Improvements in Steam Generators or Boilers.
Year: 1899

page_text: Improvements in Steam Generators or Boilers.
We, ROBERT SMITH of Clyde View, Royal Street, Gourock, Renfrewshire, Scotland,
Engineer, and THOMAS HILL of Robertson Street, Glasgow Lanarkshire, Scotland,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has reference to improvements in, and relating to steam generators
or boilers, for locomotives, marine and land purposes.
According to our invention, in our locomotive boiler, we use tubes or pipes having
an inner tube or pipe inside of each tube or pipe. The distance between the inner
and outer tube or pipe forms an annular space and is utilised for heating and cir-
culating water and generating steam. Ends of tubes or pipes are fixed to headers
or to double tube plates and form a boiler. A fire box or combustion chamber of
nearly the ordinary type is fixed and formed to tube plates at one end of boiler: a
passage formed through double tube plates in firebox and placed below tubes, enables
proportional part of gases of combustion to reach outer tubes of boiler. Tubes or
pipes, inner and outer, are inclined from the horizontal) at an angle, preferably
between 15 and 50 degrees.
The mode of generating steam in our boiler is as follows -The gases of cumbus-
tion are formed in fire box in the usual manner, and are divided in volume by pro-
portional areas of passage through inner and around outer tubes or pipes, eventually
escaping to atmosphere at smokebox end of boiler.
A row or number of tubes placed horizontally between smokebox header and
bottom of fire box act as feeders, and downcomers.
When boiler is used for marine purposes, firebox may be dispensed with, and
conical or cylindrical domes and fire brick furnaces substituted. Gases of cumbustion
are divided in volume in usual way, as heretofore stated.
When boiler is used as a land boiler, inner tubes may be dispensed with and areas
of entrance and outlet formed on tubes for circulation between double tube plates,-
screwed cap nuts being fixed to each end of tubes.
Dated this 26th day of January 1899
EP
We, ROBERT SMITH of Clyde View, Royal Street, Gourock, Renfrewshire Scotland,
Engineer; and THOMAS HILL of Robertson Street, Glasgow, Lanarkshire, Scotland,
Price 8d.

page_text: 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:-
Our said invention has reference to improvements in, and relating to steam
generators or boilers for-locomotive, marine-and-land purposes
And in order that the invention may be properly understood we have appended
the annexed sheets of drawings whereon Fig-1-Sheet-1 is a longitudinal-section-of
n-locomotive-boiler,-Fig-3-Sheet-2-a-sectional elevation of-a-marine-boiler--and
Fig 4 Sheet 1 showing a sectional view of a land boiler all as constructed according
to our invention.
Referring to Fig 1-Sheet 1; in our locomotive-boiler-we-use-outer-tubes-a-having
inner tubes-c-therein,-the-space-between-each-inner-tube-c-and-outer-tube-a-forming
an-annular--space--which-is--utilised---for--heating--and--circulating---water--and
generating steam. At both ends of tubes are upright headers-or-double--tube
plates-b-6-the-onter-tubes-a-being fixed-into--plates-b-and-tubes-c-into--plates-61
thus-forming-a-boiler. A-fire-box or combustion-chamber-d-of-nearly the ordinary
type-and-having-a-baffle-bridge-y-is-formed-and-fixed-to-one-of-the-headers-b-b-ut
one end-of--boiler; the bridge-g-and passage--e-formed in last said-header-below
level-of-tubes-enabling a proportional part of gases-of-combustion-to-impinge-among
and-around-outer-tubes-a. The tubes-a-care-inclined-at-an-angle-preferably-of
from-15-to-50-degrees-from-the-horizontal. A-row-or-number-of-horizontal-tubes-f
are--fixed-between-and--conneet-the-two--sets--of-headers-b.-b-and-act--us--feeders
and-downeomers. The combustion gases flow over the bridge-g-and-are divided in
volume--by--proportional-areas--of--passage--through--tubes-c-and around-tubes-a,
escaping-to-atmosphere-up-chimney-i
Fig 3, Sheet-2-illustrates--a--marine-boiler--as-constructed--nccording--to--our
invention, wherein the-firebox-is-dispensed-with-the-fireburs-h-being-located beneath
the-outer-tubes-a-inside-ench-of-which-tubes-a-is-an-inner tube-c-both-sets-of tubes
being fitted into headers or double-tube--plates--b.----us-before--set-forth--with
reference-to Fig. 1. The top tubes-m-n-for-the flow of steam and water are fitted
at one end into-the-tops-of headers,--and--at--the--other--end--into---n--dome--p³,
Dampers-o-p--at front top-and-back bottom of boiler respectively-may-be-used-to
control-or-vary-the-draught-or-flow of combustion-guses-as desired-to-the-chimney q
The-furnace-door-r-is-formed-in-boiler-front--and the shell is or may be of any
ordinary material and construction.
Referring to Fig. 4-Sheet-1-of the drawings which represents a land boiler as
constructed according to our invention, inner-tubes-are-dispensed-with, the tubes a
being are fitted watertight at each end into both tube plates b. b¹ of headers; and both
ends of said tubes a closed up by screwed cap nuts or plugs 8. Slots or holes v are
formed in the top of tubes a at each end between the plates b. b¹ of equal area to
allow for the circulation of water through them between the two headers. The
higher end of top tubes w has no aforesaid hole v therein, being connected and leading
direct by a branch pipe w¹ to dome y. A short flow pipe x connects bottom of dome
with top of one header. Under-this-modification-the The flame acts only on the
outside of tubes. a, w, which are supported towards their middle by a baffle partition
made round them as shown, over which the flame passes as indicated by arrows from
the-grate f.
Having now particularly described and ascertained the nature of
our said
invention and in what manner the same is to be performed we declare that what
we claim is,
1. In-a-steam-generator,-the-arrangement-and-combination-of-a-set of inner-and
outer-tubes-c-a-; two headers, b---and pipes-f;-substantially-as-and-for-the-purpose
hereinbefore-set forth-and-shown-at-Fig. 1.
2. The arrangement and combination--of-a--set-of- tubes-c-a-;-headers-b.--b¹-;
tubes-m-n-;--dome--p7-;-dampers-o.-p-and-chimney-q; substantially as hereinbefore
set-forth-and-shown-at-Fig. 3.

page_text: The arrangement and combination of a set of tubes a fitted in both sides b. b¹ of
headers and having holes therein and closed at ends, and connected by pipes w¹ x
with a dome y substantially as described and shown at Fig-4.
D. F. MASON,
Patent Agent, Glasgow.