IMPROVEMENTS IN PUMPS
Year: 1865

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street, in
the City of London, Patent Agent, for the Invention of "IMPROVEMENTS
- A communication from Jean Pierre Tajan, of Paris,
France.
Sealed the 9th January 1866, and dated the 17th July 1865.
PROVISIONAL SPECIFICATION left by the said Richard Archibald Brooman
at the Office of the Commissioners of Patents, with his Petition, on
the 17th July 1865.
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 "IMPROVEMENTS IN PUMPS," to be as follows:-
This Invention consists in constructing rotary pumps in manner hereafter
explained. The pump is formed of a circular metal box with two branches,
one for the discharge and the other for the suction of the liquid. Two
covers close the box on each side; recesses are made in the inner face of the
covers to receive two discs. In the centre of the box there is a cylindrical
boss, the length of which is equal to the breadth of the box, but its radius is
only about two-thirds of the opening of the box. Two perpendicular apertures

page_text: are made through the boss, in which two blades or pistons are free to slide.;
the length of these pistons is equal to the radius of the box and that of the
boss. Upon one quarter of its circumference the boss is tangent to a curved
plate, one of the ends of which is cut at right angles, while the other
diminishes gradually in thickness in a curvilinear form. The curved plate
fills entirely one quarter and partly another quarter of the space existing
between the boss and the inner surface of the box. Liquid enters at the end of
the curved plate cut at right angles, which intercepts its passage and compels
it to run round the boss and travel through the empty part of the box.
The exit of the water takes place through a channel, into which an orifice
made in the hollowed and diminishing part of the curved plate opens. The
liquid in running round the boss in the box meets the end of the pistons, and
its passage is intercepted by one of them for a quarter of the circumference of
the box; but the boss, rotated by means of a crank handle or otherwise
causes a partial vacuum in the suction pipe, draws in the water, and forces it
out through the exit channel. The pistons, as they reach successively the fixed
part of the curved plate, are pushed on one end into the boss, and out at the
other end to continue the effects above described. The alternate and suc-
cessive to-and-fro motions of the pistons, which take place by the rotation of
the boss, draw in and force out the liquid in a continuous jet.
1871
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 16th January 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of London, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventeenth day of July, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-ninth 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
Richard Archibald Brooman, my executors, administrators, and assigns, or
such others as I, the said Richard Archibald Brooman, 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

page_text: the United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for." IMPROVEMENTS IN PUMPS," communicated
to me by Pierre Tajan, of Paris, France, upon the condition (amongst
others) that I, the said Richard Archibald Brooman, my executors or
administrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the naturo
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:-
This Invention consists in constructing rotary pumps in the manner
hereafter explained. The pump is formed of a circular metal box with two
branches, one for the discharge, and the other for the suction of the liquid.
Two covers close the box on each side; recesses are made on the inner face
of the covers to receive two disks. In the centre of the box there is a cylin-
drical boss, the length of which is equal to the breadth of the box, but its
radius is only about two-thirds of the opening of the box. Two perpendicular
apertures are made through the boss, in which two blades or pistons are free
to slide; the length of these pistons is equal to the radius of the box and that
of the boss. Upon one quarter of its circumference the boss is tangent to a
curved plate, one of the ends of which is cut at right angles, while the other
diminishes gradually in thickness in a curvilinear form. The curved plate fills
entirely one quarter and partly another quarter of the space existing between
the boss and the inner surface of the box. Liquid enters at the end of the
curved plate cut at right angles, which intercepts its passage and compels it to
run round the boss and travel through the empty part of the box. The exit
of the water takes place through a channel, into which an orifice made in the
hollowed and diminishing part of the curved plate opens. The liquid. in
running round the boss in the box meets the end of the pistons, and its
passage is intercepted by one of them for a quarter of the circumference of
the box, but the boss rotated by means of a crank handle or otherwise causes
a partial vacuum in the suction pipe, draws in the water, and forces it out
through the exit channel. The pistons, as they reach successively the fixed
part of the curved plate, are pushed on one end into the boss and out at the
other end to continue the effects above described. The alternate and suc-

page_text: cessive to-and-fro motions of the pistons, which take place by the rotation of
the boss, draw in and force out the liquid in a continuous jet.
The accompanying Drawing represents two sections of the improved pump.
In both these Figures A is the box; B, the discharge branch; B¹, the suction
branch; C, C, disks; D, the cylindrical boss; E, E¹, openings in said boss;
F, the curved plate; G, channel; H, H³, blades; K, fly wheel with crank
handle.
Having thus described the nature of the said Invention, and in what
manner the same is to be performed, I claim the combination of a circular
box with a cylindrical inside boss turned by any suitable power.
In witness whereof, I, the said Richard Archibald Brooman, have here-
unto set my hand and seal, this Fifteenth day of January, in the year
of our Lord One thousand eight hundred and sixty-six.
R. A. BROOMAN. (L.S.)