US904805A - Polishing-head. - Google Patents

Description

William:

1?. PIERCE.

POLISHING HEAD.

APPLICATION FILED MAY23,190B.

Patented Nov. 24, 1908.

(Il /wanton [id/21 Pierce.

UTTE STATES PATENT FRANK PIERCE, OF RUTLAND, VERMONT, ASSIGNOR TO 'llllil LINUOLN IRON WORKS, OF RUTLAND, VERMONT, A CORPORATION OF VERMONT.

POLISHING-HEAD.

Specification of Letters Patent.

Patented Nov. 24, 1908.

Application filed May 23, 1908. Serial No. 434,589.

To all whom it may concern:

Be it known that I, FRANK PIERCE, a citizen of the United States, residing at Rutland county of Rutland and State of Vermont, have invented certain new and useful Improvements in Polishing-Heads, of which the following is a specification, reference behad therein to the accompanying drawing.

This invention relates to a polishing head, and particularly to a structure adapted for use upon stone and similar surfaces.

The invention has for an object to provide a novel and improved construction of head provided with projections adapted to enter a space within an abrasive block secured to said head.

Another object of the invention is to provide means for balancing the head when it becomes worn more upon one side than the other and comprises an adjustable plate mounted upon the block carrying plate.

A further object of the invention is to provide a clutch connection between the adjustable plate and head whereby these parts may be separated as desired or when connected will engage and drive the block plate drawing the same into tightly locked position.

Other and further objects and advantages of the invention will be hereinafter fully set forth and the novel features thereof defined by the appended claims.

In the drawing :Figure 1 is a top plan; Fig. 2 is a side elevation thereof; Fig. 3 is a bottom plan; Fig. l is a vertical section on the line 4 it, Fig. 1; Fig. 5 is a detail perspective of the head, and Fig. 6 is a similar view of the adjustable plate.

Like numerals refer to like parts in the several views of the drawing.

The numeral 10 designates the supporting plate for the abrading blocks which is provided upon its under face with a series of projections 11 disposed concentric to the center or axis of the plate, and preferably formed of angular outline, for instance. hexagonal. These projections are adapted to fit an interior opening in the abrading or grinding blocks 12, and these blocks may be formed of carborundum, alundum, emery or other suitable abrasive material and are cemented to the plate 10 by the use of cement of any preferred character. The plate 10 is here shown as circular in configuration,

but may be of any desired form or material. The central opening 13 in the blocks 12 has angularly disposed walls corresponding with those of the projections 11 and also preferably extcndcd for greater length so as to provide pockets l-t disposed adjacent the outer periphery of the plate 10 and adapted to hold liquid and allow a clearance space for the action. of the grinding blocks.

The upper face of the plate 10 is without projections and slidingly mounted thereon is the balancing plate 15 which is provided with a series of securing apertures 16 through which a holding bolt 17 extends and is of less diameter than the diameter of the aperture to permit a free adj ustment of the balancing plate. The belt 17 passes through the washer 1S and is threaded into the plate 10 so as to clamp the balancing plate in adjusted position. This balancing plate is also provided with a plurality of clutch jaws 19 upon its upper face each having inclined contact faces 20 adapted to cooperate with similar faces 21 carried by the lugs 22 disposed within the head 23 which is suitably recessed for that purpose so as to produce in ell'ect a bayonet joint connection. This head is also provided with the usual pivoting lugs 2i by which it is supported from the polishing machine.

From the foregoing description it will be seen that the abrading blocks are supported by the projections from the under face of the plate and are mounted thereon so as to firmly hold them in position concentric to the axis of the head and permit their use without danger or possibilit of a metallic part coming in contact with the surface to be polished and thus injuring the same. The angular form of this projection fitting into the abradii'lg blocks also resists any rotary movement of the blocks and holds them firmly against CllS]')l lCGn10llt in such position as to provide the usual channels leading radially from the axis of the head between adjacent blocks. While the balancing plate and detachable head have been herein shown and described in connection with abrading blocks they are adapted for application to any desired character of surfacing head or plate for either polishing. grinding, or but ing action upon the material treated and are not confined to any particular character of work. The balancing plate permits the head to be adjusted when it becomes more worn on one side than the other and eonsequenth out of balance the plates may be readily shifted and secured so that the relation of the head to the center of the surfacing plate may be varied. The connection with this head by means of the clutch jaws permits the ready removal and replacement of the surfacing plate so that different grades or characters of surfacing material may be applied and used without delay as found desirable 'n finishing to different degrees the stone or other material being treated. The inclined faces upon these aws ride upon each other and drive the lower plate also permitting the lifting of the same by raising the machine spindle as it forms a positive locked connection bet-ween these parts.

Having described my invention and set forth its merits, what I claim and desire to secure by Letters Patent is 1. A surfacing head comprising a plate havin a series of angular projections upon its under face disposed concentric of its axis, and abrading blocks having interior recesses with angular faces to engage and embrace the walls of said projections.

2. A surfacing head comprising a plate having a series of projections upon its under face disposed concentric of its axis, and abrading blocks having interior recesses adapted to lit the w lls of said projections and provide a pocket adjacent to some of the walls of the projections.

A surfacing head comprising a plate, a series of angular projections upon the under face thereof, and abrading blocks having interior recesses of different angular form from the projections but adapted to engage a plurality of the walls thereof.

4:. In a surfacing head, a plate having surfacing means upon the under face tl ereof, a balancing plate mounted upon the upper su face, an operating head connected to sa 1 balancing plate, and mea--s for adjusting the balancing plate upon the surfacing 5. In a surfacing head, a plate having surfacing means upon the under face thereof, a

balancing plate mounted upon the upper surface, a head connected to said balancing plate, and a screw extended through an enlarged aperture in the balancing plate and into said sin-facing plate.

head, a plate having surfacing means upon the under face thereof, a ba aucing plate mounted upon the upper sur- In a surfacing race, heat. connected to said balancing plate, a screw extended through an enlarged aperture in the balancing plate and into said sin-racing alate, clutch jaws provided upon the upper face of the balancing plate, and coengaging beneath the members carried by said e.

9. surfacing head, plate provided with surfacin means upon its under face, a ead for sup rting and rotating said plate, and means for adjusting said head laterally of said plate.

6. in a surfacing heao, a plate provided surfacing means upon its under face, a ..d for supporting and rotating said plate, 21562111. for adjusting said head laterally of said Jlate, and means for det-achably conn i said head and plate.

in testimony whereof I affix my signature in presence of two witnesses.

RANK PEERCE.

ll itnesses P. il ADAMS, ilowano Woonrm.

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