US957283A - Sanding and rubbing machine. - Google Patents

Description

H. WBSTPHAL.

SANDING AND RUBBING MACHINE.

PPLIUATION FILED JULY 14; 1909.

Patented May 10, 1910.

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-LHHOGRAPNERSMASNINGTON D C H. WESTPHAL. SANDING AND RUBBING MAGHINE.

APPLICATION FILED JULY14,1909.

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UNIT 1 SATS PATENT IFIQE HENRY WESTPI-IAL, 0F MANITOWOG, WISCONSIN.

SANDING AND RUBBING MACHINE.

To all whom it may concern:

Be it known that I, HENRY VVESTPHAL, a citizen of the United States, and a resident of Manitowoc, in the county of Manitowoc and State of Wisconsin, have invented certain new and useful Improvements in Sanding and Rubbing Machines, of which the following is a specification.

This invention relates to wood working machines and relates particularly to sanding and rubbing machines.

rlhe object of the invention is to provide an improved machine adapted for effectively sanding and rubbing surfaces, particularly wood surfaces, whether flat or curved.

To this end a machine of my invention consists of the various features, combinations of features and details of construction hereinafter described and claimed.

In the accompanying drawings, in which my invention is fully illustrated,-Figure 1 is a top plan view of my improved machine. Fig. 2 is a side view thereof; and Fig. 3 is an enlarged sectional elevation thereof on the line 3 3 of Fig. 2.

The operative parts of my improved machine are mounted on a suitable framework, consisting, as shown, of longitudinal frame members 1 and 2 supported adjacent to their ends upon frame members A, A', each consisting of upright supports 3 and 41 connected adjacent to their upper and lower ends by transverse frame members 5 and 6.

The work to be sanded or rubbed, as a table top or the like, indicated at B, is adapted to be supported upon a suitable table, indicated as a whole by C, which is mounted so as to be freely movable transversely of the machine. Said table C may be of any suitable construction, consisting, as shown, of boards or slats 7 rigidly connected by cleats 8 consisting, as shown, of angle bars, a flange of each of which eX- tends at right angles to the under side of the table C. IVhile my invention contemplates mounting the table C in any desired or approved manner to provide for necessary movement thereof transversely of the machine, I prefer to support the same by means of antifriction or roller bearings', so as to permit movement of said table with the least possible effort. As shown, said roller bearings are formed by grooved wheels or rollers 9 comprising two series mounted on rods or shafts 10 and 11, respectively, said rollers 9 running upon suitable tracks on the ma- Specication of Letters Patent.

Application filed July 14, 1909.

Patented May 19, 1919.

serial No. 507,459.

chine frame formed, as shown, by the upturned flanges of angle bars 12 and 13, the angle bars 12 being secured directly to strips or bars 14 secured to the end frame members A, A and the angle bar 13 to a horse 15 supported midway between said frame members A, A. The grooves in the wheels or rollers 9 engage the edges of the projecting flanges of the angle bars 8 projecting downwardly from the under side of the table C and also the edges of the upwardly turned fianges of the angle bars 12 and 13. The-tracks formed by the angle irons 9, 12 and 13 are made of proper length to provide for desired transverse movement of the table C, the movement of said table being limited by suitable stops consisting, as shown, of the downwardly turned ends 16 of the angle bars 8 and the upwardly turned ends 17 of the angle bars 12 and 13.

The rubbing agencies comprise any desired number of blocks 18 supported at the free ends of supporting arms 19 so as to be freely movable in all directions, as by universal joints 20. The supporting arms 19 are pivotally connected to a head 21 mounted so as to reciprocate lengthwise of the ma-v chine, in or upon suitable guides on the machine frame. As shown, said guides consist of parallel rods 22 the opposite ends of which are secured in suitable bearings on the upper frame members 5 of the end frames A, A of the machine, as shown, in pillow blocks 23 secured to said frame members 5. The guide rods 22 are located above the table C and the suporting arms 19 are of such length that, in use, they will extend downwardly at a slight angle to the horizontal, say 15 de* grecs, so that the blocks 18 will bear upon the work B with a pressure corresponding substantially to their own weight and the weight of the supporting arms 19, both said blocks 18 and the arms 19 being preferably made of metal, as cast iron. For most kinds of work, the surfaces of the blocks 18 which bear upon the work B, will be padded, my invention contemplating the use of any desired or approved form of pad, which need not, therefore, be described in detail.

To provide for varying the pressure of the blocks 18 upon the work B, either by inn creasing or decreasing such pressure above or below the normal pressure produced by the weight of said blocks and of their supporting arms 19, as may be desirable for doing different kinds of work, weights are preferably applied to said blocks in such manner that they may be adjusted to either increase or reduce the pressure of said blocks and of their supporting arms due to their own weight. As shown, said weights are applied in the following manner :hSecured to the head 21 are upright standaids 24 pivoted to which between their ends so as to extend on both sides thereof, are levers 25 which are connected to the arms 19 by rigid links 26 pivoted to the levers 25 and the arms 19 at points remote from their points of pivotal attachment to the standards 24 and the head 21. The weights 27 are adapted to be "applied to either end of the levers 25 and to be secured in adjusted positions thereon by means of set screws or other suitable means. VVit-h the described construction it is obvious that when said weights 27 are applied to the levers 25 in front of their points of pivotal attachment to their standards 24, as shown in the drawings, they will operate to supplement the weight of the blocks 18 and their supporting arms 19 and thus increase the pressure of said blocks on the work, whereas, when applied to the opposite ends of said levers, said weights will counteract in part the weight of said blocks 18and their supporting arms 19 and thus reduce the pressure of said vblocks 18 on the work.

Reciprocating movement is adapted to be imparted to the head 21 lengthwise of the guide rods 22, by means of suitable driving connection with a source of power, not shown, which will operate, in an obvious manner, to impart a corresponding reciprocating movement to the blocks 18 lengthwise of the table C and of the work B supported thereon.

As shown, the means for imparting reciprocating movement to the head 21 is as follows At-tached to said head is a chain belt 28 which passes around sprocket wheels 29 and 30 rotatably mounted at opposite ends of the machine frame, the sprocket wheel 30 being secured to rotate with a shaft 81 rotatably mounted in suitable bearings on the machine frame. The upper lap of said chain belt 28 is preferably supported'by an idle sprocket wheel 82 rotatably mounted at the upper end of rigid standards 33 on the machine frame. Secured to rotate with the shaft 81 is a gear 34 which meshes with a pinion 35 secured to a shaft 36 mounted in suitable xed bearings on the machine frame. Rotation in opposite directions is adapted to be imparted to the shaft 86 and from it to the shaft 81 by means of belts, comprising an open belt 37 and a crossed belt 38 adjusted to pulleys on said shaft 3G and on a shaft 39 rotatably mounted in bearings on the machine frame, said pulleys comprisinga pulley 40 which is tight on the shaft 36 and pulleys 41 on each side of said pulley 40 mounted to rotate freely on said shaft 86, and a. tight pulley on the shaft 89. The shaft 39 may be driven by means of direct connection with a source of power, but to provide for varying' the rate of travel of the head 21 and thus of the blocks 18, I prefer to drive same directly from a shaft 42 rotatably mounted in suitable bearings on the machine frame by means of a belt 48 adapted to be adjusted to cone pulleys 44 and 45 secured to the shafts 39 and 42, respectively. On the shaft 42 are tight and loose pulleys 46 and 47 to which a ydriving belt connecting the same with the source of power, as a line shaft, is adapted to be adjusted.

The machine is adapted to be reversed to cause the head 21 andthe blocks 18 to travel in opposite directions, by suitable means consisting, as shown, of a lever 48 pivoted on the machine frame, which controls a slide rod 49, pins on which embrace opposite sides of the belts 87 and 38 for shifting said belts from the tight to the loose pulleys and vice versa, as may be desired, in a familiar manner. As shown, said lever 48 is a bell crank lever the free end thereof projecting toward the side of the machine on which the operator will stand, so that it may be conveniently grasped and operated by said operator.

In addition to the manual control of the machine by the lever 48, means are also provided for automatically shifting the belts 87 and 38 to reverse the direction vof travel of the head 21 and blocks 18, when said blocks 18 reach the limit of their travel in either direction. As shown, said means consist of a slide bar 50 mounted in suitable slide bearings on the machine frame, as shown, on the longitudinal frame member 1, so as to be movable in both directions. Secured in said slide rod or bar 5() is a pin 51 which engages a slot 52 formed in the lever 48', whereby movement of said Slide rod or bar 5() will impart pivotal movement -to said lever 48 to shift the belts 87 and 88. 'Secured to the slide bar 50, preferably by means of set screws so that their positions on said bar may be conveniently adjusted to vary the travel ofthe head 21 as may be desired, are dogs 58 which project into the path of travel of rigid portions of the head 21 as the same moves in opposite directions. With the described construction it is obvious that the machine will be automatically reversed whenever the head 21 engages either of the dogs 53.

The operation of the machine is as follows Depending upon the kind of work to be done, a sheet of sand paper or of suitable soft material, as felt, is secured to the under surfaces of the blocks 18; the workB placed on the table C of the machine; and the dogs 58 on the slide bar 50fadjusted so that the travel of the blocks 18 will correspond with the length of the surface which it is desired to sand or rub. If desired, the work B may be secured to the surface of the table C, but this will not ordinarily be necessary, as the weight of the work will ordinarily be sufficient to hold it in position. The machine is then started, causing the blocks 18 to move back and forth over the surface of the work B and the table C is moved slowly back and forth by the operator so that all parts thereof will be subjected to the action of said pads 1S, this being continued as long as necessary or desired.

There the work is to be rubbed or polished, oil and powdered pumice will be applied to the surface of the work in the manner now common. Said oil and pumice may be applied directly to the pads on the blocks 18, which are of absorbent material, or may be applied directly to the work in the first instance, being absorbed by the pads on said blocks until said pads become saturated, after which it is only necessary to add suflicient oil to prevent said pads from drying out.

A particular advantage of my improved machine is its adaptability for rubbing and finishing not only plain but curved surfaces, as curved pew backs and the like. This advantage is due to the manner of supporting the rubbing blocks 18, whereby they have a relatively wide range of vertical movement as compared with any other machines for this purpose of which I have any knowledge, and exert a substantially uniform operative pressure on the work in all positions.

I claim 1. In a machine of the type described, the combination of a head, guides on which said head is movable lengthwise of the machine, a block or blocks connected to said head so as to move therewith and to be freely movable toward and from the work independently of said head, through a relatively wide range of movement and with a practically uniform operating pressure and means for imparting reciprocating movement to said head together with said block or blocks, substantially as described.

2. In a machine of the type described, the combination of a head, guides on which said head is movable lengthwise of the machine, an arm or arms pivoted to said head, a block or blocks pivoted to said arm or arms, and means for imparting reciprocating movement to said head, substantially as described.

3. In a machine of the type described, the combination of a head, guides on which said head is movable lengthwise of the machine, an arm or arms pivoted to said head, a block or blocks pivoted to said arm or arms and means for varying the operative weight of said block or blocks, said means comprising a lever or levers pivoted to said head, a link or links connecting said lever or levers to the arm or arms to which said block or blocks are pivoted, and a weight or weights applied to said lever or levers, substantially as described.

1. In a machine of the type described, the combination of a head, guides on which said head is movable lengthwise of the machine, an arm or arms pivoted to said head, a block or blocks pivoted to said arm or arms and means for varying the operative weight of said block or blocks, said means comprising a lever or levers pivoted between their ends upon said head, a link or links connecting said lever or levers with the arm or arms to which said block or blocks are pivoted, and a weight or weights adapted to be applied to said lever or levers at opposite sides of their pivotal points, substantially as described.

In testimony, that I claim the foregoing as my invention, I aiiiX my signature in presence of two subscribing witnesses, this 9 day of July, A. D. 1909.

HENRY VESTPHAL.

lVitnesses:

R. II. MARKHAM, IRMA SCHULTZ.

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