US1921333A - Grinding machine - Google Patents

Description

Aug 8, l933-l L. B. s'roGNER 13,921,333

GRINDING MACHINE Aug. 8, 1933. l.. B. s'roGNl-:R

GRINDING MACHINE Filed June 5, 1932 3 sheets-sheet 2 MT .NM

5 Sheets-Sheet 5 Y y M bm. kN .WM Sw 3 f W y@ Aug. 8, 1933. L, B, sToGNl-:R

GRINDING MACHINE Filed'June 5, 1952 BOY PATENT OFFICE 1,921,333 GaiNDING MACHINE Lawrence B'Stogner, 'HartsvillegLS C., assigner -to Sonaca Products Company, Hartsville, S. C.,k a Corporation of South Carolina l Application AJune 3, 1932. Serial No. 615,236 l j '10. claims. (o1. 5in- 241) This invention'relates to grinding' maclfiinesv and more particularly to portable grinding machines of the type Aadapted to be applied to various kinds of apparatus ferthe purpose of grinding or' abrading, in-situ, certain elements thereof, the

detachment orreniov'al of which, forthis purpose,

would be imrn'acticable.4

The general object of the invention is to pro- -vide a novel and improved device of this character which is'simple and compact in construction, easy' to manipulate, and accurate in operation.

in its preferred embodiment, the invention contemplates the provision of a smallV portable machine provided with rotaryabrasive membersand a source. of .power for driving them, which machine is particularly adapted for application to the drawing rolls of a spinning frame.

As is well-known in .the art, drawing rollsof the type commonly .used in Ythis connection are arranged in pairs, one of each pair disposed above theotherfthe lower onesbeing positively. driven bymeans of suitable gearing and the upper onesl generally being driven by frictionalcontact with, the bottoni rolls.A The bottom rolls are made of steel and comprise a series offiuted portions each separated from the vnext adjacent portion by necks of less diameter than the fluted portions,

Theseoperative portions of the bottom rolls are fiuted orvlongitudinallyslotted for Vthe purpose of aiding the bottom rolls in obtaining a better grip on the cotton as it passes-between them and the top, rolls. The top rolls are also ofmetal and are generallymade in short lengths andtassembledv end to end. Those portions ofthe top rolls which lievadjacent the fluted portions of the bottom rolls are provided with cylindrical cork covered cots which are adapted to provide elastic surfaces ofv contactforthe cotton fibers passing between the rclls.-k `After,continued operation of these drawing rolls, the cork surfaces of thetoproll cots becomel worn by contact with the cotton and the iiuted bottom rolls, and it is necessary to periodically grind orbuff these cots in order to resurface them.

Itis, therefore, a more particular object of the present invention to provide a `portableA power dri-yen grinding machinewhich is well adapted to accomplish the resurfacing of these top roll cots and` which comprises' a novel clamping frame by means of which the devicemay be transported andmay be temporarily seeured'to the b'o'ttem rolls'of the spinning frame. vThe devicealso.in--

cludes means for bringing the buiing or grinding element into contact with ,the surface of top roll cots with thedesired degree of pressure to effect the proper abrading etion,andadiust-` able means for movably'supporting a motor for driving the grinding elements..

Other objectsV and features of novelty will be apparent from. the following specification when read in connection with the accompanying drawy ings in which, one embodiment of my invention is illustrated by way of example.

In the drawings: v i.

Figure 1 is a view in side elevation of a grinding device embodying the principles of my invention and showing the device applied to a pair of drawing rolls of a spinning framathese rolls being shown in vertical cross-section:

Figure 2 is aplan View of my improvedgrinding device with the driving motory omitted;V

Figure 3 is a transverse cross-sectional View taken on line 3-3ofFigure'1; y

Figure 4 is a transverse cross-sectional view taken on line 4,-4 of Figure l; v l

Figure 5 is a longitudinal cross-sectional View 75 Figure '7.fis a vfragmentary side elevation shoW- 80;.

ing the grinding machine appliedto a spinning. frame' and illustrating the manner in which. the grinding wheel may be'brought to bear upon any one of the. upper rolls. j

Referring particularly to Figure 1 of the draw- 85 f' ings,'the numeral 10 indicates thelower fluted. roll of a pair of drawing rolls of a spinning frame. The correspondingupper roll is indicated at 11 and is provided with the corklcovered cot'12. The section through thev bottom roll 10 is taken at 90 onev of the neck portions thereof which occur between the fluted sections which are adapted to contact with vthe top rolls. YU.The section through the top roll, however, is taken at a point where the drawing action occurs, and theroll is shown in Contact with the buiiing or grinding wheels 15.

Themain frame-of the'grinding machine, t-l gether with its various adjustment features, is shown most clearlyin Figure 6 of the drawings and is indicated generally by the letter A. The mainframe A comprises essentially thecomfbination of elements which will now be defr scribed. The rearwardly yextendingA hand1e20 is provided with bifurcations 21y which extend alf lmost tothe front end of the machine. A forward handle or bail 25 is adapted to straddle the front L ends of the bifurcations 2l and is provided withy downwardly and forwardly extending arms 26. which are secured to the members 21 by means f of the connecting elements 27. vThe 'lower ends .1-10

g wheels l5.

are fulcrumed upon the bolts and 61 which 60' are secured to the side bars 50Yand 51 respectively.

- and 51, as clearly shown at 63 and 64.

of these arms 26 extend forwardly in a direction parallel to the members 21 and are provided with openings for the reception of the forward cross rod 28. A rear cross rod 29 also passes through openings in the members 21 as at 30. Two outer frame members 3l and 32 are mounted on the crossv rods 28 and 29 for lateral adjustment and at their forward ends are provided with jaws 33 and 34 which are adapted to receive the bottorn rolls 10 as shown in Figures 1 and 5 of the drawings.

The lateral adjustment of these side frame jaw members 31 and 32 is accomplished by means of the rotatable cross bolt 35, the ends of which are provided with threads of opposite hand. The bolt 35 is provided at its mid-portion with the knurled wheel 36, the hub portion 37 of which is adapted to rotate between the arms 21 of the handle portion 20 of the main frame. It will be readily understood that rotation of the shaft 35 in 'one direction will cause the lower jaw members 33 and 34 to approach each other and that rotation in theopposite direction will cause them to recede. This adjustment permits the application of the device to bottom rolls, the fluted portions of which may be of varying lengths.

A pivoted upper jaw member 40 is fulcrumed upon the cross rod 28, and its rearwardly extending shank 41 is positioned below the main frame and has its rear end secured to an upwardly directed actuating lever as at The shank 41 is bifurcated, as shown in Figure 3, in order to receive the lower portion of the lever 42 and the extension 44. A coil spring 45 is adapted to connect the portion44 with a cross pin 46 which extends between the elements 21 of the main frame. It will be readily seen that the spring 45 continually urges the lower jaws 33 land 34 andthe upper jaw 40 toward each other which are pivotally secured to the outer main frame members 81 and 32 as by means of the bolts 52 and 58. The upwardly and forwardly projectingends ci these bars 50 and 51 are provided with adjustable extensions 54 and 55 which are adapted to carry the bearings 56 and 57 within which is received the axle 59 of the grinding These forward extensions 54 and 55 j The rear endsof the members 54 andr 55 are 'turned upwardly' and inwardly so as toY overlie the upper edges of their Vassociated members 50 Set screws 66 and y67 are threaded through the inwardly extendingl portions of the members 54 and 55. and their lower ends arejadapted to bear upon the top edges oi" the bars v50 and 51. These set screws are providedvwith knurled heads for aiding in rotating them, the linurled lock nuts 68 and 69 are adapted to secure the set screws in their adjusted positions. AV spring-70 is adapted to urge the rear ends of the members 54 andA 55 downwardly and thus urge the vadjacent endof ,the axle 59 upwardly. This tendency may be counteracted by the proper adjustment of either of the set screws 66 or 67, and by this means the proper level or parallel position of the grinding wheels 15 may be obtained.

The rear portions of the bars 50 and 51 of the pivoted grinding wheel carrying frame B are adapted to extend below the main frame and terminate in the return bent portions 72 and 73. Both the main rear portion of the bars 50 and 51 and these return bent portions 72 and 73 are provided with openings to receive the cross bar 75. Outwardly of the side frame members 31 and 32, there are positioned on the rear cross shaft 29 the sleves 77 and 78 which may be secured to these members 31 and 32 and which provide stops or abutments for the rear portions of the bars 50 and 51 of the pivoted wheel carrying frame.

An operating handle or lever 80 is provided with forwardly extendingbifurcated portions 81 and 82, the forward ends of which are provided with openings through which is adapted to extend the rear cross rod 29 of the main frame. Intermediate the ends of this bifurcated lever 80 is pivotally suspended the U-shaped link 85 as by means of the bolts 86 and 87. The arms of the link 85 near the bottom portion of the link are provided with openings through which the centrol portion of the cross bolt is adapted to be received. This provides a pivotal connection between the operating handle and the pivoted grinding wheel carrying frame B.

The arrangement for supporting the driving means for the grinding wheels 15 will now be described. A mo'tor carrying frame C is provided which comprises a vertically extending bracket 90 to which is suitably secured the motor 91 having a vertically disposed armature shaft 92, upon the lower end of which is iiXed the pulley 93 about which passes the belt 95 which extends forwardly of the apparatus and around the pulley 96 which is secured to the axle 59 of the grinding wheels 15. The lower portionrof .the motor supporting Vframe C comprises the two spaced arms 98 and 99 which are pivotally connected to the arms 21 of the main frame handle 20 as at 100 and 101.

It is obvious that the motor carrying frame C must partake of substantially the same movements as thev grinding wheel supporting frame B in order to maintain the operative driving connections, and the following adjustable means is yoke 105 having a central downwardly depending portion 106 is pivoted at its ends to the members 98 and 99 of the motor carrying frame C. The portion 106 is provided with an opening which is adaptedto receive the bolt 107, the lower end of which'is provided with the sleeve portion 108 adapted to receive the shaft 75 which forms the part of the connection between the pivoted frame B and the actuating handle 80. A nut 109 is threaded upon the bolt 107 above the yoke 105, and by rotating this nut, the proper relative positions Voi the frames B and C may be obtained. A coil spring 110 surrounds the shank of the bolt 107 and is adapted to be compressed between the depending central portion 106 of the yoke 105 and the sleeve portion 108 of the bolt 107. In prac` tice, after thebelt 95 has been applied to the pulleys 93 and 96, the nut 109 is rotated to a position to apply the proper tension to the belt 95, and the coil spring 110 provides the necessary resilience in preventing undue strain upon the belt during operation.

A bolt 112 is threaded through the handle 20 of the main frame A, and the lower end thereof Vprovided for maintaining this relationship. A

is adapted to provide a stop orabutment for the handle in order to limit the downward movement of the grinding wheel 15. Y

The application and operation of the device will be readily understood..V The machine should be grasped by the forward bail handle 25 with one hand, and the levers 20 and 80 are gripped with the other hand.V In order' to open "the clamping members of the main frame, the handle 42 is'depressed by applyingipressurewith the thumb to the upper end 47 thereof. This, of course, will raise the upper jaw member 40 and permitthe application of the lower jaws 33` and 34 tothe neck portions ofthe bottom rolls 10. Upon release of the handle 42, 4'7,y the upper jaw 40 will come intogripping contactwith the bottom rolls either at a'neckjportion thereof or against the iiuted portion itself. The machine is nowtem-v porarily attached to the spinning frame. for operation.V Next, the grinding wheels V1,5 are ad-A ljusted; so that-their axle 59 Vis parallel with the axis of the top rolls ll, by means of the set screwsl 66 and,67. Then the grinding wheels. 15 are brought into proper contact with vthe surfaces. of the top rolls vby an upwardjmovernent'of the lever 8G; The motor 91, which is adaptedyto receive its current from a suitable source, is then started, and the abrading or resurfacing operation may be readily effected. y

Figure 7 illustrates clearly-the application'of the grinding machine toa spinning frame, whereby not only the first upper -roll cots may be resurfaced but also those of the` other upper rolls of the series.

the machine is raised aboutthis pivot at'the same time that the grinding wheelsare moved-upwardly about their pivots 53. Itwill thus be seen that the wheelsl l5 arefextended over the nearer rollers in order to contact with those at the rear portion of the frame by suitable manipulation of the handles 20 and 80. l

VBy means of the mechanism already described, the main frame may be adjusted laterally to accommodate the attaching jaws thereof to the particular bottom rolls to which the device is to be applied by means ofthe rotatable shaft 35 which is actuated by the wheel 36. The proper belt tension can also be obtainedby the adjustvment of the connecting mechanism -110.-v

attached toa machine for the purpose of grinding or resurfacing an element thereofsaid device comprising a main frame, a' pivotally mounted frame carried by said main frame, a grinding member on said pivotally mounted frame, another pivotally mounted frame carried by said main frame, a motor mounted on said second named pivoted frame, a belt operatively connecting said motor with said grinding member, a

2. A portable device of the type adapted to be The rst lower roll is retained as the pivotal clamping point for the machine, and f attached to avimachine for the purpose of grinding or resurfacing. an element thereof, said device comprising a laterally expansible main frame, `means for effecting expansion and contraction thereof, clamping jaws associated with said main framefor attachingl the device to a` spect to said element, another pivoted frame caryried by vsaid main frame, a motor disposed upon Asaid second named pivoted frame, a belt operativelyl connecting said motor withsaid grinding wheel, and means for. resiliently adjusting the relative positions of saidl movable frames for, movement vin unison and for regulating the tension in saidV belt.l l

, f 3. A portable grinding machine for resurfacing the top drawing rolls of spinning frames comprising, in combination, a main,` frame,v a rearwardlyextendingy handle for-[said main frame, a supplemental frame pivoted-to saidmain frame, a grinding device mountedgon saidv supplemental frame, and a manually operable lever for moving said supplemental frame toapply the grinding device to the rolls, the manipulative portion of.Y

said lever being disposed adjacent'V said handle and cooperating therewith to provide means for grasping said machine during operation'thereof.'

. 4. A portable grinding machine for resurfacing the top drawing rolls of spinning frames comprising, in combination, a main frame, a rearwardly extending handley for said main frame, a supplemental frame pivoted to said main frame,

-a grinding device mounted on said supplemental frame, a manually operable'lever for moving said supplemental frame to apply the grindingdevice to the rolls, 'the manipulative portion of said lever being disposed adjacent said handle and cooperating4 therewith to provide means for grasping said Y machine during operation thereof, and a pincerlike clamping device on said main frame for applying the machine to the bottom rolls of said spinning frame.

5. Aportable grinding machine forresurfacing the top drawing rolls of spinning frames comprising, in combinatioina main frame, a rearwardly extending handlefor said main frame, a grinding '130.

tool onsaid main frame, and a manually operable pincer-like clamp adapted to seize the necks of one of the bottom rolls of the spinning frame for supporting the machine in grinding position.

6. A portable grinding machine for resurfacing the top drawing rolls of spinning frames, comprising, in combination, a main frame, a rearwardly extending handle for said main frame, a supplef the top drawing rolls of spinning frames comprising, in combination, a substantially'rectangular, laterally expansible main frame, a rearwardly extendinghandle for said main frame, a supplemental frame pivoted to said main frame, a grind ing device mounted on said supplemental frame, and a manually operable lever for moving said supplemental frame to apply the grinding device to the rolls, the manipulative portion of said lever being disposed adjacent said handle and cooperating therewith to provide means f for grasping said machine during operation thereof.

8. A portable grinding machine for resurfacing drawing roll cots comprising, in combination, a substantially rectangular main frame which includes a longitudinall center bar, a pair of laterally spaced side bars, transverse rods connecting said bars, clamping jaws formed on said side bars for receiving the necks of a bottom roll of a drawing frame for supporting said machine in operative position, a cooperating clamping jaw pivoted to said center bar, a handle on said center bar, means for adjusting said side bars laterally to expand said frame to nt bottom rolls of various contours, a supplemental frame attached to said main vframe, and a grinding wheel mounted on said supplemental'frame.

9. A portable grinding machine for resurfacing drawing roll cots comprising, in combination, a substantially rectangular main frame which includes avlongitudinal center bar, a pair of laterally spaced side bars, transverse rods connecting said' bars, clamping jaws formed on said side bars for receiving the necks of a bottom roll of a drawing frame for supporting said machine in operative position, a cooperating clamping jaw pivoted to said center bar, a 1nandle on said center bar, means .for adjusting said side bars laterally to expand said frame to t bottom rolls of various contours, a supplemental frame pivoted intermediate its length to said main frame, a grinding wheel mounted upon one end of said supplemental frame, a lever pivoted to said' main frame and extending adjacent said handle, and a link connecting said lever and said supplemental frame whereby relative movement of said lever and said handle is adapted to effect the adjustiment of the grinding wheel with relation to said cots. Y

l0. A portable grinding machinefor resurfacing drawing roll cots comprising, in'cornbination, a substantially rectangular main frame which includes a longitudinal. center bar, a pairY of laterally spaced side bars, transverse rods connecting said bars, clamping jaws formedI on said side bars for receiving the necks oi a bottom roll of a drawing frame Vfor supporting said machine in operative position, la cooperating clamping jaw pivoted to said center bar, a handle on said center bar, means for adjusting said side bars laterally to expand said frame to iit bottom rolls of various contours, a supplemental frame pivoted intermediate its length to said main `frame, a grinding wheel mounted upon one end of said supplemental frame, a lever pivoted to said mainV frame and extending adjacent said handle, a link connecting said `lever and said supplemental frame whereby relative' movement of said lever i and said handle is adapted to eiiect the adjustment of the grinding wheelwith relation to said cots, a second supplemental frame pivoted to said' main frame, a motor mounted on said second sup-- plemental frame and operatively connected with said grinding wheel, and a link Vconnecting'said second supplemental frame with said lever where-

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