US2518448A - Endless band abrading device - Google Patents

Description

` c. w. cAs'roN ENDLESS BAND ABRADING. DEVICE Filed Jan. 28, 1947 ATTORNEY Patented Aug. 15, 1950 1 Charles W.

Gaston, United States Army, San Antonio, Tex. `i

Application January 28,` 1947, serial Nb. 724,902

(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) The invention described herein, if patented, may be manufactured and used by or for the Government for governmental purposes without the -payment to me of any royalty thereon.

The present invention relates to an 'abrading apparatus, and while primarily intended for use in the production of artificial limbs, it may also be used in connection with the nishing or roughing in of many other articles.

A primary object of the invention resides in the formation of an abrading apparatus in which the abrading element is of a more or less permanent nature, in contradistinction to the usual strip of sandpaper generally employed in devices of this time.

Another object of the invention consists in the provision of an abrading apparatus wherein the abrading element may be readily sharpened from time to time, and wherein the teeth of an abrading element for relatively iine work may be enlarged so as to convert the abrader to a coarser or roughing-in type of work.

A still further object of the invention resides in the provision of an abrading or sanding device of the endless-belt type, in which cutting teeth are struck up from an endless band of nexible steel, and in Iwhich the opposed runs of the band are spaced apart a sufficient distance to permit of access therebetween to the end that cuttings passing through the openings formed by the teeth may be cleared away from time to time so as to maintain the cutting action ci the band at its highest efficiency.

Other objects and advantages of the invention will be apparent from the following description when taken in connection with the accompanying drawings in which Fig. 1 is a front elevational view illustrating a complete embodiment of the invention;

Fig. 2 is a vertical sectional view therethrough, taken on line 2--2 of Fig. 1;

Fig. 3 is a plan view of the apparatus; and

Fig. 4 is an enlarged fragmentary sectional view through a portion of the abrading element.

Referring to the drawings in greater detail, the numeral I refers to a table or the like upon which the operating mechanism is mounted. The table top is provided with a central opening and a hinbged cross-bar 2 which provide spaced parallel slots for the spaced runs or iiights of an abrading band. The bar 2 may, of course, be swung to vertical position when a band is to be installed or removed. Mounted on the upper surface of the table I at the opposite ends thereof are opposed brackets or standards 3 provided with bearings 4 at their upper ends for a shaft 5 to which is fixed a roller 6.

Depending from the under surface of the table l is a pair of brackets I carrying bearings 8 for a drive shaft 9 on which is fixed a roller Ill for supporting the lower portion of the endless cutting element and imparting motion thereto. Also supported on the under surface of the table I is an electric motor I I, the shaft of which is shown as directly connected to the drive shaft 9 of the roller I0.

The cutting or abrading element is in the form of an endless band I2 of flexible steel similar to that used in band saws, and is provided with series of outwardly directed teeth I3 arranged in staggered relation and integrally formed by being struck up from the material 0f the band. The abrasive band may be guided and maintained in its proper position relative to the rollers 6 and I0 by means of spaced rings I4 secured to the roller in any suitable manner such as setscrews I5.

The operation of the device will of course be readily understood, it being only necessary to close the circuit to the motor Il and adjust the rheostat, should one be employed, to obtain the desired linear speed of the abrading band I2. The artiiicial limb, or other piece of work being operated upon, will of course be manipulated Iwith respect to the traveling band to provide the desired cutting or abrading action on various parts of the work.

The apparatus disclosed herein is highly eilicient and very effective for the uses to which it is particularly adapted, for instance, the device includes an endless abrading element of a permanent nature in that it is made of exible steel as distinguished from the ordinary endless bands of sandpaper; the teeth on various bands may be formed of diierent sizes so that the band of smaller teeth may be employed for finishing operations, while the band of larger teeth may be used for roughing-in work. There is less danger of damaging the Iwork in roughing-n operations with the band of the present invention than would be the case with a band saw or the like such as are now commonly used for roughing-in" purposes; the band of the present invention may be readily sharpened at any time by merely holding a nat-faced stone against the teeth while the band is running. And nally, a band provided with small teeth for ne work may be readily converted to one for wearing or roughing-in by merely repunching the band to provide larger teeth.

A preferred embodiment of the invention has A 2,518,449 3 been shtvii and described herein in detail, but it REFERENCES CITED is to be understood that the present disclosure is intended as illustrative of the invention rather mglef i312? vygrfferences are Of record m the than in a limiting sense, and that various minor changes in details of construction are intended 5 UNITED STATES PATENTS to be included-within the scopemofrthea. appended liuii'limrrr Nameh Date Claim. 10,2465' Branson A Nove- 15, 1853v I claim: 414,747 Arzt Nov. 12, 1889 An abrading device including a table providednl 782,245 Herrmann Feb. 14, 1905 with a central opening, a bar hingedjdone.,edgelo, 1,789,298, Bertrand Jan. 20, 1931 of the opening and yproviding an pair of parakl 2323,7'37HY Tavano July 8, 1947 slots, rollers mounted above anfL1913105111:,the:tax1er;A Y

a flexible endless band mounted on the rollersfandi. FREIGN PATENTS passing through said slots, Iandabrading teeth. Number:f Country Date formed in the material of the-band 15' 1325970 i Switzerland S8131?l 2, 1929

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