An Improved Draught Regulator for Locomotive-engines.
Year: 1895

page_text: Date of Application, 13th June, 1895
Complete Specification Left, 12th Mar., 1896-Accepted, 23rd May, 1893
PROVISIONAL SPECIFICATION.
An Improved Draught Regulator for Locomotive-engines.
I, ROBERT DEISSLER of 2 Elsen Strasse of Treptow near Berlin, in the
Kingdom of Prussia, German Empire, Engineer do hereby declare the nature of
this invention to be as follows:-
The blast-steam of locomotive-engines is, as is known, used in the same for
producing the draught for the furnace; said draught is dependent on the quantity
of the blast-steam, as well as on the velocity of the same, and both quantity and
velocity of the blast-steam are in their turn dependent, first, on the quantity of live-
steam with which the cylinders are charged at each stroke of their respective
pistons; and, second, on the speed of the locomotive engine.
If the quantity of live steam with which the cylinders at each stroke are
charged is but slight, or of average or normal magnitude, the quantity of waste-
steam resulting from that live-steam is just as great as to produce the required
draught for the furnace, and the fuel will be properly burnt and exhausted; but if
the cylinders are filled with live-steam up to a rather great percentage, say 70%
the draught becomes so strong a one, that unburnt particles of fuel are torn away
from the grate and carried away through the smoke-stack. So great a percentage
of live-steam is necessary if an ascent is to be overcome, or if the train is a long or
heavy one, or if a train is started.
There is thus in either of these cases a loss of fuel caused by said strong draught.
Lessening the latter by a throttle-valve arranged within the smoke-stack is not an
advantageous means, but a disadvantageous one, in that there is then diminished
the way not for the furnace-gases only, but for the waste-steam, too.
The latter
would thus cause an increase of the counter-pressure within the cylinders, and the
gain attained on one side would be lost on the other. The purpose of my invention,
therefore, is to obviate the said losses of fuel without causing the waste-steam to
re-act in the manner just explained, and in order to make my invention more clear,
I refer to the accompanying drawing, in which similar letters refer to similar parts
throughout the different views, and in which:
Figure 1 is a vertical section through the smoke-box and smoke-stack of a
locomotive-engine provided with my improved draught-regulator,
Figure 2 is a horizontal section taken on line 7-8 of Figure 1.
Figure 3 is a vertical section through another form of construction,
Figure 4 is a horizontal section taken on line 9-10 of Figure 3.
Figure 5 is a vertical section through a third form of construction and
Figure 6 is a horizontal section taken on line 11-12 of Figure 5.
My improved draught-regulator cousists in general of a casing, that surrounds
the blast-nozzle and extends from the latter upwards into the smoke-stack, in such
a manner, that the waste steam may freely escape into said stack, whilst either the
whole of the furnace-gases or a certain portion thereof is compelled to pass through
apertures provided in the mantle or vertical wall of the said casing. Said apertures
may be partly or wholly closed by a slide adapted to be vertically displaced along
the casing, which latter forms an upright guide for said slide. The blast itself is
not affected at all by the action of the slide upon the apertures of its guide, i.e. of
the casing, but the flow of furnace-gases through the apertures of that casing is
either lessened or perfectly hindered according to the position of the slide with
regard to the apertures of its guide.

page_text: Referring to Figures 1 and 2, a is the fixed casing or guide, and b the annular
slide, which in this form of construction is arranged outside said casing, or encom-
passes the latter respectively. The casing a is supported by a circular plate d held
by the nozzle B, and extends upwards as far as to touch the walls of the smoke-
stack A. The apertures a¹ of the casing a do not, however, form the only way for
the furnace gases, but there are some apertures d provided in the plate d; it will
thus be seen that a certain draught is left even if the apertures a¹ are perfectly
closed.
Although said bottom apertures d' are not indispensably requisite, I prefer to
construct my improved draught-regulator in such a manner, that there exists besides
the regulable passage (a') for the furnace-gases also a non-regulable one, (d', Figs. 1
& 2), the latter being, however, in either case of such a section that the draught
allowed by said non-regulable or auxiliary passage is strong enough to enable the
fire to produce the normal quantity of steam. The draught-regulator is then to
come into operation in those cases only, in which a greater than the normal quantity
is necessary (compare the preamble).
I have shown two of such forms in Figures 3-6 in which the cylinder, casing or
guide a extends upwards into the smoke-stack A, but leaves (in contra-distinction
to the first mode of construction, Figs. 1 & 2) an annular channel e between itself
and the smoke-stack. Said annular channel is the constantly remaining, non-
regulable passage for the furnace gases, whilst the interior of the cylinder a forms
the regulable one. The ring or slide bis in Figs. 3 & 4 situated outside the
cylinder a and must be raised in order to close the apertures a¹; in Figs. 5 & 6 the
ring 6 is situated inside the cylinder a and is to be lowered if the apertures a¹ are
to be closed.
I prefer to suspend the ring or slide 6 by a chain f and a three-armed connecting-
piece g, but I wish it to be understood that I do not in any way limit myself to
that means; a steel-wire rope, a steel-band, a rigid rod or the like may as well be
used.
Dated this 8th day of June 1895
ROBERT DEISSLER,
38, Alexander Strasse, Berlin, C., Germany,
Engineer and Patent Agent.
An Improved Draught Regulator for Locomotive-engines.
I, ROBERT DEISSLER of 2 Elsen Strasse of Treptow near Berlin, in the
Kingdom of Prussia, German Empire, 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 blast-steam of locomotive-engines is, as is known, used in the same for
producing the draught for the furnace; said draught is dependent on the quantity
of the blast-steam, as well as on the velocity of the same, and both quantity and
velocity of the blast-steam are in their turn dependent, first, on the quantity of
live-steam with which the cylinders are charged at each stroke of their respective
pistons; and, second, on the speed of the locomotive engine.
If the quantity of live-steam with which the cylinders at each stroke are charged
is but small, or of average or normal magnitude, then the quantity of waste-steam
resulting from that live-steam is just as great as to produce the required draught
for the furnace, and the fuel will be properly burnt and exhausted; but if the
cylinders are filled with live-steam up to a rather great percentage, say 70%, the
draught becomes so strong, that unburnt particles of fuel are torn away from

page_text: the grate and carried away through the smoke-stack. So great a percentage of
live-steam is necessary if an ascent is to be overcome, or if the train is a long or
heavy one, or if a train is started.
There is thus in either of these cases a loss of fuel caused by said strong draught..
Lessening the latter by a throttle-valve arranged within the smoke-stack is not an
advantageous means, but a disadvantageous one, in that there is then diminished
the way not for the furnace-gases only, but for the waste-steam, too. The latter
would thus cause an increase of the counter-pressure within the cylinders, and the
gain attained on one side would be lost on the other. The purpose of my invention,
therefore, is to obviate the said losses of fuel without causing the waste-steam to
re-act in the manner just explained, and in order to make my invention more clear,
I refer to the drawings sent in with Provisional Application, in which similar letters
denote similar parts throughout the different views, and in which :
Figure 1 is a vertical section through the smoke-box and smoke-stack of a
locomotive-engine provided with my improved draught-regulator,
Figure 2 is a horizontal section taken on line 7-8 of Figure 1.
Figure 3 is a vertical section through another form of construction,
Figure 4 is a horizontal section taken on line 9-10 of Figure 3.
Figure 5 is a vertical section through a third form of construction, and
Figure 6 is a horizontal section taken on line 11-12 of Figure 5.
My improved draught-regulator consists in general of a casing, that surrounds
the blast-nozzle, and extends from the latter upwards into the smoke-stack, in such
a manner, that the waste steam may freely escape into said stack, whereas either
the whole of the furnace-gases or a certain portion thereof is compelled to pass
through apertures provided in the mantle or vertical wall of the said casing. Said
apertures may be partly or wholly closed by a slide adapted to be vertically
displaced along the casing, which latter forms an upright guide for said slide. The
blast itself is not affected at all by the action of the slide upon the apertures of its
guide, .e. of the casing, but the flow of furnace-gases through the apertures of that
casing is either lessened or perfectly hindered according to the position of the slide
with regard to the apertures of its guide.
Referring to Figures 1 and 2, a is the fixed casing or guide and 6 the annular
slide, which in this form of construction is arranged outside said casing, or
encompasses the latter respectively. The casing a is supported by a circular
plate d held by the nozzle B, and extends upwards as far as to touch the walls of
the smoke-stack A. The apertures a of the casing a do not, however, form the
only way for the furnace gases, but there are some apertures d provided in the
plate d; it will thus be seen that a certain draught is left even if the apertures a¹
are perfectly closed.
1
Although said bottom apertures d' are not indispensably requisite, I prefer to
construct my improved draught regulator in such a manner, that there exists
besides the regulable passage (a¹) for the furnace-gases also a non-regulable one
(d, Figs. 1 & 2), the latter being, however, in either case of such a section that the
draught allowed by said non-regulable or auxiliary passage is strong enough to
enable the fire to produce the normal quantity of steam. The draught-regulator
is then to come into operation in those cases only, in which a greater quantity than
the normal one is necessary (compare the preamble).
I have shown two of such forms in Figures 3-6 in which the cylinder, casing
or guide a extends upwards into the smoke-stack A, but leaves (in contra-distinction
to the first mode of construction, Figs. 1 & 2) an annular channel e between itself
and the smoke-stack. Said annular channel is the constantly remaining, non-
regulable passage for the furnace gases, whilst the interior of the cylinder a forms
the regulable one.
The ring or slide bis in Figs. 3 & 4 situated outside the
cylinder a, and must be raised in order to close the apertures a¹; in Figs. 5 & 6 the
ring is situated inside the cylinder a and is to be lowered if the apertures a¹ are
to be closed.

page_text: I prefer to suspend the ring or slide 6 by a chain f and a three-armed connecting-
piece g, but I wish it to be understood that I do not in any way limit myself to
that means; a steel-wire rope, a steel-band, a rigid rod or the like may as well be
used.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a locomotive engine, the combination with the chimney, and with a blast-
nozzle arranged in the proximity of said chimney, of a vertical slide surrounding
said nozzle, and a guide for said slide; said guide extending from the nozzle up
into the chimney, and having a few large apertures the combined free sections of
which are at least as great as the free horizontal section of the said guide; said
slide being adapted to narrow said apertures, for the purpose as described.
2. In a locomotive engine having a portion of its chimney contracted, the
combination with a blast nozzle arranged in close proximity to said chimney, of a
vertical slide surrounding said nozzle, and a guide for said slide; said guide
extending up to the contracted portion of the chimney, and forming a few large
apertures the combined free sections of which are at least as great as the free
horizontal section of the said guide; said slide being adapted to narrow said
apertures, for the purpose as described.
Dated this 9th day of March 1896.
ROBERT DEISSLER,
38, Alexander Strasse, Berlin, C., Germany,
Eugineer and Patent Agent.
ROBERT DEISSLER,
38, Alexander Strasse, Berlin, C., Germany,
Engineer and Patent Agent.