IMPROVED APPARATUS FOR PUMPING FLUIDS
Year: 1867

page_text: LETTERS PATENT to William Bradshaw Leachman and John Holroyd,
both of Leeds, in the County of York, for the Invention of "IMPROVED
APPARATUS FOR PUMPING FLUIDS."
PROVISIONAL SPECIFICATION left by the said William Bradshaw Leach-
man and John Holroyd at the Office of the Commissioners of Patents,
with their Petition, on the 14th August 1867.
We,. WILLIAM BRADSHAW LEACHMAN and JOHN HOLROYD, both of Leeds, in
the County of York, do hereby declare the nature of the said Invention for
"IMPROVED APPARATUS FOR PUMPING FLUIDS," to be as follows:-
The object of our Invention is to pump: fluids, whether in a liquid or
gaseous state, and for this purpose within a suitable chamber. furnished with
orifices at the bottom and the top for injection and ejection we place a
cylinder capable of revolving, upon a shaft which passes transversely through,
and is secured to the chamber, such cylinder being provided with bearings on
the outsides of the chamber through which it passes. The cylinder is so
arranged as closely to fit the chamber (which is of a cylindrical formation in

page_text: its side elevation) in one portion, whilst it is a considerable distance from it
on the opposite side. Upon the shaft. and within the cylinder we key a
grooved eccentric. or cain, in which at.equal distances apart friction rollers are
placed connected with vanes or floats free to slide within grooves cut in the
periphery of the cylinder, such vanes or floats always being in close contact
with the inner surface of the chamber.
The action of the apparatus is as follows:-The cylinder being set in
motion by means of belting or other motive power operating upon one of the
projecting ends forming its bearings, the fluid rises. up into the vacuum space
between the chamber and the cylinder, and is urged forward-by-the action of
the vanes or floats through the ejection orifice, the eccentric being so placed
with its projecting part nearest to the vacuum portion of the chamber as to
cause the vanes or floats to extend across the space between the cylinder and
the chamber in that part, whilst it also permits them to recede nearer to the
shaft as they approach the portion where the cylinder fits the chamber, and
are again urged out in each successive revolution. By this arrangement
water or other liquids may be pumped, or gases may be pumped for the
purpose of compression.
SPECIFICATION in pursuance of the conditions of the Letters, Patent, filed
by the said William Bradshaw Leachman and John Holroyd in the Great
Seal Patent Office on the 12th February 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME,, we, WILLIAM
BRADSHAW LEACHMAN and JOHN HOLROYD, both of Leeds, in the County of
York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters.
Patent, bearing date the Fourteenth day of August, in the year of our Lord
One thousand eight hundred and sixty-seven, in 'the 'thirty-first 'year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said William Bradshaw Leachman and John Holroyd, Her special licence
that we, the said William Bradshaw Leachman and John Holroyd, our execu-
tors, administrators, and assigns, or such others as we, 'the said 'William
Bradshaw Leachman and John Holroyd, our '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 night make, use, exercise, and vend, within the United Kingdom of

page_text: Great Britain and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVED APPARATUS FOR PUMPING FLUIDS," upon the condition (amongst
others), that we, thei said William. Bradshaw Leachman, and John, Holroyd,
our executors, or administrators,, by. an instrument. in writing under, our, or
their, hands and seals, or under the hand and seal of one of us or them, 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 imme
diately after the date of the said, Letters Patent..
NOW KNOW YE, that we, the said William Bradshaw Leachman and John
Holroyd, do hereby declare the nature of the said: Invention, and in what
manner the same is-to be performed, to be, particularly, described and.ascer-
tained in and by the following statement. thereof, that is to say:
The object, of our Invention, is to, pump fluids, whether in, a liquid or
gaseous state, and for, this, purpose, within. a. suitable. chamber furnished. with
orifices at the bottom. and. the top. for. injection, and ejection we place. a
cylinder capable, of, revolving, upon. a.shaft, which passes, transversely through,.
and is secured to the chamber,, such, cylinder, being provided with bearings.on
the, outsides of the chamber through which it passes.. The. cylinder. is: so
arranged as closely, to fit, the, chamber (which.is: of a cylindrical.formation. in.
its side. elevation) in one portion, whilst it is a.considerable distance from it
on the opposite. side. Upon. the shaft and within. the cylinder, we, key a
grooved eccentric or cam, in which at equal, distances. apart friction rollers.are.
placed connected with. vanes or floats free to slide within grooves, cut in, the
periphery, of the cylinder,,such vanes. or floats always being, in, close contact
with the inner surface of the chamber.
A. modified.and.preferred arrangement consists in forming, upon the inside
of one end of the outer chamber. two, rings concentric with it and with each
other.. A. holeris, bored; through, the inner ring (which is solid), eccentrically
with it; and consequently with the outer one and the chamber itself.. A shaft
is passed through the hole, and through the loose cover or end of the chamber,
and upon it and within the chamber is, keyed a cylinder fitted at intervals
upon its periphery, with three or more vanes or floats free to project beyond
its surface,, and. connected to bars, sliding in grooves within the cylinder, such.
bars being connected with, small segments which work in the space between
the rings formed upon the inner side of the end of the chamber, the cylinder
being in an eccentric position to the chamber, and being, so arranged that its
Heriphery, touches one point of the inner circumference of the chamber.. A

page_text: space is left-between the two on the opposite side, through which the fluid
passes on the apparatus being put in motion from the port of admission to
that of exit, being forced by the floats or vanes, which latter in turn are
urged out and drawn in by means of the eccentric arrangement before
referred to. 1
In order however that our Invention may be the better understood reference
is made to the accompanying Sheet of Drawings (which illustrates our pre-
ferred arrangement), and to the letters and figures marked thereon, similar
letters representing similar parts, that is to say :-
:
DESCRIPTION OF DRAWINGS.
Figure 1 is a vertical section of our pump, and Figure 2 an end elevation,
showing internal portions in dotted line.
A is a cylindrical chamber provided with an inlet port a and outlet port a¹,
and with a removable cover a secured by bolts and nuts, as shown, to the
chamber A; letters b, b, and c, c, indicate the bearings and the glands re-
spectively by which the shaft d is supported in conjunction with the carrying
bearer bracket e; B is a pulley through which motion is imparted to.the
shaft & upon which is keyed the cylinder C; D is a disc, and E an annular
ring formed or cast upon the inner side of the end of the chamber A; letters of
indicate bars free to slide in grooves cut in the periphery of the cylinder C;
to the outer ends of such bars are connected vanes or floats g of the same
width as the cylinder, that is, the inside breadth of the chamber A, and like
the bars free to move in slits cut across the periphery of the cylinder C;
letters h indicate the segments before referred to, each connected by a swivel
pin to the bars f, which also slide in grooves (seen in dotted line in Figure 2)
in the web of the cylinder C; F is the groove or space between the rings D
and E, within which the segments h slide. The piece i is a removable V slip
of metal inserted in one side of the chamber A, against which the revolving
cylinder C is caused to rub instead of against the chamber itself, Motion
being imparted to the cylinder C the bars f and floats G are carried with it,
and by means of the segments h working in the groove F and the eccentric
motion referred to are alternately urged inwards and outwards, the former
motion taking place when descending to the inlet a; and the latter when
ascending and carrying or forcing the fluid through the outlet a¹.
Having now fully ascertained the nature of our Invention, and in what
manner the same may be performed, we wish it to be understood that what
we claim is, the pumping of fluids, liquid or gaseous, by means and apparatus

page_text: arranged essentially like that shown and described, without confining ourselves
to the precise details shown.
In witness whereof, we, the said William Bradshaw Leachman and John
Holroyd, have hereunto set our bands and seals, this Sixth day of
February, in the year of our Lord One thousand eight hundred and
sixty-eight.
Witness,
WILLIAM BRADSHAW LEACHMAN. (L.s.)
JOHN HOLROYD.
PHILIP H. SHARP,
Patent Agent,
(L.S.)
Leeds, East Parade.
Bradford, Exchange Passage.