Improvements in Water Tube Boilers, partly applicable to other Steam Generators.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Water Tube Boilers, partly applicable to other
Steam Generators.
I, WILLIAM NATHAN DACK, of 31 Glenwood, Monton, Eccles, in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be
as follows:-
My invention relates to improvements in water tube boilers for land and marine
purposes, part of my improvements being applicable to other steam generators and
the chief objects of my invention are to improve the circulation in and simplify
the construction of such boilers.
In carrying out my invention I propose to employ any suitable number of inclined
or other water tubes each row of tubes being preferably connected at the top
and bottom to transverse drums; all the lower drums are connected at one or both
ends to a feed water pipe or pipes while the upper drums which form steam and
water drums are preferably connected to a single steam drum or two or more steam
drums from which the steam is conducted. The upper and lower drums may be
connected together by return pipes placed outside the wall of the furnace and the
lewer drums are connected in any convenient manner to a mud drum for clearing
out sediment and ditt from the boiler as required.
The nest of inclined tubes is arranged so that the adjoining rows of tubes are
placed out of line with each other in order that the flame heat and gases from the
furnace may be deflected against and around all the tubes in their passage to
the chimney.
In order to increase the circulation I propose to employ filling up pieces or inner
tubes in any or all of the inclined or other water tubes and this part of my invention
may be applied also to Lancashire and other boilers where Galloway or water
tubes are employed.
Dated this 16th day of June 1896.
H. B. BARLOW & GILLETT,
Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Water Tube Boilers, partly applicable to other
Steam Generators.
I, WILLIAM NATHAN DACK, of 31 Glenwood, Monton, Eccles, in the County
of Lancaster, 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:-
My invention relates to improvements in water tube boilers for land and marine
purposes, part of my improvements being applicable to other steam generators and

page_text: the chief objects of my invention are to improve the circulation in and simplify
the construction of such boilers.
In carrying out my invention I propose to employ any suitable number of inclined
or other water tubes each row of tubes being connected at the top and bottom to
transverse drums; all the lower drums are connected at one or both ends to a feed
water pipe or pipes while the upper drums which form steam and water drums are
preferably connected to a single steam drum or two or more steam drums from
which the steam is conducted. The upper and lower drums are connected together
by return pipes placed outside the wall of the furnace.
The lower drums are connected in any convenient manner to a mud drum for
elearing out sediment and dirt from the boiler as required.
The nest of inclined tubes is arranged so that the adjoining rows of tubes are
placed out of line with each other in order that the flame heat and gases from the
furnace may be deflected against aud around all the tubes in their passage to
the chimney.
In order to increase the circulation I propose to employ filling up pieces or inner
tubes in any or all of the inclined or other water tubes and this part of my invention
may be applied also to Lancashire and other boilers where Galloway or water
tubes are employed.
In the accompanying four sheets of drawings--
Figure 1 is a longitudinal sectional elevation of my improved water tube boiler.
Fig. 2 is a cross section taken on the line A B, Fig. 1.
Fig. 3 is a sectional plan of part of the nest of inclined tubes.
Fig. 4 is a sectional detail illustrating the mode of connecting the inclined tubes
to the transverse drums, the lower drums to the mud drum, and the upper drums to
the steam drum.
Fig. 5 is a cross section of the steam drum.
Fig. 6 is a section of cne of the feed pipes illustrating the mode of connection
to the transverse drums.
Fig. 7 is a cross section of the mud drum.
Fig. 8 is a transverse section of one of the flues of a Lancashire or similar boiler
showing a Galloway tube fitted with an inner tube according to my invention.
In the construction illustrated by Figs. 1 to 7, a designates the furnace bars, b the
inclined water tubes, c the upper row of transverse steam and water drums, d two
steam drums, e the lower row of transverse water drums, the mud drum, g the
feed water pipes, and the economiser tubes.
Each inclined water tube & is expanded at the upper end into a seating formed
to rereive it in its corresponding steam and water drum which in turn is connected
by nipples to the two steam drums d. At the lower end each water tube b is
expanded into a seating formed to receive it in its corresponding water drum e
which in turn is connected by a nipple or short tube; to the mud drum and also
at each end to the feed water pipes g. The preferred mode of connecting the feed
water pipes to the water drums e is illustrated best in the detail view, Fig. 6, from
which it will be seen that a cover k with a hollow conical projection k¹ is bolted to
the end of the drum e and a nipple or short tube is expanded into its inner end
and also into a seating formed for its reception in the feed water pipe 9. The
upper and lower drums ce are connected together as shown in Fig. 3 by return or
circulating pipes a placed outside the wall of the furnace.
In Fig. 4 an inner tube m is shown fitted inside the inclined water tube bin
order to increase the circulation by exposing a thinner film of water to the heat
arising from the furnace. I may employ these inner tubes m in all the water
tubes 6 or in some of them or I may dispense with them altogether in certain
cases.
In Fig. 3 show two rows of water tubes 6 secured in one of the transverse
drums e and I may employ two rows throughout or two rows in some and one row
in each of the remaining drums e.

page_text: I prefer to employ the nipple connections shown and described but I may if
preferred employ ordinary plain joints.
The feed water pipes g which are shown connected to the bottom transverse
drums e may instead, if desired, be connected to the upper drums c.
Also instead of employing inclined water tubes as shown each bottom transverse
water drum may be placed directly below its corresponding top steam and water
drum and the said drums connected together by vertical water tubes.
In Fig. 8, p designates the Galloway tube fitted in the furnace flue g and in the-
inner tube fitted in the Galloway tube p.
Having now particularly described and ascertained the nature of my saidi
invention and in what manner the same is to be performed I declare that what.
I claim is :-
1. The combination with a transverse steam and water drum, of a bottom.
transverse water drum said drums being connected together by inclined or vertical
water tubes and return or circulating pipes placed outside the walls of the furnace
substantially as herein set forth.
2. In combination, a series of rows of inclined or vertical water tubes and return
or circulating pipes placed outside the walls of the furnace each row connected at
the top to a transverse steam and water drum and at the bottom to a transverse
water drum in conjunction with suitable connections to a steam drum or drums,.
mud drum and economiser or feed water heater, substantially as herein set forth.
3. The combination with the water tubes b, of the inner tubes m, substantially as
and for the purposes herein set forth.
4. The combination with a drum e, and its end cover k provided with a hollow
projection, of the nipple and feed water pipe g, substantially as herein
set forth.
5. The combination with a furnace flue and a Galloway or similar water tube p
of the inner tube or filling up piece substantially as and for the purposes herein
set forth.
6. The general construction combination and arrangement of parts embodying.
my improvements substantially as and for the purposes herein set forth.
Dated this 14th day of January 1897.
H. B. BARLOW & GILLETT,
17 St. Ann's Square, Manchester, Agents for Applicant.