IMPROVEMENTS IN HYDRAULIC PRESSES
Year: 1887

page_text: Date of Application, 19th Jan., 1887
Complete Left, 14th Oct., 1887
Complete Accepted, 15th Nov., 1887
I, WILLIAM ORAM, of Greengate Iron Works, Salford in the County of Lancaster,
Steam and Hydraulic Engineer do hereby declare the nature of said Invention for
IMPROVEMENTS IN HYDRAULIC PRESSES, to be as follows:-
My present invention relates to improvements in the hydraulic presses described in
the first part of the Specification to the Letters Patent No. 1029 granted to me on
26th March 1868, wherein two rams are employed an inner and an outer one both
contained in one cylinder the pressure of water being first admitted to the top of the
inner ram and when the outer ram and table have been lifted to a certain height the
water pressure is directed to lift both rams to the end of their stroke. In this
arrangement the leather for the inner ram was fixed at or near the bottom of the
outer ram which necessitated lifting out both rams before a leather could be
renewed.
My present improvements consist in boring the outer ram throughout its whole
length and placing the leather at the top of the inner ram and further making the top
of the outer ram loose and removable by which means the leathers may readily be
renewed without lifting out both rams as heretofore.

page_text: I WILLIAM ORAM of Greengate Iron Works Salford in the County of Lancaster
Steam and Hydraulic Engineer, do hereby declare the nature of said Invention for
IMPROVEMENTS IN HYDRAULIO PRESSES, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
My present Invention relates to improvements in the hydraulic presses described in
the first part of the Specification to the Letters Patent No. 1029 granted to me on
the 26th March 1868 wherein two rams are employed an inner and an outer one both
contained in one cylinder the pressure of water being first admitted to the top of the
inner ram and when the outer ram and table have been lifted to a certain height the
water pressure is directed to lift both raus to the end of their stroke. In this
arrangement the leather for the inner ram was fixed at or near the bottom of
the outer rain which necessitated lifting out both rams before a leather could be
renewed.
My present Invention consists in boring the outer ram throughout its whole length
and placing the leather at the top of the inner ram and further making the top of the
outer ram loose and removable by which means the leather may readily be renewed
without lifting out both rams as heretofore.
And in order that my Invention may be fully understood and readily carried into
effect I will describe the accompanying two Sheets of Drawings reference being had
to the figures and letters marked thereon.
Figure 1 represents in sectional elevation one arrangement of hydraulic press
constructed according to my present Improvements.
In this view. a designates the main cylinder which contains the outer or large
ram b which acts as the cylinder for the inner or small stationary rain c. The outer
ram is bored throughout its whole length and its leather d is fitted in a recess near
the top of the cylinder a as in my aforesaid Patent but the other leather e is fitted in
a recess near the top of the inner ram c instead of near the bottom as before and the
leather is held in position by a disc or circular plate bolted to the ram c. The
cylinder a is covered by a ring or cap 7 bolted to it and the top of the outer or
large ram b is made a separate piece and is bolted to the ram b to prevent leakage
the loose top has a leather or packing on its under side to which is bolted a
disc h².
By means of this arrangement either of the leathers d or e may be readily renewed
without lifting out both the rams as was formerly necessary but by simply releasing
the bolts and removing the loose top h. Water for the preliminary pressure is
supplied through the pipe i and telescopic tube to the space between the underside
of the top and the inner stationary ram o whereby the outer ram b is forced upward
and the tablej raised a certain distance until water is also supplied through the pipe k
and comline with the water supplied through the pipe to give the final pressure.

page_text: While the ram b is being raised by the pressure of water supplied through the pipe i
the cylinder a is supplied with water through the pipe valve k² and pipe k. The
water is regulated to work the press by means of the handles m' which control the
valves in the regulating box m.
The arrangement shown in Figure 2 agrees in all respects with that illustrated by
Figure 1 except that water for the preliminary pressure is supplied from the pipe i
through a central passage c¹ formed in the inner ram c water for the final pressure
being supplied through the pipes & and i combined as before.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
The several improvements in hydraulic presses herein specified which improve-
ments consist essentially in boring the outer ram throughout its whole length and
placing the inner leather or packing at the top of the inner ram and in making the
top of the outer ram a separate detachable piece substantially as and for the purposes
herein described and as shown.
H. B. BARLOW,
17, St. Ann's Square, Manchester,
Agent for Applicant.