US743608A

US743608A - Rubbing and polishing machine.

Info

Publication number: US743608A
Application number: US13694602A
Authority: US
Inventors: Charles S Yarnell
Original assignee: MOORE CARVING MACHINE Co
Current assignee: MOORE CARVING MACHINE Co
Priority date: 1902-12-29
Filing date: 1902-12-29
Publication date: 1903-11-10
Anticipated expiration: 1920-11-10

Description

PATENTED NOV. 10, 1903.

C. SIYARNELL.- RUBBING AND POLISHING MACHINE.

' APPLIOATIUN YILBD Dnc. 29, 1902.

ssHBBTS-SHBBT 1.

Nov MODEL.

\ vgl N/neaoes 3 SHEETS-SHEET 2.

PATENTED NOV. l0, 1903,V

C.. S. YARNELL.

RUBBING AND 'POLISHING MACHINE.

APPLIGATIQN FILED DBG. 29. 1902.

no MODEL.

mi cams PETERS cn., mmou'rno.; wAsNlMGrou, n. c.

W/"n e ad e s PATBNTBD Nov. 10, 190s.

. G. S. YARNBLL, RUBBING AND PGLISHING MACHINE.

UWLICZAHIINV FILED DEU. Z9, 1902.

3 SHEETS-SHEET 3.

N0 MODEL.

No. 743,608. Patented November l0, IOS.

NrTED STATES PATENT CHARLES S. YARNELL, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO MOORE CARVING MACHINE COMPANY, F MINNEAPOLIS, MINNESOTA, A CORPO- nATioN oFMINNEsorA.

RUBBlNe AND PoLrlsHlNe MACHINE.

SPECIFICATION forming part of Letters Patent No. 743,608, dated November 10, 1903. Application filed December 29, 1902. Serial No. 136,946. (No model.)

To all whom it may concern: p Figs. 11 and 12 are details of the means for 5o Be it known that I, CHARLES S. YARNELL, securing the reciprocating heads to the opof Minneapolis, in the county of Hennepin, erating-cable. State of Minnesota, have invented certain In all ot the drawings, 2 represents the newaud useful Improvementsin Rubbingand frame of the machine,which consists, prefer- Polishing Machines, of which the following is ably, of asuitable base and two upright stand- 55 a specification. Y ards supporting a horizontal bed-plate carry- This invention relates to rubbing andpoll ing the operating parts of the machine. An ishing machines, and particularly to maadjustable Work-table 3 is supported upon l xo chines designed for rubbing and polishing suitable bearings 4 upon the standards of the surfaces of wood, although the machine is camachine,and this table is adapted to be moved o pable without reconstruction of being used horizontally beneath the working parts of the for polishing surfaces of other materials. machine. It is also preferably arranged to My present invention is designed particube vertically adjustable by suitable means. I5 larly as an improvement upon the rubbing (Not shown.) I employa polishing-belt and and polishing machine 'shown and described one or more reciprocating heads 5, said heads 65 in Letters Patent No. 685,328, granted Octobeing preferably of substantially the same Y ber 29, 1901, to Henry P. Gale; and the obconstruction as the reciprocating head shown v jects of my present invention are, lirst, to and described in the Gale patent, hereinbe- 2o improve the construction of the Gale mafore referred to. Ido not need, therefore, to chine by providing a supporting-belt and a describe the particular construction of the 7o polishing-belt with .a belt-tightener arranged `reciprocating heads. As here shown, these in conjunction with the polishing-belt,where heads'vare arranged upon a suitable vertiby the slack in the polishing-belt is taken up cally-adj ustable guide-bar 7, by means of z5 and the puckering or wrinkling of that belt which they may be raised or lowered, so as while in operation is avoided; second, to pron to bring them into or out of contact with the 7 5 vide improved means forreg'ulating the stroke polishing-belt. Any preferred construction of the reciprocating heads; third, to provide may be used for raising and lowering or means for reversing the travel of the polishguiding the reciprocating heads. go ing-belt. For applying power to the machine I pref- To these ends my invention consists generably arrange a driving-shaft 8, mounted in 8o erally in the constructions and combinations suitable bearings 9 upon the frame of .the malhereinafter described, and particularly pointchine and provided with a fast pulley and ed out in the claims. two loose pulleys 11. By means of straight In the accompanying drawings, forming and cross belts applied to these pulleys and part of this specication, Figure l is a front a suitable beltshifter the shaft 8 may be 85 elevation of my improved machine. Fig. 2 driven in either direction. The shaft 8 caris a plan view of the same. Fig. 3 is a detail ries a suitable pulley 12, that supports and section taken lengthwise of the driving-shaft. drives the polishing-belt. By reversing the 4o Fig. e is an enlarged section showing the driving-shaft and the pulleylf the movement belt-tightener arranged in connection with of the polishing-belt may be reversed at will. 9o the polishing-belt. Fig. 5 is a detailed ele- Arranged loosely upon the shaft 8 are the two vation showing the means for adjusting the loose pulleys 13, and between them is a clutch stroke of the reciprocating head. Fig. 6 is a 11i, provided with a suitable operating-lever horizontal section `on line 6 6 of Fig. 5. Fig. 15', and this clutch is adapted to secure either 7 is an enlarged detailed section on line 7 7 of the pulleys 13 tothe driving-shaft 8. Belts 95 of Fig. 5. Fig. 8 is a detail on line 8 8 of 15 are arranged upon the pulleys 13, and Fig. 7. Fig. 9 is a detail ou line 9 9 of Fig. these belts extend to a shaft 16, provided with 8. Fig. 10 is a section on line 10 lO of Fig. 6. pulleys 17 and 18which are engaged by said belts 15. (See Fig. l.) The pulley 17 is considerably larger than the pulley 18, so that when the clutch 14 is in engagement with one of the pulleys 13 the shaft 16 is driven at a greater speed than when Ithis clutch is in engagement With the other' pulley 13. The shaft 16 is also provided with a pulley 19, and a belt 20 engages this pulley and extends to a pulley 21 upon a shaft 22. The pulley 21 is loose upon the shaft 22; but it may be connected therewith by means ofa suitable clutch 23, arranged to be operated by a rod 24. The rod 24 may be operated by any suitable means-such, for instance, as a suitable treadle. The shaft 22 is provided With a pinion 25, that engages with a gear 26 upon a shaft 27, and this shaft is provided With a pinion 28, which engages a gear 30 upon a shaft 29. The gear 30 is provided With a crank-pin 31, to which is connected a rod 32, which extends to a crank-arm 33, arranged upon a rockshaft 34. (See Fig. 7.) The rock-shaft 34 is mounted in bearings 35 upon the frame of the machine and carries at its opposite end a slotted crank-arm 36. A threaded shaft 37 is mounted in bearings in the slotted crankarm 36, this shaft 37 being provided with a beveled pinion 38, connected with a similar pinion 39 upon a shaft 40, arranged Within the rock-,shaft 34, said rock-shaftvbeing made hollow to receive the shaft 40. A crank-pin 4l is arranged upon a block 42, and this block is arranged Within the slot in the crank-arm 36. Arranged within the block 42 is a nut 43, that is engaged by the threaded shaft 37. By turning the shaft 37 the block 42 is adjusted lengthwise of the crank-arm 36, and thereby the crank-pin 4l is moved nearer to or farther from the center of the rock-shaft 34, and hence the stroke of said crank-pin is shortened or lengthened. A rod 44 is connected to the crank-piu 41 and has its opposite end connected to a rocking toothed sector 45, which is in engagement With a pinion 46 upon a shaft 47, carrying the large pulley 48. A cable 49 is arranged upon the beltpulley 48and has its opposite ends secured thereto. This cable passes over the idler-pulleys 50. The reciprocating heads 5 are connecte'd to the cable 49, preferably by the hookbolts 49. (See Figs. 4 and 12.) By means described power will be applied through the shaft 8 and through one of the belt-pulleys 13 and belt 15 to the pulley 21, and when this pulley is clutched to the shaft 22 said shaft will be driven. The speed at which the shaft 22 is driven will depend upon which of the belt-pulleys 13 is connected to the power-shaft 8. From the shaft 22 power is applied to the gear 30 upon the shaft 29 and through the rock-shaft 34 and crank-arm 36 to the rocking sector 45 and to the shaft 47, carrying the pulley 48. It will be noted that by this means the shaft 47 is given an oscillating movement, and by this means through the cable 49 the heads 5 will be reciprocated. As these heads are above the polishing-belts and as they are arranged to be brought in contact with the inside of said belt and to press said beltupon its Work, the adjustment of the stroke of the reciprocating heads is very important,owing to the irregular shape of the articles that it is desired to polish. For operating the adjustable block 42, carrying the crank-pin 41, I prefer to pro'- vide the shaft with a sprocket-wheel 52, to which is connected a chain 53, that passes around under the sprocket-wheel 53, the shaft of which is provided with a hand-crank 55. The sprocket-chain 53 also preferably passes over an idler sprocket 56. By turning the hand-crank 55 the shaft 40 may be rotatedin either direction, and thereby through the threaded shaft 37 the block 42 may be adjusted toward or from the center of the rockshaft 34, and the movement of the sector 45, and consequently the stroke of the reciprocating heads, may by this means be quickly adjusted while the machine is in operation.

In polishing many articles, such as round or oval table-tops, it is necessary to adjust frequently the stroke of the reciprocating heads, and it is important to do this without stopping the machine. By this means the reciprocation of the heads is always under the control of the operator and may be regulated at Will. In some instances I prefer to employ two belts, one a supporting-belt 60,the other a sandpaper belt 61. The sandpaper belt is arranged outside of and is supported by the belt 60. I have found that Where these two belts are in close contact throughout,and particularly When the reciprocating heads are moving in the opposite direction to the movement of the belts, whatever slack there may be in the sandpaper belt will cause said belt to wrinkle and pucker between the reciprocating head and the supporting-pulley. This is objectionable, as it tends to destroy the sandpaper belt. For this purpose I prefer to make the sandpaper belt 61 longer than the supporting-belt and to provide a belttightener consisting of a pivoted crank-arm 62, carrying a pulley 63, that is arranged within the belt 61, the opposite end of the cranklever being engaged by a pivoted threaded rod 64, carrying a hand-wheel 65, and with a spring 66, arranged between the hand-Wheel and lever. By this means an adjustable spring tension is provided upon the sandpaper belt and any slack in the belt will by this means be taken up and the Wrinkling or puckering of the belt Will be entirely avoided.

I have found in polishing wood by means of a polishing-belt that when the polishing operation is nearly compelted there will be a slight fuzz occasioned by adhering fibers, which lie in the direction of the movement of the belt. For the purpose of removing these fibers I have -found it desirable to provide means for reversing the direction of travel of the polishing-belt and to do this While the reciprocating pressure-heads are in operation. I accomplish this in my present ICO machine by providing the driving-shaft with the fast and loose pulleys described and also providing straight and cross belts for operating said driving-shaft. By this means when the surface ofthe wood has been sufticiently polished the motion of the polishing-belt may be reversed and the belt can be given a few turns in the opposite direction, thereby removing any adhering fibers and leaving the surface perfectly clean and smooth. By securing the reciprocating heads to the cable by means of the hook-bolts 49 I am enabled to quickly release said heads and adj ust them to any desired position upon the cable. It will also be understood that through the clutch-pulley 23 I am enabled to stop the reciprocating motion of the heads at any time, so that if it is desired to operate the polishing-belt while the heads remain stationary this may be done. It will also be understood that by means of the two driving-belts 15 and the clutch 14 I am enabled to reciprocate the heads either at a fast or a slow speed. The

`short belts 15, extending from the pulleys 13 to the pulleys 17 and 18 upon the driving-shaft 16, preferably pass over the idler-pulleys 15', which provide means for securing a longer wrap upon the pulleys 17 and 18.

I claim as my invention- 1. The combination, in a rubbing and polishing machine, with a suitable supportingbelt, of apolishing-belt arranged outside of said supporting-belt,a belt-tightener arranged between said belts and engaging said polishing-belt, and means for reversing at will the movement of said belts.

2. The combination, in a rubbing and polishing machine, with a supporting-belt, pulleys for supporting and driving said belt, a sandpaper belt arranged upon said supporting-belt, a belt-tightener arranged between said belts and engaging said sandpaper belt, and means for pressing the sandpaper belt to its work.

3. The combination, in a rubbing and polishing machine, with a suitable supportingbelt and means for mounting and driving said belt, of a sandpaper belt arranged outside of said supporting-belt, a belt-pulley arranged between said belts and engaging said sandpaper belt, means engaging said supportingbelt and thereby pressing the sandpaper belt to its work, and means for reversing at will the movement of said belts.

4. The combination, in a rubbing and polishing machine, with a suitable supportingbeltand means for mounting and driving said belt, of a sandpaper belt arranged outside of said supporting-belt, a belt-pulley engaging said sandpaper belt, means engaging said supporting-belt and thereby pressing the sandpaper belt toits work, and means for reversing at will the movement of said belts.

5. The combination, in a rubbing and polishing machine, with a rubbing or abrading -means for reversing at will the movement of said belts.

7. The combination, in a rubbing and polishing machine, with a polishing-belt, of a reciprocating head arranged to engage said belt and press it to its work, suitable mechanism foi-.reciprocating said head, and means for regulating the throw of the head Without stopping the machine, substantially as de-v scribed.

8. The combination,with the polishing-belt, of a reciprocating head, suitable gearing for operating said head, a rock-shaft provided with a crank-arm having a crank-pin and forming a connecting means insaid gearing, and means for adjusting the crank-pin on said crank-arm, substantially as described.

9. The combinatiomwith the polishing-belt, of the reciprocating head, gearing for operating said head, the rock-shaft 34 provided with the crank-

arms

33 and 36 forming a connecting member in said gearing, rods 32 and 44 connected to said crank-arms, and means for adjusting the crank-pin to which one of said rods is connected, substantially as described.n

10. The combination, with the polishingbelt, of the reciprocating head, the rock-shaft 34 provided with the crank-

arms

33 and 36, rods 32 and 44 connected to said crank-arms, a threaded shaft arranged in one of said crank-arms, a shaft passing through the shaft 34 and adapted to operate said threaded shaft, an adjustable block arranged upon said threaded shaft and a crank-pin upon said block to which said rod 32 is connected, substantially as described.

In witness whereof I have hereunto set my hand this 26th day of December, 1902.

CHARLES S. YARNELL.

In presence 0f- A. C. PAUL, C. G. HANsoN.

IOO

ieg,

IIC