Im- PROVEMENTS IN BLOWING ENGINES AND IN VALVES FOR THE SAME, AND APPLICABLE OTHERWISE.
Year: 1870

page_text: LETTERS PATENT to William Hargreaves and William Inglis, both
"
of Bolton, in the County of Lancaster, for the Invention of "Im-
PROVEMENTS IN BLOWING ENGINES AND IN VALVES FOR THE SAME, AND
APPLICABLE OTHERWISE.
"
PROVISIONAL SPECIFICATION left by the said William Hargreaves
and William Inglis at the Office of the Commissioners of Patents,
with their Petition, on the 3rd December 1870.
We, WILLIAM HARGREAVES and WILLIAM INGLIS, both of Bolton,
in the County of Lancaster, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN BLOWING ENGINES AND IN VALVES FOR THE
SAME, AND APPLICABLE OTHERWISE," to be as follows, that is to say:-
This Invention has for its objects increased simplicity of construction,
convenience for inspection and repairs, and durability, and it consists in
the first place in combining together two vertical blowing cylinders, the
pistons of which are actuated directly by steam cylinders placed im-
mediately above or below them, with two peculiar valve chambers placed

page_text: between and connecting the said blowing cylinders. One of the valve.
chambers is formed with separate sets of inlets and valves at its under
side for admitting air to the bottoms of the cylinders, whilst the air
from the bottoms of the cylinders passes through valves above the inlet
valves into a space in the middle and upper part of the chamber, and
The other
thence by a branch pipe leading to the main air duct.
valve chamber is similarly arranged in connection with the tops of
the blowing cylinders.
The improvements in the valves consist in making them in the shape
of cylinders, the ports in connection therewith being long narrow slots,
the sides of which are shaped like concave cylindrical segments to act as
seats for the valves. The cylindrical valves may be made in various
ways, but in order to obtain lightness with strength and rigidity they are
by preference made to consist of metal tubes, and such tubes or the seats
or both are, by preference, covered with vulcanised rubber or other
suitable elastic or compressible material.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Hargreaves and William Inglis in the
Great Seal Patent Office on the 2nd June 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
HARGREAVES and WILLIAM INGLIS, both of Bolton, in the County of
Lancaster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of December, in the year
of our Lord One thousand eight hundred and seventy, in the thirty-
fourth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto us, the said William Hargreaves and William Inglis, Her
special licence that we, the said William Hargreaves and William Inglis,
our executors, administrators, and assigns, or such others as we, the said
William Hargreaves and William Inglis, 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 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 BLOWING ENGINES

page_text: AND IN VALVES FOR THE SAME, AND APPLICABLE OTHERWISE," upon the condition
(amongst others) that we, the said William Hargreaves and. William
Inglis, our executors or administrators, by an instrument in writing
under our, 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 we, the said William Hargreaves and William
Inglis, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and
ascertained in and by the following statement in writing, reference
being had to the accompanying Drawings, that is to say:—
Our said Invention has for its objects increased simplicity of con-
struction, convenience for inspection and repairs, and durability, and it
consists in the first place in combining together two vertical blowing
cylinders, the pistons of which are actuated directly by steam cylinders
placed immediately above or below them, with two peculiar valve
chambers placed between and connecting the said blowing cylinders.
Our said Invention also comprises improvements in valves for blowing
engines and applicable otherwise, these improvements consisting in
making the valves in the shape of cylinders, the ports in connection
therewith being long narrow slots, the sides of which are shaped like
concave cylindrical segments to act as seats for the valves.
And in order that our said Invention and the manner of performing
the same, may be properly understood, we hereunto append two Sheets
of explanatory Drawings to be herein-after referred to and representing
a pair of blowing engines as made with our improvements.
Figures 1 and 2 on Sheet 1 of the Drawings are end and side eleva
tions of the blowing engines; Figures 3 and 4, on Sheet 2, are enlarged
vertical sections as at right angles to each other of one of the valve
chambers, and Figures 5 and 6 are sectional views of a single valve with
its seats and guards. The same reference numerals are used to mark
the same or like parts wherever they are repeated.
In the example of our improved blowing engines shown in Figures 1
and 2, the steam cylinders 1, 2, are placed above the blowing cylinders
3, 4, and the piston rods continued through the bottoms of the latter are

page_text: connected to cranks on a horizontal fly wheel shaft carried by bed
plates 5, 6, the cylinders themselves being carried by pillars 7, fixed
down upon the bed plates. The valve chambers 8, 9, are placed between
the blowing cylinders 3, 4, and being bolted thereto by flanges serve to
connect them together and to bind the whole and form a rigid structure.
The upper valve chamber 8 is formed with separate sets of inlets 10 and
valves 11, at its under side for admitting air to the tops of the blowing
cylinders 3, 4, whilst the air from the same ends of the cylinders passes
through outlets 12, and between valves 13 placed above the inlet valves
into a space 14, in the middle and upper part of the chamber 8, and
thence by a branch pipe 15 leading to the main air duct 16. The other
valve chamber 9 is similarly arranged in connection with the bottoms of
the blowing cylinders 3, 4.
For convenience of inspection and repairs the inlet and outlet
ports 10, 12, are cast in separate plates or seat pieces, and are entered:
into their places through openings in the ends of the chambers 8, 9,
which openings are afterwards closed by covers 17, 18. In Figure 3,
one half is shown in section, whilst the covers 17, 18, of the other half
are shown in external elevation. In Figure 4 the section is as taken at
the line A-A, in Figure 3, but a valve 13 is not shown in connection
with the upper or outlet ports 12.
The mode herein described and delineated of combining a pair of
blowing cylinders with intermediate valve chambers is applicable with
hinged or other valves as well as with our improved cylindrical valves.
Our improved cylindrical valves may be made in various ways, but
in order to obtain lightness with strength and rigidity, we prefer that
they should consist of metal tubes, and we also prefer to have such tubes
or the valve seats, or both covered with vulcanised rubber or other
suitable elastic or compressible material. The seats are shaped concavely
to fit the convexities of the cylindrical valves in all cases where it is
desirable to have considerable bearing surface, but in some cases it may
be sufficient to shape them as flat inclined strips on which the valves
will find their own bearing.
In some cases each valve may be applied to a single port 10, as shown
in Figure 6, but where long valves are used the seat plates are
strengthened by cross ribs 19 forming a series of parts for each valve;
guards 20 are fixed down over the valves to prevent them rising higher
than is necessary and to guide them easily into their seats.

page_text: as in
It will be obvious that our improved cylindrical valves may be applied
singly or in sets of any convenient number, wherever hinged, clack, or
other self-lifting valves have hitherto been used,
pumps for
example. We may also observe that the cylindrical valves may be
applied in connection with blowing engines with arrangements of the
valve chambers (8, 9,) differing more or less from those herein described
and delineated, thus for example when a blowing cylinder is placed
horizontally, the valve chambers may be formed in or affixed to the
cylinder covers or ends.
Having thus particularly described our said Invention, and the manner
in which the same is to be performed, we have to state that we do not
restrict ourselves to the precise details herein described and delineated,
but that what we believe to be novel and original and claim as the
Invention secured to us by the herein-before in part recited Letters
Patent is,―
1. The combining together of two vertical blowing cylinders, the
pistons of which are actuated directly by steam cylinders placed im-
mediately above or below them with valve chambers (8, 9,) placed
between and connecting the said blowing cylinders, substantially as
herein-before described.
2. The making of valves for blowing engines and other apparatus in
the shape of cylinders, as herein-before described.
In witness whereof, we, the said William Hargreaves and William
Inglis, have hereunto set our hands and seals, this First day of
June, in the year of our Lord One thousand eight hundred and
seventy-one.
W*. HARGREAVES. (L.S.)
WILLIAM INGLIS. (L.S.)