IMPROVEMENTS IN STEAM AND WATER ROTATORY ENGINES. APPLICABLE ALSO FOR PUMPING PURPOSES.”
Year: 1872

page_text: LETTERS PATENT to James Fielding, of Elm Park, near Liverpool,
Gentleman, for the Invention of "IMPROVEMENTS IN STEAM AND
WATER ROTATORY ENGINES. APPLICABLE ALSO FOR PUMPING PURPOSES.”
PROVISIONAL SPECIFICATION left by the said James Fielding at the
Office of the Commissioners of Patents, with his Petition, on the
˚, 1st May 1872.
•
I, JAMES FIELDING, of Elm Park, near Liverpool, Gentleman, do
hereby declare the nature of the said Invention, for, "IMPROVEMENTS IN
STHAM AND WATER ROTATORY ENGINES, APPLICABLE ALSO FOR PUMPING PURPOSES,"
to be as follows:—
•
In my improved engine and pump there is a cylindrical or partly
cylindrical casing divided into two compartments by a rotating cam or
excentric, bearing upon which is a clack which prevents the induction
passage from communicating with the eduction passage, but by turning
upon a centre rises so as to allow the cam or excentric to pass; or in
place of this clack I adapt a sliding partition moving in a groove. These
parts may be kept in contact with the cam or excentric by their own
-

page_text: weight or by other ordinary weights or springs, but I propose to admit
the steam or water pressure thereto for that purpose.
The packing of the parts which move'in contact may (if packing be
adopted) be of any ordinary character, but I propose to form on the
rotating cam or excentric projecting rings situate within similarly formed,
grooves in the casing, and a similar plan may be adapted to the clack or
slide.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Fielding in the Great Seal Patent Office on
the 1st November 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
FIELDING, of Elm Park, near Liverpool, Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of May, in the year of
our Lord One thousand eight hundred and seventy-two, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said James Fielding, Her special
license that I, the said James Fielding, my executors, administrators,
and assigns, or such others as I, the said James Fielding, 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 STEAM AND
WATER ROTATORY ENGINES, APPLICABLE ALSO FOR PUMPING PURPOSES," upon the
condition, amongst others, that I, the said James Fielding, by an instru-
ment 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said James Fielding, do hereby declare
the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and

page_text: by the following statement and accompanying Drawings, that is to
say:-
c
In the accompanying Drawings Fig. 1 represents my Invention in
vertical section, Fig. 2 is a cross section, and Fig. 3 a plain view.
.
At a is a side plate of what may be called the cylinder of the engine,
and at 6 another plate provided with a flange c, by means of which these
two these two part are bolted together, thus leaving a space d, dª,
between them. Within this space and working against the surfaces of the
plates a, b, is a cam' e, constituting the piston of the engine, its radii ſ, ƒ,
corresponding to the circumference 9. This cam is mounted on a shaft h,
which runs in bearings formed in the plates a, b, and by it the motive
power is transmitted. At i is a clack hinged to the cover k and to the
sides a, b, of the cylinder at 1, and resting at its other end upon the
cam e, and by these means the said cylinder is divided into two com-
partments represented by d, dª. In the cover k is an induction
opening m, and at n an eduction opening. Steam or other elastic fluid
or water under pressure being admitted through the opening m acts
upon the came and forces it round, the eduction steam or water which
is in the chamber d* passing out by the opening n, the induction steam
or water being prevented from passing thereto by the clacki, which
constitutes a partition. As the cam e revolves in the direction of the
arrow, it lifts tlie clack i upon its centre of motion 7, which still however
keeps in contact therewith, and when the part ƒ* passes it the surface.e❤
becomes acted upon by the fluid pressure, and thus rotatory motion is
continued. To the cam e I adapt rings of metal o, which are situate
in grooves formed in the plates a, b, and these constitute a packing to
prevent the passage of induction steam or water.
In order to secure the contact of the clack / with the cam e I form a
way from the induction passage m to the space p, and through this the
steam or water may be allowed to flow at pleasure by opening or closing
a tap 9, or in place of this arrangement a spring may be employed or
a cam may be placed upon the shaft h, acting upon a lever projecting
from the centre of motion l.
Fig. 4 represents another method of constructing the clack, whereby
it may be packed at its end, which rests upon the cam e, and at the
sides which bear against the plate a, b. In this instance the clack is
formed in two parts i, i*, the former of which may be considered as that

page_text: before referred to, but between it and the part is is interposed hemp or
other suitable packing p compressed by means of set screws 8, and thus
caused to bear against the aforesaid surfaces.
I have above alluded to my Invention as a motive power engine to be
used with steam or water, but is also applicable as a pump, the only 5
difference being, as will be evident, that the shaft h must be driven by
motive power.
Having this described and ascertained the nature of my said Inven-
tion, and the manner in which the same is to be performed, I desire
it to be understood that I claim as secured to me under the above in 1
part recited Letters Patent, the rotatory engine and pump, substantially
as described and illustrated by the accompanying Drawings.
ɔ
In witness whereof, I, the said James Fielding, have hereunto set
my hand and seal, this Thirty-first day of October, in the year
of our Lord One thousand eight hundred and seventy-two.
1