US399511A - Exgland - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

' T. C. PAWGETT.

MACHINE FOR PRESSING FABRICS. No. 399 511. Patented Mar. 12, 1889.

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(N0 Model.) '2' SheetsSheet 2.

T. G. PAWGETT.

MACHINE FOR PRESSING FABRICS.

No. 399,511. Patented Mar. 12, 1889.

1 B n i H 11 J0 T i D ml? P P 11 0 X 0 i i K H i In II INVENTOR UNITED STATES PATENT OFFICE.

THOMAS (J. .FAlVCET'l, OF LEEDS, COUNTY OF YORK, ENGLAND.

MACHINE FOR PRESSING FABRICS.

SPECIFICATION forming part of Letters Patent No. 399,511, dated March 12, 1889.

Application filed August 10, 1888. Serial No. 282,442. No model-l Patented in England February 16, 1888, No. 2,339.

To aZZ whom it may concern:

Be it known that I, THONMS CONSlZlNTINE ltAWCErr, a subject of the Queen of Great Britain, and a residentof Leeds, in the county of York, England, have invented certain Improvements in Machines for Pressin Fabrics,

(for which I have been granted a patent in Great Britain, dated February 16, 1888, and j numbered 2932),) of which the following is a specification.

My invention relates to that class of cloth pressing and finishing machines wherein toggles are cm 'iloyed to impart intermittent pressures to the cloth as it is drawn through the press in installments.

My invention will be fully described hereinafter, and its novel features carefully defined in the claims.

I11 the drawings which serve to illustrate myinvcution, Figure 1 is a side elevation,

partly in section, of a machine embodyingmy ,3

improvements. l ig. 2 is a plan of the ma chine, and Fig. 3 is a sectional end elevation of the same.

'A is the bed or base plate of the machine, I the upper pressure-plate, and C the lower pressure-plate. In the bed-plate are fixed six at each side-upright bolts D D. On these bolts the pressure-plates are guided, the up per plate, 13, resting on collars a. (see Fig. 3) on the said bolts. On the bolts D, over the plate 13, are mounted pressuresprings E, the tension of said springs being regulated by nut-s F, or other like means. These springs keep the upper plate pressed elastically down upon the collars a, but allow it to yield to the pressure from. below. The lower plate, C, is supported on two pairs of toggles, G G, which are alike and coupled together at their knuckles by pairs of links H H. These links are coupled (at b) to a pair of connecting-rods, I, which latter are coupled at their other ends to a crank, J, in a crankshaft, J. Rotary motions may be imparted to the shaft J by any of the usual means. In Fig. 1 I have shown it driven from a shaft, M, through the medium of toothed gears K L K L.

The shaft All has the usual tight and loose pulleys, N, to receive a driving-belt.

The throw of crank J is such as to carry the knuckles of the toggles simultaneously past the center or vertical line in both directions, and when the machine in motion the toggles move the lower pressure-plate, C, upward against the upper plate, B, thus pressing the fabric interposed between said plates; 1 but. by reason of the knuckles of the toggles passing beyond the vertical line or center the lower pressure-plate is caused to impart two pressures or squeezes to the fabric at each revolution of crank .I' one on the instroke and one on the outstroke. In order to maintain the fabric under pressure a sufiicient time at each intermittent impulse of the press, the toggles are constructed to raise the lower plate, (I, sufficiently to lift the upper plate, I 3, a little distance above the collars a upon the bolts D. The eifect of this is to maintain the pressure upon the fabric during the time the plate B is rising and falling, and not alone at the moment when the knuckles of the toggles are passing the center. Thus the machine im- 1 parts two pressure impulses at each revolui tion of the crank, and it imparts a prolonged pressure at each impulse.

In Fig. 1 I have shown the press with the near set of bolts D removed and one of the toggles G, and the adjusting devices of the toggles, in section, the better to illustrate their const notion. Fig. 3 also shows the toggles away.

In this machine the fabric in the form of a strip is fed intermittently into the press in installments, the feeding being effected quick- 1y while the press is open. The fabric may be simply passed through the press from one side to the other and but one plyor thickness be exposed to pressure; but I prefer to take up the fabric on the same side from which it is supplied, the bight of the strip passing over a bar or roller on the other or opposite side. Thus two superimposed plies of the fabric will be pressed simultaneously.

Iwill describe the mechanism by which the fabric is fed. The pile of fabric, 0, from which the strip is fed into the press, is represented by broken lines in Fig. 1. The arrows indicate the course of the strip through the press over the idle-roller c and back through the press to the feeding or winding-0n roller P. This latter roller, by peripheral contact, forms in section and part of the bed-plate A brokenthe pressed fabric into a roll, 0 Intermittent rotation is imparted to the roller P, each impulse sufficing to renew the fabric between the plat-es B and C, or nearly so, by the following-described mechanism. On the shaft of roller P is fixed a pinion, l, which gears with a spur-wheel, h. A radial arm, g, which swings on the CGHtGItOf the wheel h, carries a gravitypawl, j, which engages the teeth on said wheel. This arm g is coupled by a rod, f, to the pin 6 of a crank, 01, fixed on the shaft J. Rotation of crank 61 imparts vibration to arm and through it and pawl j to wheel h. In order that the rod f may only be actuated by the crank (1 during that period of its rotation when the press is open, said rod has a slot, e, in its end, in which the crank-pin 8 plays. This slot allows the proper amount of lost motion, and the crank (Z will of course be so set as to impart the proper motion to the rod f when the pressure on the cloth is relaxed.

The lower pressure-plate, C, may be heated by steam admitted to a serpentine passage therein at a steam-inlet, n, as represented in Fig. 3. The plate C is broken away in Fig. 1,in order to show the conduit or passage therein for the steam.

The means for adjusting the plate C to the proper elevation is illustrated in Fig. 1. This consists of a wedge, 0, arranged under the step 19 of the toggle. A screw, as seen at the left in Fig. 1, may be used to set in the wedge 0; but this is not absolutely essential.

Having thus described my invention, I claim- 1. The combination, with the upper press ure-plate and its springs and the lower pressure plate, of toggles arranged under said lower plate, a crank-shaft, and rods connecting the knuckles of said toggles with the crank in said shaft, said crank being constructed to move said knuckles past the center, whereby two pressure impulses are imparted to the press at each revolution of the crank-shaft.

2. The combination of the upper and lower pressure-plates, the toggles arranged under the lower pressure-plate, the rods connecting said toggles with the crank in the shaft J, the said shaft, the crank cl thereon, the arm g, its pawl j, the slotted rod f, connecting the arm g with crank (Z, the toothed wheel h, engaged by pawl j, the cloth-feeding roller P, and the pinion Z on the journal of roller P, gearing with the wheel 71, substantially as set forth.

3. The combination of the upper and lower pressure-plates, the crank-shaft, the toggles coupled together and connected to the crank in the crankshaft, the steps 13 under said toggles, and the adjusting-wedges 0 under said steps, whereby the lower pressure-plate may be set to the proper elevation.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

THOS. G. FAVCETT.

\Vitnesses:

ARTHUR B. CROSSLY,

Commercial Street, lfalzjfaa'. Jos. Boo'rn,

124 Shakespeare Street, Leeds.

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