US1695647A - File, rasp, or like tool - Google Patents

Description

Dec.'l8, 1'928.

E.v FURLER TILE, RASP, OR LIKE TOOL Filed Nv. 4, 1926 Patented Dec. 18, 1928."

UNITED STATES EMIL FURLER, OF ZURICH, SWITZERLAND. Y

Finn,v RAsP, on LIKE .Toon

Application kledyNoivember 4, 1926, Sexia1 No. 146,217, andin Switzerland November 15, 1925.

The present invention'relates toles, rasps or like tools.

The files known up to now are made of` now usually cut and to harden it by a spe- 'cial hardening process whereupon the sov formed file may bev mounted on any suitable body,.for instance on to the rim of a rotary j disk, to a bar of wood or of metal and so on. The iron piece of which the file is made may invention ina section,

be fiat, or'eurved lengthwise or crosswise, it. maybe a tube of cireularor any other crosssection.

The invention further consists of details of construction, which together with the fea-Mv tures iirst mentioned, will be better understood by reference to the drawing.

In the drawing v Fig. l shows a rotary tool according to the vFig. 2 isla face view thereof, y

Fig. 3 shows as another tool acco'rdingrto this invention altubular ile in longitudinal section. l

The tool vaccording .to Figs. l and 2 come prises two circular disks 2, inounted 0.11 a shaft l and firmly held thereon by means of a nut 4f screw-'ed on to a screw threaded per` tion 8 ofthe shaft 1 which nut 4 presses the disks on to a collar of shaft l.. The rims of the two disks 2,v 3 are bevelled in opposite directions.

to fit the rims of the disks 2. 8. lBetween the ends of the openring 5 ashort piece 7 is arranged having the saine crosssection as the ring 5.

On the two disks rests a split ring 5, the inner wall of whichis bevelled TO the said piece 7 the'ends` of a flexible, hardened for instance easev hardenedi'ron band-filet) are fastened by. meansv of countersunk screws. l() in the usual manner. By tightening the v nut 4 the disks 2, 3 are brought nearer each.

other and they expand the ring 5 uniformly lwhich is in any position concentric to the shaft l. The band 9 is tightened by eX- panding the ringy andl runs concentric to the axis of rotation. The band 5 is eut while it is flat and is hardened by a special hard-y The file 9 is cut at eningr process. When hardened it isy bent,f

fixed to the piece 7 and then brought on to. `the disks 2, 3,

As shown in Fig. 3 :the toolmay'be made of'a thin walled tube 11 of soft iron. The v of the tube l1 a handle 13 is arranged.v The vtube maybe of circular, rectangular or po- Y lygonal 'crosssection.

'The tube may b e filled with metal such as tube by means of saidmetal.v ,y

What Ilwish to secure by U. S. Letters Patent isif f y 1 A tool of the class described `comprising a` lile' forming an open ring, an. open ring ony y'the periphery of which said file lis arranged, aI coupling piece between the' ends `offthe openl ring and to which the ends ofthe fileA .Y

csf

y lead and the handle may be `fastened to the i i beveled onits inner periphery so that move-v l nient of said discs toward each other causes said ring tobe diainetricallyk1 expanded, a

shaft onwhieh said dises are mounted 'and means coaeting with the shafts to move the discs toward land from each other. A e In witnesswhereof I `affix my' signature.

^ Y EMIL FURLVER.

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