US257870A - Cavity-plane - Google Patents

Description

(No M'odel.)

, F. A. HUMPHREY.

GAVITY PLANE.

` No. 257,870. Patented May 16, 1882.V

E 1 l E THW d E F1a@ 7 e L X /znees Inventor l mz? l Fils.

"UNITED STATES l `PATENT Ormes.

FRANK A. HUMPHREY, (JF WORCESTER, MASSACHUSETTS.

CAVIT'Y- PLANE.

SPECIFICATION forming part of Letters Patent No. 257,870, dated May 16, 1882.

'Application led November 2B, 1881. (No model.)

Vfor Fattern-Makers, Wood-Workers, and Oth-f ers and I declare the following to be ay description of my said invention sufficiently full, clear, and exact to enable others skilled in the art to which it appertains to make and use the same,

reference being had to the accompanying drawings, which-form a part ot' this specification.

The object of my present invention is to pro vide a-praetical and efcient toolwhich can be conveniently employed. for dressing out small holes and cavities, and for smoothing narro'w surfaces located between or neariianges or angles; also,for working out small curves, and for general whittling and planing in positions in. accessible orjnconvenientfor working with the ordinary tools.

l To this end my invention consists in the improved tool illustrated and described, and in' the peculiar constructive features and combinations appertaining thereto, and hereinafter speciiically claimed.

lIn the drawings, Figure 1 is a top view ot' my cavity-plane with full handles Vin position. Fig. 2 is a bottom view of the same with one of the handles disconnected. Fig. 3 isa front view with both handles shortened or interchanged. Fig. 4 is a. longitudinal sectional view at line mx, Fig. 1. Fig. 5 is a transverse sectional view at line y y, Fig. 1. Fig. 6 is an end View. Fig. 7 shows detail of one of the chuck-pieces for locking the blade in position. Fi`g.8 shows a side view of the handle separate from the other parts. Fig. 9 is a side view of the convertible handle-tip, and Fig. 10 shows the form of the blade or cutter.

In the construction, A denotes the body or frame, having a rounded back bar, a, and a forward guard-flange, a', connecting the cylindrical ends or neck-bosses A2, in the manner illustrated.

B indicates the blade or cutter, formed as a straight rectangular plate, sharpened along one edge, b, and without holes or openings ot' any kind. "Said blade is seated and supported on the inner surface of the back bar, c, (which is properly tted for its reception,) with its sharpened edge bprotrud ing` through thethroatopening t at the rear of the guard-flange a', the blade being set at the proper angle and at suoli distance from the guard a.' as to give a` free cutting action when in use. The shavings pass up through the central opening, and are directed backward by the upper edge of the guard a', which is made to incline inward for that purpose. C U indicate chuck-pieces for retaining th `blade B in position. Said chuck-pieces fit into the recesses of the vframe ends, and are provided with bevels c at their rear edges, which are forced against the ends of the blade and clamp it securely in position.` The blade B can be 'held 'securely in position by either one or 'both of thechuck-pieces C.

D indicates the handles, which are fitted with screwthreaded connecting-studs D, for screwinginto the central openings ofthe frame ends A2, and against the chuck-pieces (l, for serving the double purpose of attachments for the handles and clamp-screws for the blade B. E indicates short handles or tip-pieces,'whch are employed as clamp-screws for retaining the blade when it is desired to, adapt the tool for use in a narrow space, as in Fig. 3. Said tips or elamp-screws are provided with ends E of the same size and pitch as the oonnectingstuds Dpof the handles, so as to be readily interchangeable therewith. In the presentinstance the clamp-screws are made to serve as tips for the `wood handles D, but,it' desired, could be independent parts, the handles being made complete without them. I prefer, however, to

construct them as convertible tips in prefer- 'l ence to independent set-screws, and I arrange them in combination with the handles as fol lows The tang or shank D2 of the screw-studs D is made to extendcompletely through the wood of the handle, (the ferrule D3 being formed integral therewith,) and a screw-thread formed on its outer end, d. VThe end of the wood handle is recessed, and the piece E, which is furnished with a central screw-threaded opening, screws onto said endcl of the tang and forms the finishing-tip of the handle when not required for use, as in Fig. 3. The tips E are provided with recesses or nicks c, and small ribs or projections f may be made on the ends IOO of the connecting-studs D', (see Figs. 4. and 8,) which t said nicks, so that the handle can be used as a screw-driver for starting or screwing up said tip-pieces on the-handle or frame ends. Lugstl may be formed under the ferrules D3, to prevent the wood handle from turning on the tang D2. The shape of the handles can be moditied to adapt the tool for convenient application or use on different classes of work.

The tool can be used with two handles, as in Fig. 1, or with a single handle, (either right or left,) as in Fig. 2, or with only the short body and clamp-screws E, (one or botl1,) as in Fig. 3, thus permitting of its convenient use in narrow spaces between anges and ribs. It can also be used for planing out small cavities and holes, and can be successfully used in any hole of sufficient size to admit of its entrance, (see dotted line, Fig. 6,) or from three-fourths ot' au inch diameter upward,.while it can be used for right or left hand whittling on straight or convex surfaces and in sniall'corners and angles. The blade can be quickly and convenientlyadjusted to cut thin or rank shavings, as required, and said blade'can be worn away to a very narrow strip before it requires renewal ot' the blade. The tool is ot' great utility and convenience'in pattern-making, cabinet-Work,

.and other branches of wood-working, wherein small cavities and various formed recesses require to be worked and smoothed out.

What I claim as of my invention, and desire to secure by Letters Patent, is

1. The body or frame formed with cylindrical ends or lieclebosses, connected by the externally-rounded back bar and inwardly-inclined guard-Hange, and the straight cuttingblade seated onsaid back bar, with its sharpened edge protruding through the throat-opening at the' rear ot' said guard-flange, the parts being combined and located in relation to each other and the exterior curvature substantially as shown and described.

2. The combination of the body or frame having the back bar and front guard, the straight blade supported on said back bar, and the chuck-pieces fitted into said fra-me and pressed against the ends of said blade .in direction of its length by a screw or clamping device aXially arranged within the ends ofthe frame, for retaining it in position, substantially as set forth.

3. The combination, substantially as hereinbefore described, ot' the frame having hollow screw-threaded ends A2,connected to each other by the backbar, a-,and guard-flange a,asshown. the straight cuttingblade B, seated on said back bar, the chuck-pieces C, ttted in recesses ot1 the frame ends and restingwith a beveled surt'ace againstthe ends ot' said blade, and the detachable handlesD, havingstudsorthreaded ends for screwing into said frame endsand against said chuck-pieces, for the purposes set forth.

L1. The combination, with the detachable handles D and blade supporting frame A, of' the convertible tip-pieces E, adapted for use as setscrews for the chuck-pieces when the handles are detached, or as end nuts on said handles,

substantially as hereinbefore described.

5. The combination, with the body or frame A, of the handles D, having the screw-threaded end studs,D, with projection f, ferrnle D3, and tang D2, screw-threaded at its outer end d, and the convertible tip-pieces E, with nicks e, as shown and described. v

Witness my hand this 1st day ot' June, A. D. 1881.

FRANK A. HUMPHREY. Witnesses:

. OHAs. H. BURLEIGH,

GEO. M. RIoE,2d.

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