US33466A - Improvement in lathes for turning broom-handles - Google Patents

Description

NrTnn STATES Trice.

PATENT PETER PRESOOTT, OF BOONEVILLE, NEIV YORK, ASSIGNOR TO HIMSEIJF AND G. Il. POST, OF SAME PLACE.

llVlPROVEMENT IN LATHES FOR TURNING BROOlVl-HANDLES.

Specification forming part of Letters Patent No. 33,1166, dated October S, 1861.

To @ZZ whom, t mayconccrm Be it known that I, PETER PREsco'r'r, of Booneville, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Machinery forTurning Broom-Handles; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in ,which- Figure l is a longitudinal section through the improved machine in the vertical plane indicated by red line 0c x in Fig. 2. Fig. 2 is a top view of the machine complete. Fig. 3 is a back view of the plate which carries the grooVing-cutter. Fig. 4 is a face or front view ofthe same. Fig. 5 is a front View of the cutter-head of Figs. l and 2.

Similar letters ot' reference indicate corresponding parts in the several figures.

To enable those skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A representsthe table for containing and supporting the machinery which I am about to describe.

B B B B are four rollers carrying the feed-wheels ce a a a', the former of which feed the work to the cutters, while the latter draw away the finished handles. Shafts B B and B B have pinion spur-wheels bb b b on their ends, the lower two of which wheels engage with a large spur-wheel O, as shown in Fig. l of the drawings, and as this wheel C is rotated in the direction indicated by arrows in Fig. l it gives rotary motion to the lower wheel Z), and this wheel b rotates the upperwheelb. The lower wheel b rotates the upper wheel b', and also the large wheel O. One of the lower shafts B carries on one end a large spur-wheel B2, which receives arotary motion from the short tool-shaft D, through the niediurn of bevel-pinion c, large bevel-wheel c', and Vpinion spur-wheel (l, and the four feedwheels a a a a are thus rotated in the direction indicated by the arrows in Fig. l, and they have a proper relative speed with that of the cutting device, as will be hereinafter fully explained. The upper feed-wheels a a should be allowed to have an upward yielding motion, so that they will accommodate .themselves to the varying thicknesses of poles which are passed between them.

The tool-shaft D is supported in bracket-- bearings D D', projecting out from and secured to one side of the table A, as shown in Fig. 2. On this shaft D are three belt-wheels e e e, the middle one of which is fixed to the shaft D, and the side wheels c e are loose on this shaft. Thus when the belts which drive the shaft D are thrown off on either one of the side pulleys e e the shaft D will not be turned.

D2 D are levers for shifting the belts which drive shaft D.

E is a strong beam, which extends longitudinally through the top of table A and which is in the middle of this table. On this beam or bed E the cutting ,apparatus is mounted. F F are two stationary bearing-blocks su pporting the hollow horizontal spindle G in their upper ends. This spindle G is arranged longitudinally between the two pairs of feedwheels a 'a ct a and in such a positionv with respect to these feed-rollers that the sticks passed between rollers ct a will be directed into the hollow spindle G and by this spindle directed between the rollers a a at its opposite end.

G is a belt-wheel which is keyed to the hol- Y low spindleG, and over thiswheel a belt passes, which communicates a rapid rotary motion to the spindle G from `the main driving-shaft kA. The bearing-blocks in which spindle G turns do not allow this spindle to haveany longitudinal or end play.

H is a flanged collar, which is put upon spindle G and allowed to have an end play only on this spindle. This collarllI has an annular groove f in its periphery, into which groove plays a pin g, which is on the short arm of a bifurcated lever I, which is pivoted at g to the table A. The long arm of this bifurcated lever I projects under the spindle G, and its end passes into a cam-groove h in the side of spur-wheel O, as shown in Fig. l of the drawings. The collar H will thus receive its end play on the spindle G from the cam-groove hin wheel O, through the medium of vibrating lever I. The flange H on sliding collar H has two holes through it, which receive pins@ t', that project from expanding cutter-blocks kk through slotted holes which are made through the circular plate G2. The plate G2 is secured on the end of the spindle G, (shown in Figs. l and 2,) and on the outside surface of this plate G2 the knife-carrying blocks 7a lc are pivoted, and as the collar H is moved back and forth on spindle G these knife-blocks 71: k are operated by the flange H on this collar H, so as to give the desired taper to t-he stick, which is passed through the hollow spindle G. This tapering is effected by the movement of the collar H toward the plate G2, which causes the knives to gradually approach toward the center of the spindle as the stick passes through this spindle and is rounded.

Fig. 5 shows the knife-blocks k 7a, which' are pivoted at. Z Z to the plate G2. The knives m m have beveled cutting-edges, which cnt away the wood and round the stick as it is fed between them by the rollers d d. The pins '1l i, which project from the back of the blocks through slotted holes through the plate G2 and through holes in flange H diverge from the axis of the spindle, as shown in Fig. l, so that when the collar H is moved toward the plate G2 tlieknife-carrying blocks 7c 7c are moved away from the aXis of the spindle, and when this collar H is moved from the plate G2 the knife-blocks are made to approach the axis of spindle G.

The cutter-head G3 (shown in Figs. 3 and 4 of the drawings) carries stationary knives 7c 7.; on its outside surface, the cutting-edges of, which knives are beveled outward, as described for the knives in Figs. l, 2, and 5. On the back surfaceof the circular head G3, invFigs. 3 and 4, a knife-block n is pivoted, carrying a knife p. A pin r projects from the block n, which passes through a hole in the flange of collar H, and by means ofa suitable cam, which is made to act upon the long arm of lever I, the knife p can be made to cut grooves in the broom-handle while the knives k la are rounding this handle.` This single cutter p is intended merely to groove thehandles at proper points, and for plain handles it will not be used.

The operation of the machine above described is as follows: Motion is comn1uni-v cated to the main shaft A', and from this shaft rotary motion is transmitted to the spindle G by a belt s, and also to the large spurred cam-wheel C and feed-roller shafts B B B B', through belts. pulleys, and spurwheels, as before described. The machine now being in motion, a stick of wood of the proper length is'placed on the guide-table N and pushed endwise between the rollers cta and up to the rotating cutters m m which round the stick as it is fed through the hollow spindle G. y At the commencement of the operation of rounding the stick orhandle the cutter-blocks k k are separated as far as they can be, and as the work progresses these cutters are made to gradually approach each other by the operation of collar H upon the pins t' i, actuated by the forked lever I, o ne end of which works in a cam-shaped groove hin the large wheel C, while the other end plays in the annular groove fin collar H, all as before described. Then as the cutters m m are rounding the stick they are at the same time gradually reducing or tapering it, and as the smallest end of the rounded stick leaves the cutters this stick is received between the grooved rollers a a, which conduct the finished handle ont of the spindle G. The cutter P on shaft D isused to roundthe small ends of the handles after they have passed through the spindle G.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The arrangement ofthe pins 2', perforated flange H', and sliding collar H with the slotted circular plate G2, pivoted knife-blocks 7c k, and pivoted cutter carrier n, as herein shown and described.

PETER PRESCOTT.

Witnesses:

REUBEN NIcHoLs, JOHN HAoKnTT.

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