Improvements in and connected with Water Tube Boilers and their Furnaces.
Year: 1898

page_text: Improvements in and connected with Water Tube Boilers and
their Furnaces.
WILLIAM SAMUEL SARGEANT, of Zachary House, Strand on the Green, Chiswick,
Middlesex, Engineer, and HENRY MATHESON, of 183, Castelnau, Barnes, in the
County of Surrey, Engineer, do hereby declare the nature of this invention to be
as follows;-
:-
-
The object of this invention is an application of the principles of impetus or
accelerated motion to the circulation of steam and water in water tube boilers in
place of the ordinary method of circulation by gravity or unequal densities.
To secure this it will be necessary to leave one end of each generating. tube
free to discharge its contents of steam and water into the steam space above the
water level and not in the ordinary way below it. In the steam drum or collector
we employ the device of a light tank open at the top corresponding to the shape
of the receiver. The top of this tank to coincide in height with the water level
in such steam drum a space to be left between the outside of this tank and the
inside of the drum equal to the collective area of all the tubes. To prevent the
splashing of any water into the steam space we secure a thin strip of metal on
each side of the inside of the drum extending the whole length of the tank a short
distance above the water level the same to be a little wider than the space between
the drum and tank and to have its inner edge inclined downward to deflect the
surplus water back into the tank. To supply the lower ends of the tubes with
water it will be necessary to connect them with the bottom of the tank by means
of pipes or downcomers or other suitable means. For the generation of steam by
this method of circulation we prefer liquid fuel for the ease by which the supply.
of heat may be regulated. The furnace should be supplied with a hearth of non-
conducting material. A few inches above this hearth a metal tube is suspended
At each end of this tube a
extending through the whole length of the furnace.
nozzle should be inserted and set at such an angle that their respective currents
of vapour with their air supply should meet each other about the centre of the
hearth. To supply this tube or vapour generator with the liquid fuel to be
vapourized or sprayed an inner tube a little smaller in diameter but extending the
whole length of this generator is inserted closed at one end but perforated in the
centre of its length with two or three small holes for the exit of such liquid into
the generator.
Dated this 5th dow of February 1898.

page_text: Improvements in and connected with Water Tube Boilers and
their Furnaces.
WILLIAM SAMUEL SARGEANT, of Zachary House, Strand on the Green, Chiswick,
Middlesex, Engineer, and HENRY MATHESON, of 183, Castelnau, Barnes, in the
County of Surrey, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
-
The object of this invention is an application of the principles of impetus or
accelerated motion to the circulation of steam and water in water tube boilers in
place of the ordinary method of circulation by gravity or unequal densities. To
secure this it will be necessary to leave one end of each generating tube free to
discharge its contents of steam and water into the steam space above the water
level F Fig. 1 & 2 and not in the ordinary way below it. In the steam drum or
collector B we employ the device of a light tank C open at top corresponding to
the shape of the receiver. The top of this tank to coincide in height
with the water level in such steam drum a space D to be left between
the outside of the tank and the inside of the drum equal to the collective area
of all the tubes. To prevent the splashing of any water into the steam space we
secure a thin strip of metal E on each side of the inside of the drum extending
the whole length of the tank a short distance above the water level the same to
be a little wider than the space between the drum and tank and to leave its inner
edge inclined downwards to deflect the surplus water back into the tank. To
supply the lower ends of the tubes with water it will be necessary to connect them
with the bottom of the tank by means of downcomers G or other suitable means.
For the generation of steam by this method of circulation we prefer liquid fuel
for the ease by which the supply of heat may be regulated. Fig. 3 & 4 refer to
the furnace which should be supplied with a hearth of nonconducting material H,
a. few inches above or below the line of the vapour nozzles marked I-a metal
tube or tubes N which forms the vapourizer is suspended extending through the
whole length of the furnace. At each end of this tube or tubes a nozzle I should
be inserted and set at such an angle that their respective currents of vapour with
their air supply M should meet each other about the centre of the furnace as
shewn by the arrows K. To supply this tube or vapour generator with the liquid
fuel to be vaporized or sprayed an inner tube J a little smaller in diameter
but extending the whole length of this generator or generators is insurted closed
at one end but perforated in the centre of it length with one or more small holes L
for the exit of such liquid into the generator or generators N.
Fig. 1 of the accompanying drawings is a cross section of the boiler according
to our invention.
Fig. 2 is a longitudinal section of the same. Fig. 3 is a longitudenal section
of the vaporizer or vapourizers forming the furnace of the boiler with their
respective air passages.
Fig. 4 is a cross section of the said furnace.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
-
1st. An application of the principle of impetus to the circulation of steam and
water in water tube boilers by means of a tank open at the top and corresponding
to the shape of tlie drum or receiver in connection with a downcomer to the lower
ends of the tubes substantialy as described with referance to the drawings.

page_text: 2nd. The application of a combined spray and vapour burner for the generation
of steam by such improved method of circulation perfect combustion of spray and
vapour being secured by the method of securing the air spray and vapour sub-
stantialy described with referance to the drawings.
Dated this 4th day of November 1898.
WILLIAM SAMUEL SARGEANT.
HENRY MATHESON.