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"A time will come when the science of destruction shall bend before the arts of peace,—when the genius

which multiplies our powers, which creates new products, which diffuses comfort and happiness among
the great mass of the people, shall occupy in the general estimation of mankind, that rank which rea-
son and common sense now assign to it."--ARAGO.

LONDON:

ROBERTSON AND CO.,
MECHANICS' MAGAZINE OFFICE, No, 166, FLEET-STREET.

AGENTS : FOR EDINBUBGH, J. SUTHERLAND;
GLASGOW, W. R. M‘PHUN, AND DAVID ROBERTSON;
DUBLIN, MACHEN AND CO., 8, D'OLIER STREET ;
PARIS, A. & W. GALIGNANI, RUE VIVIENNE ;

HAMBURGH, W. CAMPBELL ;
AND REGULARLY SUPPLIED BY ALL BOOKSELLERS AND NEWSMEN IN TOWN AND

COUNTRY.

1846.

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PRINTED AND PUBLISHED BY J. C. ROBERTSON, 166, FLEET STREET.

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WYLAM's PATENT IMPROVEMENTS IN HYDRAULIC PRESSES.

[Patent dated April 25; Specification enrolled October 25, 1845.] Ir is stated with truth in the introduc

any pressure to which the press itself is tion to the specification of this patent, required to be subjected ; F, is a pipe that “hydraulic presses, as at present by which the reservoir E communicates constructed and worked, are suitable with the valvular governor D; G G2 G3, only for producing high pressures at a are the three pumps before-mentioned, slow rate of speed, and with consider- (connected with and worked by a stearnable intervals of time between each engine or any other convenient first charge and that next succeeding it, (the mover,) from which water is forced up pumps requiring to be stopped for a from the cistern H, through the pipe I, time at every descent of the piston or into the reservoir E; 999, are air cocks follower,) and are wholly inapplicable to attached to the suction pipes of the mechanical operations requiring a quick pumps below the lower valves; K, is a succession of strokes, or impulses, and return pipe, which conveys the water as well strokes and impulses of a small employed in producing each stroke of or moderate, as of a power.”

the piston back into the cistern H, from Mr. Wylam has applied his ingenuity the valvular governor D. The reservoir to the remedy of these defects, and has E is made of larger capacity than either succeeded in producing what will be uni- the press cylinder B', or the supply cisversally admitted to be a most important tern H, because it is intended to hold improvement in this branch of mechani- not only all the water which can be cal science-namely, a hydraulic press pumped into it from H, but all the air which " can be worked unintermittingly which was contained in it originally, and at great rates of speed, and at both high which is forced by the water up to the and low pressures.

top of it in a highly compressed state, Fig. 1 is a plan of one of a set of six and also any air which may be injected hydraulic presses, placed in a row, side into the reservoir by the pumps under by side; fig. 2, a plan of a triple set of the circumstances to be hereinafter expumps, which communicate with a reser- plained. A reservoir bearing the provoir or accumulator of power, shown in portion to the press cylinder B', and plan, in fig. 3, (instead of communicat- supply cistern H, which E is repreing, as usual, directly with the press or sented to do in the figures, would conpresses,) and from which reservoir the tain water enough for about forty-two power is supplied to the press or presses ; single press charges, or six charges for fig. 4 is a sectional elevation of the press each set of six presses ; and three pumps on the line a b of the plan, fig. 1; fig. 5 (as represented in the figures) would is a sectional elevation of the pumps on suffice to enable the reservoir to keep the line cd of the pian, fig. 2; and these presses constantly at work. The fig. 6 is a sectional elevation of the re- figures 7 and 8 represent the valvular servoir on the line e f of the plan, governor D, as of nearly about onefig. 3. A, is the framework of the press, eighth the full size; fig. 7 is a plan, and which is mounted as usual on a strong fig. 8 a sectional elevation of it; fig. 7 foundation of stone or brickwork ; B', is being on the line g h, of fig. 8, and the cylinder, and Bạ, the piston or fol- fig. 8 on the line k i, of fig. 7. All the lower; C, the pipe for the inlet of the parts are represented as in the position water under the piston; D, is a val- they assume when the pumps are in the vular governor for regulating the ad- act of injecting. L, is a box divided mission and escape of the water to and into two vertical chambers, M' M', and from the press, and which is of the pe- one horizontal chamber M’, common to culiar construction separately represent- both the others. In the chamber M', ed in figs. 7 and 8; E, is the reservoir, there is a port, R?, which gives admiswhich consists of a wrought iron air- sion to the water from the reservoir E, tight vessel, which rises considerably through the pipe F; and in the chamber above the level of the press, and is of a M, there is another port, R2, communicapacity many times greater than that cating with the pipe C, which conveys of the cylinder of the press, and of a the water to the cylinder of the press; strength more than sufficient to resist T is a third port in the chamber Mo,

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