IMPROVEMENTS IN STEAM GENERATORS
Year: 1883

page_text: LETTERS PATENT to Alexander Melville Clark of the firm of A. M and
W Clark of 53 Chancery Lane in the County of Middlesex Fellow of
the Institute of Patent Agents for an Invention of "IMPROVEMENTS IN
STEAM GENERATORS." Communicated to him from abroad by Mills Wagner
Barse of Olean in the County of Cattaraugus and State of New York, United
States of America.
PROVISIONAL SPECIFICATION left by the said Alexander Melville Clark
at the Office of the Commissioners of Patents on the 16th January 1883.
"
ALEXANDER MELVILLE CLARK of the Firm of A. M. and W. Clark of 53 Chancery
Lane in the County of Middlesex Fellow of the Institute of Patent Agents
" IMPROVEMENTS IN STEAM GENERATORS [Communicated to him from abroad
by Mills Wagner Barse of Olean in the County of Cattaraugus and State of New
York, United States of America.]
The object of this Invention is to construct a durable steam boiler whereby
steam may be rapidly generated with economical consumption of fuel.
To that end the Invention consists in a water chamber placed to form the back
or bridge-wall of the furnace and provided with circulation tubes which extend
into the fire box and combustion chamber, as hereinafter described.
The upper side of the fire box is formed at an inclination and the boiler or
water chamber is placed at the back of the fire box and extends into the side walls
at its ends. The combustion chamber is at the back of the boiler leading to the
chimney. The steam drum extends transversely of the fire box, and above the
boiler, being supported by the side walls of the fire-box but the drum may, if
desired, extend lengthwise of the stack. The position of the drum is such that
there is a space between the upper edge of the boiler and the underside of the
drum, so that the products of combustion from the fire box may pass freely over.
The drum is connected with the boiler by a tube furnished with an interior tube
which extends down to or near the middle portion of the water chamber. It is to
be supported in any suitable manner and serves to prevent disturbance of the
D433

page_text: equilibrium of the water by the steam passing to the drum. The water chamber
or boiler is made of long and flat form so as to form a bridge-wall at the back of
the fire box. To the sides of the water-chamber the circulation tubes are connected
by both ends to the shell of the boiler and they project, those on one side into the
fire-box and those at the other side into the combustion chamber. They are also
placed alternately, so that the heat and products of combustion passing through
between them shall be caused to come more intimately in contact with the tubes.
The tubes are attached by unions which are formed at one end with a right hand
thread to receive the tube, and at the other end with a reverse thread for entering
the shell of the boiler. They are to be made of steel or malleable iron and are
formed with an angle-faced portion which allows attachment of a wrench. The
tubes may be placed on one or both sides of the water chamber and as they aro all
attached with one end of each higher than the other a circulation of water through
them is secured.
This construction furnishes a safe, inexpensive and durable boiler of compact
form not liable to become injured by expansion and contraction. It is to be
observed that each tube is independent so that each one is free to expand and
contract according to the heat it may receive without affecting the others. There
will be a continual circulation of the water through the tubes, which will cause
sediment to fall to the bottom of the water chamber, where hand holes are provided
for its removal.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alexander Melville Clark in the Great Seal Patent Office on the
14th July 1883.
ALEXANDER MELVILLE CLARK of the Firm of A, M, and W, Clark of 53 Chancery
Lane in the County of Middlesex Fellow of the Institute of Patent Agents
"IMPROVEMENTS IN STEAM GENERATORS " A communication to me from abroad
by Mills Wagner Barse of Olean in the County of Cattaraugus and State of Now
York, United States of America.
The object of this Invention is to construct a durable steam boiler for the rapid
generation of steam with an economical consumption of fuel. To that end the
Invention consists in a water chamber placed to form the back or bridge wall of
the furnace and provided with circulation tubes which extend into the fire box and
combustion chamber as hereinafter described.
The Invention is illustrated in the accompanying drawings in which similar
letters of reference indicate corresponding parts in all the figures. Figure 1 is a
longitudinal section of this improved construction of boiler. Figure 2 is a trans-
verse section of the same on the line xx of Figure 1. Figure 3 shows the
connection of the tubes to the shell of the water chamber.
A is the fire box provided with grate bars a and having its upper side formed
at an inclination as shown. B is the boiler or water chamber placed at the back
of the fire box and extending into the side walls at its ends. C is the combustion
chamber at the back of the boiler B, and D is the chimney. E is the steam drum
which extends transversely of the fire box and above the boiler, being supported
by the side walls of the fire box, but the drum may if desired extend lengthwise of
the stack. The position of the drum is such that there is a space between the
upper edge of the boiler B and the underside of the drum, so that the products of
combustion from the fire box may pass freely over. b is a tube connecting the
drum E and the boiler B, and d is an interior tube which extends down to or near
the middle portion of the boiler or water chamber B. It is to be supported in any
suitable manner and serves to provent disturbance of the equilibrium of the water
by the steam passing to the drum. The water chamber or boiler B is made of long
and flat form so as to form a bridge wall at the back of the fire box. To the sides
of the water chamber B the circulation tubes e are connected by both ends to the
shell of the boiler and they project, those on one side into the fire box A, and those
at the other side into the combustion chamber C. They aro also placed alternately
so that the heat and products of combustion passing through between them shall
be caused to come more intimately in contact with the tubes. The tubes are
attached by the unions F shown in Figure 3 which are formed at one end with a
right hand thread to receive the tube, and at the other end with a reverse thread
for entering the shell of the boiler. They are to be made of steel or malleable iron
and are formed with an angle faced portion which allows attachment of a wrench.
The tubes e may be placed on one or both sides of the water chamber, and as they
are all attached with one ond of each higher than the other, a circulation of water
through them is secured.
This construction furnishes a safe, inexpensive and durable boiler of compact
form not liable to become injured by expansion and contraction. It is to bo
observed that each tube is independent so that each one is free to expand and
contract according to the heat it may receive without affecting the others. There
will be a continual circulation of the water through the tubes which will cause the
sediment to fall to the bottom of the water chamber B where hand holes are
provided for its removal.

page_text: Having described the nature of the said Invention and the manner of performing
the same, I declare that what I claim as the Invention to be protected by the
herein before in part recited Letters Patent is.
1st The combination with the furnace having chimney D of the transverse steam
drum E partly in the furnace, the bridge wall, boiler B having on each side the
pipes e connecting therewith at both ends, and the connecting pipe b whereby the
products of combustion will come in contact with the drum, both sides of the
boiler and the pipes on each side of the boiler, as described.
2nd The combination with the boiler steam drum, tubo b, and furnace all arranged
substantially as described, of the pipes e curved successively around one another
and secured at both ends to the boiler, and the tube & having its upper end in the
steam drum and its lower end in the boiler below the upper end of each pipe e as
shown to operate as described.
In Witness whereof I the said Alexander Melville Clark have hereunto set my
hand and seal this ninth day of July, A.D. 1883.