US683123A - Polishing-wheel. - Google Patents

Description

Nb. 683,|23. Patented Sept. 24', mm. c. A. KNILL. POLISHING WHEEL.

(Apph ton flledspt 8 1900) (No Model.)

CHARLES A. KNILL, OF BELOIT, WISCONSIN.

POLISHING-WHEEL.

SPECIFICATION forming part of Letters Patent No. 683,123, dated September 24 1901.

Application filed September 6, 1900. $erial No. 29,124. (No model.)

To (0Z5 whom it may concern.-

Be it known that I, CHARLES A. KNILL, a citizen of the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Polishing-Wheels, of which the following is a specification.

This invention relates particularly to polishing-wheels having a pneumatic-cushioned peripheral polishing-surface, and has for its object improvements in the manner of providing the pneumatic cushion, of securing the same upon the periphery of the wheel, and to features of construction more fully set forth hereinafter.

In the accompanying drawings, Figure 1 is a side View of a polishing-wheel embodying the features of my invention, portions of the periphery of said wheel being broken away to show its structure. Fig. 2 is a side elevation of the metallic body portion of this polishing-wheel, showing the helical groove in its face for the reception of the pneumatic tube. Fig. 3 shows the body portion represented in the preceding figure, with the pneu matic tube lying in the helical groove formed upon the peripheral face of said body portion. Fig. 4 is a transverse diametric section through the periphery of this polishing-wheel. Fig. 5 is a face view of the emery band intended to encompass the wheel. Fig. 6 is a fragmental view of the pneumatic tube, showing the tapes in the interior thereof.

Like letters of reference indicate corresponding parts throughout the several views.

In the construction of this polishing-wheel I provide the body portion A, formed in this instance of cast-iron, having the hub A, the web A and the rim A. In the peripheral face of the rim I turn the semicircular helical groove A at its ends communicating with the inner side of the rim by means of the openings A and A extending through they rim at opposite edges thereof. Each edge of the rim A is provided with the annular ring A, secured to said rim by screws A A pneumatic tube 13, in this instance composed of rubber, lies in the helical groove A", each end of said tube being provided with an airvalve B, of the usual construction, extending through the openings A and A. To prevent the undue stretching and the creep ing of said tube in its helical groove and to secure the tube in its position upon the face of the wheel A, I insert the tape B in said tube throughout the length of the latter and secure the ends of the tape to the air-valves B. An endless cover 0, of canvas or other suitable material, surrounds the wheel, covering and protecting the air-tube B. The edges of the cover are provided with openings O for the passage of the screws A by means of which latter passing through the ring A the canvas cover 0 is secured in its place upon the wheel. The polishing-band D, an endless ring of fabric treated with an abrasive material, is adapted'to be slipped over the canvas cover 0 and is held in position upon said cover by the inflation of the tube B. When the tube is deflated, the polishing-band may he slipped off and on with case. When itis inflated, the bandis retained firmly in its place at the periphery of the wheel. Access to the tube is had by removing the ring A' and slipping the canvas cover C from over the tube. In use the cover is put in place and secured in position by the ring A and the screws A the polishing-band D put in place around the cover 0, and the tube B inflated by means of an air-pump. When it is desirable to remove the polishingband, the tubeB is deflated. It is evident that a wire or cordmight be used for the samepurpose as the tape within the tube B or said tube secured to the face of the wheel by cement or other means'without departing from the spirit of my invention.

I claim as my invention- 1. In a polishing-wheel, in combination, a body portion; an air-tube on the periphery thereof 5 and a tape of a constant length, fixed at its ends with relation to said body portion, and adapted to engage said tube and hold the same firmly against the periphery of said body portion.

2. In a polishing-wheel, in combination, a body portion; an air-tube helically arranged on the face thereof; a tape fixed at its ends with relation to said body portion, which tape extends through said air-tube and is of a con stant length just sufficient to encircle the body portion thereof and thereby hold said Ice tube firmly against the periphery thereof; and a polishing-band adapted to lie upon said air-tube.

3. In a polishing-wheel, in combination, a body portion comprising a rim having a he1i cal groove in the peripheral face thereof, and an opening through said rim near each end of said groove; an air-tube in said groove; a tape fixed at its ends with relation to said I body portion, Which tape extends through said air-tube and is of a length just sufficient l to encircle the body portion and thereby hold said tube firmly against the periphery thereof; an air-valve for each end of said air-tube, which valves extend through said openings in said rim; a cover for said air-tube; and an endless polishing-band.

CHARLES A. KNILL.

\Vitnesses:

E. F. HANSEN, A. F. SPAULDING.

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