US113618A - Improvement in machines for cutting leather - Google Patents

Description

HORACE H. BIGELOW, OE WORCESTER, MASSAGEUSEZIIS.

Letters Patent No. 113,618,7dated April 11, 1871.

IMPROVEMENT IN MACHINES FOR CUTTING LEATHER.

The Schedule referred to h1 these Letters Patent and making part: of the Same.

To all whom it may concern.

Be it known that I, HORACE H. Brannon', ofthe city and county of lVorcest-er and State of Massachusetts, have invented certain new and useful Improvements in Machinesfor Cutting Leather; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing which forms a part of this specication, in whichy Figurel represents a Vfront view Aof my improved leather-cutting machine Figure Zrepresents a side View of the same;

Figure 3 represents a plan of the die-supporting spider; and ,Y

Fignrel represents a horizontal section of a portion of the machine, showing the feeding-dog and ratchet.

To enable those skilled in the art to whichm y invention belongs to make and usethe saine, I'will proceed to describe itl more in detail.

-Thevnatnre of my invention consists- First, in the combination, with the cutting-die, of a rotary bed or blockeand mechanism for rotating the same, as and for thepurpose hereafter set forth.

Second, in the combination, with the. Vertical oper l. ting bar and cutting-die, of the peculiar connecting devices, as hereinafter described.

rIhird, in the combination, `with the operating shaft and driving-pulley, of peculiar clutch and stop vdevices, as hereafter described. A

In the drawing- A indicates the supporting-frame.

B, the driving-pulley which operates the eccentric G.

D, the eccentric arm which is pivoted to the upper end of the vertical operating bar E.

F is the cutting-die;

G, the rotating cutting-block or hed; and

H,-the starting treadlef Y rEhe rotating cutting-block or bed G is supported upon a circular plate, I, fixed to the upper end of a pintle-bar, J, which latter forms a center' upon which the block G- turns.

The plate I is provided withdiagonal ratchet-teeth yor notches around its edge to receive the corresponding teeth upon theactnating dog Kby means of which the plate I and block G are rotated. Y

The plate I rests upon a screw-bolt, L, set in the front partvof the frame, and, by raising or depressing the screwlbolt,rthe block G can be adjusted to the `proper height.

The dog K, which rotates the block-supporting plate I, is 'connected by a curved rod, M, to the verti-4 die-spindle Q. -tig.i3, and works loosely between the ring l? and platen upper part of the frame A, as indicated, and is operated `up anddown by the eccentric O and arm D in a manner similar' to the ordinary power punch.

To the lower end of the operating bar-is attached a circular platen, N, having at its under side-1a ring, l?, of' the same diameter as the platen N, and secured thereto in this instance at three points by studs a.

Between the ring I and platen N is arranged an armed spider, O, which issecnred to and supports the 'lhe spider O is of the forni shownin N. Its arms are of such length that the die-spindle Q can be moved to any position within the ring without the end of either arm being drawn inside the circle..` i Y A swivel head, R',"is arranged upon the lower end of the diespindle Q, in which the handle 0i' the cutting-die F is securcdby a set-screw, d. The swivelhead It permits of the die being turned in any direction, as desi-red.

' Ihe th'iving-pnlley yis hung loosely upon the eccentric shaft C', 'and upon the end ot' the shaft' ont- @side0 the pulley B is a crank, S, rigidly keyed to the shaft, and furnished at its end'with a pawl, T', which engages with ratchet-teeth aforlned upon the inside fofthe pulley-rim, as indicated. The pawl is pressed outward by means of a spring, f, so that it will catch the teeth c when not otherwise prevented. lAout-ved guard, V, is arranged at the side of the pulley B, and the pawl I is provided 'with a projectinglng,'e, which runs up onto the guard V, and ther by throws the pawl out'of clutch with the teeth 'c on the pulley-rim. v

The guard V is fixed to the end ot a transverse bar,

,`ai1d it can be moved outward, to disengage thc lng e, by means ot" abelI-crank lever, lV, fulcrnined at its heel to the rear part oi' the frame A, .and having its horizontal arm connected to the treadle H by a rod,

mY, all of which is fully :illustrated in 4the drawing.

A suitable spring is arranged on the bar x to draw the guard vV up to the side of the pulley B.

The operation of my improved leather-cutting machine is as follows:

The operator arranges the leather upon the block or cuttingbed Gr, places the die F in the proper position above the leather, and presses down the startingtreadle H with his foot. rllhe guard V'is thereby moved outward to .free the pawl T, which is thrown outward by the spring f and caught by the teeth con the pulley-rim. The pulley B being in motion re volves the crank S and shaft C', and the eccentric O pressing down the die F in the manner heretofore eX-` plained,'forces it through the leather, while the dog K is carried below the ratchet of th'e plate I. Then, as the operating-bar and parts connected therewith rise, the dog K engages the ratchet-and moves forward the plate l and block G, so that the next cut of the die F will fall upon the block G in a different position.

As the crankI S completes its revolution-the lug e runs up onto the gnard V, which throws out the pawl T, and the vmotion of the eccentric ceases until the treadle H is again depressed. l

It will be observed that the rotation of the block or bed G prevents the die from Wearing hollows in its upper surfaceby being used too long in one' place, as is` oft-en the case with a stationary block or .bed when the position of the die upon fthe block is governed by the operator. The relative positions of the block and die in my improved machine being governed wholly by mechanism, and independent of the operator, the rblock is subjected to a uniform wear upon its wholel surface, and, as a consequence, requires to be seldom trimmed off or leveled.

The cutting-die F may be attached to the swivelhead R by means of sliding arms, adjusted by screw devices, so as to receive and hold different sizes of dies, which can thereby be readily attached and detached to or from the die-spindle, and I have used for Ithis purpose a right-and-left screw, which I find to work admirably for the purpose.

The spider O may be made with a more or less number of arms than that shown in the drawing when desired.

Having described my improved machine for cutting leather,

What I claim therein asV new and of my invention and desire to secure by Letters Patent, is

l. The combination ofthe'cutting-die, rotating bed or block G, ratchet-plate L'dog K, and arm M, substantially as and for the purpose set forth.

. 2. The combination, with the vertical operating bar E and die-spindle, of the platen N, supporting spider 0, and ring P, substantially as and for the purpose set forth.

3. The combination, with the eccentric shaft C' and driving-pulley B provided with ratchet-teeth c, of the crank S, pawl T, guard V, rods and Y, bellcrank lever W, and treadle H, substantially as and for the purposes set forth.

HORACE H. BIGELOW. Witnesses:

, OHAs. H. BURLEIGH,

A. E. PEIRGE.

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