US920934A - Hydraulic-pressure apparatus for cane-mills. - Google Patents

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w. JQDYER & H. G. GINAG'A. HYDRAULIC PRESSURE APPARATUS FOR CANE MILLS.

APPLICATION FILED APB. 6.1908. I

920,934, Patented May 11, 1909.

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W. J. DYER & H. G. GINAGA. HYDRAULIC PRESSURE APPARATUS FOR CANE MILLS.

APPLIOATION FILED APR. 6.1908..

Patented May 11, 1909.

2 SHEETS-8HEET 2.

UNITED STATES PATENT orrron.

WILLIAM J. DYER, OF HONOLULIL'ANDI-IENRY Gr. GINAOA; OF PUPUKEA, TERRITORY OF HAWAII, ASSIGNORS TO HONOLULU IRON WORKS COMPANY, OF. HONOLULU, TERRITORY OF HAWAII, A CORPORATION OF TERRITORY OF HAWAII.

HYDRAULIC-PRESSURE APPARATUS'FOR CANE-MILLS.

Patented May 11, 1909.

Application filed. April 6, 1908. Serial N 0. 425,508.

T 0 all whom it may concern:

Be it known that we, WILLIAM J. DYER and HENRY G. GINAOA, citizens of the United States, residing at Honolulu and Pupukea, respectively, in the county of Oahu, Terri tory of Hawaii, have invented newand useful Improvements in Hydraulic-Pressure Apparatus for Cane-Mills, of which the following is a specification.

Our invention relates to hydraulic pressure apparatus employed to maintain pressure on the rollers of sugar cane mills, and particularly to the accumulators and piping of such apparatus. This pressureis usually applied to the top roller of a three roll cane mill by means of two hydraulic jacks pulling downward on the caps of the two journals of the roller, these jacks being actuated by the fluid from one accumulator. The pressure is adjusted by altering the number of Weights placed on the accumulator, and the latter is made large enough to take up the displace ment of liquid in both jacks when the roller is forced to its upward limit of lift.

Our invention contemplates a twin accu mulator, one for each jack, such that the pressure on the journals may be regulated independently of each other, as is often desirable, particularly with single pinion rollers; but this twin accumulator is to occupy practically no more space than the single accumulator heretofore used. The bumper blocks, which support the weights when the accumulator is not in use, are to rest upon the foundation and not on the base-plate as heretofore, thereby relieving the latter from breakage due to the impact of said weights. In case of trouble with the twin accumulator, as for example caused by a defective packing, both jacks are to be operated temporarily from one accumulator while the defect in the other accumulator is repaired, thereby prevelllting the necessity of shutting down the mi 1.

To this end. our invention consists in the novel features of construction and combination of parts hereinafter described and claimed. I

In the accompanying drawings, Figure 1 represents in elevation and part section a tw1n accumulator embodying ,our improvements. Fig. 2 is a plan view ofthe complete apparatus with the weights and upper portions of the accumulators removed. Fig.

3 is a plan view of a lower weight. Fig. 4 is a sectional view of a lower weight on the line A B. of Fig. 3 and also of the supporting and guiding washer. Fig. 5 is a plan view of one of the half weights.

Referring to the drawings, the base-plate 1 is anchored by the bolts 2 to the concrete or other foundation 3. Two vertical cylinders are formed of hydraulic pipe or tubing 5 screwed into heads 6 and 7. The lower cylinder heads 6, bolted by the bolts 8 to the base-plate 1, are each provided with a lug 9 for pipe connection in the usual manner. A cover plate 10 is secured by the studs 11 to each upper cylinder head 7 and holds the packing 12 in place. The piston 13 andtwo tension rods 14 are bolted to the yoke 15, the rods 14 passing through the holes 16 in the cover plate 10. Asupporting plate or washer 17 is bolted to the lower ends of the rods 14, and rovided with the hole 18 adapted to fit loose y over and be guided by the pipe 5. The lower weight 19 with its recess 20 fits over the supporting washer 17, and is preferably shaped as shown, Figs. 3 and 4. The central hole 21 in the weight 19 permits the rods 14 and the cylinder head 7 to pass through same. The half weights 22 are stacked on the lower weight 19 in pairs with joints alternating, Fig. 1. Each weight 22 is provided with holes 24 in which bars may be inserted for lifting, and with notches 25 26 to clear the cylinder pipe 5 and the rods 14 respectively, Fig. 5. A relief screw 27 is provided in each cylinder head 7, Fig. 1, by opening which the cylinder may be relieved of pressure. The usual channel 28 is provided in the lower end of the piston 13 to limit the upward stroke by relieving the pressure. Wooden bumper blocks 29 are in serted in the holes 30 cored through the base plate 1, their lower ends resting directly on the foundation 3.

The pipes 31 32 connect the jacks 33 34, under the journals of the cane mill, with the lugs 9 of the twin accumulators respectively, Fig. 2. By-pass pipes 35 37, rovided with valves 36 and 38 39, connect t 1e pipes 31 32 respectively. Valves 40 41 are introduced in the pipes 31 32 between the by-pass pipes 35 37 respectively. The pipe'42 connects the pump 43 with the by-pass pipe 37 between the valves 38 and 39.

It will now be noted that either of the twin accumulators may be pumped up by opening i valve 38 or 39 and operating the pump 43. y The pressure will then be applied to the jacks 33 84 by independent accumulators when l valves 40 and 41 are open. If however the l valve 36 be opened and either valve 40 or 41 l he closed, the pressure will then be applied to both jacks from one of the accumu ators i only.

Ne claim:

1. The combination with two jacks adapted for use with a member upon the ends of l which it is desired to exert a uniform presl sure, of a pair of accumulators of like power l mounted side by side beyond said jacks, a pipe leading from each accumulator to one of the jacks to actuate them alike, and valved connections whereby both jacks maybe operated from one accumulator.

2. The combination with two jacks adapted for use with a member upon the ends of which it is desired to exert a uniform pressure, of a pair of accumulators of like power mounted side by side beyond said jacks, a a pipe leading from each accumulator to one of 1 the jacks to actuate them alike, shut-oil valves in said pipes, a valved pipe connecting said pipes between said valves and the l jacks, a supply pipe connecting said first i named pipes between the accumulators and 1 said shut-elf valves and provided with two i shut-oil valves and a pump having connection 3 with said supply pipe between the valves 1 thereof. l

3. An accumulator comprising a base, a

stationary vertical cylinder on the base and provided at its lower end with an inlet, a piston extending through the upper end of the cylinder and provided at its upper end with a cross piece or yoke, rods depending from said yoke at opposite sides 01' the cylinder, a weight supporting plate connecting the lower ends of the rods, and laterally-removable two-part weights mounted on said plate with their abutting edges having mating rccesses for said rods and cylinder.

4. An accumulator con'iprising a vertical stationary cylinder, a piston working in the upper end thereof and. provided with a cross head or yoke, rods depending from said yoke,

i a supporting plate connecting the lo 'er ends of said rods, a lower weight on the plate havmg a central pertnre lor the cylinder and recesses [or the guide rods, and divided weights on said lower weight provided in their ahutting edges with mating recesses [or the cylinder and rods.

In an accumulator a divided weight having central mating recesses, extended at ,their opposite sides and other mating recesses at opposite sides of said central recess whereby the welghts may be piled to breakomt as shown.

Yi'itnesses: H

lton'r. J. PRATT, RoB'r. SCOTT.

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