US10631A - Machine fob making shovel-handles - Google Patents

Description

RUSSELL D. BARTLETT, OF BANGOR, `MAINE.

MACHINE FOR MAKING SHOVL-HANDLES.

Specication of Lettersk Patent No. 10,631, dated March .14, 1854.

To all whom t may con dem:

j Be it known that I, RUSSELL D. BARTLETT, of Bangor, in the county of Penobscot and State of Maine, have invented new and useful Improvements in Machinery for Manufacturing the Hand Part or Head of 1 Shovel-Handles; and I do hereby declare that the same are fully described andrepresented in the following specification and the accompanying drawings, letters, figures, and

references thereof. f

Of the said drawings, Figure l, denotes a' top view of the mechanism constituting my invention or machine for manufacturing the head or hand parts of a shovel handle. Fig,

2, is a front elevation of the same. Fig. 3,

i is a transverse section taken longitudinally through-the shovel handle when in the position for the correct operation of the first one of the two vertical and movable cutters. Fig. l denotes a top view, and Fig. 5, a side view of a shovel handle. TheD or head part (or that part A, which is united to the shank B) is made with a concave curve in a longitudinal direction from a, to b, and with a convex curve in a transverse direction or from c, to d. It is also vmade with an opening E for the reception of the hand Vof a person. That part whichisgrasped by the-hand is rounded 0E by my machine in two directions as seen at g, t, i, in Fig. 4

' and' b, e, f, in Fig. 5. The underside of the head A, is made a plane surface,fthe same being formed by holding or applying itkon a rest C, and against the face of a rotary disk D, that is provided with cutters E, E. vIn order tocorrectly form the upper curved surface of the head A, I make use of a dishedwheel F, a'vertical section of which is shown in Fig. 6, as taken in line of its axis. This dished wheel consists of a flat disk c, or its equivalent united to a projecting rim or anch, cZ, which is circular` in section taken in any plane which is perpen- 45 dicular to its shaftfe, while it is curved to a larger radius from where it joins the disk to its opposite edge, the curve "being shown at g, h, and g l1. in Figs. 2 and' 6. This dished wheel is provided with one or more 0 cutters z', each of which extends through a throat 7a, (made through the rim of `the wheel) and has its cutting edge `projecting inward from the inside surface ofthe rim.

y The cutter is shaped so as to form the curve a b, seen in Fig. 5. Each cutter is so applied to the wheel, and there may be such a number of them as circumstances may re- Qquire. In `tothe wheel, a rest lGr, projects from a standard H. This rest consists of a shelf Z, and a bearer plate m, raised on and vertically above the said shelf. A horizontal ,sectionof the wheel F, taken just above the shelf and showing the mode of applyingthe `shovel handle, is given in Fig. 7

In vthe process of forming the curved surf face of the head A, such head is passed into l the wheel, and with its plane surface resting against the bearer m, while the head is sup- The cutter wheel Y ported on the shelf l. being in motion in the direction as denoted by thearrow n, the shovel handle is gradually turned horizontally from the position seen at I, into that represented by dotted lines at K. In so doing it will be cut` down or curved in two directions, thatis both lone gitudinallyand transversely, as -hereinbefore described. The bearer of the krest is so placed with respect to the rim, that sustains the cutters, that its inner edge or end shall' .be at a distance from the rim equal to-or a vrlittle greater than the distance from b to f 'of F ig. 5, or in kother words, the greatest thickness of the head. This will enable the head to be turned or moved under the operation of the cutters so as to impart't'o it the required form on its curved surface.

.The wheel is rotated by a band made to op#V erate a pulley L, fixed ont-he shaft of the .wheel After theV handle has been Vthus treated, it isl placed on a bed, M,and between the jaws N, N, of a holder, O, that is fixed on the top of a vertical tubular shaft f y i' P, the position of the handle being shown at Q, in the drawings. Y v .VVithin' the shaft P, there isa vertical shaft R, that is supported onv and connected to a cross bar S, that extends between and. is jointed t-o two treadles T, T, one of which,"`

viz, T, is so applied as to enable a person to raise the shaft R, by the downward presi sure of his foot on the longer arm of said lever. The other lever is'so applied as to enable him to depress the shaft R, by press-` ing down the longer armof said'lever. `A

fork U, formed as seen inside view in Fig.

8, is attached to the upper part of the shaft R, and is moved with and by such shaft;

Its prongs n", a, incline toward one anothery I as they proceedupward, and they respectively pass through two corresponding ori`V fices 0, o', formed through the jaws N, N. These jaws turn horizontally on fulcra o r pins at p', p', extending up from a head g', fixed on the shaft P. When t-he shaft R, is raised upward, thejaws of theholder will be opened apart ready to receive a shovel handle. /Vhen the shaft R, is depressed, these jaws close upon and firmly hold or grasp the handle. j

Above the holder, and in front of it, are arranged two sets of cut-ters, as seen at V, WV. They are affixed `to a Y shaped frame X, that is made to siide freely up or down between guides Y, Y. Each set of cutters is composed of a gouge o, anda chisel p, the bevel of the cutting edges of each of which is formed on its inside surface. The gouge is of a semicircular or semielliptic shape in horizontal section, while the chisel is straight or slightly curved in such section of it. The. purpose of such is to cut out the opening E, of the head partof the handle. By employ ing two such cutting tools together the process of sharpening them` may be vmore easily effected than if they were connected in one piece. They are confined to the bar g, of the frame X, by a screw clamp r. Such frame X, has a friction-roller s, extended into the groove y, of a cam Z, the form of ,j

such cam when developed on a plane surface being given in Fig. 9. This cam issupported on and fastened to a gear A', which in its turn rests on the tops of two blocks C', M1, and is rotated by means of aiworm or endless screw D', that is fixed; on a driving shaft E2. One journal of this shaft works in a shifting lever F', whilethe other is so supported in a stationary box Gr', as to enable the shaft to be moved by the shifting lever in such way as to carry the screw D', either into or out of engagement with the gear A'.

Besides the cutters which form the hole E' one set of which is intended to remove nearly the whole of the wood necessary therefor, while the other set is for finishing the hole, or taking away the remainder necessary to be removed) there is another curved cutter H'afxed to the barg, of the frame X, the purpose of such cutter gouge H', being to remove the surplus wood from the end of the head A, so as to form the curve g L z', as seen in Fig. 4L, such curve being the arc of a circle, whose center is in the axis of the shaft R. There are other cutters as seen at I', K', the same being arranged so as to produce the curve b e f, (in Fig. 5) of the extreme end of the head A. For this purpose they are so placed in the circular path of horizontal movement of the shovel handle as to cut such handle away after the othercutters have performed their oilices. The first cutter (I') is a roughing cutter,

` while the second one (K') is a finisher.

In the operation of the machine, the shovel handle, held by thevholder, is made to rest stationary on the bed M, not only while the frame X, descends and forces the set` of cutj ters V, down through thehead of the handle,

,stationary during the depression and eleva-v but while the frame X, is being elevated so as to carry the said cutters out of and above the handle. This done, the holder is turned through the sector of a circle so as to carry the head of, the handle-.directly under the cutters WV, and H', and such holder is kept tion of such cutters, Whichnext takes place. ,'On the accomplishment ofthelatter opera- :tion the holder is moved through another sector of a circle suiiicient to carry the handle successively in contact with and by 1' operates. The arm L', carries a slidingbolt iN', which at its rear end rests against a ,spring O'.

On this spring bolt there is a cam P', which is formed of an inclined passage a', a shoulder and a cam projection c', shaped as seen in top view in Fig. l0, and 1n side view 1n Fig. 11, which 1s a side view j of the arm. When the holder is in a proper 5 position for the operation of the set of cutjters V, to t-ake place, the spring bolt N', is pressed int-o a notch or recess d', of the block M', such notch or recess serving to maintain L the-position of the holder during the descent and ascent of the set of cutters V.` As soon as such movements of the, cutters V have taken place, a stud e', that projects down from the gear wheel A', is carried against the part c', of the cam P', and so as to move j the spring bolt backward out of the recess ci'. Next the stud during its further movement bears against the shoulder and pushesthe 'spring bolt against a cam projection f', of

the block M'. This cam f', causes a further backward movement of the spring l bolts, sufIicient to enable the stud to enter the groove a', and bear against the side 71,', of it. Next the stud by its pressure against the part, 71,', moves the arm L', still further until the spring bolt passes into another recess g', in the block M' the stud in the' meantime `passing through the groove a', in Vconse-` quence of the forward motion of the spring bolt in passing from the'cam f', into the recess g'. This last recess g' receives the spring bolt and maintains the stationary position of thevholder during the time the cutters 1V, are depressed and elevated. As soon as their elevation has taken place, another stud h" (projecting down from the gear wheel A', see Fig. 12, which is an underside view of the gear wheel A', and its studs c" and z",) is carried into contact with the cam c', so as to move thespring bolt back out of the recess g', andiby its pressure against the shoulder b' move the arm L',

so as to carry the holder around not only far enough for it to cause the cutters I, K, to perform their offices, but against a cam d', formed on the inner side of thev block C', and so made as to force back the spring bolt far enough to permit the stud to pass through the groove a, and clear itself from the spring bolt. On the accomplishment of al] this the shovel handle is to be removed from the holder and another one put in its place and the holder turned around, so as to again bring the spring bolt into the recess d.

Having thus described my invention, I claiml. rIhe combination and arrangement of the bed M, the rotary holder O, one or more vertical movable cutters VNV, H, and one or more stationary cutters I, K', as made to operate together and form the D, or head part of the shovel handle substantially as speciiied.

2. And I claim the combination of the curved knife, o, andthe arc knife, p, so ap- 'I plied'together as not only to allow them to' i 3. AndI claim the combination applied l to the shaft of the rotary holder and gear wheel A, for th'e purpose of operating the holder as specified, the said combination consisting of the cam'V blocks, C, M,pthe armrL, the spring bolt` N', its cam P', and the two studs, e', and h", the whole being constructed and made to operate together substantially as specified. y

In' testimony whereof, I have hereto set my signature this sixteenth day vof August, A. D. 1853.

RUSSELL D. BARTLETT.

Witnesses:

R. I-I. EDDY, F. P. HALE, Jr.

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