A POWER ACCUMULATOR, OR APPARATUS TO BE EMPLOYED WITH HYDRAULIC PRESSES
Year: 1855

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street,
in the City of London, Patent Agent, for the Invention of "A POWER
ACCUMULATOR, OR APPARATUS TO BE EMPLOYED WITH HYDRAULIC PRESSES.-
A communication from Jean Baptiste Falguiere, of Marseilles.
Sealed the 17th July 1855, and dated the 25th January 1855.
PROVISIONAL SPECIFICATION left by the said Richard Archibald Brooman
at the Office of the Commissioners of Patents, with his Petition, on the
25th January 1855.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention
for "A POWER ACCUMULATOR, OR APPARATUS TO BE. EMPLOYED WITH HYDRAULIC
PRESSES," (communicated to me by Jean Baptiste Falguiére, of Marseilles),
to be as follows:-
This apparatus consists of two hollow and separate cylinders, in each of
which a piston is free to move, each of which is loaded with a weight propor-
tioned. to the power to be obtained from each of them. One or other of these
cylinders is placed at will in communication with the hydraulic press, to be
worked by means of pipes and cocks. That one in which there is the least

page_text: pressure serves to commence the pressing operation, while the other carries
the pressure to the maximum, and terminates the operation. A sufficiently
powerful pump injects water under the pistons, and keeps them raised.
In the first part of the operation, the matters to be pressed offering but
slight resistance, it will be found advantageous to work the less powerful
cylinder, as the cock which puts it in communication with the press allows the
water to flow in a sufficient body at a time, and thus the work is accelerated.
When the resistance offered by the matters under pressure becomes too great,
communication is cut off with the first cylinder and opened up with the second,
which finishes-the pressure...
The pressure exerted in the press is proportional to the difference between
the surface of the piston of the press and the surfaces of each of the pistons
of the apparatus; thus, if the surface of the bottom of the piston of the press
is six times greater than that of the pistons of the apparatus, the pressure
exerted in the first part of the operation will be six times greater than that in
the first cylinder, and that exerted at the end of the operation will be ten times
greater than that in the second cylinder.
In order to make one apparatus supply several presses, it is necessary that
the pump or pumps should amply supply the water necessary to work the
presses. The number of presses, and the number of times they are worked in
a given time once ascertained, it will be easy to calculate the quantity of water
for their supply, when the dimensions to be given to the injection pump
or pumps can be regulated accordingly. This apparatus, or power accu-
mulator, is applicable to hydraulic presses for whatever purpose they may be
employed.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent
Office on the 24th July 1855.
1:
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of London, Patent 3
Agent, send greeting.
WHEREAS. Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of January, in the year of our Lord
One thousand eight hundred and fifty-five, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me;
the said Richard Archibald Brooman, Her special. licence that I, the said

page_text: Richard Archibald Brooman, my executors, administrators, and assignis, or
such others as I, the said Richard Archibald Brooman, my executors, admi-
nistrators, 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 "A POWER ACCUMULATOR, OR APPARATUS TO BE EMPLOYED
WITH HYDRAULIC PRESSES," communicated to me by Jean Baptiste Falguiere,
of Marseille, upon the condition (amongst others) that I, the said Richard
Archibald Brooman, 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.
NOW KNOW YE, that I, the said Richard Archibald Brooman, do hereby
declare the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement thereof, reference being had to the Drawings hereunto
annexed, that is to say:-
This apparatus consists of two hollow and separate cylinders, in each of
which a piston is free to move, each of which is loaded with a weight propor-
tioned to the power to be obtained from each of them. One or other of these
cylinders is placed at will in communication with the hydraulic press to be
worked by means of pipes and cocks. That one in which there is the least
pressure serves to commence the pressing operation, while the other carries
the pressure to the maximum, and terminates the operation. A sufficiently
powerful pump injects water under the pistons, and keeps them raised.
In the first part of the operation, the matters to be pressed offering but
slight resistance, it will be found advantageous to work the less powerful
cylinder, as the cock which puts it in communication with the press allows the
water to flow in a sufficient body at a time, and thus the work is accelerated.
When the resistance offered by the matters under pressure becomes too great,
communication is cut off with the first cylinder and opened up with the second,
which finishes the pressure. The pressure exerted in the press is proportional
to the difference between the surface of the piston of the press and the surfaces
of each of the pistons of the apparatus. Thus, if the surface of the bottom
of the piston of the press is six times greater than that of the pistons of the
apparatus, the pressure exerted in the first part of the operation will be six
times greater than that in the first cylinder, and that exerted at the end of the

page_text: operation will be ten times greater than that in the second cylinder. In order
to make one apparatus supply several presses, it is necessary that the pump or
pumps should amply supply the water necessary to work the presses. The
number of presses, and the number of times they are worked in a given time
once ascertained, it will be easy to calculate the quantity of water for their.
supply, when the dimensions to be given to the injection pump or pumps can
be regulated accordingly. This apparatus, or power accumulater, is applicable
to hydraulic presses for whatever purpose they may be employed.
The annexed Drawings represent the manner in which the power accumu-
lator is constructed and employed with hydraulic presses. Figure 1 is a longi-
tudinal section of a hydraulic press; Figure 2 is a longitudinal élevation of the
same; Figure 3 is a vertical section of the power accumulator; and Figure 4
is a vertical section of the tank and pumps; Figure 5 is a plan of the press;
Figure 6 is a horizontal section of the power accumulator; and Figure 7 is a
horizontal section of the pumps, and a plan of the tank. The pumps n, n, n', n',
lift the water from the tank B through the pipe b. The water having been
raised by the pumps, the valves s close, and the valves s¹ open, and the water
is driven through the pipes t, t¹, into the hollow cylinders h, h, of the power
accumulator, in which the weighted pistons 7, 9', maintain a constant pressure.
By opening the taps z, z¹, the press is put in communication with one or
other of the cylinders h, h'. If it should happen that the pumps have been
kept too long at work, so as to supply a greater quantity of water than is
required, the pistons of the power accumulator will rise, and their weights Q
come in contact with the counterweights P, and lift them up; the weights p, p',
will then drop, and the rods y, being acted on by the levers L, L', will be raised,
and keep the valves s, s, raised, so that the pumps (although still at work) will
supply no more water to the power accumulator, and consequently no derange-
ment in its action will be produced. If by some unforeseen circumstance the
weights p, p, do not act, the pistons will rise from o to o', and then the water
will gush out, and any derangement of the action of the apparatus will be
avoided. When the least powerful cylinder of the power accumulator has
done its share of the work, the cock should be closed, and the cock 2, which
communicates with the more powerful cylinder, should be opened. If this
should be accidentally forgotten, the pressure of the cylinder h will be trans-
mitted through the tube t" to the cylinder h', and the piston in that cylinder,
being pressed with greater force, will rise to o¹, and the water will gush out.
To avoid this, a valve m is employed, which will close, in this instance, and
shut off the communication between the two cylinders.
The operation being terminated in the press, the cocks z, ¹, are shut, and

page_text: the cock r opened, and the water will then flow back through the pipe r', T,
into the tank, to be again raised by the pumps.
And having now described the nature of the said Invention, and the
manner in which the same is to be performed, I declare that I claim, as
constituting the said Invention, the construction of a power accumulator, or
apparatus to be employed with hydraulic presses, in the manner represented in
the Drawings hereunto annexed, and herein-before described.
In witness whereof, I, the said Richard Archibald Brooman, have here-
unto set my hand and seal, this Twenty-fourth day of July, One
thousand eight hundred and fifty-five.