Year: 1898

page_text: Date of Application, 16th Apr., 1898
Complete Specification Left. 2nd Dec., 1898-Accepted, 28th Jan., 1899
We, WILLIAM FITCH CLEVELAND, Engineer, and EUGENE WYMAN CLEVELAND,
Engineer, both of Moncton, in the Province of New Brunswick, Dominion of
Canada, do hereby declare the nature of this invention to be as follows:-
1
The object of this invention is to provide certain improvements in steam
engines, more particularly in locomotive and tandem engines, whereby a greater
or lesser vacuum is produced in the exhaust ends of the cylinder by an induction
or suction action of the main or piston exhaust of one engine upon the valve or
auxiliary exhaust of the other engine.
The invention consists principally of two cylinders with main or piston exhausts
and auxiliary or valve exhausts, arranged in such a manner that the main
exhaust of one cylinder produces a suction on the auxiliary exhaust of the other
cylinder.
In connection with the two cylinders aforesaid a valve chest is provided having
auxiliary or valve exhausts, and a blast pipe having one set of nozzles for the
aforesaid main or piston exhausts, and a second set of nozzles for the aforesaid
auxiliary or valve exhausts, the nozzles being so arranged that the nozzle for
the main exhaust of one cylinder is within and somewhat below the nozzle for
the auxiliary exhaust of the other cylinder, so that the main exhaust steam from
the cylinders creates considerable suction in the valve exhaust chest and thus
relieves the engine of back pressure. A partition divides the two sets of
nozzles.
We, WILLIAM FITCH CLEVELAND, Engineer, and EUGENE WYMAN CLEVELAND,
Engineer, both of Moncton, in the Province of New Brunswick, Dominion of
Canada, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
This invention relates to steam engines, such as shown and described in pre-
vious Letters Patent. granted to us and bearing date September 17th 1895,
No. 17357.
The object of the present invention is to provide certain new and useful

page_text: improvements in steam engines, more particularly locomotive or tandem engines
whereby a greater or a lesser vacuum is produced in the exhaust ends of the
cylinder, by an induction or suction action of the main or piston exhaust of one
engine upon the valve or auxiliary exhaust of the other engine.
The invention consists principally of two cylinders provided with main or
piston exhausts and auxiliary or valve exhausts, arranged in such a manner that
the main exhaust of one engine cylinder produces a suction on the auxiliary
exhaust of the other cylinder.
The invention also consists of certain parts and details and combinations of
the same, as will be fully described hereinafter and then pointed out in the
claims.
Reference is to be had to the accompanying drawings forming a part of this
specification, in which similar characters of reference indicate corresponding
parts in all the figures.
Figure 1 is a cross section of the improvement on the line 1-1 of Figure 2:
Figure 2 is a plan view of the same with parts in section on the line 2-2 in
Figure 1;
Figure 3 is a sectional side elevation of one of the cylinders on the line 3-3 of
Figure 1:
Figure 4 is a like view of the same on the line 4-4 of Figure 1;
Figure 5 is a cross section of one of the cylinders on the line 5-5 of Figure 2;
Figure 6 is a like view of the same on the line 66 of Figure 2;
Figure 7 is a sectional side elevation of the blast pipe on the line 7-7 of
Figure 8; and
Figure 8 is a sectional plan view of the same on the line 8-8 of Figure 7.
The locomotive engines are provided with the cylinders A and A¹, each having
the cylinder ports a b, and a 1, respectively, for the admission of the live steam
and the discharge of part of the exhaust steam, the said ports leading to the
steam chests B and B¹, formed or attached to the cylinders A and A¹ respectively.
Into the ends of the steam chests B and B¹, open. the live steam ports c, d,
and c, d, respectively, of which the ports c, d, are connected with the steam
supply pipe C, and the other ports c, d, are connected with a steam supply
pipe C, the said pipes being arranged on opposite sides of the blast pipe D,
located in the smoke box E of the boiler (see Figure 1).
From the middle of the steam chests B and B lead the piston or exhaust
ports e and el respectively, leading to nozzles G and G₁ respectively, formed within
the blast pipe D. At or near the middle of the cylinders A and A¹ are arranged
the annular main or piston exhaust ports f, f¹, and f, f³, respectively, of which
the ports f, f, of the cylinder A open into an annular chamber g, and the
ports f, f, of the other cylinder A¹ open into an annular chamber g¹, arranged
on the said cylinder A¹.
The chambers g, g', connect with channels h, h¹ respectively opening into the
nozzles F, F, respectively formed in the blast pipe D, but arranged in such a
manner relative to the nozzles G, G¹, that the nozzle F¹ is surrounded
by the nozzle G, and the nozzle F is surrounded by the nozzle G³, a partition H
extending between the two sets of nozzles F, G¹, and F¹, G, so as to completely
separate the same (see Figure 7).
Now it will be seen that the main or piston exhaust from the cylinder A in
passing through the nozzle F creates a suction in the nozzle G¹, through which
passes the auxiliary or valve exhaust from the valve exhaust chest B¹ of the
cylinder A', and the main or piston exhaust from the cylinder A¹ passes through
the nozzle F1 to create a suction in the nozzle G, through which passes the
auxiliary or valve exhaust from the exhaust chest B of the cylinder A, it being
understood that the piston exhaust of one cylinder takes place simultaneously
with the valve exhaust of the other cylinder.
By reference to Figures 1 and 7, it will be seen that the main exhaust
nozzles F, F, have their upper ends somewhat below the upper ends of the sur-

page_text: rounding auxiliary exhaust nozzles G¹, G, so that the main exhaust steam from
the cylinders creates considerable suction in the valve exhaust chests B¹, B to
relieve the engine of all back pressure.
The annular ports f, f, as distinguished from the cylinder ports a, b, have
a greater area opening into the exhaust in the same piston travel, so as to provide
for a more instantaneous and complete release of the steam, and therefore the
interval of time between the opening of the main exhaust and the opening of the
valve exhaust may be reduced, and a consequent reduction of the compression
follows. This arrangement also results that by the more instantaneous exhaust
the steam is converted into dry steam, as distinguished from saturated steam,
and thus the cooling effect of the water on the cylinder walls as well as all other
forms of condensation are avoided. The larger exhaust area with prompter
action and without dividing the steam, increases the velocity of the latter, or it
is less retarded and heavier draft is produced.
The cylinders A, A', are provided with two pistons, and a double valve is
arranged in each of the steam chests B and B and the said pistons and valves
operate in substantially the same manner as described in detail in the patent above
referred to, so that further description of this part of the engine is not deemed
necessary.
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we declare that what we
claim is
1. An engine having two cylinders provided with main or piston exhausts,
and auxiliary or valve exhausts, arranged in such a manner that the main exhaust
of one cylinder produces a suction on the auxiliary exhaust of the other cylinder,
substantially as shown and described.
2. A steam engine, comprising two cylinders provided with main or piston
exhausts, a valve chest for the said cylinders and having auxiliary or valve
exhausts, so that the main exhaust of one cylinder produces a suction on the
auxiliary exhaust of the exhaust chest of the other cylinder, substantially as
shown and described.
3. A steam engine provided with two cylinders having main or piston exhausts,
steam chests for the said cylinders, and provided with auxiliary or valve exhausts,
and a blast pipe having a set of nozzles for the said main or piston exhausts, and
a set of nozzles for the said auxiliary or valve exhausts, the nozzles being
arranged in such a manner that the nozzle for the main exhaust of one cylinder
is within the nozzle for the auxiliary exhaust of the other cylinder, substantially
as shown and described.
4. A steam engine provided with two cylinders having main or piston exhausts,
steam chests for the said cylinders, and provided with auxiliary or valve exhausts,
a blast pipe having a set of nozzles for the said auxiliary or valve exhausts, the
nozzles being arranged in such a manner that the nozzle for the main exhaust of
one cylinder is within the nozzle for the auxiliary exhaust of the other cylinder,
and a partition for dividing the nozzle for the main exhaust of one cylinder and
the nozzle for the auxiliary exhaust of the other cylinder from the corresponding
set of nozzles on the opposite side of the partition, substantially as shown and
described.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.