RAISING HEAVY WEIGHTS BY MEANS OF A PORTABLE HYDRAULIC PRESS
Year: 1852

page_text: LETTERS PATENT to Richard Dudgeon, of New York, in the
United States of America, Machinist, for the Invention of
"RAISING HEAVY WEIGHTS BY MEANS OF A PORTABLE HYDRAULIC
PRESS."
Sealed the 13th January 1853, and dated the 25th November 1852.
PROVISIONAL SPECIFICATION left by the said Richard Dudgeon
at the Office of the Commissioners of Patents, with his Pe-
tition, on the 25th November 1852.
I, RICHARD DUDGEON, of New York, do hereby declare the nature
of the said Invention for "RAISING HEAVY WEIGHTS BY MEANS OF A POR-
TABLE HYDRAULIC PRESS" to be as follows:-This press is a simple
cylinder, of from three to five or more inches in diameter, according
to the power desired, with an enlarged head, having an opening for
the reception of the lever by which the piston of the pump is
worked. This cylinder, with its enlargement, contains just as inuch
water or other fluid as is required to fill the vacancy caused by the

page_text: raising of the interior shaft in the act of lifting, and when this is
accomplished the water is returned into its original recess by a
valve operated on by the lever that works the pump. The press is
portable.
At Figure 1, in the Tracing, A, is the head of the ram, made of
metal and hollow, so that its capacity, together with that of the ram
(which is also hollow), is equal to the capacity of the cylinder E.
G, is the bottom of the cylinder screwed on as seen in Figure 2,
and F, is the stuffing box on the top of the cylinder to steady the
ram, and also to be an additional safeguard against any leak which
might arise from imperfection in the cylinder E, and is screwed on
in the same manner. At B, the force pump lever C, slips on to
work the press and may be taken off at pleasure; D, is a small pro-
jection upon the head A, through which a pin passes, which forms
one of the force pump lever joints seen in Figure 2.
'
Figure 2, represents an interior vertical section seen from the same
position as Figure 1. The lever G, is at its lowest limit, and has come
in contact with the small rod C, which at its lower extremity passes
through the valve F, opening it, and the valve F, coming in con-
tact with the stern of the valve h, in the end of the ram, opening
it, and allowing the water to flow out of the cylinder through the
valve h, by the small holes t, t, into the force pump, then through
the valve (in the piston of the force pump), through similar holes,
9, 7, into the space within the ram E, connected with the space in
the head represented in this Figure. This explains the mode of
lowering a weight or lowering the press, and in raising a weight
it is only necessary to turn the lever over, when the small projection
V, on the lever C, will not allow it to come far enough down to
.strike the rod C; and then every stroke of the force pump will force
a quantity of water into the cylinder by the same passages as, in the
case of lowering, it was discharged from the cylinder into the ram.
.K, is a follower or junk ring to keep the packing u, u, against the
force pump J, which is fitted into the end of the ram. On the end of
the force pump piston there is a junk ring d, to keep the packing

page_text: against the piston of the force pump. At d, the pump rod I, is
attached to the lever with a joint; and at d, and D, there are two
other joints, which maintain a parallel motion for the rod I; and at
H, there is a stuffing box within the head, to prevent any leak
about the rods I.
SPECIFICATION in pursuance of the conditions of the Letters
Patent, filed by the said Richard Dudgeon in the Great Seal
Patent Office on the 20th May 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
RICHARD DUDGEON, of New York, in the United States of America,
Machinist, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by
Her Letters Patent, bearing date the Twenty-fifth day of November,
in the year of our Lord One thousand eight hundred and fifty-two,
and in the sixteenth year of Her reign, did, for Herself, Her heirs
and successors, give and grant unto me, the said Richard Dudgeon,
Her special licence that I, the said Richard Dudgeon, my executors,
administrators, and assigns, or such others as I, the said Richard
Dudgeon, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of
Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "RAISING HEAVY WEIGHTS BY MEANS OF A PORTABLE HY-
DRAULIC PRESS," upon the condition (amongst others) that I, the said
Richard Dudgeon, by an instrument in writing under my hand
and seal, should particularly describe and ascertain the nature of
the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.

page_text: NOW KNOW YE, that I, the said Richard Dudgeon, hereby
declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement (that is to say):
My Invention consists of an hydraulic press, which press is a
simple cylinder, of, say from three to five or more inches in dia-
meter (as the power desired to be obtained may require), with an
enlarged head, having an opening for the reception of the lever by
which the piston of the pump is worked. This cylinder, with its
enlargement, contains just as much water or other fluid as is re-
quired to fill the vacancy caused by the rising of the interior shaft
in the act of lifting, and when this is accomplished the water is
returned to its original recess by a valve operated on by the lever
which works the pump. Reference should now be had to the
Drawing annexed to and forming part of this my Specification; and
it will be seen that in Figure 1, in such Drawing, A, represents the
head of the ram, made of metal and hollow, so that its capacity,
together with that of the ram (which is also hollow), is equal to
the capacity of the cylinder E. G, is the bottom of the cylinder,
screwed as seen in Figure 2; and F, is the stuffing box on the top
of the cylinder, to steady the ram, and also to be an additional safe-
guard against any leak which might arise from imperfection in the
cylinder E, and is screwed on in the same manner. At B, the force
pump lever C, slips on to work the press, and may be taken off at
pleasure; D, is a small projection upon the head A, through which
a pin passes, which form one of the force pump lever joints, seen in
Figure 2. Figure 2, represents an interior vertical section seen
from the same position as Figure 1. The lever G, is at its lowest
limit, and has come in contact with the small rod C, which at its
lower extremity passes through the valve f, opening it; and the
valve f, coming in contact with the stem of the valve h, in the end
of the ram, opening it, and allowing the water to flow out of the
cylinder through the valve h, by the small holes t, t, into the force
pump, then through the valve f (in the piston of the force pump),

page_text: and
through similar holes g, g, into the space within the ram E, con-
nected with the space in the head represented in this Figure. This
explains the mode of lowering a weight, or lowering the press;
in raising a weight it is only necessary to turn the lever over, when
the small projection V, on the lever C, will not allow it to come far
enough down to strike the rod C, and then every stroke of the force
pump will force a quantity of water into the cylinder by the same
passages as in the case of lowering it was discharged from the
cylinder into the ram; K, is a follower or junk-ring to keep the
packing u, u, against the force pump J, which is fitted into the end
of the rain. On the end of the force pump piston there is a junk-ring
d, to keep the packing against the piston of the force pump. At a,
the pump rod I, is attached to the lever with a joint; and at a, and
D, there are two other joints, which maintain a parallel motion for
the rod I, and at H, there is a stuffing box within the head, to pre-
vent any leak about the rods I.
Having now described the nature of my Invention of "Raising
Heavy Weights by means of a Portable Hydraulic Press," and the
manner in which the same is made, used, or carried into practical
effect, I would here observe, that the press so herein-before de-
scribed is portable, and that I do not confine myself to any size or
dimension; or the parts may vary in their relation to each other,
and not be precisely as shewn in the Drawing hereunto annexed,
but may be larger or smaller, in proportion as experience or circum-
stances may direct or require, without departing in anywise from
the principle of my Invention, which I declare to be, and I clain
an hydraulic jack or hydraulic press (quite portable), in which the
ram is hollow, and serves as the reservoir to supply the cylinder
with water or other liquid, whilst the force pump and its appendages
are contained within the ram, so that by working the said force
pump the ram is forced up, until the liquid in such ram is exhausted,
and by moving the handle of the pump downwards, it will come in
contact with a rod attached to a valve in the pump piston, and the
latter comes in contact with a valve in the end of the ram opening
them both, and allowing the liquid to return into its original recess

page_text: TICT
Drawing.
קח זוז
In witness whereof, I, the said Richard Dudgeon, have here-
unto set my hand and seal, this First day of March, in the
year of our Lord One thousand eight hundred and fifty-three.
RICHARD DUDGEON. (L.S.)
RICHARD DUDGEON. (L.S.)
Taken and declared at the British Consulate, in the City of New
York, this first day of March, 1853, by Richard Dudgeon, to
be his Specification, before me..