US146237A - Improvement in paper-cutting machines - Google Patents

Description

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UNITED rkslikt-"Pisis ATENT OFFICE.

i Tl-IOMAS BROWN DOOLEY, OF BOSTON, MASSACHUSETTS ASSIGNOR OF jONE-HALF HIS RIGHT TO LORENZO M. DYE'R, OF SAME PLAGE.

IMPROVEMENT IN PAPER-CUTTING MACHINES.`

Specication forming part of Letters Patent No. 146,237, dated January 6, 1874; application filed February 14, 1873.

To all whom @t may concern:

Be it known that I, THOMAS BROWN Doo- LEY, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and Improved Power Paper-Cutter, of which the following is a specication, reference being had to the drawings annexed.

The nature of my invention is that of a Y machine with a frame, and with a raised platformen which bundles of paper may be laid, the frame having a cutting-blade which lifts and lowers in a peculiar manner 5 also, in certain attachments of cog-wheels, shafts, &c., by which motion is communicated to the machine; and the object of the same is to cut smoothly the edges of bundles of paper sheets.

Figure 1 is a view of the machine from the front. Fig. 2 is a side view from the right hand in Fig. 1. Fig. 3 is a view from the top. Fig. 4 is a view in detail of one portion of my device, and is hereinafter explained.

In the drawings, A AX, Fig. 1, A", Fig. 2,

are two upright slabs of metal, called the standards.77 These are cut away to diminish their weight in any convenient manner. (See Fig. 2.) B, Fig. 1, is a slab of metal, passing from the standard A to the standard A horizontally, which secures the two standards to each other. Another similar slab is similarly attached on the other side of the machine. O, Fig. 1, C C", Figs. 2-and 3, is a horizontal platform, passing from one standard to the other, and firmly secured to the saine. D, Figs. 1, 2, and 3, is` the upper brace, being a slab of shape as seen in the figures, which passes from and over the top of one standard to that of the other, and is firmly fastened to both. In Fig.A 2 is seen, at E, a perpendicular oblong slot in the upper part of the standard Af, the center of which slot is coincident, perpendicularly, with the center of the upper brace D. The other standard A, Fig. 1, has a similar slot. They arecalledtheblade-slots. Passing horizontally (see Fig. l) through these two slots isA a slab of metal, F, Figs. 1, 2, and 4, called the blade-bar.77 This blade-bar is supported' bytwo` arms, FX F", Fig. 1, in which igure their shape is seen. They are called the blade-bar' arms,77 and hang and move loosely from two rivets orpins .attached to the upper brace D. In the lower part of each ofJ them is an oblong slot, whose longest dimension is in a perpendicular line. In these slots, rel .spectively, slide up and down two boxes or ends of them-their further ends in Fig. 1-

penetrating and being attached to the bladebar F, which they thus support. In Fig. 1 are seen, above and below, respectively, these boxes FZ F, two set-screws for each box, passing through the bodies, respectively, of the blade-bar arms. By unscrewing the upper setscrews, and screwing up the lower ones, or vice versa, these boxes are, at pleasure, raised or lowered, carrying with them the blade-bar F and the blade G. I sometimes, instead of this device, use a cross-bar with diagonal slots, attached to the standards, in which slots the ends of pins attached to the blade-bar move up and down.. The. blade-bar F, Figs. 1, 2, and 4, carries, iirmly secured to it at its lower edge, the blade G, which is a blade of steel, sharpened at thelower edge. This bladebar F is hollowed at the right-hand endgin Fig. 1 with an aperture, which is oblongin vertical section, (see Fig. 2,) and passesa'bou one-quarter of its whole distance into the bladebar. (See dashed lines in Fig. 4.) I sometimes have my blade hollowed, and dispense with the blade-bar H, AFig. 4, isV a `pin or short shaft fastened in the blade-barF, atA right angles to it, crossing the aperture, upon which hangs,the blade-bar rod I, Figs. 3 Aand 4. This blade-bar rod is adjustable, being lengthened or shortened thus. It bears at its lower end (seen in Fig. 4) a projection at right angles to it, in which is an aperture furnished with a female screw. Into this aperture passes a male screw, J, Fig. 4, the other or left-hand end of which passes through an arm, K, called theb1adebarrod arm, which is borne on a pin, upon which it turns. This pin `is placed, eccentrically, on the side of awheel or pulley, L, Figs. l, 2, 3, and 4, which wheel is furnished with cogs on one-half its periphery, as seenin Figs. 1 and 4, called the blade-bar-falling wheel. The screw J has, on each side of the arm K which bears it, a nut, by which nuts it is held wherever desiredon the arm K. The bladebar-falling wheel (so called because it causes the blade-bar to descend) L is borne by appropriate bearings, in lwhich its shafttsee Fig.

1) moves, attached to the side of the standard`r half its periphery. I call these wheels, L and N, half cog-wheels? These two VKwheels L and N are so keyed upon the shaft as that the portions respectively of them armed with cogs Y are on opposite sides of the shaft which bears them, so that when one of the pair is rotated by the cog-wheels below, as hereinafter dcscribed, the other, presenting no cogs to be' geared with, is not operated on'. I now pass to that portion of the machine at which motion is communicated. At the left hand in Fig. 1 is seen a fly-wheel, P, to regulate the motion of the machine, keyed onto a shaft, Q, which bears two clutch-pulleys, R and S, Figs. 1 and 3, moving freely on the shaft. The pulley S is worked with a cross-belt, (not seen in the drawings,) and, receiving its motion from the same counter-shaft above, turns, therefore, in a different direction from the pulley It. T, Figs. 1 and 3, is the clutch, worked by the clutch-lever U, Figs. 1 and 3. This clutch is borne by a projection from the side of the standard A, and is arranged in the usual manner, with a slotand a spline, upon the shaft Q. V, Figs. 1 and 3, is a cog-wheel borne by the shaft Q, and rotating with it. It gears into another cog-wheel, W, Fig. 3, (the upper part of which is also seen in Fig. 1,) borne by a shaft, Y, (seen in dotted lines in Fig. 3,) passing beneath and across the platform U C at the upper side of it in Fig. 3. At the righthand end or side in Fig. 1, but seen only in Fig. 3, the shaft Y bears a bevel-wheel, Z, Figs. 2 and 3, which gears into another bevelwheel, B x, at right angles to it, borne (see Fig. 2) by the shaft D", which shaft is borne by appropriate bearings projecting from the side of the standard AX. This shaft Dx bears two cog-wheels, one, E X, exactly beneath the wheel L, and gearing with it, and the other, F", cX- actly beneath the wheel N, and gearing with it. The rotation of these wheels EX and FX thus rotates the wheels above them when the cogs with which the upper wheels are partially armed are down.

The operation of the invention is as follows: The blade-bar F being supposed to be at its highest elevation, a bundle of paper whose edges are to be cut is placed upon the platform, with the portion to be cut off protruding on the hither side, in Fig. l, of the line (perpendicularly) of the blade G. The belt on the clutch-pulley It, and the cross-belt on the clutch-pulley S, being put in motion, the handle of the clutch-lever U is drawn to the right, when the ratchet-teeth of the clutch gear into the pulley It,',thus, by means of thesloty and spline of the clutch, rotating the shaft Q and the cog-wheel V. The cog-wheel W and its shaft Y are thus rotated, carrying withthem the bevel-wheel Z, Fig. 3, with the bevel-wheel BX, thus rotating` the shaft Dwit'hit's cogwheels EX and FX.Y *The blade-bar,- falling wheel L is so keyed to its shaft as ythat when the blade-bar is 1 at its highest elevation the Vfirst cog of the seriesiof cogs which surround half its periphery comes into gear with the cog-wheel E", when the wheel L and its shaft ,perform a half of a complete rotation. The

cog-wheel F. being smaller than the wheel L, this half rotation is comparatively slow. The blade-bar-rod arm K being thus rotated, the blade-bar rod I isdrawn to the right in Fig. 1, thus swinging the blade-bar and blade down till it reaches the platform; and at this time the blade makes a drawing cut, and the func- ,tion of the machine is performed. The cogs on the wheel L have, by this time, passed their co-working cogs ofthe wheel Fix, which wheel now has no action'on the wheel L, but at this time the cogs of the blade-bar-lifting wheel N (this wheel being appropriately keyed on its shaft) come in contact with the cogs of the wheel FX, (see Fig. 2,) when another semirotation of the shaft bearing the wheels N and L is performed, completing the rotation of the blade-bar-rod arm K, and pressing back the blade-bar rod I, thus swinging the blade-bar up away from the platform. The cog-wheel FX being larger in proportion to the wheel N than the cog-wheel E is in proportion to the wheel L, the motion of the wheel N is faster than when the cog-wheel E was drawing the blade down.

I thus economize time in the action of the machine, and do this without hurrying the machine at the critical moment of its action.

It is often the case that, in cutting a bundle of paper, it will get disarranged, when it is of great advantage to stop immediately the descent of the blade, and cause it to rise again without having reached the platform. Todo this I simply move the handle of my clutchlever to the left, when the clutch is moved from the clutch-pulley R and putin gear with the clutch-pulley S, (with its'crossbelt,) when the blade, how vfar soever it may have descended, immediately rises.

When the machine is to be quiescent, the clutch is moved, by its lever, to a location midway of the two clutch-pulleys, and touches neither. The blade-bar is seen to be suspended by the two blade-bar arms. I prefer lthis feature as obviating the friction encountered by other methods of holding the blade-bar, but I do not claim it. When the blade is worn away by use it will not reach the platform, though the blade-bar has descended to its lowest elevation, and would thus leave the lower sheets of the bundle uncut. I then unscrew the necessary distance the two screws in the arms Fx Fx, which are below, and screw in the two upper screws, thus lowering the two boxes or bearings F Iiyand with them the blade-bar land blade.

I have another device for taking up the wear of the blade. When thisis necessary, I simply screwlthe screw J, Fig1 4, up farther into the projection of the blade-bar 'rod I, (adjusting and fastening it by means of the nuts it bears on each side of the arm K,) thus "irtually shortening the rod' I, when the rotation of the Wheel L (as thepin bearing the arm K is carried to its farthest point from the bladebar) isenabled to bring the blade G fully'down upon the platform, notwithstanding the blade may have been narrowed by Wear.

'It has been stated that the knife-bar F is hollow for a certain distance, having an aperture into which the blade-bar enters. By this arrangement I bring the line of the tractive force exertednpon the rod I, as nearly as pos- THOMAS BROWN DooLEY.

Witnesses:

LEMUEL P. JENKs, GEORGEL. DYER.

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