US1451102A - Nonvibratory tool guide - Google Patents

Description

Apr. l0, 1923.

1,451,102 C. C. NEALE NoNvIBRAToRY 'PoolJ GUIDE:

Filed Apr. 1'7, 1922 CHARLES C. N'EALE, OF TOLEDO, OHIO, ASSIGNOR OF ONE-,HALFSVTO PHILIP T. ULMER,

l.or sT. BAUL,

y MINNESOTA.

. Y NQNVIBRATORY Toor. emiliani.l

l, Applicaties iheii april V17,

To all'fwhom zt may'covwem': f Y Be it known that I, CHARLES C. NEALE, a' citizen of the United States, residing at Toledo, in the county of Lucas and State oi. y Ohio, have invented certain new and ,use-f?, ful Improvements in NonvibratoryTooI Guides; and I do hereby; declarebthe followv ing to be a full, clear, and exact description of the invention such as will enable others skilled in the art to which it appertains to make and use the same. f -My'invention provides a simple and eficient nonvibratory guide .for chisels and other tools that are operated with a'vibratory movement by power mechanism such as a pneumatic or an electric hammer or .vlbrator, and, generally stated, the invention consists of the novel devices and combinations of. devices hereinafter described and 2o defined in the claims.

Chisels and other tools operated by pneumatic. hammers or vibrators or the like .are in very vgeneral use by stone cutters and` engravers. In the use of these tools, it is the common practice to hold thel chisel, for example, in one hand and the pneumatic, hammer v or ,vibratori in 'the' other hand. Under this operation, the hand-held chisel or tool proper is subjected to constant rapid vibrations,"which, as is well known, in the course of a year or two of continued work of this kind, cause a peculiar and *very serious form of paralysis. j

The present device, which is herein de l` signedv as a nonvibratoryltool.v guide, has been put in actual practice, and "found to. accomplish the desiredend;v Itjcomprises a hand-piece or holder Aadaptedfto be gripped in the hand and which, While i't--w'ill guide the chisel or tool to its work. Vwill .be free or substantially free from the :vibrations produced in the chisel or tool. itself. lThis hand piece is preferably in the formiof a sleeve, through which the chisel-'orf tool is. free to vibrate axially, and, preferably, light coiled springs are interposed between the sleeve and tool to holdl the tool yieldingly in proper relative positions. Y

In the accompanying drawings, which illustrate the-invention, like. characters indicate like' parts v throughout the several views. 1 n

Referring to the drawings: y

Fig. 1 is 'an elevation showing the improved nonvibratory tool guide applied in but with the sleeve-like guide or hand-piece 1922. serial Nja. 554.3230.v

Fig.' 2 -is anelevation of the chisel andtoolv guide. removed, thesame being shown@ on a larger scale than in Fig. V1;

l Fig. 3 is a vlew corresponding to Fig. 2,

in section; and

F.' gs. land 5 are transverse sections taken on the line 4-4 and 5-5, respectively, of

M 'lhepneumatic. vhammer is indicated as an entlrety by the numeral 6 The tool which,

as illustrated, is a chisel, is indicated bythe numeral 7 and the same is provided with a stem8 at. the intermediate portion of which is an abutment 9 in the form offa collar, removably secured thereto by a p-in 10. The stem 8 lbetween the chisel 7 and the abutment 9 is of polygonal formation and the stem on the other side -of lsaid abutment is v round in cross-section audits end portion is reduced to afford a shank 11 insertable intopneumatic hamthe vib-ratory socketof the mer 6 in the customary way.

Surrounding the stem 8 is a sleeve-like guide or 'hand-piece that is transversely divided and the sections 12 and 13 thereof detachably connected by screw 4threads 14.

The outer ends of the sections 12 and 13 of the hand-piece are closed and provided with apertures 15 and 16, respectively, in which said stem 8 is loosely and slidably mounted.

working therein, and the polygonal portion of said stem and the polygonal aperture 15 in which it works connects the tool and hand-piece for common rotation, as best shown in Fig. 4. The hand-piece section 13 -is provided with a cavity 18 which joins the Vapertures 15 and 16 and which cavity is of such diameter as to permit free axial movement of the abutment 9 therein.

'Light coiled springs 17 encircling the stem 8 are arranged to be compressed between the abutment 9 and the sections 12 and 13 of the hand-piece at the ends' of th cavity 18.

When the tool is being vibrated by the pneumatic hammer or the like. while it is held and guided by a hand4 gripping the sleeve-like hand-piece. it is evident that the movements of the chisel or tool will not be interfered with and that they will not be imparted to the hand of the operator nor to t-he sleeve7 but, nevertheless, said sleeve affords means for guiding and directing the chisel o-r tool to its Work. The springs yieldingly hold the sleeve or hand-piece approximately in a central or intermediate position, so that at no time can it be subjected to the pounding action imparted -to the tool or chisel. Hence, no damage to the operator can be produced when this device is used because the hand-piece is of such weight that its inertia will not be overcome by the rapidly alternating vibrations of the tool and, hence, will remain substantially at rest or free from vibrations.v

What I claim is f 1.- A vibratory tool having a sleeve-lik hand-piece Wit-h closed ends, said hand-piece being transversely divided and the sections thereof detachably connected, said tool being sli'dably mounted in apertures in the ends of said hand-piece and held for common rotation therewith, and opposing springs in the hand-piece arranged to be compressed between an abutment on the tool and the closed ends of said vhand-piece.

2. A vibratory tool having a sleeve-like hand-piece rWith closed ends, said hand-piece being transversely divided and the sections thereof detaohably connected by screw threads, said tool having a stem provided with an intermedia-te abutment, said stem being sldably mounted in apertures in the closed endsof the4 hand-piece and having polygonal engagement with the hand-piece at one of said apertures to connect the tool and hand-piece for common rotation, and opposing springs arranged to be compressed between sai'd abutment and the closed ends of the hand-piece.

3. A vibratory tool having a hand-piece yieldingly connected thereto for vibratory movements of the tool in reverse direction in respect to said hand-p1ece, yielding means tending to hold said hand-piecein an intermediate position on said tool, said tool and hand-piece being of metal, the mass of said handpiece being much greater than that of said tool whereby said hand-piece will remain substantially at rest and substantially free from vibrations when said tool is rapidly vibrated.

ln testimony whereof I affix my signature.

CHARLES C. NEALE.

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