US96756A - Improvement in machine for grinding corrugated knives - Google Patents

Description

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Letters Patent No. 96,756, dated November 9, 1869.

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mPRovnMENT IN MAcHINErFoR GRINDING CQRRUGATBD KNIVES.

The Schedule referred to in these Letters Patent and making pan cf the same.

To all whom 'it may concern Be it known that I, J only B. WILSON, of New York A York, have invented a certain new and useful Ma\` chille forCutting and Grinding Corrugated Knives; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making-part of this application.

My inventionv relates toa machine or apparatus for grinding or cutting corrugated knives, such as used accordingto "Letters Patent granted to me on the 19th day of March, 1867, for cutting corrugated veneers, orsother irregularly-shaped cnt-ters, and has for its object an organized mechanism, by means of which the straight and bevelled surfaces or edges of any zigzag or corrugated knife or cutter` may be perfecily cut and sharpened; and to this end,

My invention consists in lthe employment of a suitablecutter or grinder, in combination with a compound carriage, and a snitableformer, by means of which the cutter or grinder, as itrnns in contact with the stock to be cnt or sharpened, is moved up and down over the face of the stock, and fed along in the direction of the length of the blade or stock, in' a zigzag path of motion, corresponding exactly to theV corrugated shape to be imparted to the said stock or knife, as will be hereinafter more fully explained; and

My invention further consists in the employment, in combination with a carriage which moves along in the direction of the length of the knife Aor stock being .operated upon, and with a zigzag motion, of -a carriage, which moves in a plane parallel to a plane across the face ofthe knife, and provided with a suitable rotary cutter or grinder, for operating on the opposite or' other face of the knife, all as hereinafter more fully described. Y

To .enable those skilled in the art to make and use my invention, I will proceed to describe the construction and operation of` my new machine, referring by letters to the accompanying drawings, in`

whichg Figure 1 isa front elevation; Figure 2, a top view; Figure 3, a vertical cross-section, at :1: iig. 2; Figure 4, a similar 4section at y y, iig. 2; Figure 5, a rear elevation; Figure 6, an end view; Figure 7, top detail view of carriage and former;

Figure 8, skeleton detail view. In the several figures', the same parts will befound designated by the same letters of reference.

A represents the frame of the machine, which may be changed in any suitable manner, forthe support of the shafts and working-parts.

B is the main driving-shafato which the motivepower is applied, and which is provided with a pulley,

O, and drum D, from which pass belts to the ditierent.

shafts to be driven, l

'From the pulley C passesy a belt, E, to a pulley, F, on shaft G, which, like the main shaft B, and another shaft, H,'is mounted inrsuitable bearings or boxes on the main frame A.

' rlhe shaft G' carries the eccentrics I I', which op- ,erate a vibratory carriage, and also an eccentric drinn,

J, from which passbelts to drive pulleys on said care riage, as will-be presently described, and is provided with a spur-gear, K, which meshesinto a gear, L, on the shaft H, and drives the latter.

The shaft H carries a drum, M from which runs tb'e belt N, that drives the shaft O, as and for purposes to be explained. A

I is avibratory carriage, which is hung on pivots at a a, in vertical standards Q Q, and which is vibrated, or moved-up and down by means of pitmen 1t It, lpivotcd to it at b b, and extending upl to the eccentrics I I.

This carriage P is provided on its upper and lower faces with formers c c, and has a lscrew-shaft, S, running through it, which is provided at one end with t-wo fast pulleys, d (l, and a loose pulley, e, which are driven by the` belts fj', from drum J, and effect the rotation alternatelyin opposite directions of the screw-shaft S, and this shaft passing through a lug, T, projecting from the back of a carriage, U, feeds the latter alon'g, or causes it to slowly traversc'back and fort-h on the carriage P.

This carriage U has combined or arranged with it `another carriage, V, which, while it is obliged to travel along with carriage U, is free to play iu and out at right angles to the line of traveliof both, and

is moved in and out by means of theformers c c, in one direction, and springs g, in the other direction.

h h are bearing-points or projections, projecting from the carriage V into the corrugations of the formers c c. v

The carriage V is provided on top with two standards, IV W, in which, in lsuitable bearings, is hung a horizontal shaft, O, provided at cach end with a crankplate, t', and near 'it-s middle, with a pulley, J, which is driven by a belt, N,- from drum M.

From each ofthe crank-plates i extends downwardl a pitman, lf, and these pitrnenk It impart a reciprocatory motion to the carriages y y, which are arranged to slide in ways in the stands ll, and these carriages y y are provided with a horizontal shaft, fm, on which is hung a grinder or cutter, n, and which is driven, through. the medium of a pulley, o2, by a belt, p, passing from said pulley up tothe main drum D.

In the stands l l is hung? another horizontal shaft, q, which carries another cutter, w, and which is also driven, from the drum D, by means of its pulley s and the belt p.

. These shafts and vtheir grinders-being used always separately, or at different times, one to operate on one side of the knife, and the other on the other, the belt p is lifted from the pulley of one to that of the other, as occasion requires.

tis the knife to be cut or sharpened, and which is. supposed to be secured in the tool-stock or car# riage of aveneer-cutting machine, in the usual maunen-and so that it can be moved or adjusted, and

set at any given relative distance from either of the cutters, and at the proper angles to be operated upon.

and so constructed and arranged, that by lmeans of' its handle a, and a spring latch-bar, b, the operator can ship, and cause tobe held, the belts ff, in such manner as to run either of the pulleys d d, and one of these belts being crossed, and .the other straight,- the result of using them alternately on the fast pulleys d d is, that the screw-shaft S is rotated, in first one and then the other direction, to effect the traverse back and forth of carriage U.

I will now explain briefly the general operation of the machine, in connection with the description already given of its several parts. l

As I have before remarked, only one of the grinders is used at the same time.

I will suppose the knife tand the parts c of the machine to be adjusted for cuttingl the bevel-edge of the knife, as illustrated at iig. 3. The cutter n, being now not required, either the belt N is unshipped, or, better, the carriages y, with their shaft and pitmen, all removed.

lThe machine being set in motion from its main driving-shaft, and the belt p placed on pulley s, motion is imparted to the shaft G, and from it, by means of the eccentrics I I, and their pitmen It R, the vibratory carriage P is moved up and down, carrying l with it all its attachments, and the cutter-shaft q,

which, meanwhile, vis rapidly rotated bymeans of the belt 1J, running from drum D.

Either the belt p s hould be elastic, or the drinn D shouldr be hung in rocking bearings, so as to move up and down like carriage P, to keep said belt always at the same tension. I have used the latter plan iu my working-machine. l

At the saine time that the rapidly-revolving cutter is carried up and down, the carriages U and V are carried along during the length of the knife t, by means of the screw S, and the carriage V isforced to play in and ont, toward and from the knife, by means ofthe corrugated formers c c, thus cutting the knife in a zigzag orcorrngated form, in longitudinal section.

When the cutter has been carried the whole length of the knife in one direction, the operator ships the belts f j; and causes the carriages U V-to travel in the opposite direction.

This compound motion of the rotating cutter, back and forth, during the length of the knife, up and down' across its face,- and in and out to form the corrugations, is continued, the knife being adjusted up to the cutter all the time, until this vbevel-edge is cut er finished.-

lhe shaft q, with its cutter w, is now removed; the shaft m, with its carriages y y, and pitmen 7c k, all put in working position; 'the belt p pnt on, and belt N shifted on to pulley J.

Z is a shipper, whichis pivoted at its lower end,

The carriage P P is then disconnected from its vi brating or driving-pitmen It Rand being set at the proper elevation, is securely locked in place. It may be' either supported by a rest from below, or it may be locked to the frame by a lpin passed through one or both its ends, into the main frame, as seen at c, for instance, fig. 4.

The machine is now ready to cut the straight or opposite side of the knife t, andthe latter being adjusted, as seen at iig. 4, the'power is'applied when motion is imparted through belt E to shaft G, thence, by gears K L, to shaft H, from the drum Mof which, passes the belt N, to drive-shaft O.

The pitmen on this shaft drive the carriages y y up and down in their ways, and thus cause the cutter n to travel up andvdown in an oblique direction over the face of the knifet.

The ways are made at precisely the same angle or Obliquity as the plane in which the face of the knife is arranged.

across the obliquely-arranged face of the knife, the compound carriage U V is moved, as described before, by means of the screw-shaft and the corrugated formers, so as to feed the cutter along d'uring the length of the knife, and in and out, to form the corrugations.

It will be seen, that by means of au'orgauized machine, constructed .and operating as I have explained, a corrugated knife-may have both its faces any irregular corrugations may be produced.

It will be understood, that inasmuch as the knife does not have to be reversed, it is immaterial whether the corrugatious of the formers c c be regular or irregular, the opposite faces of the knife must necessarily be exactly alike,and producea eutting-edge which will run in a plane. Since it is not material what shape or direction the corrugations of the formers assumes, it becomes easier and .less expensive to produce theseformers than if they 'had necessarily to be pelfeetly regular in their curves and depressions, as

position of the knife. In fact, I have found it practically impossible to make the former near enough to perfection to enable me to reverse the knife and cnt both sides with .the sameeutter, without making an imperfect edge. l

It will be understood that my machine may be adapted to producing all sorts of corrugatedorirregularly-shaped tools or implements, and thatymany of the details `of construction may be varied without departing from the mode of operation, which I be lieve to be entirely original, by which I am enabled to cut the opposite faces from the same formers, without reversing the position of the knife.

I do not, therefore, wish tobe limited, in my claim of invention, to any particulaiity of detail, construction, and arrangement ofthe parts of the mechanism, so long as the vmachine involves the mode of operation described; but having fully explained my new machine or apparatus for cutting and grinding corrugated or irregularly-shaped tools or knives,

What I elaiin as neugand desire to secure by Letters Patent, is- Y A machine, in which the opposite faces of the knife may he cut in precisely the same irregular form, and at an angle to each other in cross-section, without reversing the position of the knife, by means substantially such as and in the manner hereinbefore set forth.

In testimony whereof, I have hereunto set my hand and seal, this 2d day of March, 1869.

- JOHN B. WILSON. [1.. s.)

Witnesses:

FREDERIC A. SAYER, Cuirs. A. Scorr.

While the cutter n n is thus moved up and down eut and 'shaped in precisely the same curves, and that would be necessary were it attempted to reverse the

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