 64 has oppositely disposed and upturned flanges H to which is secured the cam plate 12, the upper ends of the upturned flanges being mortised in the cam plate 12, the cam plate l2 being secured by the screws 13. The cam plate 72 is provided with the cam or cam slot 14, as disclosed in Fig. 5, which is operatively engaged by the cam follower 15. The cam follower I5 is mounted and secured in the arm or housing 76 which acts as a crank relative to the axis of the shaft T! to which it is suitably secured by means of the hub 18 of the housing 16, the hub 18 fitting over the end of the shaft 11,

the hub l8 being provided with the keyway 19 which engages a key suitably mounted in the shaft H, the hub 18 together with its housing assembly '26 being secured on the shaft Ti by the set screw 89 which engages the threaded hole 8| in the hub It.

It is to be noted that the cam slot M may be constructed with suitable shapes so that when the shaft ll together with the housing l6 and the cam follower l5 are revolved around the axis of the shaft N as hereinafter disclosed, the operative engagement of the cam follower '25 with the cam slot M will cause the housing 58 to hesitate in its slidable movement on the vs 66 at one end of its stroke or slidable movement on the vs 66 while the spindle I28, together with its chuck H4 and the work held therein, makes a number of revolutions and permitting the grinding or similar member M8 to sufficiently contact the side or surface N6 of the skillet I E3 or similar work, to hesitate or dwell there sufficiently long enough to allow for one or more revolutions of the skillet H3, thus insuring the proper finishing of the surface lit.

The housing 63 is provided with oppositely disposed side walls 83 suitably connected with the lower portions of the housing 63 provided with the slideways fill, the walls 83 providing an open space or chamber 86 through which extends the cam plate 72, thus allowing the housing 68 to slidably operate with clearance space on each side of the cam plate 12 as required by the operation of the cam follower l5 and the cam slot 14. The housing 63 is further provided with the extension portion or housing 85, the base of which joins and extends between the walls 83 of the housing 68, the extension portion 85 being reinforced by the web portions 8t.

The extension portion 85 of the housing 68 is provided with the bore 8'! in which fits the pilot $38 of the housing 89, the extension portion 85 being suitably provided with the slot Si which permits the extension portion to be clamped around the pilot portion 88 of the housing 89 by means of the clamp screws 95, thus permitting the housing 89 and its cperatively supported mechanism to be rotatably moved to various adjusted positions to enable the grinding member to be located at an angle with the work to be finished, thus permitting the finishing of taper surfaces.

1e shaft ll is rotatably supported in a vertical position by the bearing assemblies 92 and 9-3 which are adapted for absorbing radial and thrust loads and are oppositely disposed about the worm gear 94 which is suitably mounted on the shaft ii and adapted to be rotatably driven therewith, the shaft H being further supported in the bearing assembly 95 which is suitably mounted in the pilot portion 88 of the housing 89, the bearing assembly 95 being also adapted to absorb both radial and thrust loads.

The shaft 96 is rotatably mounted in the bearing assemblies 9'7! which are suitably supported on the housing 89, the shaft 96 extending substantially at right angles to the shaft 2?, the shaft 9% being provided. with the worm gear 92 which is driven by the worm 99 which is suitably mounted on the shaft me.

The shaft lei together with the worm 539 are revolvably operated by means of the pulley llll which is suitably mounted on the shaft lull and is driven by the belt 582 which is in turn driven by, the pulley I013 suitably mountedon the "shaft lttof theelectric notor assembly I95 which is suitably connected to a source of electric power andthus provides power for revolvably operating the shafts 96 and it. The housing 89 is provided with the housing portion Hi6 and encloses the worm gear 98 and the worm 99, the housing portion 4% being suitably provided with the cover I01 retained by the screws m8.

The housing M39 is suitably supported by the housing portion Hi5 and the electric motor assembly I05 together with its shaft I94 and the shaft lilii of the housing I06 which encloses the belt IGZ together with the pulleys l9! and H33, the housing I03 being suitably provided with the cover H0 which is retained by the wing nut Ill suitably mounted on the stud H2, the cover llii being located by the four or suitable number of bosses I23 on the cover H0 and engaging inner surfaces of the housing I69. I

It is to be noted that my work holding machine is disclosed as being set up for grinding a skillet N3, the skillet H3 being disclosed as one of the various objects with irregular shaped surfaces or contours which may be finished in a very quick, efiicient and easy mannered way on my machine. The skillet H3 is retained in a chuck mechanism H4 which is similar to the chuck mechanism disclosed in my application for U. S. Letters Patent for Grinding machine, Serial No. 678,589, filed July 1, 1933.

The skillet H3 as disclosed in the drawings, and for which the work holding machine is particularly adapted to finish manufacture, is disclosed as having the inner bottom surfaces H5 and the inner flange surfaces H6 being finished, a grinding member H8 operating in conjunction with the work holding machine, the work holding machine being herein disclosed as being provided with the grinding unit wheel H8 which may be mounted on a separate frame structure suitably supported on the floor line H1, or it may be supported on a frame structure suitably attached and mounted on the structure shown in the work holding machine, said structure for supporting the grinding wheel l I8 not being disclosed as the particular means for supporting the grinding wheel H8 does not form a part of my invention, the grinding wheel being provided with the shaft E5! on which is secured the grinding wheel H8 by means of the nut 52 threadably engaging the portion I53.

The skillet H3 is constructed as by casting, with the lips or flared portions H9, which are used as a spout for pouring liquids from the skillet H3, the skillet H3 being further constructed with the handle I 20.

It is to be noted that for units such as the skillet H3, constructed as by casting in a mold of cast iron or similar materials it is imperative that the inner surfaces H5 and H6 be produced with a finished surface in the quickest possible time.

Figure 8 discloses a sectional portion of the skillet H3 together with the grinding wheel H8 located adjacent the radius or corner E2! of the skillet M3, the grinding wheel H8 thus being corner I2I and to finish the surface II6, the grinding wheel II 8 being thus adapted to grind the surface IIB as the skillet H3 is suitably and operatively moved with a hesitation or dwell as a result of the operative engagement of the cam follower I5 and the cam groove I4. The skillet I I3 is supported in the chuck I I4 which is mounted on the shaft 96 and adapted to revolve therewith, the chuck II4 being driven by the keys I25 which engage a suitable keyway in the hub I26 of the chuck I I4, the chuck I I4 being secured on the shaft 96 by the nut i2! which is threadably secured to the end of the shaft 96. The chuck H4 is provided with the recess I29 which is formed to engage and fit with the outside surfaces of the skillet II3, the chuck II4 being fur ther provided with the cutway portion, notch, or depression I38 for receiving the handle I20 of the skillet H3.

The chuck I I4 is further provided with suitable holes through which extend the bolts I3I which are suitably secured to the clamp members I32, the clamp members I32 being resiliently urged toward the outer surface of the chuck II4 by the springs I33 which are suitably retained on the bolts I3I, the springs I33 being suitably retained in recesses of the chuck I I4.

The clamp members I32 are each provided with suitable notches or recesses which permit the flared portion H9 of the skillet II3 to be inserted therethrough when the skillet H3 is being secured in the chuck I I4. After the skillet H3 has been so inserted through the notches or recesses of the clamp members I 32, the skillet I I 3 can be rotated about the axis of the chuck II 4 until the flared portions IIS have been moved to positions under the clamp members I32 whereby the flared portions I I9 will be resiliently clamped by the clamp members I32 and the skillet II3 will thus be secured in the chuck I I4 preparatory to the grinding operation.

It is to be noted that the skillet II3 can be thus easily and quickly inserted to or removed from its clamping position in the chuck II 4 to facilitate economical and quantity production of the skillet II3 relative to the grinding operation thereof.

In order to facilitate the insertion or removal of the skillet H3 from the chuck H4 the movement of the lever 4| from its position as disclosed in Fig. l to its position as disclosed in Fig. 7, will operate to quickly move the table 21 and its supported structure, including the chuck H4 and the skillet II3, from its posiiton in engagement with the grinding wheel H8 and in which it is being ground, as in Fig. 8, to a position away from the grinding wheel I I8 thus permitting the skillet II3 to be readily and quickly removed from the chuck H4 and another skillet I I3 inserted ready for grinding without interfering with the grinding wheel II8.

It is to be noted that as the shaft 'I'! is rotated, together with its arm or housing 16, by the electric motor assembly I85 which is operatively connected with the shaft 1! and forms the driving means thereof, the revolving movement of the cam follower '15 about the axis of the shaft TI will by its reaction of its operative engagement with the cam groove I4 of the cam plate I2 cause the housing 68 together with its supported structure to provide the necessary dwell or hesitation of the surface II6 of the skillet II3 with the grinding or similar member I I8 to insure contact of the surface II6 during the required number of revolutions of the grinding member I I8 to properly finish the surface I I6, the outline of the cam groove I4 determining the amount of the hesitation or dwell period.

At the same time the upper retainer or table member 58 together with its supported structure, including the

housings

64, 68 and the electric motor assembly I85 together with its operatively connected mechanism, and also together with the chuck II4 and the skillet II3, will be caused to reciprocate relative to the axis of the shaft or extension 82, said reciprocating motion together with the reciprocating motion of the housing 68 thus causing the chuck H4 together with its skillet II3 to move through the proper path to cause the skillet II3 to move past the grinding wheel II 8 to grind the desired outline of the surfaces H5 and H6.

It is to be noted that the upper retainer member 58 will be provided with a boss I35 in which is pivotally mounted the shaft I36 by means of the pin I3! and the lower retainer member 41 will be provided with a boss I38 for abutting the boss I35, the boss I38 having a slot I39 for receiving the shaft I36. The shaft I36 is provided with the spring I48 mounted between the washer MI and the thumb nut I42 which is threadably mounted on the shaft I36.

The shaft I36, together with its spring I48, washer I4I and the thumb nut I42, may be pivotally moved about the pin I3'I so that the shaft I36 may be swung entirely out of the slot I39 when it is desired to rotatably operate the upper retainer member 58 without being opposed by the resilient action of the spring I48.

When the retainer member 58 is being oscillated about the axis of the extension 82 mechanically by the above mentioned power driven mechanism, the shaft I36 together with the spring I48 and its operatively associated parts will be pivotally moved to the position as disclosed in Fig. 4 in which the upper retainer member 58 will be adapted to be oscillated against the pressure of the spring I48, permitting the operation of the upper retainer member 58 in its oscillatory movement to always be against the pressure of the spring I48 which will tend to allow the lug or the portion I35 to be moved away from the boss I38 thus introducing a resilient resistance against the oscillatory motion of the upper retainer member 58 and its supported structure and causing the grinding wheel H8 to resiliently follow the general contour of the surface with which the grinding wheel H8 is contacting, thus permitting the finishing operation of the grinding to be conducted along such surfaces without adhering to a definite amount of grinding cut or removal of material, the grinding wheel I I8 thus being allowed to float across the surface to permit the finishing of the surface and yet allowing said finished surface to normally follow the irregular or rough outline of the surface of the skillet H3, the upper work holding mechanism being thus allowed to float in its engagement with grinding or similar member and with tension, the amount of tension depending on the spring I48, this allowing the grinding member IIB to follow the surface being finished rather than remove the higher areas contacted by the grinding member II8.

In some instances it will be desired to not use the oscillatory motion of the machine as above described in conjunction with the spring I48 and in that 'case the upper retainer member 58 will be locked in its position, as shown in Fig. 4, by means of the lever I43 engaging the slot I44 in the upper retainer member 50, the lever I 43 being pivotally mounted on the pin I46 in the bosses I4I of the lower retainer member 4? and actuated to a locked position by the spring I34. The lever I43 may be pivotally moved to a position where it does not engage with the slot I 44 as above described in which position, of non-locking engagement relative to the upper retainer member 50, it may be locked by the set screw I45, the lever I43 being provided with the reinforcing portion I48. Also the upper retainer member 5!] and its supported structure may be oscillated by hand to remove the chuck H4 and its work from the grinding wheel or similar member II8 to permit the finished work to be readily removed and new work replaced in the chuck N4, the spring I45, however, not being used in this operation, to oppose the oscillating movement of the upper retainer member 55 and its supported mechanism.

The shaft 82 or extension portion of the lower table member 41 extends through the upper retainer member 55 and has a suitable bearing in the boss I49 of the bracket 51 thus providing a substantial support for the oscillating retainer member 5!] and its supported structure. The table member 41 may be provided with the boss I 55 when it is desired to use the shaft I36 and its operatively connected mechanism on the other side of the work holding machine to provide for either right or left hand operating positions for same. 1

The housing 89 will be provided with a suitable surface for supporting the bracket I54 which may be constructed integrally with the housing 89 or suitably connected thereto, the bracket I54 being provided with the boss I55 to which is pivotally connected the stud I55 which extends through the plate I5'I on which is suitably secured the electric motor assembly I115.

The plate I5I is pivotally connected at I58 with the bracket I54. One end of the plate I5I is secured to the, stud I56 by means of the nuts I59 which thus provide means for adjustably shifting the plate I5I pivotally about the point I58 to provide various positions of adjustment of the electric motor assembly I55 thus in turn providing means for taking up slack in the belt I02, the housing I09 being suitably mounted to move in the adjusting operation relative to either the electric motor assembly IE5 or the housing 89.

The cam follower I5 is provided with the head portion I55 which has a bearing in the housing I6, said head portion I65 being adapted to be slidably moved longitudinally of the housing 66 on the bearing surfaces IGI, the head I65 being rectangular in shape to provide means for preventing the cam follower I5 from turning about its axis and to absorb loadreactions due to the operative engagement of the cam follower I5 with the cam slot I4. The housing II; may be open at one of its ends and the cover member I52 closes said open end of the housing I6 and may be secured by the screws I53, the cover member I52 being provided with the boss I64 which extends within the housing It, said boss I64 being provided with a suitable bearing for rotatably supporting the screw I55 which threadably engages the head I55 of the cam follower I5, the screw I65 extending through the cover member I62 and being provided with the squared end I55 which thus permits the screw I65 to be rotated by means of a wrench or similar tool. The screw IE5 is restrained from longitudinal motion by the washers I51 engaging the cover member I62.

The housing I6 is provided with the slot I68 through which extends the cam follower I5 thus permitting the head I65 with the cam follower I5 to be adjustably moved longitudinally of the housing I6 to provide the desired length of arm movement in accordance with the distance between the axis of the cam follower I5 and the axis of the shaft II.

The toggle mechanism of my invention is similar to that disclosed in my U. S. Letters Patent, Serial No. 1,430,625, issued October 3, 1922. The toggle mechanism, however, in my present invention is used in conjunction with a pair of slide members, and with the rotatably supported structure as above disclosed.

In operation the work, such as the skillet H3, is placed in the chuck mechanism H4 and located relative to the grinding wheel IIB and its supporting structure so that the double slide 25 may be actuated by means of the wheel 36 to such position as will permit the skillet I I3 to be in proper position for the grinding wheel II8. After the operation of grinding has been performed by the mechanism rotatably supported on the upper retainer member 50, said rotatably mounted mechanism in its supported position on the table 2! may be quickly and slidably moved on the double slide 25 by means of the toggle mechanism, the lever 4I being moved from its position as disclosed in Fig. l to that as approximately shown in Fig. '7. Also when desired for certain types of work the spring I40 and its operatively associated parts may be pivotally moved away from engagement with the boss I38 which will permit the upper retainer member 5!] and its work supporting mechanism to be rotated by hand to move the chuck H4 and its work from a position adjacent the grinding wheel to permit the finished work to be readily removed and new work replaced in the 'chuck I I4, the engagement of the lever I43 with the upper retainer member 55 making it easy to rotatably move the upper retainer member 55 back to an indexed position, as when engaged by the lever I43, thus permitting quick rotation of the work holding structure again to its proper position relative to the grinding member IIB, after the work has been replaced in the chuck II4.

I claim:

1. In a work holding machine, the combination of a slide member, a second slide member on said first mentioned slide member and adapted to reciprocate substantially at right angles to said first mentioned slide member, a table member slidably mounted on said second slide member and adapted to reciprocate in the same direction as said second slide member, a toggle lever mechanism operatively connected with and adapted to reciprocate said table member, means for moving said second slide member without exerting a reciprocating thrust to said table member through said toggle lever mechanism, a structure rotatably mounted on said table member and provided with a cam member, a second structure slidably mounted on said table member and provided with a crank arm, a cam follower mounted on said crank arm and operatively engaging said cam member of said table member, a chuck mechanism for holding the work, and means for rotating said chuck mechanism and said crank arm.

2. In a work holding machine, the combination of a slidably mounted member, a structure mounted on said slidably mounted member and adapted to oscillate about a vertical axis extending at right angles to the direction of the movement of said slidably mounted member, cam means for actuating said structure with an oscillating movement, said cam means being mounted on said structure, means for adjusting the position of said structure supporting said cam means to position said cam means with its axis at an angle relative to the vertical axis of said structure, and means for operatively driving said cam means.

3. In a work holding machine, the combination of a slide member, toggle means for actuating said slide member, a retainer member on said slide member, a second retainer member suitably mounted on said first mentioned retainer member, a pilot portion mounted in said first mentioned retainer member and extending through said second retainer member, a bracket mounted on said second retainer member and provided with a bore for engaging said pilot portion of said first mentioned retainer member, rollably mounted members between said first and said second mentioned retainer members, a structure on said second retainer member, work holding means on said structure, means for rotating said work holding means and said structure together with said second retainer member.

4. In a machine for holding work with an irregular surface in contact with a grinding member, the combination of a revolvably mounted member for holding the work, means for operatively driving said revolvably mounmd member, a structure supporting said means and rotatably mounted, said structure being actuated with an oscillating movement by said means, and resilient means opposing the oscillating movement of said structure to cause the work to contact the grinding member with sufficient pressure only to permit the grinding member to remove a uniform amount of material only from the irregular surface of the work.

5. In a work holding machine, the combination of a shaft revolvably mounted, a housing mounted on said shaft and adapted to revolve with said shaft, said housing forming a crank arm, a cover member closing one end of said housing, a shaft revolvably mounted in said cover member, and a cam follower slidably mounted in said housing and extending therefrom, said cam follower be ing operatively connected with said shaft.

6. In a work holding machine for use with a finishing member, the combination of a slide member, a housing rotatively mounted about a vertical axis on said slide member, a second housing mounted on said first mentioned housing and provided with a pair of upright flanges oppositely disposed about the axis of said first mentioned housing, a third housing having a pair of depending flanges engaging the upright flanges of said second housing, means securing the depending flanges of said third housing to the upright flanges of said second housing, a structure slidably mounted on said third housing and provided with means for supporting the work in engagement with the finishing member, means for driving the work to rotate in its supported position, said last mentioned means being supported on said structure, and a second means for reciprocating said structure, said second means being driven by said first mentioned means.

7. In a work holding machine for use with the finishing member, the combination of a slide member, a housing rotatably mounted on said slide member, said housing having an axis extending normally in a vertical direction, a second housing mounted on said first mentioned housing and provided with a pair of flanges oppositely disposed about the axis of said first mentioned housing, a third housing having a pair of flanges adjacent the flanges of said second housing, one of said pair of flanges of said housings being provided with a pair of radial. slots, means for securing said pairs of flanges together, said means extending through said radial slots, a structure slidably mounted on said third housing and provided with means for holding the work in engagement with the finishing member, a second means for rotating the work, and a third means for reciprocating said structure, said third means being driven by said second means.

8. In a work holding machine for use with the finishing member, the combination of a slide member, a housing rotatably mounted on said slide and having an axis extending normally in a vertical direction, said housing being provided with slots located radially relative to the axis of said housing, means for securing said housing to said slide member, said means engaging said slots, a second housing mounted on said first mentioned housing, a structure slidably mounted on said second housing and provided with means for holding the work in engagement with the finishing member, means for rotating the work, said means being supported on said structure, and a second means for reciprocating said structure, said second means being driven by said first mentioned means.

9. In a work holding machine for use with the finishing member, the combination of a slide member provided with a housing having a vertical pilot shaft, a second housing rotatably mounted on said first mentioned housing and having a bore surrounding said pilot shaft of said first mentioned housing, a bracket mounted on said second housing and provided with a boss having a bore engaging said pilot shaft of said first mentioned housing, a second bracket mounted on said first mentioned bracket, a structure slidably mounted on said second bracket and provided with means for holding the work in engagement with the finished member, means for rotating the work, said means being mounted on said structure, and a second means for reciprocating said structure, said second means being driven by said first mentioned means.

10. In a work holding machine for use with a finishing member, the combination of a slide member provided with a table member having a bore, together with a pilot shaft, a housing surrounding said pilot shaft and having a bore, race members in each of the bores of said table member and said housing, each of said race members being provided with a plurality of circular raceways, rollable members in the circular raceways of said race members, a second housing structure on said first mentioned housing and provided with a boss having a bore engaging said pilot shaft of said table member, a second structure slidably mounted on said second housing, and provided with means for holding the work in engagement with the finishing member, means for rotating the work, said means being supported on said second structure, said second means being driven by said first mentioned means.

11. In a work holding machine for use with a finishing member, the combination of a slide member, a housing rotatably mounted on said slide member and provided with a pair of upturned flanges, a second housing provided with a pair of depending flanges adjacent the pair of upturned flanges of said first mentioned housing, said second housing being further provided with a pair of upturned flanges, means for securing the adjacent flanges of said first mentioned and said second housings together, a structure slidably mounted on said second housing and provided with means for holding the work in engagement with the finishing member, said structure being further provided with a crank having a cam follower, a cam plate mounted on the pair of upturned flanges of said second housing and engaged by said cam follower, means for rotating the work, and a second means for rotating said crank, said second means being driven by said first mentioned means.

12. In a work holding machine for use with a grinding member, the combination of a slide member, a second slide member mounted on and adapted to reciprocate in the same direction as said first mentioned slide member, a work holding structure rotatably mounted on said second slide member, and a toggle mechanism for actuating said second slide member together with said work holding structure to move the work to and from the grinding member, said toggle mechanism being operatively connected and solely supported between adjacent ends of said first mentioned and said second slide members.

13. In a work holding machine for use with a grinding member, the combination of a slide member provided with an upwardly extending boss, a work holding structure rotatably mounted on said slide member, a. toggle mechanism suitably mounted and operatively connected with said upwardly extending boss of said slide member for moving said slide member and said Work holding structure to and from the grinding member, cam mechanism for actuating said Work holding structure with an oscillating movement about its axis, and means for operatively driving said cam mechanism.

1.4. In a work holding machine for use with a grinding member, the combination of a slide member, a structure rotatably mounted on said slide member, a second slide member mounted on said rotatably mounted structure and adapted for rotative movement therewith, a. work holding structure mounted on said second slide member and adapted for rotative movement with said second slide member and said first mentioned structure, cam mechanism for rotating said first mentioned structure, together with said second slide member and said work holding structure, to and fro about the axis of said first mentioned structure, said cam mechanism further actuating said second slide member with a reciprocating movement, means for operatively driving said cam mechanism, and a toggle mechanism for actuating said first mentioned slide member together with its supported mechanism to move the work to and from the grinding member,

15. In a work holding machine for use with a grinding member, the combination of a slide member adapted to reciprocate and provided with a lug at its end, a second slide member mounted on said first mentioned slide member and adapted to be reciprocated in the same direction as said first mentioned slide member, said second slide member being provided with a lug at its end adjacent said end of said first mentioned slide member provided with said lug, a work supporting structure rotatably mounted on said second slide member, means for actuating said first mentioned slide member, a toggle member mechanism operatively connected'between said lugs of said first mentioned and said second slide members for positively actuating said second slide member and said work holding structure in both directions of said reciprocating movement thereof to move the work to and from the grinding member, and means for rotating said work holding structure to and fro about its axis.

16. In a work holding machine, the combination of a structure rotatably mounted and provided with upturned wall portions, a cam plate extending between and connecting the upper ends of said upturned wall portions of said structure, said structure being provided with way members extending between said upturned Wall portions and below said cam plate, a sec-- ond structure slidably mounted on said way members of said first mentioned structure and provided with a housing structure extending around said cam plate and providing clearance space for the slidable movement of said second structure relative to said cam plate, a cam follower operatively mounted on said second structure and engaging said cam plate, and means for operatively driving said cam follower.

17. In a work holding machine for use with a finishing member, the combination of a pair of slidably mounted members, said pair of members being slidably mounted one upon the other and both being adapted to reciprocate longitudinally in like directions, work holding means supported on said pair of members, a toggle mechanism solely supported by said pair of slidably mounted members, and adapted to reciprocate one of said pair of slidably mounted members relative to the other to move the work to and from the finishing member, said toggle mechanism being provided with a handle member adapted tobe grasped by an operator, and means revolvably mounted in one of said slidably mounted members and engaging the second slidably mounted member to reciprocate said second slidably mounted member to move the work to and from the finishing mem" ber without any thrust being exerted by the op erator on the handle member of said toggle mechanism.

18. In a work holding machine for use with a grinding member, the combination of a slide member movably mounted and adapted to reciprocate and provided with a boss at one of its ends, a second slide member movably mounted on said first mentioned slide member and adapted to reciprocate in a like direction therewith, said second slide member being provided with a boss at its end adjacent said boss of said first mentioned slide member, a work supporting structure supported on said slide members, means for actuating said second slide member to and from the grinding member, and a toggle mechanism pivotally connected between said bosses of the adjacent ends of said slide members for actuating said first mentioned slide member on said second slide member and to and from the grinding member.

19. In a work holding machine for use with a grinding member, the combination of a slide member movably mounted and adapted to re-- ciprocate and provided with a boss at one of its ends, a second slide member movably mounted on said first mentioned slide member and adapted to reciprocate in a like direction therewith, said second slide member being provided with a boss at its end adjacent said boss of said first mentioned slide member, a work supporting structure supported on said slide members, a shaft member revolvably supported in said first mentioned slide member and engaging said second slide member to actuate said second slide member to and from the grinding member, and a hand wheel member mounted on said shaft member adjacent said boss at the end of said first mentioned slide member, and a toggle mechanism pivotally connected between said bosses of the adjacent ends of said slide members for actuating said first mentioned slide member on said second slide member and to and from the grinding member.

20. In a work holding machine for use with a grinding member, the combination of a slide member movably mounted and adapted to reciprocate and provided with a cylindrical portion together with a boss adjacent the cylindrical portion, a second slide member movably mounted and supporting said first mentioned slide member and adapted to reciprocate in a like direction to move said first mentioned slide member to and from the grinding member, said second slide member being provided with a boss at its end adjacent said boss of said first mentioned slide member, a bearing mechanism rollably mounted in said cylindrical portion of said first mentioned slide member, a work supporting structure rotatably mounted on said bearing mechanism, and a toggle mechanism pivotally connected between said boss of said first mentioned slide member and said boss of said second slide member for moving said first mentioned slide member together with said bearing mechanism and said work supporting structure to and from the grinding member.

21. In a work holding machine for use with a grinding member, the combination of a slide member movably mounted to reciprocate, a second slide member movably mounted on said first mentioned slide member and adapted to reciprocate in a like direction therewith, a structure rotatably mounted thereon and provided with a pilot portion at its upper side, a work holding structure rotatably mounted on said pilot portion of said first mentioned structure, means for securing said work holding structure rigidly to the pilot portion of said first mentioned structure, and a toggle mechanism pivotally connected between said slide members.

22. In a work holding machine for use with a grinding member, the combination of a slide member movably mounted, a second slide member slidably mounted on said first mentioned slide member, a structure rotatably mounted on said second slide member and provided with a pilot portion, a work holding structure provided with an extension portion having a bore for receiving said pilot portion of said first mentioned structure, said extension portion being adapted to be clamped in securement with said pilot portion of said first mentioned structure, means for clamping said extension portion of said work holding structure in securement with said pilot portion of said first mentioned structure, and a toggle mechanism operatively connected between said slide members.

23. In a work holding machine for use with a grinding member, the combination of a pair of slide members one mounted upon the other, a structure rotatably mounted on the upper of said slide members, a work holding structure rotatably mounted on said first mentioned structure, means for fastening said work holding structure in a fixed position on said first mentioned structure,

and a toggle mechanism operatively connected between said slide members.

24. In a work holding machine for use with a grinding member, the combination of a slide member movably mounted, a second slide member slidably mounted on said first mentioned slide member, a structure rotatably mounted on said second slide member and provided with a pilot portion, a work holding structure provided with an extension portion having a bore for receiving said pilot portion of said first mentioned structure, said extension portion being adapted to be clamped in securement with said pilot portion of said first mentioned structure, means for clamping said extension portion of said work holding structure in securement with said pilot portion of said first mentioned structure, and a toggle mechanism operatively connected between said slide members, and means for securing said first mentioned structure in a fixed position on the upper of said slide members.

25. In a work holding machine for supporting work in a finishing operation, the combination of a base, a pair of slide members mounted one above the other and adapted to reciprocate substantially at right angles to one another, a third slide member mounted on one of said pair of slide members, toggle mechanism manually operated and connecting said third slide and one of said pair of slide members, said slide members connected by said toggle mechanism being adapted to move in a similar direction, a structure rotatably mounted on said third slide member, a cam plate supported on said structure rotatably mounted and intersecting the axis thereof, cam means slidably mounted on said structure rotatably mounted and adapted to actuate said cam plate together with said structure rotatably mounted with an oscillating movement about a vertical axis, a chuck mechanism for holding the work and mounted on said structure rotatably mounted, resilient means opposing the oscillating movement about a vertical axis of said structure rotatably mounted to cause the work to contact the finishing member with sufficient pressure only to permit a uniform amount of material being removed from the work, and means for driving said cam and said chuck mechanisms, said cam mechanism being driven to provide a dwell period in its movement to enable said chuck mechanism and the work to be driven without a reciprocating motion during a portion of their operative movement.

26. In a work holding machine for supporting work in a finishing operation, the combination of a slide member provided with a cylindrical portion, a structure rotatably mounted about a vertical axis on said slide member and provided with a cylindrical base adjacent said cylindrical portion of said slide member, cam mechanism for actuating said structure with an oscillating movement about the vertical axis thereof, resilient means mounted on said cylindrical portion of said slide member and opposing the oscillating movement of said structure about its vertical axis, said resilient means causing the work to contact the finishing member with sufficient pressure only to permit a uniform amount of material to be removed from portions of the work in the finishing operation, and means for operatively driving said cam mechanism.

27. In a work holding machine for supporting work in a finishing operation, the combination of a slide member, a structure rotatably mounted about a vertical axis on said slide member, cam

mechanism for actuating said structure with an oscillating movement about the vertical axis thereof, resilient means suitably mounted to ppose the oscillating movement of said structure about its vertical axis, said resilient means causing the work to. contact the finishing member with suflicient pressure only to permit a uniform amount of material to be removed from portions of the work in the finishing operation, means for operatively driving said cam mechanism, and means for engaging and locking said structure against movement about its vertical axis.

28. In a work holding machine, the combination of a structure rotatably mounted, a power unit supported by said structure, means for actuating said structure with a non-sliding movement about a vertical axis, means resiliently opposing the oscillating movement of said structure about a vertical axis, pivotally mounted means for looking said structure against oscillating movement about said vertical axis, and clamp means for locking said pivotally mounted means in a nonlocking position relative to said structure.

29. In a work holding machine, the combination of a shaft revolvably mounted, a housing on said shaft and adapted to revolve therewith, said housing forming a crank arm, a cam follower movably mounted in said housing, and shaft 'means revolvably mounted in said housing for adjustably moving said cam follower to provide difierent effective lengths of said crank arm, said shaft means operatively engaging and extending within said cam follower.

30. In a work holding machine for use with a finishing member, the combination of a pair of slide members, one of said slide members being provided with slideways on both of its upper and lower surfaces, one of said slide members being mounted on the slide portion at the upper side of said first mentioned slide member, work holding means supported by one of said slide members, said pair of slide members being restrained to move solely with reciprocating motions in like directions, and a toggle mechanism solely supported by and between said pair of slide members and adapted to move one of said slide members together with said work holding means to and from said finishing member.

31. In a work holding machine for use with a grinding member, the combination of a slide member provided with a pilot portion extending vertically, a structure rotatably mounted on said slide member and having a bore for receiving the pilot portion of said slide member to provide alignment support for said structure, said struc ture being provided with means for holding the work, said structure being further provided with a cam plate adapted to be slidably moved therewith, cam mechanism for slidably operating said cam plate together with a portion of said structure, and means for driving said cam mechanism to oscillate said structure relative to said grinding member.

32. In a work holding machine for use with a finishing member, the combination of a work holding structure rotatably mounted and provided with a lug extending therefrom, an anchored structure supporting said work holding structure and provided with a lug extending therefrom and adapted to engage said lug of said work holding structure, said lug of said anchored structure being provided with a slot extending therethrough, a member pivotally mounted on said lug of said work holding structure and adapted to pivotally move within said slot of said lug of said anchored structure, resilient means mounted on said member pivotally mounted in said lug of said work holding structure and adapted to engage said lug of said anchored structure, said resilient means being adapted to oppose rotation of said work holding structure, and means for rotating said work holding structure against the resiliency of said resilient means to move the work relative to said finishing member.

33. In a work holding machine for use with a finishing member, the combination of a structure rotatably mounted and provided with a slot in its peripheral portion, said structure being further provided with work holding means for supporting the work in engagement with said finishing member, resilient means anchored to oppose the rotation of said structure, a member pivotally mounted on said structure and adapted to be pivotally moved to a position where it is anchored relative to said structure, said member supporting said resilient means, said member being adapted to move said resilient means to a position in which said resilient means will not oppose the movement of said structure, and handle means pivotally mounted adjacent said structure and provided with portions for engaging said slot of said structure to lock said structure against rotation.

34. In a work holding machine adjacent a grinding machine, the combination of a structure rotatably mounted and adapted to support the work in engagement with the grinding member on said grinding machine, said structure being provided with a cylindrical base, a slide member supporting said structure and provided with a cylindrical portion adjacent said cylindrical base of said structure, means supporting said structure and adapted to drive the work to rotate it in its supported position, a lever pivotally supported on said cylindrical portion of said slide member and adapted to engage portions of said cylindrical base of said structure to lock said structure against rotation, and means supported by said slide member for locking said lever in an unlocked position relative to said structure to permit said structure to be manually operated relative to said slide member.

GUSTAVE A. CARLSON.