IMPROVEMENTS IN STEAM GENERATORS
Year: 1877

page_text: LETTERS PATENT to Charles Tyson, of the City of Philadelphia, in the County
of Philadelphia, and State of Pennsylvania, in the United States of America,
for the Invention of "IMPROVEMENTS IN STEAM GENERATORS."
PROVISIONAL SPECIFICATION left by the said Charles Tyson at the Office
of the Commissioners of Patents on the 18th December 1877.
CHARLES TYSON, of the City of Philadelphia, in the County of Philadelphia, and
State of Pennsylvania, in the United States of America. "IMPROVEMENTS IN STEAM
GENERATORS."
This Invention relates to improvements in steam generators, and consists in the
combinations of parts herein-after described, in which is employed a supplemental
pressure supply for a steam generator by means of an air chamber conducting water
to an evaporating coil, in which it is vaporized, and from and through which it is
conveyed to the steam chest of an engine.
The supply to the engine in connection with my improved steam generator may
be controlled by means of a cock. A submerged pump operated by the said engine
supplies water to the said air chamber, from whence it is forced to the coil, a spring
valve in a pipe between the pump and the said air chamber regulating the supply.
The said air pressure chamber is connected with a pipe, the coiled portion of
which is enclosed in a furnace or case having a flue and a grate. The heating
medium may be petroleum or other gas-generating fluid, or any other suitable com-
bustible material, and the character of the grate or burner will depend upon the
nature of the fuel employed. There is a pipe leading from the said air chamber to
a check or spring valve, and thence to a pump which is submerged in a tank. The
water being fed to the said air chamber, it compresses the air contained therein to a
suitable degree, and flows into the said coil of the furnace. Immediately on its
entrance it is evaporated by heat, and passes to the engine in the condition of steam.
By means of the aforesaid cock the steam may be regulated in its flow to the

page_text: engine; thus, when the flow is too rapid the said cock may be gradually closed,
and water be prevented from working into the coil, which, as far as possible, is
intended for steam alone. The elasticity of the air causes steadiness and regularity
in the flow of water to the coil. In case the supply should exceed the amount
required the said spring valve will open outwardly and discharge the surplus into
the said tank. A coil wire is used in the coil pipe for the purpose of aiding in the
heating of the water. The said pump is provided with mechanism, whereby it may
be operated independently of the engine. The said pump is supported on standards,
its shaft having a bearing therein; and in a supplemental standard provided for the
purpose a spur wheel driven by a pinion is loose upon the pump shaft, but con-
nected therewith when desired by means of a ratchet wheel, which is tight on the
pump shaft, and a spring pawl pivoted to an arm of the said spur wheel. The
crank of the said pump is extended so as to form a crank handle, by means of
which, when the pawl and ratchet are freed, the pump may be worked by hand
independently of the engine.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Tyson in the Great Seal Patent Office on the 18th June
1878.
CHARLES TYSON, of the City and County of Philadelphia, and State of Pennsyl-
vania, United States of America, Mechanical Engineer. "IMPROVEMENTS IN STEAM
GENERATORS.'
My Invention relates to pipe steam generators for engines, and the mode of
automatically feeding the same with water, and consists in the use of supplemental
pressure equal to the working pressure of the motor, which pressure may be
induced by an air chamber, hydrant, or equivalent, to automatically feed water to
the generating pipe during the operation of the motor, so that upon the stoppage
of the motor subsequent generations of steam shall expel the water from the
generating pipe, and thus further generation of steam be prevented whilst the
motor is at rest.
4+
It further consists in the combination of parts herein-after described, in which is
employed a supplemental pressure supply for a steam generator by means of an air
chamber; forcing water to a generating coil, in which it is vaporized, and from and
through which it is conveyed to the steam chest of the engine for useful work.
The supply to the engine is controlled by means of a throttle; a pump operated by
the engine supplies water to the air chamber, from which it is forced to the coil;
a spring controlled outlet valve in the pipe, between the pump and air chamber,
regulating the supply.
In the Drawings Figure 1 is a vertical longitudinal view; and Figure 2 a plan
view of the same.
A is the air chamber, connecting with the pipe B, the coiled portion B' of
to #and

page_text: coiled portion B" of which is enclosed in a tight case or box C', into which the
exhaust steam from the engine empties by means of a pipe C, the object of which
latter arrangement is the utilization of the exhaust steam of the engine by its
application to the heating of the water in the coil B₁ prior to its entrance into the
coil B¹, in which latter it is converted into steam as more fully herein-after
explained; c is the cock by which the water of condensation escapes from the
case C¹.
The heating medium may be petroleum or other gas-generating fluid or other
suitable combustible material, and the chamber of the gate or burner will depend
upon the nature of the fuel employed; E is the pipe leading to the chamber A from
the pump D, which latter connects, by means of a pipe D', with any water supply.
On water being fed to the chamber A it compresses its contained air to a suitable
degree, and flows through pipe B and coil B into the coil B¹ of the furnace C..
In its passage through the coil B¹ it is evaporated by heat, and passes to the engine
(represented by I) in the condition of steam; K is a throttle, by means of which the
steam can be regulated in its flow to the engine.
In case the supply of water should exceed the amount required, the spring valve
F will open outwardly and discharge the surplus.
The pump is so constructed or so provided with mechanism that it may be
operated independently of the engine. In the form of apparatus shown the pump
may be independently operated by throwing off the belt d and attaching a crank
handle or the like to the pulley d. The pump D is supported on a standards, its
shaft d' having a bearing therein and in a supplemental standard 2".
I do not limit myself to the particular mechanical devices herein shown and
described, or the arrangement and combination of the same, but I set them forth as
an advantageous combination of mechanical devices for the embodiment of my
Invention.
It will be readily understood that a supplemental pressure may be induced and
applied by an air chamber, loaded piston, or hydrant or other equivalent device, that
a straight generating pipe instead of a coil pipe may be employed, and that the
form and arrangement of the furnace C may be varied to suit the requirements of
the fuel used.
I claim as my Invention,―
1. In a pipe steam generator, the use of a supplemental pressure equal to the
working pressure of the motor, induced by an air chamber, hydrant, or equivalent,
to automatically feed water to the generating pipe during the operation of the
motor; so that upon stoppage of the motor subsequent generation of steam shall
expel the water from the generating pipe, and thus further generation of steam be
prevented whilst the motor is at rest, substantially as described.
2. In a pipe steam generator the combination of a water reservoir G, pumps D,
air chamber A, generating pipe B¹, and furnace H, substantially as shown and
described, and for the purposes set forth.
In witness whereof, I, the said Charles Tyson, have hereunto set my
hand and seal, this Twenty-eighth day of January 1878.
In the presence of
WILLIAM C. STRAWBRIDGE,
J. BONSALL TAYLOR.
CHARLES TYSON. (LS.)