USRE6667E - Improvement in hydraulic attachments for cotton-presses - Google Patents

Description

2Sheets -.-Sheet1.

s. HUGHES. Hydraulic-Attachment for Cotton-Presses.

Reissued'Sept.28,1 875.

WI T A ESS LS 6 $6 M 2 s heets- Sheet 2.

4 v s, nu sngs. Hydraulic-Attachment for Button-Presses.

Reissued Sept. 28,-1875.

a ttornyp WITNESSES I v I ter be made more powerful, requiring no double UNITED SAMUEL HUGHES,

' HIMSELF AND Parana Gert-en.

IMPROVEMENT IN HYDRAULIC ATTACHMENTS FOR QQTTQN-PRESSES;

. Specification forming part of Letters Patent No. 150,044, dated April 2i, 1874; reissue No. 6,667, dated September 28, 1875 application tiled August 25, 1875.

To all whom it may concern:

Be it known that I, SAMUEL Hucnns, of

ments to a progressive-lever power-press,

whereby different pressures are made to cooperate, and with con stantly' -varying levers, to cause any desired pressure to be applied at any stage during the operation of compression.

Prior to describing my invention, it may be observed that in progressive lever presses, used for pressing and baling cotton, and in which the z'tctuating power is steam, brought to bear upon a piston arranged within a cylinder, and connected with the levers by which a moving platen is operated, it isknown that unless the piston of said steam-cylinder travels the whole length of its upward or compress ing stroke, the full power of the press is not exerted on the material under compression, and no two succeeding bales or masses can be compressed to the same bulk or density unless they are of the same density and size before being compressed, excepting by removing or adding packing, usually termed shiftingboards, and the compressing action of the platen being repeated on the mass. It accordingly not infrequently takes two, and sometimes three, cylinders .full of steam to fully or properly compress a bale of cotton. By my invention each bale or mass may be compressed to the same density or bulk at or by a single compression, and the only limit to the power of the press is the strengthof. the material used in the construction of it.

My inventiog can readily be applied to steam or power presses already in use, and the latpressing of a single bale or mass, and dispensing, if desired, with all packing or shifting boards to follow up the action of the platen.

In the accompanying drawings, Figure 1 represents a partly-sectional side view of my invention as applied to an ordinary progressive-lever press actuated by steam. Fig. 2 is an end view ofthe same. 7 Fig. 3 is a plan of the hydraulic-cylinder portion of the attachment, Fig. 4 is a vertical longitudinal section, upon a larger scale, of my hydraulicp'ower attaelnnent in part; Fig. 5, an end view of the same, with the rear steam and exhaust valve portion thereof in section; and Fig. 6, a plan of the valvergear of the steam portion of the hydraulic-power attachment.

Similar letters of reference indicate corresponding parts. r

A is the steam-cylinder of an ordinaryprogressive-lever press, the piston-rod of such steam-cylinder having the usual double rack B, which is arranged to gear j-With thetwo toothed sectors or nected by rods or pitmen D D with a movable bedor platen, E. This, with the exception of certain details of construction, as hereinafter referred to, is similar to other presses now in use.--;.Gr is the steam-cylinder of the hydraulicpower attachment. The piston-rod H ofthis cylinder passes through a stuffing-box in'the head of the steam-cylinder G, and is provided on its outer end with a plunger, I, arranged to work closely within a hydraulic cylinder, J. K is a check-valve, and connected by a pipe, I), with the hydraulic cylinder J. L is a hydraulic-ram cylinder or chamber, arranged to rest upon a suitable foundation, and connected with the upper platen F of the press. This cylinder is connected by a pipe, I); with the chamber of the oheck valveK in direct communication with the pipe b of the cylinder J, and said cylinder L fitted with a ram, M, arranged to work through it. This ram M is proyided witha curved saddle, S, which is fitted to the platen E.

The connecting rods or pitmen -D D of "the lower'en'ds, to admit of the platen E being forced upward after the piston of the steamcylinder A has completed its upstroke, and the levers or sectors the hydraulic ram, the check-valve K, and the cylinder.J, and connected by a pipe, with the check-valve chamber above the valve.

levers C C, that are conopening downward,

press have elongated eyes or'slots e e at their C C have -n1oved to a position which terminates the upward pulls of the rods 1) D. N is a reservoir, placed above my invention,

7 with oil, water, or other open the check-valve K, thereby allowing the O is the pipe by which steam is supplied to the engine-cylinders A and G, which are litted with any suitable valve mechanism, includingsteam'aiid exhaust valves, a lever, P, serving to operate the steam-valvef, and exhaust-valve g of the cylinder G, also the check-valve K. Thus, themovement of the levers P P to an intermediate position causes all of said valves to be closed. By moving the levers PP to the right, steamvalves fit and check-valve K are opened, the exhaust-valves g by moving said levers to their extreme left the exhaust-valves g 1 are opened and the steam-valvesf and h are closed. The several valve's'hereinbefore referred to are operated by means of rock-shafts, toes, wipers, and other suitable connections. The piston G of the cylinder G is prevented from striking the heads of the latter at either end of the stroke by coming in contact with rods k k running through the cylinder-heads, and connected on the outside with levers, which, in their turn, are connected by rods to other levers secured to the rock-shafts that operate the steamvalves, so that as either rod 10 7c is forced outward by the piston G it opens the steamvalves at such end of the cylinder and admits steam to act as a cushion to the piston. The

cyl-

steam-valve l, at the forward end of the inder G, is closed by a weight on the end of the valve-stem, and is opened only when the piston Gr comes in contact with the rod 7c. The exhaust-valve m, at such end of the cylinder, is opened by alever and weight, n, and closed only when the piston Gr strikes the rod, which causes the wiper operating the valve to leave the toe, when a weight on the end of the valve-stem closes the valve. The valves and valve mechanism, however, form no part of and may, if desired, be of any suitable kind.- 1

To operate the press, fill the reservoir}? suitable liquid, and

liquid to fill the cylinder J and the pipes connected therewith. A hale or mass, Q,'of the material to be compressed, having been placed upon the platen E, steam is admitted to the cylinder A by opening the steam-valve h. This causes the piston of said cylinder to ascend, and by means of the rack B, toothed sectors or levers G O, and connecting-rods D D, draw up the platen E until said piston reaches the end of its stroke or is stopped by the resistance of the material being compressed. Byreason of the attachment of the ram M to the platen E, it is carried with the platen, and the check-valve 15 being open, the liquidfrom the reservoir N flows through the connecting-pipes into the ra n-cylinder L, and fills the space previously occupied by the ram.

Afinishing pressure is then given to the bale by admitting steam to the rear end ofthe cylinder G by opening the steam-valves. This causes the piston G to move forward, and with the plunger I, which forces liquid from and i'remaining closed, and- 'tion, the latter consisting,

2 y ace:

cylinder L, thereby forcing the ram M and" still farther up, and powerfully com platen E pressing the bale between the platens, the elongated eyes or slots 5 e in the rods D -D admitting of, such continued action of the platen E. The bale having been properly tied and ready for taking out of the press, the steam-valve f is closed, and the exhaustvalves 9 i and check-valve K opened. The weight of the movable platen, sectors, and connectingnods, together with the expansion of the compressed material, causes the platen E and ramM to descend, forcing the liquid from the cylinder Lthrou'gh the pipes b 6 into the reservoir N, and by the pipe 1) into thehydraulic cylinder J, thereby driving backward the piston G to the rear end of the cylinder G. 1

The piston G may he assisted in its back ward movement by setting it and its cylinder slightly inclining, as represented.

The same operation is repeated for the next bale or mass, and so on successively for any number of bales, &c., all of which will be compressed to the same bulk or density.

- The circulation is kept up of the liquid between the cylinders J and L by the opening and closing of the check-valve K at each compressing operation, whereby is insured a constant fresh supply of cooling-liquid to the exposed packings, rendering them more durable. It is evident, however, that the foregoing described arrangement and combination of the steam-cylinder A with the hydraulic ram M does not restrict ing, in a progressive-lever press, the direct and independent pressures -of steam and liquid.

- What I claim as new, and desire to secure by Letters Patent, is-

1. The combination, in a lever power-press, of a steam actnated piston, for giving apart of the pressure to the platens, and a hydraulic actuated piston or plunger, for giv-inga part of the pressure to the platens, substantially as and for the purpose described.

2. The combination, in a progressive-lever power-press, wherein the compression is partly effected by the direct pressure of steam, of an independent hydraulic pressure apparatus with the platen of the press, the said hydraulic apparatus arranged relatively to the platen,

substantially as described,.whereby, as the pressure is released from the platen, the liquid will be returned to the primary forcing apparatus.

3.. In a progressive-leverpower-press, the combination, with the piston and steam-cylin der A, of the auxiliary hydraulic cylinder or chamber L and ram M, arranged in relation with the platen E, substantially as and for the purpose described.

4. In a progressive-lever power-press, the rods D D, provided with elongated eyes e e,

or bound my inveIb I essentially, in unit-' cylinder I .in combination with the platen E andjiydranlic jack ,ormm ,M, substantially as and for the purpose described.

5- [n a progressive-lever power-prcsgthe combination of the steam-piston G and its with the plunger I, the cylinder J,

the checkvalve K and pipes 1) b connecting 'the hyd'muiic cylinder J with the chamber L of the ram, all arranged for operation in rein.-

snbstantially as and for tion with each other, the purpose described.

In testimony that I claim the foregoing l have hereunto set my hand this 24th day of August, A. D. 1875:

SAMUEL HUGHES.

Witnessesr THOMAS B. HALL,

E. LNorrmemm,

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