US963523A - Wood-smoothing machine. - Google Patents

Description

' J. A. ORISHGRE.

WOOD SHGOTHEG MAGHREB. A nrmonxol nu Dsc: za, 1m.

Y Patented July 5,1911).-

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T. A. GBISHOBQ.' 700D BMGS;

armonica' zum nso. za, 1m.

-Pazend my 5, 1910.

l. .lblllftlsllclnlLL in,... Illu... I, 'gri lltirvll s JOSEPH A.. CBISMORE, OF BEBWEN, ILLINOI'S.

VOOD-SMOOTHING MACHINE.

Specification of Letters Batent.

Patented July 5, 1910.

Application le December 23, 1909. Serial No. 534,625. v

To all whom it may concern:

Be it known that I, Jessi-1r A. Cnrsrrone, a citizen of the United States, residing at Berwyn, county of Cook, State of Illinois, have invented a certain new and useful Iznprovement in vVood-Sliioothing Machines,

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and declare the foilowin to be a full, clear, and exact description e? the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawin which form a part of this specication.

lood used in the manufacture of furnitiire and for other high grade work does not leave the planer or other kIj-.ifed machine which smooths or shapes it with sufliciently smooth surfaces to permit it to be empio ed without further finishing operations. It as heretofore been customary to sand-paper such wood either by hand or by machinery. The hand process 1s tedious and expensive and it is almost impossible to prevent sharp corners on the wood from being rounded or marred. `Where the sandpapering is done by a machine the same difliculties are experienced unless the surfaces to he finished are simple plane surfaces.

The object of my invention is to provide a simple and novel machine for giving a smooth finish to surfaces regardless of their contour and without in any way destroying or altering the design.

A. further object of my invention is to provide a simple and durable abrading brush with which wood may be finished quickly and effectively.

The various features of novelty whereby miy invention is characterized will hereina ter be pointed out with particularity in the claims 5 but for a full understanding of my invention and of its objects and advantages reference may be had to the followin detailed description taken in connection wit i the accompanying drawings, wherein;

Figure 1 is an end elevation of a machine arranged in accordance with a referred form of my invention, the end of t e inclasing hood being omitted and a portion being broken away to show one of the brushes; Fig. E is a section taken at right angles to Fig. l approximately along a center line' Fi 3 is a perspective view on an enlarge sca e of one of the brushes and brush-holdsuc `ue san nen rolle or pressed so atd cause the ers; Fig. 4 is a view on an enlarged scale showing one of the brush elements before it is completed by twisting a number of strands together; and Fig. 5 is a view showing a completed brush element wherein a phtiaiity of strands have been twisted toe er.

g I have found that by distributing a numher of iexible cords or fibers u on and about a rapidly rotating member an rotating this member in proximity to a surface to be iinished, the cords or fibers, if coated with a fine abrading material, will produce a smooth finish regardless of the contour of the surface treated and will leave all corners sharp and distinct. I prefer to use tou h cord for this will last as long as any of t le abrading material is-left on it. An ordibe soaked in alu da garnet or the like an :wren-whe that wherein the abrading material lies not only on the surface of the cord but also wit in the interior thereof. This may convenientl be accom lished by making a cord of a p urality o strands, treating each strand before the group which is -to form the cord is twisted together. In this wa an abrading element is reduced which w' act ell'ectively at all tunes even though it should wear more quickly at one point than at another and even though it should be broken away at the end.-

In Figs. 4 and 5 I have shown a brush element A made of three strands each of which is indicated at a. One end of each of the strands may be left in its normal condition while the remainder of each strand is soaked in Glue and it is then covered or coated with iiixe particles b of some abradingI material. The several strands are then twisted together as indicated in Fig. 5 so that there 1s obtained a iiexible cord which contains abrading material distributed not only around the surface thereof but also throughout its entire interior. While this is a perferred form of brush element, individual strands or fibers coated only on their exterior surfaces may, of course, be ernployed. The brush elements may be made nmcer, is-

5 the purpose of prevsntin av 7 ceases in any desired lengths de ending upon the kind of brush whim is to lie built up therefrom. I prefer, however, for convenience and cheapness in manufacture, and also for Waste, to treat long cords a number 0i which may be grouped together and wound upon a spool, the free ends thereof being led to a suitable holder which unites them into a brush-like structure, the lofroup of cords being unwound from the spool as the free ends o? the cords are worn away.

In Figs. 1 to 3 I have illustrated a machine equipped with my improved brushes.

The machine consists of a revoluble drum C mounted upon a shaft D which is journaled in bearingsl E and E adjustable transvcrsely of the axis of the shaft. IIlle drum may be rotated by means of a pulley D or in any other suitable manner. In the arrangement shown the drum is provided with a series'of cylindrical openings c extending longitudinally therethrough adjacent to the peri hery thereof. Secured adjacent to' each of t ese openings about the periphery of the drum are brush holders F most clearly shown in Fig. 3. Each of these holders consists of a channelshaped member f and a cover platef which forms with the channel member a clamp-like structure. The cover is made deeper than the member f so that it projects outwardly therefrom. G represents a baclrin'y for the active abrading portions of the brush and this is preferably 35 made of a vrou or bunch of fibers stiffer than the abrading members. I have found that broom straws grouped together form a satisfactory backing. The broom straws or other elements are placed with one end in gainst displacement by means of the cover plate. The abrading members A are adapted to lie along theouter face of the cover member f in one or more layers and toextend out wardly far enough to overlie the outer end of the backing member. The backing member and the brush elements are, of course, made longl enough to project a considerable distance beyond the outer edge of the cover plate. The brush elements may conveniently be clamped in place by means of a toothed bar H which extends across the cover plate and is detachably secured thereto by means of bolts or the like la.. The inner -525 ends of the brush elements extend to spools I whichl are made to tit easily within the Openings c of the drum. The parts may conveniently be arranged so that the spools may be slid in place through the ends of the drum, they being held in place by means of large washers K secured to the ends of the drum bymeans of screws or bolts in a position to over-lao a portion of each of the Yspools. The washers preferably extend a far enough the clamping yar is placed in' in e position and the mac 1 i ready to begin its work. `When the ends f the brush ele ments become worn, the clamping bar may be loosened and more stock be unwound from the spools until the ends of the brush elements reach the desired point. The clamping bar is then locked in place and the machine may be operated until further wear occurs. I prefer to arrange the brush hold# ers approximately tangential to the drum so that the ends of the brushes will enaage with the surface arranged beneath the dipm during a considerable angle of rotation.

The brusn elements are ilexible and nnrestrained exce t by the bachin member so that they will1 enter eve ang e or undulatiou in a surface to be ished and, if the member to be finished be a moldin or panel narrower than the brushsome o the elements will ride along the s: 'e faces thereof so that not only is there e smoothing of the upper face, but also of the side edges.

In Fig. F; I have shown two moldings L-L in the act of being fed throu h the machine below the rotating drum. t will be seen that some of the brush elements extend along the side edges of the moldings while the others reach every portion of the upper surfaces. The drum may, of course, be made as long or as short as desired, de pending u on the particular work to be treated. Iii it is intended only to finish moldings the drum need, of course, be only a short one, while if table tops or other broad surfaces are to be finished the drum must, of course be longer.- In the same way the length of tl may be varied to suit the character of the particular work, as may also the thickness of the elements and the grade of abrading material employed.

In order to prevent the abradiug elements 1e projecting brush elements from working in between' the elements of the backing member, a thin sheet of flexible material. such as rubber or gauze or other fabric may be interposed between the abrading elements and the baclrin member. Such a device is illustrated at will be seen that while the presence of the member G prevents the abradin elements from beconnn intermingled witi the elements of the backing member, it does not interfere withthe individual operation of vin Fig. 3. -It

the elements of the backin member, to press the abrading element in ont of it toward 'the surface which is being finished.

If desired the entire machine ina be covered by a hood M into which lea s an exhaust pipe N, the nurpose of this arrangement being to wit dranr the line dust and the particles of abrading material which are loosened.

It will of course, be understood that m improved machine may be used indepen ently of or in conjunction with woodworking machinery of any character. If used in conjunction with such a machine it acts upon the material as it leaves the machine so that no separate feeding mechanism is required. Otherwise the material to be linished must be fed through my im roved machine by hand or by feeding mechhnism of some kind.

While I have described in detail only a single preferred form of my invention I do not esire to be limited to this one form, but intend covering all constructions and arrangements which fall in the terms einployed in the definitions of my invention constituting the appended claims.

What I claim 1. In a machine of the character described, a rotary member havin a plurality of brushes distributed about tige periphery thereof, each of said brushes comprising a group of flexible bcrs coated with an abrading material, together with a backing for each of the brushes composed of a group of stiffer fibers.

2. In a machine of the character described, a rotary member having a plurality of brushes distributed about the periphery thereof, each of said brushes comprising a group of flexible fibers coated on all sides with an abrading material, tovether with a backing for each of said brushes .composed of a group of stiffer fibers.

3. In a machine of the character de-- scribed, a rotary drum having a plurality of longitudinally extending openings arranged near the periphery thereof, spools in said openings, means for holding said spools in piace, a group of flexible bers coated with abrading material mounted on each of said spools, a holder projecting outwardly from the drum adjacent each of said openin and means for securing the free ends of said Y fibers to said holder.

4. In a machine of the character described, a rotary drum having a plurality of longitudinally extending openings arranged rear the periphery thereof, spools in said openings, means for holding said spools in place, a group of flexible fibers coated with abrading material mounted on each of said snools, a holder projecting outwardly from lexible iibeis covered with abrading mate' rial lying in front of the aforesaid fibers and extending somewhat beyond the ends thereof.

6. In a machine of the character described, a rotary drum havin# a series of brush holders extending from tue periphery thereof, a roup of sti bers sup orted in each of sai holders, a layer of ilexi le iibers coated with abradn material lying in front of each of said ho ders and extendingtcward the ends of the aforesaid bers, and a clam ing bar associated with said hold-er for clamping the flexible fibers thereto.

7. An abrading brush comprising a. group of flexible fibers coated with a finely divide abrading material and a backin composed of stiller fibers lying on one side of the aforesaid fibers.

8. An abrading brush comprising a gi'ou of flexible fibers coated with a finely divide abradinp,l material a backing comprising a group of stiler bers lying on one side of the aforesaid group, and a sheet of flexible material separating one group of libers from the other.

In testimony whereof, I sign this specification in the presence of two witnesses.

JOSEPH A. CRISMORE.

Witnesses:

WM. F. Fnnonnnnnicn, Roer V. Bnrncns.

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