US81761A - F-bank douglas - Google Patents

Description

FRANK-DOUGLAS, or NoRwIoH, CONNECTICUT.

Letters Patent No. 81,761, dated September 1, 1866.

IMPROVEMENT IN MACHINE EUR TURNING RODS.

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fro ALL WHoM 1r MAY coNcEnN:

Be it known that I, FRANK DOUGLAS, of Norwich, in the county of ANew London, and State of Connecticut, have invented a new and improved Self-Feeding Rod-Machine; and I do hereby declare that the following is a full, clear,` and'eXact description of the-same, reference being had to the accompanying drawings, making a part of this specication, in which-' Figure 1 is a side elevation.

vFigure 2, an end view of the cutter-head.

Figure 3, a longitudinal vertical s ection of the cutter-head. t

Figure 4, an elevation of the vend opposite to the-cutter-head,` showing a side elevation of the auxiliary guiderolls. l

Figure 5, a detached view of the guide-plate. v

In.this invention, the knives which reduce the stick to a round rod are so arranged that one of them scores directly into the stick, and at the same time draws it along and feeds it to the cutter, while the others shave o the corners of the `rod and round it to the proper size. A new guide-plate is also employed', together with a new device for holding the rods when they shall .have passed through the guide-plate.

i In the drawings, A indicates' the supporting-frame, and B B the bearings of the cutter-spindle, C represeating the belt-pulley, and D the cutterrhead.

The cutter-head and spindle are provided with an axial opening or bore, extending entirely through them, through which the stick travels Vwhile being reduced to the proper shape. v

The cutter-head is provided with three knives, one, e, arranged so as to present its edge nearly crosswise of. the stick, hut inclined slightly, so that as the cutter-head revolves, this knife will score directly into the body A of the wood, and at the same ti'medraw the stick along, cutting a spiral around it. This .blade cuts into the wood nearly'to Vthe depth of the shaving which is afterwards to be taken off, or, in other words, nearly to the lines which will form the circumference of the round rod when it is made. f

Immediately vbehind this knife is another, e', thev edge of which extends longitudinally with the cutterheadand the stiek,land which cuts cr roughs otl the chips that have been scored by the blade e, reducing the stick nearly to the required form.

Immediately behind" this knife is another, ve, the edge of which extends in th'e same directionas that' of.

blade e. This knife inishes oif the stick, reducing it to therrequired dimensions andfform, and giving it a smooth', even surface.

In order that the stick may at all points tit nicely, and thus be held firmly in the tubular cutterfhead, the bore of the latter corresponds to the size of the stick at the diiierent points, being largest at the outer extren1- ity, .decreasing a little at tlie'rear edge of the knife e', and decreasing still further at the roar edge of knife e, from which point it continues ofvuniform calibre to the other end of the spindle.

i For convenience in'v making the cutter-head, and to savel the necessity of elongating'it to too great an extent, I arrange the knives e e on opposite sides of it, whereby any point in the surface ofthe stick will pass under the operation of the latter knife the moment it has escaped from the former. Y

rIhe edges of the knives may be bevellod, and inclined to any degree, to make them cut more easily and cleanly without tearing or breaking away the wood. i f

The back of knife e presses against the side of knife e, and holds the latter in place, rendering only one screw necessary to holdboth blades. The edge of knife e is slightly curved, that part of it which 'rst comes inr contact with the stick being'bent up, so as to cut the chip cleanly from the stick.

In connection with a cutter and'knives thus constructed and operating, I employ acircular guide-plate, F, hung on a spindle at itscentre, and provided with a series of square holes, m m m, of different sizes, to receive -a variety of sticks, and arranged so that as the plate is rotated on itsspindle, the centres of the holes will be `successively presented in a line with the axis of the cutter-head and spindle. The plate is also provided with a series ofnotches, n n mand a spring-lucido, operating in the notches, by which it is held in the proper posisigel 2 tion -for feeding the sticks accurately through the dilierent holes. 'ihis plate not only guides the sticks properly to the cutter-head, and holds them steadily, but it prevents their turning while the knives are inl operation.

When the stick shall have passed entirely through the plate F, it is still necessary to have some provision made to prevent it from turning. By this time, however, the oppositcend of the stick will project through the other end of the cutter-spindle, and I take advantage ot` this fact to construct an apparatusfat that point for 4 the purpose.

Such apparatus consists of two grooved rollers, 1l. R', working upon shafts, S S', one of which is supported upon adjustable spring-bearings, b b, in upright' standards, T T. The rollersr are held in position with regard to each other by means of flanges, r 7', on one, which overlap the ends ofthe other, and preventit from sliding or moving endwise independently of its companion. The grooves on the rollers are so constructed and arranged that they form, in connection with each other, circular `openings between the rollers, through which the rods pass. '.lhe spring-bearings press the rollers together against the rod suieiently to hold the latter in place, guide it properly from the spindle, and. prevent its turning. f v

Cutter-heads and spindles of diiferent sizes, and provided with central apertures of different sizes, may be used in connection with the series of different-sized holes in thc plate F, and between' the'rollers R R', so that a perfect rod of any dimensions may be made,

It is evident that knives for moulding and turning the rod might be used with my improved feed-device, as well as knives for simply rounding and polishing it, as above described, and that any number, one, three, or more knives, might be employed on the cutter-head forpolishing, turning, or moulding the rod.

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

1. The arrangement of the inclined cross-cutting knife e with the knives e' e", in a tubular cutter-head, when constructed and operating substantially as and for the purpose above described.

2. The guide F, when constructed with the openings m m, and the notches n n, and operating in connection with the locke and the tubular cutter-head, substantially as and for the purpose set forth.

The arrangement of the grooved rollers R R', at the rear end of the-cutter-spindle, substantially as described.

. FRANKv DOUGLAS.

Witnesses:

ALnnnr S'. BoLLns, En. H. THAMEs.

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