Improved Construction of Water Tube Steam Generator.
Year: 1894

page_text: Improved Construction of Water Tube Steam Generator.
We, SIMPSON, STRICKLAND & Co., LIMITED, and FREDERIC STRICKLAND,
all of Dartmouth, South Devon, Engineers and Launch Builders, 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 invention relates to water tube steam generators and has for its object to
provide a very efficient generator particularly adapted for confined spaces such as
in steam launches and like places.
We will describe our invention in reference to the accompanying drawings in
which Fig. 1 is a longitudinal section of our improved generator, Fig. 2 a half plan
thereof with upper casing removed, Fig. 3 is to the right a half front elevation, to
the left a quarter front view with casing removed, and intermediately a quarter
section on line 1-2 of Fig. 1.
Similar letters refer to similar parts in all the figures.
In a boiler arranged according to our improved construction we employ a
combined steam and water drum D, transversely arranged at the upper part of one
end of the generator, from the lower part of which in longitudinal direction and
almost for its full length depend a series of rectangular headers or water boxes H H
in contact laterally one with another. They may be of cast or wrought metal and
are substantially of the form shown, provided with angularly formed and bored
tube bosses B B on the tube plate side, and at the back with a removable plate h,
or alternatively with screwed bosses and screw plugs P on a fixed plate has
illustrated. The lower ends of all these back headers H are in open communication
with a lower transverse collector C, the connection being effected by corresponding
circular screwed nipples N N of reduced diameter on each part, and a union or
collar n.
The collector is provided with the usual blow out or cleaning devices.
Each back header is connected direct by a group of straight tubes T to the lower
portion of an opposite corresponding header H' forming one of a similar series of
front headers arranged at a higher level and at any required distance from the
back series. This distance is determinable by the space available for any boiler,
and the height of the front headers H above the base plate L of the boiler and
consequent inclination of the series of tubes T is determinable by the height
required for fire box F which with its door f and grate G with ashpit below is
disposed beneath and for the full width of the several tube groups T. The upper
parts of the front headers H' are directly connected to the inner side of drum D by
a second series of tubes T¹, the direction and angularity of which is determined by
the height of the said headers H' in regard to the drum D. Circulation of water
takes place in the direction of the full arrows from drum D down headers H, up
tubes T and headers H', returning to drum D by tubes T'. The whole is enclosed
in a casing E, loss of heat being provided against by a packing of silicate cotton or
other bad conductor as at e; are cleaning plugs for the front headers H¹, and F¹
represents the usual refractory lining of the fire box. The flames and hot gases
pass upwards as indicated by the dotted arrows to an uptake arranged either as at U
or at one end of the casing E. Steam pipes and other fittings are arranged in the
usual manner.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
The improved construction of water tube steam generator substantially as above
docaribed in unfrunta the drawings
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The improved construction of water tube steam generator substantially as above
decoribed in reference to the drawings.
Dated this 8th day of November 1894.