US 1107512 A
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P. N. & P. E. GARDNER A. M. GARDNER, EXEOUTRIX OF I. N. GARDNER, DEOD.
GRINDING 0R POLISHING WHEEL. APPLICATION rum) MAR. 27, 1913.
1,107,512, i Patented Aug 18, 19M,
$0M Frcdaric/t Gard/76?? ficdcric EGd/ZW UNITED STAT s rm. nvr OFFICE.
rnribnmoir a; Gliainvntt AND 4 stances or ONE-THIRD rotourswanzoo THOMPSON,
x or sen ,ALrcE 1vr. eann vnit Exponent To (171 whom it may concern I I v 1 Be it known that we, FREDERICK N. GARD- ma: and Furniture-"E. GARDNER, citizens of the United States, residing at Beloit, in the county of Rock and State of \Visconsimhave invented certain new and useful Improve ments in Grinding or Polishing'lVheels, of which the following is a specification.
This invention relates to wheels which are used upon grinding or polishing machines, and theobject of the invention is to provide an improved means for tightly securing the grinding or polishing band upon the periphery of the wheel.
In the-accompanying drawings, Figure 1 is a side elevation of a wheel embodying the features of our invention. Fig. 2 is a section on line 2 2 of Fig. 1. Figs-3 is a frag mental detail View illustrating the loop of the band which is drawn down into the slot in the wheel, the joint in the band being formed in this portion.
The wheel comprises the usualhub 5, radial web 6 and peripheral flange 7. A slot 8 extends inwardly through the flange 7 and continues somewhat 'wider in the web 6. Preferably, a layer 9 of suitable material, such as canvas, is placed upon the periphery of the flange 7, the ends of said layer terminating at the edges of the slot 8. The grinding or polishing band 10 extends about the periphery of the layer 9. The band 10 is made of greater diameter than the wheel, and the excess of material in the band is drawn down through the slot 8 in the flange 7 to form a loop 11. This loop in the band includes the joint formed between the ends 10 of the strip of which the band is composed. Said ends are overlapped and suitably secured together, as by means of adhesive material, the abrasive material having been previously removed from said ends. These overlapping ends 10 provide a double thickness of material in the loop 11. In order to draw the band 10 tightly about the periphery of the wheel, means is provided to exert tension upon the loop 11 toward the center of the wheel.
A cross pin 12 lies in the lower end'of the loop 11, said pin preferably having flanges 13 at its ends to overlie the edges of the material of the loop. An eye-bolt 14 has an eye 15 therein through which the pin 12 extends The overlapping ends 10 of the I or BELOI'D, WISCONSIN; FRED RIC N. GARDNER, DECEASED.
GRINDING on Pomsnnvs i'wHEEL.
Specification'of Ljctters Patentv =Pate1'1tedAugt-18, 1 914.. Appliication fiied March 27, 1913. Seria1Noi757J28 a band at the bottom of the loop 11have a is lotv 16 therein to accommodate the endof the bolt 14. Said bolt extends downwardly through an opening in the top wall of a hollow boss 17 which is formed integral with the web 6 of the wheel at the lower end of the slot 8. A slot 18 in the Web 6 continues inwardly from the boss 17, and the bolt 14 projects through said boss and into the slot 18. The inner end of the bolt is screw threaded, and a nut 19 is turned on said threaded end, said nut having a plurality of recesses 20 in its periphery adapted to receive a suitable implement for turning the nut. A coiled compression spring 21 surrounds the inner portion of the bolt 14, one end of said spring bearing against the nut 19 and said spring extending into the hollow boss 17 and having its opposite end bearing against the end Wall of said boss. The spring 21 tends to draw the loop 11 inwardly and thus exerts continuous tension upon the band 10 to draw it tightly about the periphery of the wheel. The tension of the spring may be adjusted by turning the nut 19.
It has been found that variations in temperature and humidity will sometimes cause the abrading band to shrink or expand. As will be seen, in the construction herein disclosed this shrinkage or expansion of the band will be automatically taken care of by the spring 21, so that the band will be maintained tight upon the pulley under all conditions.
e claim as our invention:
1'. The combination of a grinding wheel having a slot extending inwardly from its periphery, a grinding band fitting upon said periphery and having a portion extending into said slot, a bolt operatively connected to said portions. and a coiled spring tending to draw said bolt inwardly to maintain said grinding band tight upon the wheel, said bolt being screw-threaded whereby adjustment may be made to vary the tension of said spring.
2. The combination of a grinding wheel having a slot extending inwardly from its periphery, a grinding band fitting upon said periphery and having a loop extending into said slot, a cross pin in said loop, a bolt engaging said cross pin and extending through a part on said wheel, a nut threaded on said neonate GAR-Dunner BELOIT, Wisconsin, 1113- bolt, and a coiled compression spring surrounding said bolt and positioned between said part and said nut.
3. The combination of a grindin Wheel having a slot extending inwardly rom its periphery, a hollow boss on the wheel at the inner end of said slot, said wheel having a slot extending inwardly from said boss, a band fitting upon the periphery of said wheel and having a loop extending into the first-mentioned slot, a cross pin lying in said loop, a bolt having an eye through which said cross pin extends, said bolt extending through said hollow boss and into the sec- FREDERICK N. GARDNER. FREDERI O E. GARDNER.
Wit-nesses H. U. ADAMS,