US856331A - Polishing-machine. - Google Patents

Description

PATENTED JUNE 11, 1907.

D. P. ARBURN. POLISHING MACHINE.

APPLICATION-FILED MAY 2, 1906 2 sums-311mm 1.

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D. P. ARBURN.

. POLISHING MACHINE. APPLIOATION FILED MAY 2,1906.

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A TTOR/VE Y5 DAVID E. ARBURN, OF EVANSVILLE, INDIANA.

POLISHING-MACHINE.

Specification of Letters Patent.

Patented June 11, 1907.

Application filed slay Z. 1906. Serial No. 314,881-

To all 11/77/9721, it may concern.-

Be it known that 1, DAVID F. ARBURN, a citizen of the United States, residing at Evansville, in the county of Vanderburg and State of 1ndiana,have invented a new and useful Polishing-Machine, of which the following is a specification.

This invention relates to polishing machines and is primarily designed for use in connection with woodwork especially furniture.

It is a further object of the invention to adapt the same for cleaning and smoothing out grooves, and also for polishing bowed or grooved work such as the fronts of dressers and other furniture.

\Vith these and other objects in view, the present invention consists in the combination and arrangement of parts as will be hereinafter more fully described, shown in the ac-v comp anying drawings and particularly pointed out in the appended claims, it being understood that changes in the form proportion, size and minor details may be made within the scope of the claims without de parting from the spirit or sacrificing any of the advantages of the invention.

In the drawings: Figure 1 is a side elevation of a polishing machine embodying the features of the present invention. Fig. 2 is a top plan view thereof. fig. 3 is a front elevation of the machine. fig-.4 is an enlirged sectional view on the line 44 of Fig. 1. Fig. 5 is an elevation of a modification. Fig. 6 is a sectional View on the line 66 of l ig. 5.

Like characters of reference designate corresponding parts in all of the figures of thedrawing.

For the support of the operating parts of i the present machine, there is a frame made up of astandard 1 rising from a suitable bed or base 2 which is bolted or otherwise ligidly secured to the floor. Below the top of the standard there is a substantially horizontal frame bar 3 rigidly secured to the standard midway of the ends of the bar by means of suitable fastenings 4 preferably bolts. Upon the ends of the frame bar are cross bars 5 and 6 which carry a table 7 at one side of the standard.

Upon the cross bar 6 and in alinement with the standard there is a suitable bearing 8 in which rotates a substantially horizontal drive shaft 9 projecting at opposite ends of the bearing and disposed transversely of the machine. That end of the shaft which is opposite the table is provided with a drive pulley 10 for engagement by a suitable drive belt 11 whereby power is applied to the machine. At the opposite end of the machine there is a bearing 12 in which is a stub shaft 13 carrying a pulley 14. The shaft 9 is pro vided with a pulley 15 alined with the pulley 1 1, and an endless abrasive belt 16 engages the pulleys 14 and 15 so as to be driven by the latter pulley. The upper ply of the belt 16 passes over a combined guide and former carried by the upper portion of the stand ard 1.

As shown in Fig. 4. of the drawings it will be noted that this former is 'a wheel or roller 17 mounted between the upper portion of the standard and a bracket 18 which is secured to the standard and is provided in its upper end and at its inner side with a socket or recess 19 to receive the antifriction roller 17. This anti friction roller is mounted to rotate upon the stud shaft 20 carried by the bracket 18 and having its outer end received Within the seat or bearing socket 21 inthe adjacent side of the standard. The top of the bracket is beveled downwardly and inwardly toward the anti friction roller 17, as shown at 22, and the top of the standard is similarly beveled or recessed as at 23, thereby forming spaces at opposite sides of the roller or former into which the edges of the abrasive belt 16 may be forced by concaved work when pressed upon the belt against the wheel as a support. By thisarrangement, the belt is conformedto the shape of the work so as to en gage all portions thereof and polish the same in an effective manner. By reason of the rotatable mounting of the member 1.7 it isrotated by the action of the belt and thereby reduces the wear upon the latter. In some instances, it ma y be desirable to have the periphery of the roller padded so as to present a yieldable support to the belt. To pad the roller its periphery is inclosed in a sheath 24 of chamois, leather or other flexible material, a suitable padding material 25 -may be employed within the sheath.

In lieu of the rotatable support, I contemplate using a non rotatable support, such as shown at 26 in Figs. 5 and 6 mounted in substantially the same manner as described for the roller, except that the member 26 is in the nature of a block having its lower flat edge lying against the bottom of the recess 19, thereby to prevent rotation of the member.

A suitable sheath 24 may be fitted to the 11pper edge of the stationary member 26 and suitable padding employed between the sheath and. the member. In each instance, the bracket 18 is seated in the recess 27 in one side of the standard and is rigidly connected to the latter by suitable fastenings 28.

Below the table of the machine there is a transverse shaft 29 mounted in a bearing 30 which is carried by the standard and is adjustable vertically through the medium of fastening 31. carried by the standard and re ceived in vertical slots 32 formed in the upper and lower flanges 33 of the bearing. This shaft projects a suitable distance beyond. the standard and is provided with a pulley 34 over which travels a drive belt 35 leading from a pulley 36 provided upon the drive shaft 9 between the pulleys 10 and 15. Upon the outer end of the shaft .29 is a polishing wheel 37 preferably of fine sandstone, said wheel being provided with a peripheral flange or tongue 38 to fit into the grooves of woodwork so as to clean out and smooth the same and is particularly desi ned for operation in the grooves of the sit es and ends, of drawer for the reception of the bottoms thereof. At the inner side of the polishing wheel 37 there is another polishing wheel 39 which is relatively small in diameter and is comparatively long for smoothing flat surfaces, the work being held against the wheel by hand and moved back and forth across the same. The wheel. 37 is removably held upon the shaft 29, say for instance by means of the nut 40, and is preferably removed when the polishing wheel 39 is in use.

Disposed above the table 7 is a vertically swinging arm 41 which is fulcrumed upon the adjacent side of the standard near the top thereof, as at 42, and is provided at its free end and upon its outer side with a bearing 43 in which rotates a stub shaft 44 projecting outwardly from the arm. A pulley 45 is fixed. upon this shaft so as to rotate therewith. and is engaged by an abrasive belt 46 which is driven by a pulley 47 carried by the adjacent end of the drive shaft 9. By preference, the pulley 45 is provided with a facing ,of felt or other yieldable material. An open up. standing lever 48 is located below the arm 41 in the same vertical plane thereof and .is fulcrumed intermediate of its ends upon the adjacent edge of the table as shown at 49, the lower end of the lever being in reach of a foot of the operator standing at the adjacent front end of the machine, its upper end lying in frictional engagement withthe under side of the swinging arm whereby the latter may be elevated by manipulation of the lever.

As best indicated in Fig. 1 of the drawings, it will be noted that the under side of the swinging arm has a downwardly inclined. and preferably concaved portion 50 with which the rounded or convexed upper end of the lever frictionally engages. When the lower end of the lever is pushed away from the operator, the arm will be elevated and the abrasive belt 46 thereby moved upwardly from the table. When the lever is pulled rearwardly or toward the operator, the swinging arm and the abracive belt will be lowered.

111 using the belt 46, the work may be placed upon the table beneath the belt, the latter having been previously elevated by means of the lever 48, after which the belt may be lowered into engagement with the work, the latter being pushed back and forth by hand upon the table so as to have all portions thereof actedupon by the belt. The entire weight of the belt and the arm 41 maybe brought to bear upon the work, or the arm may be partially supported by the lever 48 so as to apply only a portion of the weight to the work according to the character of the abrasive action desired. By reason of the fact that the arm 41 is capable of swinging vertically, the belt will automatically accommodate itself to'bowed or curved work, such for instance as fronts of dressers and other furniture. If desired, the work may be applied by hand to the upper ply of the abrasive belt 46' whenever such an operation may be desirable.

Having thus described my invention, what is claimed is:

1. The combination with a standard hav ing a recess of a bracket detachably secured within the recess and having an inner socket, a former secured within the socket and consisting of a body portion, a padded. sheath extending over the working face thereof, and an endless abrading belt supported by the former. l

2. The combination with a standard having a recess and a bracket secured within the recess and having a socket in its inner face; of a former secured within the socket and comprising a body portion and a padded sheath thereon, the standard and bracket being cut away adjacent opposite faces of the former, and an abrading belt supported upon and movable over the former.

In testimony that I claim the foregoing as my own, I have hereto afliXed my signature in the presence of two witnesses.

DAVID F. ARBURN.

Witnesses:

SAML CRUMBAKER, E. L. CRAIG.

ICYO

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