IMPROVE- MENTS IN THE CONSTRUCTION OF ROTARY PUMPS
Year: 1864

page_text: LETTERS PATENT to Edward Myers, of Millbank Row, Westminster, in
the County of Middlesex, Civil Engineer, for the Invention of "IMPROVE-
MENTS IN THE CONSTRUCTION OF ROTARY PUMPS."
PROVISIONAL SPECIFICATION left by the said Edward Myers at the
Office of the Commissioners of Patents, with his Petition, on the 2nd
June 1864.
I, EDWARD MYERS, of Millbank Row, Westminster, in the County of
Middlesex, Civil Engineer, do hereby declare the nature of the Invention
for "IMPROVEMENTS IN THE CONSTRUCTION OF ROTARY PUMPS," to be as follows:-
This Invention relates, first, to the construction of rotary pumps where two
toothed drums or wheels are employed revolving in a case or chamber with
inlet and outlet passages, the principle of which is now well known and
practised; and one of my improvements in this class of rotary pumps consists
in leaving one of the toothed drums or wheels free upon its axis,, which axis
is a fixture in its bearings, the toothed drum upon it being caused to revolve
by its teeth gearing with the teeth of the drum which is driven, and with
which it is arranged to work as a rotary pump. The toothed drums may be
placed one above the other, so that the drum which is free to revolve on its
axis may be arranged to fall into gear with and rest upon the surface of the
drum below, to which rotary motion is communicated.

page_text: Another of my improvements in this description of rotary pumps consists in
forming the surface or circumference of the rotating drums or wheels with
hollows or recesses, which as they revolve are open to receive the fluid to be
raised, and after discharging their contents such hollows are closed with
suitable valves, pistons, or filling pieces at the point where the circumference
of the two drums approach each other in order to prevent the return of the
fluid thus raised and discharged.
Another of my improvements consists in making the outer circumference
of the rotating drums or wheels employed for raising and. discharging fluids of
vulcanized india-rubber or other suitable elastic material, so that compression
may take place where the surfaces of the two drums meet in rotating
together, by which means a tight joint is formed to prevent the return of the
fluid raised, at the same time grit or other impurities will be readily allowed
to pass with the fluid owing to the elasticity of the surface of the rotating
drums. In some cases I form the drums with circular grooves and raised
rings around their circumference which fit into each other at the point where
the drums come into contact during their rotation in the case or chamber in
which they are mounted.
Another of my improvements in rotary pumps of this character, consists in
placing dividing plates or surfaces in the inlet and outlet passages of such
pumps to direct the course of the currents entering and being discharged from
the case or chamber in which the drums revolve.*
The second part of my Invention consists in constructing rotary pumps by
the combination of two archimedean screws or spirals mounted on axes, which
revolve, by preference, in tubes contained in or forming part of a case or
chamber having suitable inlet and outlet or discharge passages. One of the
axes of the screws or spirals passes through a stuffing box in the case; or
chamber, and motion is communicated thereto by steam or other motive.
power, the two axes of the screws or spirals being geared together within or
exterior of the case or chamber as may be found most convenient.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
1.
by the said Edward Myers in the Great Seal Patent Office on the
2nd December 1864.
i
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
MYERS, of Millbank Row, Westminster, in the County of Middlesex, Civil. 8
Engineer, send greeting.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of June; in the year of our Lord One
thousand eight hundred and sixty-four, in the twenty-seventh year of Iler
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Edward Myers, Her special licence that I, the said Edward
Myers, my executors, administrators, and assigns, or such others as I, the
said Edward Myers, 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 "IMPROVE-
MENTS IN THE CONSTRUCTION OF ROTARY PUMPS," upon the condition (amongst
others) that I, the said Edward Myers, 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 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 Edward Myers, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say:-
:.
This Invention relates, first, to the construction of rotary pumps where two
toothed drums or wheels are employed revolving in a case or chamber with
inlet and outlet passages, the principle of which is now well known and
practised; and one of my improvements in this class of rotary pumps consists
in leaving one of the toothed drums or wheels free upon its axis, which axis
is a fixture in its bearings, the toothed drum upon it being caused to revolve
by its teeth gearing with the teeth of the drum which is driven, and with
which it is arranged to work as a rotary pump. The toothed drums may be
placed one above the other so that the drum which is free to revolve on its
axis may be arranged to fall into gear with and rest upon the surface of the
drum below, to which rotary motion is communicated.
Another of my improvements in this description of rotary pumps consists
in forming the surface or circumference of the rotating drums or wheels with
hollows or recesses, which as they revolve are open to receive the fluid to be
raised, and after discharging their contents such hollows are closed with
suitable valves, pistons, or filling pieces at the point where the circumference

page_text: of the two drums approach each other in order to prevent the return of the
fluid thus raised and discharged.
Another of my improvements consists in making the outer circumference of
the rotating drums or wheels employed for raising and discharging fluids of
vulcanized india-rubber or other suitable elastic material, so that compression
may take place where the surfaces of the two drums meet in rotating
together, by which means a tight joint is formed to prevent the return of the
fluid raised, at the same time grit or other impurities will be readily allowed,
to pass with the fluid owing to the elasticity of the surface of the rotating:
drums. In some cases I form the drums with circular grooves and raised
rings around their circumference which fit into each other at the point where
the drums come into contact during their rotation in the case or chamber in
which they are mounted.
Another of my improvements in rotary pumps of this character consists in
placing dividing plates or surfaces in the inlet and outlet passages of such
pumps to direct the course of the currents entering and being discharged from
the case or chamber in which the drums revolve.
The second part of my Invention consists in constructing rotary pumps by
the combination of two archimedean screws or spirals mounted on axes which
revolve, by preference, in tubes contained in or forming part of a case or
chamber having suitable inlet and outlet or discharge passages. One of the
axes of the screws or spirals passes through a stuffing box in the case or
chamber, and motion is communicated thereto by steam or other motive power,
the two axes of the screws or spirals being geared together within or exterior of
the case or chamber as may be found most convenient.
And in order that my Invention may be most fully understood and
readily carried into effect, I will proceed to describe the Drawings hereunto
annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1, Sheet 1, shows an end elevation of a rotary pump constructed
and arranged according to the first part of the improvements, the end cover
of the case or chamber being removed; Figure 2 is an end elevation;
Figure 3, a longitudinal section, and Figure 4 a plan of the same.
A and B are the two toothed drums or wheels geared together so as to
saules nenese & within the case on whombox. C the form and construction.

page_text: and receives motion by means of a toothed wheel or pulley fixed thereon
driven by a steam engine or other motive power. The upper toothed drum
or cylinder A is free to revolve on its axis a which is fixed in its bearings, and
the toothed drum A is so arranged that when stationary its teeth rest in the
grooves or hollows between the teeth of the drum B, which when driven com-
municates its motion to the drum A. The toothed drums or cylinders being
thus aranged to work, a very perfect joint is formed where the teeth of the
two drums meet or gear together to prevent the return of the water or other
fluid in its passage through the pump. D is the inlet and E the outlet
passage. Dividing plates or surfaces may be placed or arranged. within the
inlet and outlet passages to direct the course of the currents entering into and
being discharged from the case or chamber C.
I will now describe the second part of any improvements in the construction
of rotary pumps, in which two archimedian screws or spirals are arranged to
work together for the purpose of raising or forcing water or other fluid.
Figure 1, Sheet 2, shows an end elevation; Figure 2, a transverse section;
Figure 3, a plan; and Figure 4, a plan in section of a rotary pump constructed
according to this part of my Invention.
A, B, are two archimedian screws or spirals keyed fast or mounted upon
the axes a, b, with which they revolve in the tubular parts a', 6', of the case
or chamber C. The axes a, b, are supported and revolve in bearings a¹, b³,
at one end of the case or chamber C, and pass through stuffing boxes a³, b³, at
the other end into the chamber C', where the two axes are geared together by
the two toothed wheels A', B'. The axis a passes through the end cover C²
of the case or chamber C, motion being communicated to the axis a by means
of a drum or pulley a fixed thereon, or by other suitable mechanical means.
D is the inlet and E the outlet passage for the water or other fluid raised or
forced through the case or chamber C by the revolution of the two combined
archimedian screws or spirals A, B, the construction, arrangement, and mode
of imparting motion to which may be varied if desired.
Having thus described the nature of my improvements in the construction
of rotary pumps, I would have it understood that I do not confine myself to
the exact details herein shown and described, as the same may be greatly
varied without departing from the true character of my Invention; at the same
time I would remark, that I do not claim broadly the construction of rotary
pumps with two toothed drums or wheels, except so far as my present
improvements herein described are applicable thereto, nor do I claim the
construction of rotary pumps where one archimedian screw only is employed,

page_text: this part of my Invention consisting in the arrangement and combination of
two archimedian screws or spirals revolving in a case or chamber so as to act
as a rotary pump in the manner herein described.
In witness whereof, I, the said Edward Myers, have hereunto set my
band and seal, this Eighteenth day of November, in the year of our
Lord One thousand eight hundred and sixty-four.
EDWARD MYERS. (L.S.)