Improvements in Apparatus for Producing a Draught in Smoke Stacks and Chimneys.
Year: 1894

page_text: Date of Application, 9th Jan., 1894
Complete Specification Left, 1st Oct., 1894-Accepted, 17th Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Producing a Draught in Smoke
Stacks and Chimneys.
I RAY GAUL of No. 179 Carroll Street, Brooklyn in the County of Kings and
State of New York, United States of America, Engineer, do hereby declare the
nature of this invention to be as follows:--
un-
In constructing a smoke stack with draught-producing apparatus arranged
according to the present invention, the smoke stack is provided with an
obstructed top, to permit the products of combustion to rise freely upwards, and
off into the outside air. The upper part of the stack is provided with a number of
circumferentially arranged lateral openings, to which are fitted the lower ends of
a corresponding number of pipes of upwardly tapering form, which are turned or
projected upwards within the stack, near the walls thereof, for the entrance of air
from without into the upper part of the stack.
For the purpose of producing a rapid movement of the products of combustion
through the stack, in addition to the draught introduced by the currents of air
which enter from the outside of the stack and are discharged upwardly therein,
I provide a blowing apparatus, which may be of any suitable kind, arranged at any
convenient distance from the sinoke stack. The blowing apparatus is arranged to
deliver its air into an annular distributing pipe, from which it is discharged into the
upwardly projecting tubes before mentioned, through inner nozzles, by means of
upright pipes, one for each tube, and which may lead upward either within or
outside the stack.
In operation, the currents of air which are fed into the top of the stack, and
injected into the outwardly moving current of the products of combustion, serve to
form a shield around the upper edge of the stack, to prevent the rapid burning out
of the top of the stack which is so common, particularly where the stacks are
formed of iron, as in case of stacks employed on board vessels.
Dated this 9th day of January 1894.
NEWTON & SON,
Agents for the Applicant
COMPLETE SPECIFICATION.
Improvements in Apparatus for Producing a Draught in Smoke
Stacks and Chimneys.
I RAY GAUL of No. 179 Carroll Street, Brooklyn, in the County of Kings and
State of New York, United States of America, Engineer 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:-
The present invention relates to improvements in draught producing devices for
chimneys and smoke stacks the nature of which improvements will be described
with reference to the accompanying drawings and their novelty set forth in the
claims.
Fig. 1 represents a vertical section of the smoke stack to which my invention is
applied, and
Fig. 2 represents a vertical sectional view of a modification of a part of my
apparatus.

page_text: A is the smoke stack provided with an unobstructed top to permit the products of
combustion to rise freely upwards and pass off into the outside air. The upper
part of the stack is provided with a number of circumferentially arranged lateral
openings a a to which are fitted the lower ends of a corresponding number of
pipes b of upwardly tapering form which are turned or projected upwards within
the stack near the walls thereof for the entrance of air from without into the upper
part of the stack.
For the purpose of producing a rapid movement of the products of combustion
through the stack in addition to the draught introduced by the currents of air
which enter from the outside of the stack and are discharged upwardly therein by
the tubes I provide a blowing apparatus C which may be of any suitable kind,
arranged at any convenient distance from the smoke stack. The blowing apparatus
is arranged to deliver its air into an annular distributing pipe D from which it is
discharged into the tubes through inner nozzles c by means of upright pipes d
one for each tube or pipe 6 and which may either lead upward within the stack as
shown in Fig. 1 or outside the stack as illustrated in Fig. 2. In the example shown
in Fig. 2 the openings a¹ to the upwardly turned, taper pipe & instead of being in
and through the wall of the stack is outside of the stack and the inner nozzle <
enters the said pipe at the back instead of at the bottom.
In operation, the currents of air which are fed into the top of the stack and
injected into the outwardly moving current of the products of combustion serve to
form a shield around the upper edge of the stack to prevent the rapid burning out
of the top of the stack which is so common particularly where the stacks are formed
of iron, as in case of stacks employed on board vessels.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what
I claim :-
1. The combination with a stack provided with an unobstructed top and having
means adapted to be used in connection therewith for producing a rapid movement
of the products of combustion therethrough, of circumferentially arranged air tubes
located near the top of the stack and extending from the outside thereof to its
interior and adapted to discharge air into the current of products of combustion to
form a shield for the top of the stack, substantially as set forth.
2. The combination with a stack provided with an unobstructed top and having
means adapted to be used in connection therewith for producing a rapid movement
of the products of combustion therethrough, of circumferentially arranged air tubes
of tapered form located near the top of the stack and extending from the outside
thereof to its interior and adapted to discharge air into the current of products of
combustion to form a shield for the top of the stack, substantially as set forth.
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