US1617578A - Stone polisher - Google Patents

Description

Feb. 1B, 1927;

1,617,578 0. s. CUSHMAN STONE POLISHER Filed June 2, 1925 2 Sheets-Sheet 1 .C. S. C USHMAN Feb. 15,1921. 1,617,578"

7 STONE POLISHER Filed June 2, 1925 2 sheet -sheet:

Patented Feb. 15, 1927.

entree stares;

CHARLES S. CUSHMAN, OF BARRE, VERMONT.

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Application filed June 2, 1925. Serial No. 34,459.

This invention relates to new and useful improvements "in stone polishing devices, and particularly to rotary polishing devices.

The present application embodies improvements on my prior Patent 1,491,790, issued April 29, 1924, and my pending application Serial Number 737,116.

One improvement resides in the provision of novel means for moving the polishing element longitudinally of the surface of the governing of one by the other.

Other objects and advantages will be-apparent from'the following description when taken in connection with the accompanying drawings.

In the drawings:

Figure 1 is an elevation of the device in operative position with relation to a stone to be polished. I

Figure 2 is an elevation looking toward the left side of Figure 1, partly broken away.

Figure 3 is a top plan view of the same.-

Referring particularly'to the accompanying drawing, 10 and 11 represents a pair of parallel I-beams, properly supported and held in spaced relation. Disposed beneath these beams 10. and 11 is a carriage 13, which is supported from the lower flanges of said beams by the wheels 12. Extending upwardly from the carriage is an arm 15, on which are mounted the trolley wheels 13,

' and which engage with the trolley wires 14, which are supported in parallel relation to,

and adjacent one of the said beams. On the carriage 13 is mounted an electric motor 16, the shaft 17 of which is provided with a gear 18 meshing with a gear 19, on a counter-shaft 20, arranged adjacent thereto. On the other end of the counter-shaft 20 is formed a worm 21 which meshes with a worm wheel 22 carried by the upper portion of the vertical shaft 23, which is mounted on the carriage, at.14. On the shaft 23, above the worm wheel .22, are mountedfthe winding drums 24 and '25, and connected to these drums, and wound thereon in opposite directions, are the cables 26 and 27 the other ends of the cables being suitably anchored,

or securedadjacent the ends of the beams '10 and '11. Swiveled on the lower end of the shaft 23, below the carriage, is an L-shaped member 28, and carried by the horivzontal arm of said member is a horizontally extending arm 29, provided with a terminal stop collar 30. Enga'ged on this arm, for slidable movement longitudinally thereof, is a strap 31, which is connected with the hori-' zontal bar 32. Connected tofand depending from the'ends of these bars 32-are the cables 33, the lower ends'of which are connected to the ends of similar bar 34', whose intermediate portions are swivelly' connected to the upper end of the lug 35, of the casing of the motor 36, of'the stone polishing element 37 Connected to and extending between the cables 33, are the spacing bars 38, which serves to prevent twisting and tangling of the cables, during the operation of the machine- On the vertical shaft 23, between the lower and of the carriage 13, and the member 28, are the collector rings 39, which are e11- gaged by the brushes 40, carried'by the said which electric current is conveyed to the motor 36, of the'stone polishing element 37, electric conduits 41 beingprovided for conveyi'ng current from the trolley wheels 13 to the collector rings 39, and other conduits 42 being provided for conveying current from the trolley wheels to the motor 16.

' Upon starting'the motor 36, the polishing element 37 will be rotated on the surface of the stone,'in an axial direction, whereupon the'bars 34 will be'swung around with the result that a'twisting movement will be imparted to the cables 33, and transmitted to the upper bars 32, to exert a turning IIIOVQ'.

face of the stone. Thus the polishing element turns about its axis, and at the same time turns 111 an orbital path, which 1s cirmember 28, and through the medium of i cular, with the resultthat tliepolishing element will travel circularly and transversely of the surface of the stone.

I Before starting the machine, the-cable-26is securedat its outer end to a stationary element, not shown, whereby, as the motor 16 rotates this I cable will be wound on "the drum to draw v stone.

the carriage,-and the parts connected therewith, longitudinally of the stone to be h polished,- the other cableibeing loose. When thepolishing element has reached the end of thestone, the cable 26 (is-loosened, and the cable 27 secured to a stationary element,

whereupon the .saidcable 27 will be wound "on itsdrum, and the carriage, and associthe; switches; and the cable ends Ifdesired, ;the motor 16 may .be driven i-n a direction opposite to that in which the polishing element lIIlpBlS the shaft 23, by reversing-the electric current which flows to the said mot0r.-

What is claimed is: 1. A'pol shing devlcecomprising, in combination with an'elevatedsupporfl of amoto'r drivenpolishing elemeht,,m-eans between the support and; said;polishingielement adapted to suspen lgthelatter while operable tolperunit the weight of theeleme nt to rest upon surface to herpolished said suspending ,means being adapted totwistupon reaction of the motorto the resistance resulting from 'ithe frictional contact of said element with "thesurfacetobe polished, whereby to tend to elevate said element into proper: polishing contactual pressure against said surface, and means associated .witlrthej suspendlng means for driving the polishing element in an .orbital direction.

v ,2. A polishing device comprising the combination with an elevated support, of amotor driven polish ng element, {L'flGXlblG twistable suspending.means between the support and the motor driven element, said fixible'element "being adapted to be twisted by the motor of-theelcment due to the resistance offered'by the surface tobe polished to the polishing element, whereby said element will be raised from the surface to be polished to a su'flicient degree to reduce the frictional contact betweenthe surface and said element and said element permitted to rotate, and

means associated with the suspending means for turningethe polishing element orbltally.

3. A polis'hing device comprising the combination withanelevated track,v of a motor driven polishing element, a flexible suspending means between the track andielement whereby said element is capableof movement to be positioned with reference to the surface to be polished, said flexible suspending means being adapted to be @twiste'd bythe motorof the motor driven element dueto the resistance offered by the surface 'to' be polished .to the polishing element, whereby saidv element, will be raised from said surface to a suflicient degree to reducethe frictional contact betweensaid surface and said element and said element permitted to rotate on said surface, and independently driven means connected with the suspending means for driving'the elementorbitally on the surface to be polished.

4. A polishing devicecomprising thecombinationwithan elevated support, offla polishing element including a driving motor,

and flexible means supporting the olishin element from the elevated support and jop'erable by;the reaction of the motorito the resistance to the rotation-of the polishing element offered byithe sur-faceito 'be polished whereby to lessen the pressuiebetw'een the polishing element and the surface tolbepolished, means associated with the jflezkible [means for moving the polishingelement 1011- V gitudinally of the surface to be polished, and means associatedwith theflexible means for driving the polishing element orbitallv 5. In a polishing device; a rotatable polishing elementnormally resting with itsfull weight on the surfacefto be polished, means for rotating said element, and flexible suspending means for said element arranged to'betwisted by said driving means when'the latter is initially set in'motion whereby to tendto elevate the element to a degree sufiicient to produce the proper polishing con- .tactual relation between the element and the surface to be polished, and means actuated by the rotatingmeans for movingthe polishi1 1g element orbit'ally on the surface.

In-testimony whereof I affix m signature.-

CHARLES S. CU .HMANL

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