US1490631A - Sanding machine - Google Patents

Description

April 15 g 1924. 1,49%31 C. L. NEWKIRK ET AL SANDING MACHINE Filed Nov. '27, 1920 2 Sheets-Sheet 1 a yg 9W 5 WRNE y.

Apfil] 15 1924.

WW K, sv gfig d may 2 Sheets-Sheet 2 SANDING MACHINE C. L. NEWKIRK ET AL.

Filed Nov. 27 1920 and oil or ot Patented Apr. 15, 1924.

UNITED STATES 1,490,631 PATENT OFFICE.

CHARLES L. NEWKIRK AND SCOTT MOGOWAN, OI DAYTON, OH IO, ASSIGNORS TO THE CRAWFORD, MOGREGO'B AND CANDY COKYANY, OI DAYTON, OHIO, A CORPORA- DION OI OHIO.

sa mmo MACHINE Application and llbvember 27, 1920. ser al n. 426,750.

To all whom it may oonoem:

Be it known that we, CHARLES L. NEW- KIRK and Scorr McGowan, both citizens of the United States, residing at De on, in the county of Montgomery and tate of Ohio, have invented certain new and useful Improvements in Sanding Machines, of which the followin is a specification.

My invention re ates to improvements in rubbing and polishing machmes for rods, and is particularly adapted for sanding, rubbing and polishing wooden rods, such as golf club handle sha ts, billiard cues, chair stocks, bro'om handles and other like articles, but may also be employed for finishing or olishing metal articles, especially wherein ighly polished surfaces are desired, particularly after being plated.

The object of the invention is to simplify the structure as well as the means and mode of operation of such machines whereby they will not only be cheapened in construction, but will be efiicient in use, positive in operation, automatic in action, uniform in result, and unlikely to get out of repair.

In the finishing of golf club handle shafts,

billiard cues and like articles, it is customary after turning or otherwise shaping the shaft or red to reduce a smooth surface by rubbing it with sand paper, or other abrasives, thereafter applyin successive coats of filler material, and she lac, varnish, or other surfacing material, rubbing the surface briskl after each coat, with umice her dressing, and final polishing the finished product by rubbing it dry, or with oil, to frictionally induce a highly polished surface. These operations have usually been performed by hand, and involve great labor and expenditure of muscular efi'ort. Not only is the hand process slow, but the resulting dust is disagreeable and injurious to the workman, which together with excessive muscular effort required makesit difficult to secure and retain competent workmen, to perform the necessary hand operations. It is difiicult to secure uniform surfaces by manual operation, since there is a tendency to rub the rod or handle shaft more vigorousl at one point than at another, thereby pro ucing flattened or irregular surfaces.

The present invention is designed to overcome these difficulties by providing means i for actuating the rod or handle shaft uniformly both as to longitudinal and rotary. movement, and to apply equal and uniform pressure thruout the entire stroke.

. A further object ofthe invention is to provldc means for automaticall Y actuating the rod or handle shaft operate upon thru successive oscillatory steps alternating with its reclprocatory movement, and to. insure the successive rubbing or polishing stroke to .be effected thru uniform range or extent of parts and combinations thereof, and the mode of operation or their equivalents as hereinafter described and set forth in the claims.

Referring to the drawings, Fig. 1 is a top plan view of an assembled rubbing machine embodying the present invention. Fig. 2 is a side elevation thereof. Fig. 3 is a detail end view of the rubbing and material feeding apparatus. .Fig. 4 is a front elevation of the work engaging or pressure applyingjaws. Fig. 5 is a detail view of the mtermattently operated work rotating means, disclosed in Figs. 1 and 2. Fig. 6 is a detail view of a modification of this rotating means.

Like .parts are indicated by similar charactors of reference throughout the several v1ews.

In the preferred, but not necessarily the only embodiment of the invention, as disclosed in the drawings, 1 is a main frame or table, in this instance of wooden construction, upon which the operating parts of the apparatus are mounted. Transversely arranged at one end of the main frame or table is a power shaft 2, carrying at one end a drive ulley 3, and at its opposite end a disc 4 aving a wrist or crank pm 5 to which is connected a pitman or connecting rod 6. At its opposite end the pitman or connected l ingly held in posits endof the actuating ings 8 for the reciprocatory shaft 7, there is located a ratchet wheel 1O, which is splined upon'theshaft 9 for rotary movement therewith, but the shaft is capable of independent reciprocatory movement thru the ratchet wheel 10.v This ratchet wheel 10 may be mounted in any suitable manner to permit its rotary movement, but prevent axial movement with the shaft 7. In the present instance, the ratchet wheel has been shown provided with a peripheral groove 11, in which engagefingers or do 12, secured to the bearing 8. It is obvious that other methods of mounting this ratchet wheel may be employed. In this instance, the ratchet wheel is provided with serrations, or ratchet teeth upon its lateral face. These serrations or teeth are engaged by a pawl-13, ivotally mounted upon one endof an osci atory actuating lever 14, which in turn is pivoted to the to of a pedestal carried by the main rame 1. The pawl 13 is actuated by a retracting spring 16- into engagement with the ratchet teeth of the wheel 10 at all. times. The opged b 7 lever 1114 is ena y a cam 1 carrie upon t e rive s haft 2, with which the lever 14 is yieldengagement by a retracting spring 18. a, I

It will be obvious that as the drive shaft 2 is rotated the shaft 7 will be reciprocated to and fro thru the bearin 8, b means of the pitman 6, connected to t e wrist pin 5, upon the disc 4 and ateach rotation of the drive.

shaft and consequently each reciprocation of the shaft 7, the cam member 17 will enga the end of the lever 14, to oscillate suc actuating lever causing thepawl 13 to advance the ratchet wheel 10 thru a partial rotation thereby rotating the shaft 7 within .the bearing 8, and in the swivel head 9, in

7 addition to its reciprocatory movement.

' At its end the reciprocatory shaft 7 carries a chuck or work holder 19, which may be of any suitable or convenient type.- The rod or handle shaft 20 operated upon is engaged a in this chuck or work holder 19, and is reciprocated and rotated in unison with the shaft 7. v

Adjustably mounted upon the main frame 1, beyondthe end of the shaft 7, is a longitudinally adjustable carria 21, the adjustment of which is efiect by an adjusting screw 22. This carriage 21 com rises a frame slidintily mounted upon guides or ways 23, on frame 1, which are engaged .closed between such jaws.

- necte causing it to bear firml 'upo by a le bearings 24, secured to the underside 0 the carriage, which serve to keep the carriage alined with the main frame, andthe guides or hearing 23 thereon. Mounted upon this carriage 21 are one or more work engaging bodies which in this instance are shown as two relatively adjustable jaws 25 and 26. In the present instance tw o. airs of these work engaging jaws have 11 shown. I It is obvious, however, that more or less of these work engaging members may beemployed, de ending upon the length of the rod or sha is operated upon, and the efiective length of the stroke, of the reciproeating means. In the present instance the lower jaw 25 is stationarily mounted u n the carriage 21, while the upper jaw 2 is pivoted in cars or fin rs 27 projectin upwardly from the statlonary jaw 25. see relatively adjustable jaws 25 and 26 are provided with re istering grooves in their adjacent faces, t ru which the. rod or handle.

shaft 20 operated upon extends. These grooves, preferably though not necessarily are padded or provided with some resilient or yielding cushion 28, substantially surrounding the rod or handle shaft 20 enpivotall mounted jaw 26 is yieldingly drawn ownward by means of L-shaped bars 29, pivoted at 30 on opposite sides of the a justable jaw member, and extending downwardl below the carriage 21, where the ends of such links or bars 29 are interconnected by a transverse rod 31, to which is connected one end of a helical retracting spring 32, the opposite end of which is conto the downwardly extending arm 33, carried upon the carriage 21. By this means the springs 32, exert a constant pull upon the upper or adjustable "jaw member 26,

n the interposed rod or handle sha 20, but enabling 1t to yield against the tension of the spring 32, to compensate for enlar ement or variations of diameter of them 20. Toinsure the registry of the jaws 25 and 26 when closed upon the interposed rod or handle The upper or shaft 20, and to prevent their lateral displacement, the lower. jaw, 26 is provided with upward'extending guide fingers 34, be-

tween which the upper or movable jaw member 25 extends when in closed relation.

Interposed between the yielding pressure members or jaws 25 and 26, are oppositely ward the other, andtoward the rod. Such material is firmly pressed upon the work by the pressure of the work engaging jaws, and

' I20 dis osed sheets of work treating material,v

conforms to variations of size or diameter thru the yielding of the jaw 25 and the interposed cushions surrounding the rod or shaft within the registering channels or grooves of the engaging members. As the rod or handle shaft is reciprocated to and fro, intermediate such work treating material, such as sandpaper or fabric charged with pumice or pohshing material, it is r0- tated thru successive artial rotations, whereby the surface is uniformly treated by being sanded, rubbed or polished according to the material employed.

In applying stainor other liquid polish, a reservoir or container 35 may be mounted upon the carriage 31 as shown in Fig. 3, and a supply conduit 36 provided leading from said reservoir or chamber thru a passage-way 37 in the stationary jaw or work engaging body 25, and discharging thru the cushion within the rod receiving groove of the jaw, which in this instance would be of porous material. There will thus be afforded a constant supply of stain or liquid finishing or polishing material, automatically distributed and applied by rubbing,

as the rod or handle shaft is reciprocated thru the relatively movable jaws, and rotated during its reciprocatory movement.

To retract the movable ressure member or jaw 26, against thetenslon of its spring 32, to enable the removal of a finished job and the insertion of a succeeding article to be operated upon, the carriage 21 is provided with uprights or standards 38, in the top of which is journalled a rock shaft 39. The rock-shaft 39 carries rock arms 40, one for each pair of work engaging members or jaws. A link 41 connects the movable jaw 26 with the corresponding rock arm 40 upon the shaft 39. The shaft 39 is oscillated by means of a hand lever 42, thereby turning the rock arm 40 upwardly and rearwardly and drawing the adjustable pressure member or jaw 26 rearwardly about its pivotal connection. The rock arm 40 is capable of being moved slightly beyond a dead center, whereby the jaw or pressure member 26 will be held in its retracted position. This enables the work to be con- -veniently inserted and removed and the sheet of abrasive or polishing material to be adjusted in relation with the work to present unworn surfaces to each succeeding piece of work. For convenience the jaws or pressure members 25 and 26 have been provided with inturned ears or fingers 43, ad jaoent to their forward or free edges, beneath which the sheets or strips of abrasive or polishing or other work treating material is engaged, whereby such sheets of material are automatically separated, by tht retraction of the pressure or jaw membel 26, and are held in such separated relation while the rod or shaft is being removed and a new one replaced between such sheets of material. For ordinary operation, these sheets or strips of work treating material whether of polishing or abrasive character may be manually adjusted as frequently as they may become worn to present unworn surfaces to the work. However, there has been shown in Fig. 3 means for automatically feeding such sheets or strips of abrasive or polishin material. In this ,view, two rolls 45 an 46 of work treating material have been shown mounted in a suitable bracket 47 extending rearwardly from the carriage 21. The material is wound upon such rolls with its abrasive or work engaging surface outwardly, and so positioned in the support 47 that as the sheets are unwound, the work engaging surfaces of the treating material will face'one toward the other. The sheets or strips of work treating material pass from the res ective rolls 45 and 46 in contact one with t e other, thru feeding rolls 48 and 49, journalled in the upright or standards 38 upon the carriage 21. Secured to the trunnion shaft of one of these feed rollers 49 is a ratchet wheel 50. Pivoted upon such trunnion shaft adjacent to the ratchet wheel is an operating lever 51 carrying a pawl 52 engaging with the ratchet wheel 50. This operating lever 51 is interconnected by a link 53 with the adjustable work engaging member 26, whereby at each retraction of the pivoted pressure member 26 under the influence of the link 41 and rock shaft 39, the operating lever 51 will be oscillated thru the link 53 to transmit to the feed roller 49 a partial rotation, whereby the strip of working treating material of abrasive or polishing character will be automatically advanced from the supply rolls 45 and 46 intermediate such feed rolls 48 and 49, and between the ressure members or work engaging mem ers 25 and 26, in relation with which they are guided by the inturned guide fingers 43. Thus at each retraction of the work engaging or pressure applying members to insert a new piece of work, the work treating material is automatically advanced a short length sufiicient to present an unworn surface at the point of operation.

It will be understood that when the ap- I sha t 7.' As the shaft 7 approaches the fori the invention has been described in language ward limit of its stroke, the cone, shaped camshead 58 engages the lateral extension of the arm 55, thereby oscillating such arm about its pivotal connection, with the bracket 56 and causing the pawl 57 to advance the ratchet wheel thru a partial rotation, To support the extremity of the ac tuating lever 14, and revent undue v1- bration, the end of the ever is preferaltzlg thou h not necessarily mountedin a slot orrbifurcated guide head 59, .mounted on the frame 1 adj a'cent to the ratchet wheel 10.

In Fig.- 2, there has been shown a suetion or exhaust conduit 65), having a plurality ofbranches 61, provided with intakes 62, adjacent to the point of operation, upon the handle shaft or red. By inducing a suction draft thru this conduit by means of a suitable fan, all dust and particles removed by the abrasive will be automatically with drawn, thereby protecting the health and comfort of the workman. From the above description it will apparent that thereisthus provided a device of thecharacter described possessing the particular features of advanta before enumerated as desirable, but which obviously is susceptible of modification in its form, proportlons, detail construction and arrangement of parts without departing from the principle involved or sacrificing an of itsadvantages;

l Vhile in order to' comply with the statute more or less specific as to structural features, it is to' be "understood that the invention is not limited tq the specific details shown, but that the means and construction herein disclosed'comp'rise but one of 'sev-' scribed, a shaft, means for transmitting to eral modes of putting the invention into effect, and the invention is therefore claimed in any of its forms or modifications i-within the legitimate and valid scope of the apt pended claims.

Having thus described our invention, we claim: A

. 1. In a machine of the character dosaid shaft bothreciprocatory and riotar movement, means for en gmg the-{,Wo

- with said shaft,'and a pa r of jawsi ield- 'inglly engaging the work between-whit: the

wor is reciprocated and rotated by the actuation of said shaft.

2. In a rod rubbing and polishing machine of the character described, a work engaging member having opposing relatively movable work treating faces engaging the work throughout substantially its entire periphery and compensating by their relative movementfor variations of thickness of the werk, means for reciprocating the work to and from in relation with said en' frame, a rotary drive shaft and a recipro catory shaft mounted thereon at right angles to each other, a crank carried by the drive shaft, a pitman connecting the crank and reciprocatory shaft, a swivel head affording a connection between the itman and the reciprocatory shaft where y the said shaft may be rotated independent of its reciprocatory movement, a ratchet wheel splined upon the reciprocatory shaft through which the shaft reclprocates, an actuating pawl engaging the ratchet wheel and means for intermlttently actuatin the awl to advance the ratchet wheel an sha thru successive partial rotations, a work holding chuck carried by the reciprocatory shaft and work treating means engaging the ro carried in said chuck.

5. In a rod rubbing and polishing machine of the'character, described, a reciprocato shaft capable of rotary movement in a dition to its reciprocatory movement, means for reciprocatin the shaft and means for intermittently osci ating the shaft thru partial rotations; a'work enga ing body yieldingly surroundin the rof operated upon, one of said \mem rs being carried by- ,the reciprocatoit'ly shaft and the other being chine of the character described, a work 1 treating body engaging the .rod operated upon, and means for rotating and reciprocatin one of said: members in relation with the ot er including a recipiocatory shaft on which" one of, said mem rs ratchet wheel splined upon the shaft for rotary movement therewlth but independent of which the shaft reciprocates, an actuating awl for the ratchet wheel, and means carried upon the "shaft for intermittently actuating the pawl.

7. In a rod rubbing and polishing machine of the character described, a work treating body engaging the rod operated upon, and means for intermittently rotating one of said members and means for reciprocating one of said members intermediate the operation of said. rotating means is carrie a including a reciprocatory shaft on which one of said members is carried, a ratchet wheel ,splined upon the shaft for rotary movement therewith but independent of which the shaft reci rocates, a pawl engaging the ratchet whee an actuating lever by which the pawl is carried and a cam member moving in unison with the reciprocatory shaft engaging the actuating lever at a predetermined point in the path of travel of the reciprocatory shaft to effect a artial rotation of the shaft by means of said pawl and ratchet wheel.

8. In a rod rubbing and polishing machine of the character described, a work treating body yieldingly surrounding the rod operated upon, and means for rotating and reciprocating one of said members in relation with the other inc'ludin a reciprocatory shaft upon which one 0 said members is carried, and means for oscillating the shaft and reci rocating the shaft intermediate such osci lations.

9. In a rod rubbin and polishi machine of the character ascribed, a wor support capable of transmitting to the rod opera'ted upon .both reciprocatory and oscillatory movement, a pair 0 relatively movable jaws ieldingly actuated one toward the other, tween which the rod is moved, said jaws having facings of work treating material.

10. In a rod rubbin and olishin machine of the character ascribe a wor support capable of transmitting to the rod operated upon both reciprocatory and oscillatory movement, and a stationa work-engaging body surrounding thero and havmg a work treating inner face.

11. In a rod rubbin and olishin -machine of the character escribe a wor support capable of transmitting to the rod operated upon both reciprocatory and oscillatory movement, and a yielding work engaggaging the rod upon opposite sides and having a work treating face in relation with which the rod is reciprocated and rotated and resilient means tendingto press said blocks one toward the other .to enga e the rod thercbetween, against which the blocks are capable of spreading movement to compegsate for variations of diameter of the ro 13. In a rod rubbing and polishing machine of the character described, a work support capable of transmitting to the rod operated upon both reciprocatory and oscillatory movement, a retractable presser member bearing upon said rod, a strip of work treating material interposed between the rod and presser member, and means for automatically advancing the said strip of 'material by the retraction of the presser member.

14. In a rod rubbing and olishin machine of the character describe ,a wor support capable of transmitting to the rod operated upon both reciprocatory and oscillatory movement, a work engaging bod movable into and out of engagement wit the rod operated upon, a strip of work treating material interposed between the said en aging body and the rod, and automaticalf y operated feeding means to intermittently present a fresh surface of the work treating material to the rod.

- 15. In a rod rubbin and olishin machine of the character escribe a wor support capable of transmitting to the rod operated upon bothreciprocatory and oscillatory movement, a supporting carriage adjustable axially in re ation with the rod, a work en aging body carried by said carriage and having a work treating face in relation with which the rod is longitudinally and revolubly movable, said work engaging body being adjustable to. difi'erent oints in the range of movement of the rod y the adjustment of said carriage.

In testimony 7 hereof, we have hereunto set'our hands this 9th day of November A. D. 1920.

ES L. N'EWKIRKQ SCOTT McGOWA I y witn;

H B Cm!

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