US980053A - Grinding and polishing machine. - Google Patents

Description

J. C. BLEVNEY & J. HAUSMAN.

GRINDING AND POLISHING MACHINE.

APPLIGATIDN FILED MAY 2o, 1909.

Patented Dec. 27, 1910.

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J. C. BLBVNEYL J. HAUSMAN. GRINDING AND POLISHING MACHINE.

APPLICATION FILED MAY 20, 1909.

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J. (LIBLEVNEY & J. HAUSMAN.

GRINDING AND POLISHING MAOHINB.

` APPLIOATION FILED Marzo, 1909.

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lNTTED STATES PATENT OFFICE.

JOHN C. BLEVNEY AND JOHN HAUSMAN, OF NEWARK, NEW JERSEY, ASSIGNORS T ATHA TOOL COMPANY, A CORPORATION OF NEW JERSEY.

, GRINIDING AND POLISHING MACHINE.

T 0 all whom it ma/y concern:

Be it known that we, JOHN C. BLEVNEY and J oHN HAUSMAN, citizens of the United States, and residents of Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Grinding and Polishing Machines, of which the following is a specification.

This invention relates to grinding and polishing machines and has particular' reference to a machine for grinding or polishing small articles.

In the present embodiment of our invention we have illustrated the machine as used for grinding the sides of a hammer, but it is to be understood that other articles may be ground or polished thereby.

Some of the objects of our invention are to provide means for grinding the articles evenly; to provide means for ready, accurate and line adjustment of the abrasive means; to provide work holders in such number and of such construction that a plurality of articles may be ground at one time, and that the articles may be readily inserted and removed from a holder; also to rovide means for producing a general and individual pressure of each article against the abrasive material.

With this end in View, the invention comprises such parts and combinations thereof as are hereinafter set forth, and the novelty of which is pointed out in the claims.

Reference is made to the yaccompanying drawings forming part of this application, and in which the same reference character indicates the same part in the several views.

Referring to the drawings: Figure 1 is a side or front elevation of the machine embodying our invention, showing only one work holder connected thereto and the article to be ground, in this case a hammer, out of contact with the abrasive belt. Fig. 2 is a plan view of the machine. Fig. 3 is a view of one end thereof. Fig. 4 is a view of the opposite end. Fig. 5 is a detail view of a work holder, the bar for supporting the same being in section and taken on line 5 of Fig. 2. Fig. 6 is a front view of the work holder. Fig. 7 is a detail sectional view taken on line 7 of Fig. 2. Fig. 8 is a detail view of the means for adjusting the abrasive belt. Fig. 9 is a detail view showing the connection between certain of the Specification of Letters Patent.

Application filed May 20, 1909.

Serial No. 497,332.

parts of said adjusting means. Fig. 10 is a View of the article to be operated on.

The part marked 1 on the drawing represents the frame Work of the machine.

2 is a driving shaft to which power is applied in any suitable manner, as by a belt running over the pulley 3 secured to said shaft. Secured on this shaft 2 is a pulley 4 from which another pulley 5 is driven by the belt 6, which passes under the idler 7. The pulley 5 is secured on a shaft or stud 8 to which is also secured another pulley 9. 10 is another pulley and over the pulleys 9 and 10 passes the backing belt 11. Over the pulleys 9 and 10, outside of said backing belt and over a pulley 12 passes an abrasive belt 13.

l/Ve provide means for automatically producing tension on the backing and abrasive belts by movement of the pulleys 10 and 12, and also means for adjusting these pulleys so that the position of the two belts with reference to the surface of the pulleys may be varied or adjusted. The means for performing these functions are the same in the two pulleys 10 and 12 and a description of one will suttice for the other. Ve will describe the said means as applied to the pulley 12. This pulley is mounted loosely on a stud 14 which is secured to a ring or disk 15 having an arm 15u. This disk is provided with lugs 15h which mate with a lug 17a on a slide 17, and to which it is pivoted by the pin 16. The slide 17 moves longitudinally in a guide 18. Between the free end of the arm 15a and the guide 18 is a small hand wheel 19 which is mounted on a short stud 19, one end of which bears against the free end of the arm l5a and the other end screw-threaded into the guide 18. 20 is a spring interposed between the disk 15 and the face of the slide. This spring keeps the arm 15 in contact with the hub of the wheel 19. By turning this wheel 19 in one direction, the disk 15 is rocked on its pivot 1G against the tension of the spring 20 and moves the pulley laterally. When the wheel 19 is turned in the opposite direction it permits the spring 20 to move the disk accordingly and throws the pulley in that direction. From this it is seen that by operating the hand wheel 19 the plane of the pulley may be varied or adjusted so that the Patented Dec. 27, 1910. a

belt. is caused to ride nearer one edge than the other of the pulley.

Connected to the slide 17 is one end of a rod 21, the other end of which is screwthreaded into a sleeve 22. One end of another rod 23 is screw-threaded into the other end of this sleeve and the opposite end of said rod is pivoted to the free end of an arm 24, the two rods and the sleeve forming a t-urnbuckle by which the length of the rods may be adjusted. The arm 24 is secured to a stud or shaft 25 mounted in the frame. Also secured on this shaft is a lever 26 carrying a weight 27 which is adjustable thereon. down which tends to rock the stud 25, moves the lever 24 to t-he left and through the turnbuckle slide 17 is forced to the left7 and as the pulley 12 is mounted on said slide, said pulley is forced to the left and a yielding tension is produced on the abrasive belt 13. This tension can be nicely adjusted by turning` the sleeve 22 and adjusting the weight 27 on the lever 26.

In some cases it may be advantageous to adjust the pulley 12 horizontally. To accomplish this we provide the rear surface of the guide 18 with the lugs 1821 by which the said guide is pivoted by the rod 2S to lugs 29 on a plate 30 secured to the frame of the machine. Between the rear face of the guide 18 and the said plate 30 and above and below the pivot- 28 we locate the hand wheels 31 and 32 to which are secured the right and left hand-threaded studs 31a and 32a. By properly operating these hand wheels `the guide 13 can be adjusted horizontally on its 'pivot and consequently the pulley 12 will be adjusted accordingly. This adjustment of the pulley 12 will produce a line adjustment of the abrasive belt. The reason for thus providing for the adjustment of the pulleys in two different directions is found to be advantageous in operating on vwork of certain contour or surface; it permits such adjustment according to the condition of the abrasive belt and positions the belt so that it will grind all parts of the work evenly and accurately.

Supported on the frame of the machine and at each end thereof are the bearings 33. Journaled in each of said bearings is a shaft 34 having an eccentric portion 35. At the oppositeend of each of these shafts is secured a worm-wheel 36.

37 is a longitudinal rod mounted in the frame. At or near each end of said rod is a worm 37a which meshes with the worm- Wheel.

38 is a hand wheel by which the shaft 37 is turned. When the shaft 37 is turned the eccentric portions 35 of the shafts 34 are raised and lowered, the said shafts 34 of course being` rotated through the worm and gears just described.

This weight pulls the lever 26 Mounted in the eccentrics 35 and adapted to slide longitudinally thereon are the brackets 39 which are connected by a rod 40 at the base thereof and a flat bar 41 at the top. These brackets are caused to reciprocate on the eccentrics as follows: Secured to the driving shaft 2 is a worm 42 which meshes with the worm wheel 43 on a shaft 44 to which is secured a crank 442L in which slides a gib 45 having a crank pin 46 secured thereto. By adjusting the gib in the crank 44 the throw of the crank pin is varied. Bolted to said crank pin is a bearing 47 to which are secured two rods 48. These rods are also secured to another bearing 49 which surrounds the pin 50 at the free end of an arm 51. The other end ofv this arm is rigidly secured to t-he rock shaft 52 which is mounted in bearings 53 at each end of the machine. Secured on this shaft near each of the bearings 53 is an arm 51a having a pin at the free end thereof which is surrounded by the bearing 51". 54 represents similar bearings which surround pins or studs 55 connected with the brackets 39 hereinabove referred to.

56 represents a pair of rods connecting each of the bearings 51b and 54. When the shaft 2 rotates through the mechanism just described the shaft 52 is rocked on its bearings and the brackets 39 are reciprocated longitudinally on the eccentrics 35 and transversely of the frame of the machine. By adjusting the connecting rods 56 the throw or amount of transverse movement of the brackets 39 may be adjusted or varied. Tn practice this transverse movement rarely exceeds three-eighths of an inch.

Having now explained the driving mechanism, the mechanism for adjusting the abrasive belt and the backing belt and the means for moving the brackets 39 and the work holder will neXt be described.

The bar 41 connecting the two brackets 39 is provided with a number of holes 60 in which the work holder may be suspended. Any number of these holders may be used7 depending upon the size of the machine. F or clearness in illustration, however, we

.have shown only one of these holders con" nected to said bar. The work holder here illustrated consists of a bifurcated arm 61 pivoted to the bar 41 by a bolt 62 passing through one of said holes 60. The lower end of this arm is provided with an opening in which is inserted a vertical bar 63, the lower end of which is turned at right angles to form a linger 64. Secured to the bar 63 is a pin 66 to which one end of a coil spring 65 is connected, this spring being connected to a pin 66a on the arm 61.

67 is a bracket having an opening therein through which projects the vertical bar 63. This bracket freely moves vertically on said bar. The bracket 67 is provided with slotted ears 68 to which are secured slotted jaws 69 by the bolts 70. A lever 72 is pivoted at 7 3 to a link 74 connected to the arm G1, and is connected to the bracket 67 by a pin 7 5. The free end of the lever 72 is provided with an adjustable weight 7G. The spring G5 tends to raise the bar G3 and with it the bracket 67. The weight, however, pushes the bracket down on' the bar 63, the lower end of said bracket resting on the pin GG. By this means all the parts forming the work holder are forced downwardly, the tension of the spring (S5, however, being such that it prevents the bar G3 from being forced. entirely out of the arm 6l. The spring and weight permit yielding vertical pressure of the work held by the holder against the abrasive belt. The backet (37 is provided with a lug 77 ending in a cylindrical part 7S. On either side of this part are fingers 79 which are secured to the clamp S9 fastened to the longitudinal rod S1 which reciprocates in bearings in the two end brackets 39 hereinabove referred to.

Secured to the shaft 44 is the cam drum 83 having a cam groove therein. VRunning in this groove is a roller S-l pivoted at one end of a lever 85. The other end of said lever is secured to a vertical rock shaft SG. On the upper end of this shaft is secured one end of a lever 87. To the free end of this lever is pivoted one end of a connecting rod 8S, the other end of which is adjustably pivoted in a slot 90 in one end of a lever S9 by a bolt 91. The lever 89 is pivoted intermediate its ends at 92. The end of the lever opposite the slot is pivoted at 93 to one end of a connecting' rod 94, the other end4 of said rod being pivoted to a clamp 95 secured to the reciprocating' rod 8l. Then the cam drum is rotated the roller moving in the cam groove will cause the rod Sl to reciprocate by means of the connections just described. The reciprocal movement of this rod S1 will cause the fingers 79 which are secured to said rod and are on each side of the lug 77, to swing the work holder.

The operation of the. machine may be brieflv set forth as follows: The article to be operated on, in this case the hammer 96 having an opening 97 therein, inserted in the work holder as follows: The lever 72 is raised carrying with it the bracket 67. This upward movement of the lever and bracket releases the bar G3 so that it is raised by the spring (35 until the upper end thereof strikes the bottom edge of the bar 41. The bracket G7, however, is raised until it strikes the lower end of the arm G1. This movement separates the jaws G9 from the finger 64 so that the hammer 97 can be inserted on the finger 64. The lever 72 is then released. The weight 7 6 forces the 'bracket G7 down until the jaws 69 come in contact with the hammer. The bracket and the bar 63 are forced down by the weight against the tension of the spriiig G5 until the hammer is in contact with the abrasive belt. The bracket 67 is raised by hand against the weight 7G and the finger G4 of the vertical bar G3 is inserted in the opening 97 of the hammer and the bracket is then released, whereupon the jaws (59 will g asp the hammer and will be held down by the weight 7G in the manner clearly shown in the drawing. The cushioning or backing belt 11 and the abrasive belt 13 are properly adjusted as to tension by adjusting the sleeves 22 and the weights 27. The position of these belts in relation to the surface of the pulleys are adjustable by proper movement of the adjusting wheels 31 and 32.

In order to prevent the ab 'asive belt and the cushioning belt from sagging between the pulleys 9 andV lO, and for the purpose of holding the belts to their work, we provide a backing plate or bar 57 which is secured to studs 5S adjustable in the cross-pieces 59. Next, the eccentrics 35 are adjusted by movement of the hand wheel 3S to raise and lower the brackets 89 carrying the bar 31 to which the work holder is pivoted so as to locate the work in. proper relation to the abrasive belt. The transverse motion of these brackets 39 is adjusted by the adjusting c ank 44 and gib 45 on the driving shaft 2 so that during the grinding or polishing operation the work will be moved transversely of the belt. The machine is now started, whereupon the ab asive belt will be moved over the pulleys. The transverse movement of the b 'ackets 39 will move the work transversely of the belt and the reciprocating movement of the rod 81 will cause the work to swing longitudinally of the-belt. This swinging motion is provided for articles with curved surfaces, such as a hammer, to be ground or polished so that all the curved surface of the article will be brought into proper contact with the abrasive belt. As one side of the hammer is ground or polished the bracket 79 is raised and the hammer is turned over so that the other side can be ground or polished. lVhen this side is finished another hammer is inserted. As stated above a number of these work holders may be pivoted to the bar 4l so that a number of hammers may be operated on at one time, one attendant feeding the machine, all the hammers or other articles being ground uniformly.

As many changes could be made in the above construction and many apparently widely different embodiments of my invention could be made without departing from the scope thereof, we intend that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

We desire it also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention, which, as a matter of language, might be said to fall therebetween.

Having now described my invention, what we claim as new and desire to secure by Letters Patent is:

l. In a device of the class described, a

frame, a series of pulleys connected to said frame, one or more of the pulleys being adjusted vertically and horizontally and means for yieldingly pressing said pulley in one direction, an abrasive belt passing over said pulleys, means for driving said belt, a bracket at each end of said frame, means for vertically adjusting said brackets, means connecting the brackets, work holders pivoted to said means, said work holders adapted to support a piece of work, and means for pressing the work holder yieldingly against the abrasive belt, and means for oscillating the work longitudinally of the abrasive belt.

2. In a device of the class described, a frame, an endless abrasive belt moving adj acent thereto, eccentric shafts mounted in said frame, a bracket on each of said shafts, means for moving said eccentrics, a bar connecting said brackets, a work holder pivoted to said bar, means for yieldingly pressing the work holder toward the abrasive belt, a reciprocating rod having a stop on each side of the work holder, and means for reciprocating the rod whereby the work holder may be swung longitudinally of the belt.

3. In a device of the class described, a frame, an endless abrasive belt moving adjacent thereto, eccentric shafts mounted in said frame, a bracket on each of said shafts, means for moving said eccentrics, a bar connecting said brackets, a work holder pivoted to said bar, means for yieldingly pressing the work holder toward the abrasive belt, a reciprocating rod having a stop on each side of the work holder, means for reciprocating the rod whereby the work holder may be swung longitudinally of the belt, and means for moving the work holder and adjusting the belt transversely of each other.

4Q. In a device of the class described, a frame, an endless abrasive belt moving adjacent thereto, eccentric shafts mounted in said frame, a bracket on each of said shafts, means for moving' said eccentrics, a bar conneet-ing said brackets, a work holder pivoted to said bar, means for yieldingly pressing the work holder toward the abrasive belt, a reciprocating rod having a stop on each side of the work holder, means for reciprocating the rod whereby the work holder may be swung longitudinally of the belt, and means for adjusting the belt transversely of the work holder.

5. In a device of the class described, a

frame, 'a series of pulleys connected to said frame and one or more of the pulleys being adjustable vertically and horizontally, a backing belt moving over certain of said pulleys, an abrasive belt moving over the pulleys outside of the backing belt, means for yieldingly moving certain of said pulleys to produce a yielding tension on the backing and abrasive belts, means for driving the pulleys, eccentric shafts mounted transversely of the frame, a wormegear connected to each of said shafts, a longitudinal shaft mounted in the frame having worms connected to the worin-gears on the eccentric shafts, means for moving the brackets t-ransversely of the belt, a bar connecting the upper ends of the brackets, an arm pivoted to said bar, a bar vertically adjusted in said arm, a work holder connected to said arm, a spring connected to said arm and workholder, a weight forcing the work holder toward the abrasive belt against thetension of the spring, a reciprocating rod located horizontally of the frame, stops secured to the reciprocating rod and extending on each side of the work holder, and means for reciprocating said rod.

6. In a device of the class described, a frame, a series of pulleys connected to said frame and one or more of the pulleys being adjustable vertically and horizontally, a backing belt moving over certain of said pulleys, an abrasive belt moving over the pulleys outside of the backing belt, means for yieldingly moving certain of said pulleys to produce a yielding tensio-n on the backing and abrasive belts, means for driving the pulleys, eccentric shafts mounted transversely of the frame, a worm-gear connected to each of said shafts, a longitudinal shaft mounted in the frame having worms connected to the worm-gears on the eccentric shafts, means for moving the brackets transversely of the belt, a bar connecting the upper ends of the brackets, an arm pivoted to said bar, a bar vertically adjusted in said arm, a work holder connected to said arm, a spring' connected to said arm and work holder, a weight forcing the work holder toward the abrasive belt against the tension of the spring, a reciprocating rod located horizontally of the frame, stops secured to the reciprocating rod and extending on each side of the work holder, a link secured to said reciprocating rod, a cam drum mounted on a shaft, means for rot-ating said drum, a lever pivoted in the frame and having a roller moving in said cam, and connections between said lever and said link whereby the said rod is reciprocated.

7. In a device of the class described, an arm having an opening therein, a bar movable in said opening, one end of the bar being adapted to support a piece of work, a stop to limit the movement of the bar in one direction, a spring connected to the arm and the bar, a bracket movable on the bar and having jaws to engage the work, a lever connected to the bracket and a weight connected to the lever to hold the jaws to the work.

8. In a device of the class described, a frame, pulleys connected to the trame, an endless abrasive belt moving over said pulleys, a work-holder, and means for moving said holder transversely and longitudinally upon the belt, and oscillating it in a vertical arc to successively bring` different portions of a rounded surface into operative contact with the belt.

V9. In a device of the class described, a frame, pulleys connected to the frame, an endless abrasive belt moving over said pulleys, means for holding the work in contact with the belt, including instrumentalities whereby the work is automatically moved bodily transversely of the belt and is oscillated longitudinally of the belt, said oscillatory movement being in a vertical arc and successively bringing diiterent portions of a curved surface intovcontact with the belt.

l0. In a device of the class described, a frame, a driving shaft, an endless traveling abrasive belt, a work-holder, and connections between the work holder and the driving shaft operative to impart movement to the work-holder in directions transverse to and longitudinally of the belt, and to cause one of said movements to be an oscillatory one in a vertical arc.

11. In a device of the class described, an abrasive belt and means t'or holding the work thereto, comprising a frame, means for moving the frame with relation to the belt, a work holder carried by said frame and mounted to swing in a vertical arc, and means t'or oscillating the work-holder in such are.

l2. In a device of the class described, a frame, a driving shaft, pulleys connected to the frame, an endless abrasive belt, a workholding frame, a work-holder pivoted thereon, and connections between the driving shaft and the work-holding frame, for moving the work upon the belt in transverse and longitudinal directions, includin instrumentalities whereby the work -ho ding frame is moved bodily transversely of the belt and the work-holder is rocked longitudinally ot' the same.

13. In a device of the class described, a frame, a driving shaft, pulleys connected to the frame, an endless abrasive belt, a workholding frame, a work-holder pivoted thereon, and connections between the driving shaft and the work-holding frame, for moving the work upon the belt in transverse and longitudinal directions, including instrumentalities whereby the work-holding frame is moved bodily transversely of the belt, a reciprocating rod slidable in said frame and having a stop on either side of the workholder and means for reciprocating said rod whereby the work-holder is swung longitudinally of the belt.

In witness whereof we have hereunto set our hands at the city, county and State of New York, this 6th day of May, 1909.

JOHN C. BLEVNEY. JOHN HAUSMAN.

In presence olf- J onN J. RANAGAN, ISABEL R. RICHARDS.

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