US740329A - Work-holder for grinding or other machines. - Google Patents

Description

No. 740,329. PATENTBD SEPT. 29, 1903.

F. STICKER.

WORK HOLDER-FOR GRINDING OR OTHER MACHINES.

APPLIUATIOH FILED my 25, 19.02.

No MODEL. 7 Z-SREBTS -BHEET 1- WITNESSES.- 7

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PATENTED SEPT. 29,1903.

F. STIGKBR. WORK HOLDER FOR GRINDING OR 'OTHERMAGHINES.

APPLICATION FILED ROY. 25,1902.

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W/TNESSES:

[NI/EN TOR Tatented September 29, 1905;;

PATENT OFFICE.

FRANCIS STICKER, OF NEW YORK, N. Y.

WORK-HOLDER FOR GRINDING OR OTHER MACHINES.

SPECIFICATION forming part of Letters Patent No. 740,329, dated September 29, 1903. Application filed November 25, 1902. Serial No. 132,761. (No model) I To all whom, it may concern.-

Be it known that 1, Farmers STIOKER,Of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Work-Holders for Grinding or other Machines; and I do hereby declare the following to be a full, clear, and exact description'of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The primary object of this invention is to provide an improved Work-holder for grinding-machines adaptable also for all classes of machinery, such as lathes, milling-machines, drill-presses, 850.; and further objects are to provide a work-holder wherein the article held thereby may be bodily adj usted universally without disturbing its connection to the chuck spindle or shaft, to insure the proper positioning of the article while being ground, to allow of its being presented at any desired angle or in any desired direction, and also to adapt the fixture as a centering device for work held in a straight line or on angular lines.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims. a

In the accompanying drawings, Figure l is an elevation. Fig. 2 is a planview. Fig. 3 is a vertical sectional view on lines 3 3, Fig. 2. Fig. at is a diagrammatic view showing the use of my holder in the grinding of a tapered reamer.- Fig. 5 is a diagrammatic view showing the shaft or spindle in reversed positions. Fig. 6 is another diagrammatic view showing the use of a stationary finger for retaining the work in proper position. Figs? and 8 are'diagrammatic' views showing the use of my device for centering the work. Fig. -9 is an elevation of the parts tilted.

Referring to the drawings, 1 designates a base designed to be mounted on the movable portion of a work-table, so that, as is customary in this class of machines, the device as a whole may be shifted back and forth on the table.

2 is a normally upright spindle extended from a head 3, pivotally mounted by a pin 4 between two cheeks 5, extending upwardly from the base. In these checks are formed opposite curved slots 6 to accommodate a nutted bolt 7, passed through an opening in a lateral extension 8 of the head 3. This permits the head to be turned on its pivot, so as to adjust spindle 2 and hold it either perpendicularly to the base orat any desired point within the range of the movement of bolt 7 within slots 6. When in its normal perpendicular position, the spindle is locked by a retainingpin 9. A scale 10 is formed on the inner face of one of the cheeks 5 as a guide to the operator in the adjustment of the position of the spindle. The latter is threaded throughout its length and is preferably formed with alongitudinal groove 12 to accommodate the inner end of a pointer 13.

14 designates a bearing or housing for the work-holding shaft 15. At one side this bearing is connected to a box-16, inclosing an interioriy threaded sleeve 17, engaging the thread of spindle 2. V The upper end of the box has a recess to accommodate the flange of the sleeve, and the latter is engaged by an overhanging cap-plate 18, secured to the box. The sleeve is split longitudinally, (see dotted line, Fig. 3,) so that a set-screw 19, working in the side of the box, may tighten the grip of the sleeve on the spindle and also serve as a look. This is in addition to a spannernnt 20 on spindle 2, the function of which is to hold the box and sleeve tight at any desired point. The box may be held as against rotation While it is being adjusted vertically,

'and when in its normal position it may be held by a locking-pin 21, passed through coincident openings in the sleeve and spindle.

The pointer 13 extends over a scale 22 on the face of the box to indicate the extent of rotation in degrees as the box is turned horizo ntally.

On one end of shaft 15 is designed to be secured an ordinary chuck 23; but it will be seen a center may likewise be securedto this shaft when the work is to be done between centers. One end of this shaft is encompassed by the hub 2a of a pulley 25. A screw 26 serves to lock the pulley to the shaft, and the pulley itself may be locked to the bearing by a sliding pin 27 or a spring-finger 2S,

engaging any one of a series of notches When the pulley is locked totheshaft, the latter may be driven by a belt applied to the pulley. The pulley and shaft may be both locked in certain positions to control the position of the shaft. When so. locked, the shaft 15, together with the chuck and'work held thereby, may upon loosening screw 26 be bodily adjusted by axial turning independently of the pulley, and when the work has been brought to the desired position relatively to the grinding-wheel the pulley may then be again locked to the shaft, and being itself held as against movement the work will be firmly held during the grinding operation. Then, again, the position to be occupied by the work relative to the grinding-wheel may be indicated by the notches of the pulley, in which event the shaft, together with the chuck and the work, is adjusted to conform with the said notchesof the pulley.

In Fig. 4 I have shown adiagrammatic View of the use of my fixture in the grinding of a tapered reamer. In this form it is necessary to apply a belt to the pulley, and the latter being locked to the shaft 15 the work is rotated against the emery or grinding wheel,

the shaft for this purpose being turned by the adjustment of the box 16 on spindle 2- that is, by its partial horizontal rotation.

. In some classes of work-as, for instance, in grinding or backing off the flutes of a reamerthe chuck and the work may be held in proper position relatively to the grindingwheel by means of a spring-finger, (indicated at 30, Fig. 6,) which finger engages the flutes from the underside. In this arrangement the shaft and the work are not dependent upon the locking of the pulley to the shaftbearing for holding the work in proper position, the finger alone serving this purpose. In such instances, of course, the previous milling of the flutesv is required; but in the formation of certain designs regular or irregular in cross-section-for instance, squares or triangles-the same may be formed out of round or any shaped piece of metal without previous milling by the aid of notches in. the pulley (or a plate secured thereto) conforming to the angles of the various shapes.

In Fig. 5 I have shown the work-shaft in its two positionsthat is, reversed end for endwhich arrangement is highly desirable in conjunction with that class of work contemplated by the construction shown in Fig. 6, the operation of truing up work being done when the chuck is at the right-hand end of the shaft and the backing off when it is at the left-hand end. In both of these instances the holdingfinger is beneath the flutes, so that the grinding-wheel serves to keep the flute being operated upon tight down against the finger. All this work is capable of accomplishment without having to once remove the tool from the chuck, such removal constituting a very serious objection to work-holders heretofore in use, because removing and afterward again properly readj usting Work is a very delicate operation.

When the article being operated upon (herein called the work) is too big for the chuck or" too long to be easily handled thereby, instead of employing the chuck for securing the work to shaft 15 such shaft mayin conjunction with an auxiliary device be used for doing work between centers. In Fig. 7 I have shown a center 32 extending from the end of shaft 15 and engaging one end of the work, the other end of the work being supported by a center 33, mounted in an adjustable tail-stock, (not shown,) motion being communicated to the work from shaft 15 by two engaging dogs 35 and 36, mounted, respectively, on the centering-pin 32 and the adjacent end of the work. Thus the work is rotated between two centers, with the result that any taper may be formed on the work on account of the inclination thereof relatively to the horizontally-held shaft, the work rotating angularly thereto.

When straight work is to be done, the centers may be held in a direct line, as shown in Fig. 8.

From what has been said it will be seen that a device constructed in accordance with my invention is universal in its adjustments as well when the work is held stationary as when it is rotated or when it is held in a chuck or between centers and that no matter'what shape or form the tool is to be the work can always be brought in exactly the position wanted. My fixture is adapted not alone to grinding-machines, but for all classes of work, being applicable to lathes, milling-machines, drill-presses, &c. In connection with the grinding of tools the machine has been found of the greatest value by reason of the fact that once the work is secured in the chuck itis not necessary to remove it therefrom until the entire grinding operation is completed, it being possible to present the work to the grinding-wheel atany and every de- [CO I sired angle and in any and every desired di- I rection.

I claim as my inventionl. A device of the character herein described comprising a shaft-bearing, an upright forming an axial support for such bearing to permit of the horizontal turning there of, that is, at right angles to the upright, with the latter as the axis, such upright remaining stationary, means for vertically adjusting such bearing on the upright, and 'means for holding the latter perpendicularly or tilted sidewise, as set forth.

2. A device of the character herein de scribed comprising a shaft-bearing, an upright forming an axial support for such bearing, means for vertically adjusting the latter on the upright, means for holding the bearing in difierent positions when turned on such upright with the latter as the axis, and means for holding the-upright perpendicularly or tilted sidewise, as set forth.

3. A devicev of the character herein described comprising a bearing, a box extending from one side thereof, a base, a threaded spindle extending upwardly from the base, forming a support for such bearing, a sleeve fitted in said box and having an internal thread engaging such spindle, and means for holding the latter perpendicularly or at different angles relatively thereto, as set forth;

4. The combination with the base, of aspindle pivoted thereto at its lower end, means connected to the spindle for holding it perpendicularly or in different positions relatively thereto, a shaft-bearing mounted on the spindle and capable of being swung thereon with the spindle as its axis, and means for vertically adjusting such bearing on the spindle, substantially as set forth. 7

5. The combination withthe base having upper extensions formed with curved slots, of the spindle pivotally connected at its lower end to such base, a lateral extension carried by such spindle, and a nutted bolt passed through such extension andalso through said slots, a shaft-bearing mounted on the spindle and capable of being swung thereon with the spindle as the axis, and means for vertically adjusting such bearing on the spindle, substantially as set forth.

6. The combination with the base having upper extensions formed with curved slots, of the spindle having a head at its lower end, a pin on which such head is mounted between such extensions, said head having a lateral extension formed with an opening co-- incident with said slots, a nutted bolt passed through such opening and slots, a shaftbearing mounted on the spindle, and means for vertically adjusting the bearing, substantially as set forth.

7. In a machine of the character herein described, a shaft-bearing, means for adjusting the position thereof horizontally, vertically and angularly, a shaft mounted in such bearing, a pulley, means for detachably connecting such pulley to such shaft, and means mounted independently of the pulley for holding it while detached from the shaft to allow of fixing certain positions of the latter, substantially as set forth.

8. In a machine of the character herein de-' scribed, a support, a shaft-bearing, means for adjusting the position thereof horizontally, that is, when moved around said support with the latter as its axis, means for adjusting thevertical position of the hearing by moving it up and down on said support,

means for angular-1y adjusting the position of the bearing by tilting its said support, a shaft mounted in said bearin g having a workholder at one end, such shaft being capable of being reversed, end for end, a pulley, and means for detachably connecting such pulley to the shaft, substantially as set forth.

9. In a device of the character herein described, a bearing, a shaft mounted therein having a work-holder atzone end, an index attachment detachably engaging said shaft for rotating therewith, said shaft and the work-holder being capable of axial adjustment independently of said index attachment when. disengaged therefrom, and means for holding such index attachment while the shaft and work-holder are being axially adjusted, asset forth.

10. In a device of the character herein described, a bearing, a shaft mounted therein having a work-holder at one end, means detachably engaging said shaft for rotating therewith, and holding means for locking such latter means while, the shaft and workholder are adjusted axially, as set forth.

11. In a device of the character herein described, a shaft, a bearing therefor, a chuck on one end of such shaft, a pulley, or the like, detachably secured to said shaft, and locking means mounted on the bearing and designed to engage and holdthe pulley while the shaft and the chuck are axially adj usted independently thereof, the pulley being. again lockedto the shaft to hold the latter in fixed position after adjustment, as set forth,

In testimony whereof I have signed this specification in the presence of two subscrib iug witnesses.

' FRANCIS STICKER.

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