IMPROVEMENTS IN COMBINED HIGH AND LOW-PRESSURE STEAM from abroad by
Year: 1874

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," Southampton Buildings, London, Doctor of Laws, for the
Invention of "IMPROVEMENTS IN COMBINED HIGH AND LOW-PRESSURE STEAM
from abroad by Thomas L. Jones.
LETTERS PATENT to George Haseltine, of the "International Patent
Office," Southampton Buildings, London, Doctor of Laws, for the
Invention of " IMPROVEMENTS IN COMBINED HIGH AND LOW-PRESSURE STEAM
ENGINES." A Communication from abroad by Thomas L. Jones,
residing at Natchez, State of Mississippi, United States of
America.
PROVISIONAL SPECIFICATION left by the said George Haseltine at
the Office of the Commissioners of Patents, with his Petition, on
the 25th November 1874.
I, GEORGE HASELTINE, of the "International Patent Office," South-
5 ampton Buildings, London, Doctor of Laws, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN COMBINED HIGH AND
LOW-PRESSURE STEAM ENGINES," a communication, to be as follows :-

page_text: It
Specification of former Letters Patent dated 2nd January A.D. 1874,
No. 85, can be secured in engines making from fifty to seventy
revolutions per minute, such as in use in sea-going steamers.
consists mainly in the peculiar means herein-after described, whereby
the exhaust steam at cach stroke of the piston as it leaves the cylinder
is at first partly (namely, all saving one atmosphere) suddenly exhausted
into the open air, and afterwards (namely, the remaining one atmosphere)
diverted into a condenser.
The valve chest, which with reference to the engine cylinder may be
arranged in any suitable position, is connected with the exhaust port of
the said cylinder by an exhaust pipe which opens into the chest at one
or two openings. A partition or valve scat extends through the chest
and divides the same. The space above the seat is what I term a
diverting chamber. In the valve seat arc arranged a series of what I
term atmospheric ports, and also a series of what I term condenser ports.
These atmospheric and condenser ports are arranged alternately, the
atmospheric ports being at the ends. It is essential to have several
openings, and they must be narrow in the direction of the movement of
the valve and wide in the opposite direction.
The atmospheric ports open into a common chamber which is provided
with an escape pipe leading to the open air immediately or through a
suitable heater to heat feed water for the boiler. Thic condenser ports
lead into as many passages, which in turn lead into a common chamber
provided with a pipe leading to a suitable condenser. A valve is
arranged to slide upon the valve seat, and is provided with openings
similar in shape and size to the ports, but so spaced apart as to cause
them in the movement of the valve either to coincide with the
atmospheric ports and close the condenser ports, or to coincide with the
condenser ports and close the atmospheric ports. The said valve through
an eccentric rod is operated by a round eccentric, or a suitable cut-off
cam which is fastened to the main shaft.
The slide valve is properly adjusted to and held against the valve scat
by means of a peculiar device, which consists of two similar arms con-
nected by a cross piece that is journalled in the arms midway in their
length, and to which in turn at its centre by a jointed connection is
attached an upright stem. The latter extends out through the wall of
the valve chest and through a suitable stuffing box; opposite and against
the outer end of the skin and working in a suitable bearing is a set

page_text: screw. At the ends of these arms and towards the valve are projections
constituting four friction points which bear upon the slide valve. The
said arms are about the length of the distance from the extreme port at
one end of the valve scat to the extreme port at the opposite end.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Haseltine in the Great Seal Patent Office
. on the 19th May 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
TASELTINE, of the "International Patent Office," Southampton Build-
ings, London, Doctor of Laws, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of November, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said George Haseltine, Her special licence that
I, the said George Haseltine, my executors, administrators, and assigns,
or such others as I, the said George Haseltine, my exccutors, admini-
strators, 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 COMBINED
HIGH AND LOW-PRESSURE STEAM ENGINES," a communication to me from
abroad by Thomas L. Jones, a resident of Natchez, State of Mississippi,
United States of America, upon the condition (amongst others) that
J, the said George Haseltine, my executors or administrators, by an
instrument in writing, under my, or their, or one of their hands and
scals, 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 Scal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said George Haseltine, 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

page_text: •
the following statement, reference being had to the accompanying
Drawing forming a part of this Specification :—
This Invention is designed to provided a construction by mcans
whereof results similar to those obtained by the devices described in the
Specification of former Letters Patent dated 2nd January A.D. 1874,
No. 35, can be secured in engines making from fifty to seventy
revolutions per minute, such as are used in sca-going steamers. It
consists mainly in the peculiar means herein-after described, whereby the
exhaust steam at each stroke of the piston as it leaves the cylinder is at
first partly, that is, all saving one atmosphere, suddenly exhausted into
the open air, and afterwards, that is, the remaining one atmosphere,
diverted into a condenser.
In the accompanying Drawing Figure 1 is a horizontal section on the
line, a¹, of Figure 2, shewing the connecting pipe through which the
exhaust steam is taken; Figure 2 is a transverse vertical section on
the line y, y', of Figure 1, also showing the connecting pipe.
Figure 3 is a side view of the said Invention the side plate thereof,
and also the device for holding the valve in place being removed, and
the valve being arranged as in Figure 1.
Figure 4 is a view similar to Figure 3, but with the valve arranged as
in Figure 2. In this and in the preceeding view the connection with the
main shaft and the eccentric thereon are shown.
Figure 5 is a perspective view of the device for holding the valve in
position.
A, Figures 1, 2, 3, 4, represents a valve chest, which with reference to
the engine cylinder may be arranged in any suitable position. The
chest A is connected with the exhaust port of thc cylinder by means of
an exhaust pipe B which opens into the chest A at one or (as preferred)
two openings b, 6. The ordinary engine cylinder and its piston are not
shown, as their construction and operation are well understood, and a
because this Invention is used in connection with the exhaust stcam
only as it is liberated from the engine by its own ordinary valve.
The chest A so far as its outer walls are concerned is preferably of the
form shown. I do not however in this respect wish to be limited to any
particular shape. O represents a partition or valve scat extending
through the chest and dividing the same. The space D above the seat C

page_text: is what I term a diverting chamber. In the valve seat are arranged a
series E, E', E, E³, of what I term atmospheric ports, and also a
series F, F¹, F, of what I term condenser ports.
The atmospheric and condenser ports are arranged alternately, as
shown in Figure 1, the atmospheric ports being at the ends. I do not
desire to be limited to the number shown. It is however essential to
have several openings and of the shapo shown, namely, quite narrow in-
the direction of the movement of the valve and quite wide in the opposito
direction.
The atmospheric ports open into a common chamber G, which is
provided with an escape pipe H leading to the open air immediately or
through a suitable heater. The condenser ports respectively lead into as
many passages f, ƒ³, ƒª, which in turn lead into a common chamber I
which is provided with a pipe J leading to a suitable condenser.
K represents a valve arranged to slide upon the valve scat C. It is
provided with openings, 1, 1, 1, similar in shape and size to the
ports E and F, but so spaced apart as to cause them in the movement of
the valve, either to coincide with the atmospheric ports and close the
condenser ports or to coincide with the condensor ports and close
the atmospheric ports. The valve through the eccentric rod L, Figures 3
and 4, is operated by a round eccentric M, Figures 3 and 4, which is
fastened to the main shaft N.
The valve K is properly adjusted to and held against the valve seat C.
by means of a peculiar device O shown in Figures 1, 2, and 5. This
devico consists of two similar arms P, P', which are connected by a cross
piccc Q that is journalled in the arms midway in their length, and to
which in turn at its centre by a jointed connection is attached an upright
stem R which extends out through the wall a of the valve chest A and
through a suitable stuffing box S; opposite and against.the outer end of
the stem R and working in a suitable bearing t is a set screw T. At
the ends respectively of the arms P, P', and toward the valve K are
projections d, d³, d, d³, constituting four friction points which bear
upon the valve. The arms P, P¹, in length are about that of the distance
from the extreme port at one end of the valve scat to the extreme port at
the opposite end. The valve K is preferably connected with its stem k*
on the inner side of the stem R.
In operation the steam at each movement of the piston being liberated
from the engine by the ordinary valve into the ordinary exhaust pipe

page_text: passes therefrom through the pipe B into the chamber D circulating
freely against the valve K. As the engine begins to exhaust (the
eccentric M and valve K being suitably adjusted), the valve K moves so
as to open the atmospheric ports, as shown in Figure 3, and all but one
atmosphere of steam passes off into the open air. It is essential that
such liberation of all but one atmosphere of steam be effected as speedily
as possible, and that the principal portion of the stroke of the piston be
in connection with the condenser. This is accomplished by using
several ports and arranging them all as described, and by the arrange-
ment of the eccentric. Thus constructed and arranged the entire series
of atmospheric ports open simultaneously and suddenly, affording a free
passage for the steam and as suddenly close. The condenser ports then
open, as shown in Figuro 4, and the remaining one atmosphere of steam
is diverted into the condenser. The excentric is set so that only a slight
part of its throw will open and close the atmospheric ports, the remainder
thereof being in connection with the condenser ports. Owing also to
the arrangement of the condenser ports the openings in the valve
necessarily coincide for a longer period with them. This is desirable to
secure a perfect vacuum. Should however it be desired to throw moro
of the exhaust into the open air the eccentric can be moved back or
forward on the main shaft accordingly.
It will be observed that while the exhaust steam of the engine is
passing off through the atmospheric ports there is pressure of but one
atmosphere upon the valve K, and that is upon its upper side and over the
condenser ports. But when the valve changes and its openings are put
in connection with the condenser, a vacuum is formed in the diverting
chamber D in connection with the condenser and the engine cylinder,
and consequently against the under side of the valve and opposite the
atmospheric ports a pressure of one atmosphere is exerted. The valve
therefore must be held in place by some agency, which at the same time
will not interfere with the free circulation of the steam throughout the
diverting chamber. For this purpose I use the device O. By means of
the set screw T the device at the four points d, d¹, d³, d³, is set up
against the valve and caused to support it. The four points d,,d', d², d³,
are caused to press evenly upon the valve in consequence of the universal
joint formed by means of the joints at the ends of the cross piece Q and
at the end of the stem R. Should the device become loose it can be
readily adjusted by turning the set screw T. The arms P, P¹, of the
device O are kept from being dislodged under the sliding motion of the
•

page_text: valve by four studs, two of which are shown at e, e¹, Figure 1, set
similarly in the walls of the chest, and so as to liold the arms P, P¹, in
place. In Figure 1 the arrows indicate the course of the steam to the
open air, and in Figure 2 to the condenser.
Having thus fully described the said Invention as communicated to
me by my foreign correspondent, and the manner of performing the
same, I wish it understood that I claim,—
First. The valve chest A provided with the valve scat C, the
chambers D, G, passages f, f¹, f, the valve K, and device O, com-
bined, arranged, and operating as above described and for the purpose
specified.
Second. The valve seat C and the valve K provided respectively with
the manifold ports, and the openings k, k³, k², kª, arranged and operating
as and for the purpose described.
Third. The device O constructed, arranged, and operating as described
in combination with the valve K for the purpose specified.
Fourth. The device O, valve K, and set screw T, arranged and
operating as and for the purpose specified.
Fifth. The combination of the chest A, chambers D, G, passages f,
ƒ¹ƒª, pipes J and H, valve K, and its seat C. The said valve and scat
being provided respectively with the openings k, l, k, ³, and the
ports E, E, E, E³, and F, F¹, F, relatively adjusted and arranged and
operating to throw the exhaust steam at each stroke of the piston partly
into the open air and partly into the condenser as above described.
In witness whereof, I, the said George Haseltine, have hereunto
set my hand and scal, this Nineteenth day of May, in the
year of our Lord One thousand eight hundred and seventy-
five.
Witness,
JA³. EDWARDS,
8, Southampton Buildings,
London.
GEORGE HASELTINE. (L.s.)