IMPROVEMENTS IN ROTARY PUMPS
Year: 1867

page_text: LETTERS PATENT to Augustus Lea Bricknell, of Stratford-on-Avon, in
the County of Warwick, for the Invention of "IMPROVEMENTS IN ROTARY
PUMPS."
Sealed the 29th November 1867, and dated the 7th June 1867.
PROVISIONAL SPECIFICATION left by the said Augustus Lea Bricknell
at the Office of the Commissioners of Patents, with his Petition, on the
7th June 1867.
I, AUGUSTUS LEA BRICKNELL, of Stratford-on-Avon, in the County of
Warwick, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN ROTARY PUMPS," to be as follows:-
The Invention has for its object improvements in rotary pumps, and relates
to pumps having a cylindrical chamber in which revolves a cylindrical centre
piece fixed upon a suitable axis, such centre piece being provided with flanges
the peripheries of which fit accurately the bore of the chamber, and also with
sliding pistons which are acted upon by cams at the times desired to enable them
to pass an abutment or partition. And the Invention consists in giving a
tapered sectional form to the annular space enclosed between the two flanges
carried by the rotating cylindrical centre piece. The abutment or partition I
form at the part acting within such tapered annular space of a corresponding
shape, such abutment or partition being formed by preference of gutta percha
or other similar material, and being held in a suitable space formed in the
cylindrical chamber, but capable of being pressed up by springs or otherwise,
or of falling by its own gravity, as wear takes place, so as always accurately

page_text: to fit the tapered annular space in the cylindrical centre piece. The sliding
pistons I cover with leather, gutta percha, india-rubber, or other suitable soft
material, by these means packing such as is ordinarily employed in rotary
pumps is entirely dispensed with. The pump may be employed either as a
force or lift pump, and for deep wells I fix the pump about twenty feet from
the water level, and drive it by a band or chain acted upon at the surface
and passing round suitable pulleys, one of which is fixed to the axis of the
pump, and the other at the top of the well or in other suitable position.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Augustus Lea Bricknell in the Great Seal Patent Office
on the 7th December 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, AUGUSTUS
LEA BRICKNELL, of Stratford-on-Avon, in the County of Warwick, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria by Her Letters
Patent, bearing date the Seventh day of June, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirtieth year of Her
reign, did for Herself, Her heirs, and successors, give and grant unto me, the
said Augustus Lea Bricknell, Her special licence that I, the said Augustus
Lea Bricknell, my executors, administrators, and assigns, or such others
as I, the said Augustus Lea Bricknell, 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
"IMPROVEMENTS IN ROTARY PUMPS," upon the condition (amongst others) that I,
the said Augustus Lea Bricknell, my executors or administrators, by an instru-
ment in writing under my, or their, or one of their hands and seals, 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 iminediately
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Augustus Lea Bricknell, 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, that is to say :-

page_text: The Invention has for its object improvements in rotary pu nps, and relates
to pumps having a cylindrical chamber in which revolves a cylindrical centre
piece fixed upon a suitable axis, such centre piece being provided with flanges,
the peripheries of which fit accurately the bore of the chamber, and also with
sliding pistons, which are acted upon by cams at the times desired. to enable
them to pass an abutment or partition; and the Invention consists in giving a
tapered sectional form to the annular space enclosed between the two flanges
carried by the rotating cylindrical centre piece. The abutment or partition
I form at the part acting within such tapered annular space of a corresponding
shape, such abutment or partition being formed by preference of gutta percba
or other similar material, and being held in a suitable space formed in the
cylindrical chamber, but capable of being pressed up by springs or otherwise,
or of falling by its own gravity as wear takes place, so as always accurately to
fit the tapered annular space in the cylindrical centre piece, the sliding pistons
I cover with leather, gutta percha, india-rubber, or other suitable soft
material.
And in order that any Invention may be more fully understood and readily
carried into effect I will proceed, aided by the accompanying Drawings, more
fally, to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side view with one of the side cheeks removed, and Figure 2
is a cross section of a rotary pump constructed according to my Invention.
a, a, is the body of the pump, and b, b, is a cylindrical centre piece which
is fixed to the axis c, such centre piece b being provided with flanges b', the
peripheries of which fit accurately the bore of the chamber formed in the body
of the pump; d, d, are sliding pistons, having rollers or trucks d¹ connected
thereto as shown, which are acted upon by cams e, e, forined one in each
check a¹, a', of the body of the pump in order that the pistons d, d, may at
the times desired be enabled to pass the abutment or partition f. And according
to my Invention I give a tapered sectional form to the annular space enclosed
between the two flanges b', b', as shewn more clearly by Fig. 5. The abut-
ment or partition f is held in a space or chamber formed in the body of the
pump, and at the part acting within the tapered annular space between the
two flanges b', b', it is made of a taper form to fit such annular space, and if
desired such abutment or partition f may be pressed up by springs or other-
wise, or it may in some cases be allowed to fall by its own gravity as wear
takes place. The sliding pistons d, d, I cover with leather, gutta percha,
vulcanized india-rubber, or other suitable soft material.. By the employment of

page_text: a tapered form to the annular space between the two flanges b₁, 61, the abutment
or partition as wear takes place will continue accurately to fit such tapered
annular space, and I construct the abutment or partition f of gutta percha or
other similar material, which by preference is moulded to the form desired.
Figure 3 shows a separate view of one of the sliding pistons d with a
covering d of leather applied thereto, which is sewn tightly thereon, but when
employing gutta percha or other similar material as a covering to the sliding
pistons d I mould such covering thereon, as will be well understood.
Fig. 4 shows one form of sliding piston d when employing a covering of
gutta percha. By these means packing such as is ordinarily employed in
rotary pumps is entirely dispensed with; the pump may be employed either
as a force or lift pump and for deep wells. I fix the pump about 20 feet
from the water level, and drive it by a band or chain, acted upon at the
surface, and passing round suitable pulleys, one of which is fixed to the axis
of the pump, and the other at the top of the well, or in other suitable position.
Having thus described the nature of my said Invention, and the mode in
which I carry the same into effect, I would have it understood that what I
claim is,
First, the giving a tapered sectional form to the annular space enclosed
between the flanges 6, 61, the abutment or partition f being at the part acting
within such tapered space made of a corresponding form.
Secondly, I claim the covering of the sliding pistons d, d, with leather,
gutta percha, vulcanized india-rubber, or other suitable soft material.
And, thirdly, I claim the forming the abutment or partition f of gutta
percha or other similar material.
In witness whereof, I, the said Augustus Lea Bricknell, have hereunto
set my hand and seal, this Sixth day of December, in the year of our
Lord One thousand eight hundred and sixty-seven.
Witness,
B. J. B. MILLS,
Patent Agent,
35, Southampton Buildings,
Chancery Lane,
London.
A. L. BRICKNELL. (L.S.)