USRE5915E - Improvement in sandpapering-machineg - Google Patents

Description

UNITE-p STATES 'PATENT OFFICE.-

n-Ennnii'rgi.. Hreoon, or Ari'ioi., MAssAeHpUs'nrrs. s

IMPROVEMENT IN SAND'PAP lnnvc.-Macinnsej 'z` spwifiwno'n forming-part of Lasers Patent N0.142,c2cf,amd september 9,1813; reims-N0'. 5.915', med

.Innereien application nieu 'April i3, i874.

To all whom tmcy conccrni- Be it known that I, HERBERT L. HArGooD,

.' of Athol, iii the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Sandpapering- Machines, of which. the following, taken in" connectioii with the accompanying drawings,

- is a specification:

My invention relates to amachi ne for smoothing wood-work by means of a cylinder covered with sand-paper, arranged to run at a high' rate of speed, and particularly to the constructionof the cylinder, and is applicable especially to smoothing the edges of many parts of vvarious articles of furniture, and particularly;

such parts as are curved or irregular in forni,

they being applied to this machine just as they4 come from the jig-saw, the cylinder also being applicable to various other kindsot' work, such,

for instance, asbufting the soles of boots and shoes; and the first part of my' invention re- '.latesespecially to the envelope of abrading material; and it consists in the use of a tube.

or hollow cylinder' of sand-paper, kmade by bending a at sheet -of the saine into the form of a tube, anduniting its contiguous edges 'by'. means ofglue or other suitable adhesive inatcial, said tube to be mounted upon and se-l cured to` any suitable core or foundation, to be run-at a high rate of speed. The second p art of 'my invention relates to thcconstructioii of the core or foundationcylinder, to receive the tube of abrading material; and it consists in the use, in'conibination with an envelope of sand-paper in the form of aliollow cylinder,

of a rubber tube, placed within said tube, and so arranged, with 'relation to two annular cupshaped-lieads, of metal or other suitable mate lrial-one of" which is lixed upon the shaft, and the other adjustable-that, by the adjustnient ofthe distance between said heads, said rubber tube will be compressed longitudinally,

and thereby expanded laterally, and lmade to ill the tube of abradin g materialtightly, and thus eifeetually prevent it from slipping upon the rubber. j

lIn the drawings, Figure 1 is a front eleva,` tion of'a machine embodying my invention, with'a portion in section. Fig. 4Z'is a vertical .section on line a' :r on Fig. l. Fig. 3 is a transversesection o n'liney yen Fig. 1. Fig. 4 is a longitudinal sectionof the abradingfcyluder, drawn' to an enlarged scale; and Fig. 5 is i a transverse section ofthe same on line z z.

jA isa column, provided with an enlarged base-liaiige, B, and having secured to itstop the table C. D is a stand, bolted or otherwise secured to one side of the column A, and provided with the boxes a a, and having formed' 1n its lower end, or secured thereto, the hollow anda belt rotary motion may be imparted thereto. In the chamber E, and fitted to slide vertically therein, is the yoke or cross-head Gr, provided with the slot c, in which the crankpin d -works, and, by its rotation, imparts to said cross-head a 'reciprocating motion in a. vertical direction, and, as the lower eudof the l shaft F' is stepped upon said cross-head, it must partake ot' said reciprocating motion.

AThe crank-pin d is formed in or secured to the shaft H, which has its bearings in the sides of the chamber E, and is providedwitli the pulley c, by which rotary motion is imparted thereto. A cam may be used instead of the crank-pin d, if desired. collar, secured to the shaft F just above the upper bearing c, when 4the shaft is in its lowest position, for the purpose of protecting saidbearing from the sand'and grit thrown olf from the abrading-cylinder. J J are two collars, placed upon the shaft F a distance apart about equal to the desired length of the cylinder, for

carrying the sand-paper. Each of said collars J is provided with an annular groove formed `in one end, and said collars are put upon the shaft Fiwith said grooved ends toward cach other, and with said grooves ,fitting over the ends ofthe rubber tube L, surrounding the upper portion of said shaft and between said collars. The lower collar J rests upon the` shoulderfoii the shaft F, while the upper one is adjustable by means of the nutl N. O is a tube of sand-paper, of theproper diameter to lit the outside of the collar J, and formed by y bending a'sheet 0f sand-paper into the form of a cylinder and securing its edges together, as

shown. The rubber tube L is of such a dia'in- I is a circular disk or eter as to lit looselyinto the tube of 'sandpaper; but when'plneed in position between the two vollurs J J, by turning di'nvni'he lint Nit will bev compressed longitud'nmllr und ex# punded tra'alsversel'so 'as to completely fill the tube `of sand-papera-nd hold it firmly in position. A thin ring of metal, forming the outside Wall of the annular groove formed in thecollurs J, is interposed between -t-he rubber tube and the tube of sand-paper, toln'event n the sandfrom eutting the rubber. 'y

Wlmt I claim as new, and desire to secure by Letters Patent of the United States, is l; Inv ai sundlmpering or bufling' nmehine, the: tube or hollow cylinder 0 ofl sand-peper, constructed substantially us described.

2. In a sundpulpering orbuling machine,

the con'lblmtion ot'v a tube of sand-paper, or equivalent material, with a; core or fol'lndation therelbr made of rubberor other Suitable elastie material, arranged to be eompressedendwise, und thereby expanded transversely, substantially :is deseriberbor the purpose specilied.

3. The combination of the shaft F, the eollms J J, the nut N, the rubber tube L, and the tube of sand-paper, or equivalent material, ar-

ranged as described, for the purpose speeiled. Executed at Athel; thisv 2dy 1r. LH'APeooD.

dey of April, 1874.

\\'itnesses: TnoMAs ll. GooDsPEED, WILLIE li. Keime.

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