US1573961A - Buff wheel and spacing device therefor - Google Patents

Description

Feb. 23 '1926.

H. L. ZUCKER BUFF WHEEL AND SPACING DEVICE THEREFOR Filed Sept. 26, 1921 gamma Wot Patented Feb. 23, 1926.

UNITED STATES PATENT OFFICE HENRY L. ZUGKER, 0F MATAWAN, NEW JERSEY, ASSIGNOR TO A. P. MUNNING & C0,, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

BUFF WHEEL AND STAGING DEVICE THEREFOR.

Application filed September 26, 1921. Serial No. 503,465.

To all whom it may concern:

Be it known that I, HENRY L. ZUCKER, a citizen of the United States, residing at Matawan, in the county of Monmouth and State of New Jersey, have invented certain new and useful Bufi' Wheels and Spacing Devices Therefor, of which the following is a specification.

The invention comprises a spacing device adapted .to be interposed between buliing or polishing wheel sections, when a number of the latter are mounted upon a spindle to make up a wheel having a wide working face.

One object of the invention is to prevent undue heating of the sections in the use of a wheel of the above character, by providing adequate air circulation between the same.

Another object is to provide a spacing device which will hold adjacent sections firmly against relative angular displacement, or movement off-centre to an eccentric position.

Another object is to construct the spacing device in such manner that the compactness or stiffness of the working surface of the wheel may be regulated.

Still another object is to provide a spacing device which will be effective to relieve the strains resulting from the use of the wheel upon work tending to bend the sections out of their natural shape.

Further objects and advantages of the invention will be in part obvious and in part specifically pointed out in the description hereinafter contained, which, taken in connection with the accompanying drawings, discloses a preferred embodiment thereof; such embodiment, however, is to be considcred merely as illustrative of its principle. In the drawings:

Fig. 1 is a central section showing several buff wheel sections mounted upon a spindle, with spacing devices constructed in accordance with the invention; interposed between the sections.

Fig. 2 is a plan view of a spacing device shown detached.

Fig. 3 is a section on line 33 of Fig. 2.

In the use of bufling or polishing wheels made up from layers of woven cloth, flannel, hides, etc., it is usual to employ wheels of comparatively small thickness, and where a wheel with a wide cutting face is desired,

to mount a number of the thin wheels or wheel sections together upon a spindle, thus making a complete wheel of any desired thickness. However, when a number of wheel sections are assembled in the manner above described, the cooling effect of the surroundin air upon the wheel is decreased, particu arly as regards the interior sections, with the result that the wheel is liable to become overheated in use. Also the sections tend to slip angularly relative to each other when the work is pressed tightly against the wheel, and in some instances the strains tend to wear away the centre holes of individual sections, permitting the same to shift to an eccentric position which destroys the evenness of the wheel face.

According to the present invention, a spacing device is provided which may be interposed between the wheel sections to avoid one or more difliculties such as are above mentioned, but it will be obvious that all of the features of the invention need not be conjointly employed.

Referring to the drawings, I have shown in Fig. 1 a portion of a spindle 1, upon which are mounted a plurality of buff wheel sections 2, the sections being clamped in position by any suitable means, such as a nut 3 shown in Fig. 1 as working on the threaded end of spindle 1, and bearing against a collar 4, between which collar and some suitable abutment (such as the opposing collar 5 indicated by dotted lines in Fig. 1) the wheel sections 2 may be clamped as firmly as desired by tightening up the nut 3. The above-mentioned parts being more or less conventional will not be described in greater detail.

The spacing devices (indicated generally by numeral 6) are designed to be interposed between adjacent wheel sections in the manner indicated in Fig. 1, each spacing device being in the form of an annular member having a central hole 7 therein to enable the same to he slipped over the spindle 1. In order to hold the sections firmly against displacement, the spacing member 6 is provided with a raised portion 8 on one side adapted to engage the side of the butt wheel section adjacent thereto, and the remaining side of the spacing device is provided with a depressed ortion 9 substantially com lementary to t e raised portion. Thus w en several wheel sections and spacing devices are assembled "together and the wheel clamped up, the raised portion 8 of one spacing device tends to force the adjacent portion of a wheel section into the depressed portion 9 of the adjacent spacing device, and the wheel section is bowed more or less as indicated in Fig.1, depending upon the degree of lateral pressure applied through nut 3 in clamping up the sections. Thus each wheel section is locked in position, so to speak, and the bending action efi'ected by t e spacing devices opposes strongly any tendency of a section to rotate relative thereto. Furthermore, the wheel sections are held adequately against movement to an eccentric position due to distortion of their centre holes, since the bowing or bending of the material of the sections by the raised and depressed portions 8 and 9' presents eflective resistance to such movement.

The spacing device may further be re-' versely curved to provide raised and despectively opposite to those having the firstmentioned raised and depressed portions 8 and 9. As illustrated, the outer edge of the spacing device is curved to provide a raised portion 10 on the-side of the member 6 which contains the depressed portion 9, and a depressed port-ion 11 on the side of the member which is provided with raised portion 8. Thus the spacing devices will present a somewhat sinuous cross section tending to bend the buff wheel section reversely as indicated in Fig. 1 to hold it securely in proper position.

The raised portions 8 and 10 may be constructed to engage the bufl' wheel sections more tightly by providing gripping corners 12 and 13, which engage the material of the sections and hold them from shifting.

I prefer to construct the spacing devices of sheetmetal, which may be readily stamped or pressed out into curved cross section, thus forming the raised portions 8 and 10 and their complementary portions 9 and 11 respectively, in one operation. In the present instance the raised portions 8 and 10 are annular in form and concentric to centre hole 7. The gripping corners 12 and 13may be easily formed by cutting out pieces from the raised portion 8, and cutting notches in the circular edge of the spacing device as shown more particularly in Fig. 2.

I prefer to form the spacing device of metal which is resilient, for several reasons.

When buff wheels are made up of several sections as above described, it is sometimes desirable to have the working surface of the wheel compact and stiff, while inother instances a softer or more yielding working surface is desired. lVith resilient spacing devices of the above character, the spacing between the wheel sections can be varied to suit diii'erent conditions, since by increasingthe lateral pressure by screwing up the nut 3, the spacing devices are compressed, bringing the wheel sections closer together, and holding them so tightly that the working face of the wheel is less yielding; and on the other hand, if the lateral pressure on sections is decreased the wheel sections are spaced a greater-distance and individual-sections will yield or give more readily, resulting in a wheel of softer quality. Owing to its curved cross section, the spacing device may be readily compressed without injury, the notches 13 permitting the same to assume readily a flatter shape with the corners 13 biting into the material of the sections to hold them more securely.

The resiliency of the spacing devices is also of advantage in relieving strains on the wheel sections and spindle in 'use. For example, ifgthe wheelis being used to bufl or polish corners, the operator may press the work more or less laterally against the wheel, tending to bend individual sections into an oblique position, straining the shaft as well as the centre holes of the sections. The resiliency of the spacing devices is sufficient to take up and relieve these bending strains without releasing the sections, and the space ing devices form a cushion which brings the wheels sections back in the proper alinement as soon as the lateral pressure is released.

The spacing of the wheel sections permits circulation of air between the same, and, if desired, this cooling efiect may be increased by providing a recess 12 within the spindle 1 and opening into the space between sec tions, as by means of one or more holes 13 extending from the recess 12 to the outside of spindle 1. The spacing devices are then constructed to permit the outward flow of air along the interior sides of the sections, the air being drawn in through recess 12, and thrown outwardly between the sections by centrifugal efi'ect. With spacing devices of the form illustrated, the cross sectional shape leaves spaces between sections through which air may circulate, the recesses 12 permitting the air to pass from the central portion of the spacing device to the depressed portion 9,

while the notches 13 permit the air to flow and said spacing device having, means per-' mitting outward circulation of air between the sections from said recess.

2. Is combination a spindle, bufi' wheel sections carried thereby and a spacing device interposed between said sections, said spindle having a recess opening into the space between said sections to supply air thereto, and said spacing device having depressed portions on oppositesides thereof with apertures connecting said depressed portions to permit of outward circulation of air between the sections from said recess.

3. A spacing device for buft' wheel sections comprising an annular member having depressed portions on opposite sides thereof, and one or more apertures extending between said depressed portions.

4. In combination, a plurality of bufi' wheel sections, and resilient spacing devices interposed therebetween, said spacing devices each having complementary raised portions and depressions on opposite sides thereof whereby the raised portion of a given spacing device forces the adjacent butt wheel section into the corresponding depressed portion of an adjacent spacing device.

5. A spacing device for buff wheel sections comprising an annular member having a raised annular portion on one side adapted to engage a side of a buff wheel section, the corresponding portion of the remaining side of said member being provided with a depressed annular portion adapted to receive a side of a butt wheel section.

6. A spacing device for butt wheel sections comprising an annular resilient member having on both its sides raised portions adapted to engage the sides of a buff wheel section, and complementary depressed portions adapted to receive the sides of buflf wheel sections disposed on both sides of said member respectively opposite to the corresponding raised portions, said first-mentioned portions being provided with gripping corners adapted to oppose relative movement between the spacing device and bufi wheel sections.

7. A spacing device for buff wheel sec tions comprising an annular sheet metal member curved in cross section to provide a raised annular portion on one side adapted to engage the side of a butt wheel and a complementary depressed annular portion on the remaining side adapted to receive a side of a butt wheel.

i A spacing device for buff wheel sections comprising an annular sheet metal member curved in cross section to provide a raised portion on one side adapted to engage the side of a built wheel and a complementary depressed portion on the remaining side adapted to receive a side of a butt wheel, said raised portion having a part cut away to provide gripping corners adapted to oppose relative movement between the spacing "effective width to be varied by change in lateral pressure.

10. A spacing device for buff wheel sections comprising an annular sheet metal member curved in cross section to provide a raised annular portion on one side adapted to engage the side of a buff wheel and a complementary depressed annular portion on the remaining side adapted to receive a side of a butt wheel, another portion of said member being also reversely curved in cross section to provide raised and depressed portions on sides of the member respectively opposite to said first-mentioned raised and depressed portions.

11. A spacing device for bufi' wheel sections comprising an annular sheet metal member curved in cross section to provide an annular raised portion on one side adapted to engage a side of a buff wheel and-a complementary annular depressed portion on the other side adapted to receive a side of a butt wheel, said member being also reversely curved to provide annular raised and depressed portions concentric with said first-mentioned raised and depressed portions and on sides of the member respectively opposite thereto.

12. A spacing device for but? wheel sections comprising an annular sheet metal member curved in cross section to provide an annular raised portion on one side adapted to engage a side of a butt wheel and a complementary annular depressed portion on the other side adapted to receive a side of a butt wheel, said member being also re versely curved to provide annular raised and depressed portions concentric with said firstmentioned raised and depressed portions and on sides of the member respectively opposite thereto, said member being resilient to permit its effective width to be varied by change in lateral pressure.

13. A spacing device for bull wheel sections comprising an annular resilient sheet metal member curved in cross section to provide an annular raised portion on one side adapted to engage a side of a but? wheel and a complementary annular depressed portion on the other side adapted to receive a side of a butt wheel, said member being also reversely curved at its adjacent outer edge to provide annular raised and depressed portions concentric with said firstmentioned raised and depressed portions and on sides of the member respectively oppo-.

site thereto, tapering notches being provided in the outer edges of said member, and parts of said first-mentioned annular raised portion being cut away to provide apertures staggered with respect to said notches.

14. A spacing device for bufi' wheel sections comprising an annular member having portions on its opposite sides adapted to engage sides of bufi' whee-l sections, said member being shaped to be resilient to permit its effective width to be varied by change in lateral pressure.

tortable cross section to permit its efi'ectivelateral dimension to vary by lateral pressure whereby the clamping means may be adjusted to shift the wheel sections toward or away from each other.

In testimony that I claim the foregoing, I have hereunto set my hand this 8th day of September, 1921.

HENRY L. ZUCKER.

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