US60206A - Elisha w - Google Patents

Description

uitrit! tutes @sind gliding...

Iursovrmnur 1N 'conn-B0X., PLANES.

- t sPEcIFIoATroN-'g TO ALL WHOM IT MAY CONCERN:

Be it known that I, ELIsHA W. LnwrsLof the city of Philadelphia, and State ofPennsylvaniahave inventcdiv a new and improved Core-Box Plane for pattern-makers use; and I do hereby declare the following to bea full and exact description of the construction and` operation of the same, reference being had to the annexed draw.-` ings, and tothe figures and letters of lreference marked thereon. i

My inventlon consists of an improved instrument for planing out the semi-cylindrical concavities inwolideriw` core-hoi;es,` whichV are generally composed of twohalves, and serve as moulds for preparing cylindrical` sand;`

cores of an infinite variety of shapes; ,these cores being afterwards used; in connection with sand?` moulds, when any kind of hollow cylindrical castings are to he'produced. The improved planing instrument` possesses many` important advantages over. the kind` of planes heretofore in common.v use for this class of pattern work; itis verf-accurate andexpeditious in its operation, and-`capable of the nicest adjustment for any required diameter of cylinders within the extreme limits of its capacity.` 'Certain peculiar kinds of cylindricah core-box worin., which cannot "be" accomplished with the common roundfaced plane,'and` had to` be heretofore workedrout by hand, `are easily performeddwith this instrument, ashereinafter fully described. i

In order thatmy said invention may be clearly understood, I will now proceed t describe more` particularly 1 the construction and operation of the same.

On reference to the drawing, making part of this specification, and in which `similar letters ofi reference allude to like parts throughout the several views- Figurel is a sectional elevation of the improved plane. Figure 2 isa plan, Figure 3, an end view; and Figure 4a transverse section through the line xy, iig. 2.

The casting A forms the stock of the plane, and` is made as light as is consistent with required stability of its parts; ait has at its rear end a wooden handle, Kthe base of which is ttedf :into` a` recess in` the stock, and" further secured to the latter by the screws, a a# The stock A is, near the middle, providedlwith a vertical sleeve,` i B, which rests upon an arched support, C, and serves to carry a vertically adjustable ,s`l1apedpieceD; the soldV p upright stem of D is fitted into the sleeve, B, Vand its horizontal cylindrical part carries; the rotative tool-luthier,` E, the ax-is of which coincides with the `line of motion of the plane, and is,` ordinarily `so adjustedlvby means of` 1 the set-screw; g, as to intersect the linie of ,n the bottom bearing surface of the s'tck,lA, but it may be set either above or below this level for peculiar kinds of work requiring such adjustment. l F is` the` cutting tool, the shank of which is inserted into a transverselyjbored hole in the enlarged head offtheholder, E, in whicli. it s laterally adjustable for work of variousudiameters, and secured in any required position `hy means; of a set`-sc`rew,` c. i In.

the stockA-is provided a large opening, G, (g.,2,) wide' enough to allow the largest cutting toolto rotate,within` the same', when set out for thefull capacity of the instrument, and which also .serves tonliberate the chips. p A. l rotative feed movement is imparted'to the cutting tool in the following manner. Upon; the rear end 0E tli'etool;` f holder E'ris a small worm-wheel, H, 'into 'which gearsa-worm, I. This wormiis fitted uponfa roundpilu, which )las its bearings in two lugs, h h, cast'on` the hack end of sleeve D, and is provided withfa milled lieadie, the:l flatter being so Vplaced in relation to the handle, K, that it can be readily actuatedyhy therextendedfore-inger oi ,i the right-hand while `workingthe plane, without releasing its hold'on 'the handle, KL Thel plane providhdiil :with an adjustable gauge, J, secured to the left-hand bottom side of the stock, Aphyrneansof` thumb-scream@ p i jf, pas-sing through slotted openings in the stock; this gauge being made to bear againstthe sideof; thegpiecew of woodbeing planed, serves-as asuilcientmguideto keep the plane inthe correct lineof` motioupuringgte ,1

tmust "e r entire operation, and, when once setyinsures theproper'lhlating of the two halvesofl the` `corellloir evident to any one practised in pattern-making, thatthis instrument will produce` work etffftlie greateseaccuracyg, i which by means` of the heretofore employedplanes, with rounded face, could only bedbne with` great care am?. `consumption of time; but it will,further be easilynnderstood that it is applicable to suehkinds oiilwork` which cannot be done with the rounded plane at all, viz, the dressing out of short lengths `of uariousdametensa and wittli-` i sharp offsets in one piece of wood. In the` common rounded plane, the face of thestoek hearsupoxithelsamel surface of the wood, which is `being operated upon by the cutting tool, and `that partei?` the stockwhichislini advance of the cutting edge precludes all possibility-of working into sharpcornersfor f improved plane the edge of the tool is capable of cutting out sharply offsetted variations in the diameter of the box, which heretofore could only be dressed out in-a. tedious manner by means of gouges or chisels. Although this improved instrument is mainly designed for the planing out of cylindrical lcore-boxes,-it is evident that its use may be extended with equal advantage to many kinds of pattern or other Wood-work, as, for instance, the 'luting of column patterns, and in other similar cases. l

Having thus described the construction and operation of my improved plane, I desire to be understood that its arrangement in detail may be modified in various ways without impairing my invention, among which modifications I name the following: the lateral adjustment of the cutting tool may be effected by a set-screw placed in line with the shank of thecutter, and so arranged that the turning of thescrew will move the tool in thedirection for increasing or decreasing the radius of the cutting point." The bearings of the Worm-shaft, d, may be so arranged that the worm can be lifted out of the teeth of the worm-Wheel, for setting the cutter back to the proper position for commencing a next out, without turning it back by means of the worm, I, or the Worm-shaft Z may be provided with a ratchet feed motion, operated in various ways, for producing a regular feed for thc cutting tool, which intermittent motion can be readily given by means of the handle, K, if the same were hinged to -the stock and had a limited rocking motion, which would naturally `be imparted by the hand at every reversion of the motion of the plane, and which movement may by means'oilasuitable connecting link and ratchet pawl give the feed motion to the Worm spindle. Itherefore do not wish to limit myself to the precise arrangement of detail as shown in the annexed drawing.

But what I claimras my invention, and desire to secure by Letters Patent, is-

In combination with the stock A, the rotative tool-holder E, carrying a transversely adjustable cutter F, to which Ya circular feed motion is given by means of the Worm I and worm-wheel H, or in any othcn equivalent manner.' s

ELISHA Wt LEWIS. Witnesses:

JOHN GOEHRING,

CHAs. E. PANcoAs'r,

- TnEODoRE BERGNER.

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