Improvements in Steam Generators.
Year: 1895

page_text: Date of Application, 1st July, 1895
Complete Specification Left, 25th Mar., 1896-Accepted, 2nd May, 1896
Improvements in Steam Generators.
ALLAN STIRLING 97 Queen Victoria Street, London E.C. Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to steam boilers of a kind having water tubes combined
with horizontal cylindrical shells or drums, and it comprises modifications of or
improvements on steam boilers such as are described in the British Patent
Specifications No. 13,614 of 1892.
In the practical working of such boilers I have discovered that the feed water
entering the back upper drum circulates more readily through some of the tubes
near the feed pipe to the lower drum, and does not circulate so readily through
the other tubes, and the object of the present invention is to provide suitable
arrangements for regulating the movement of the water through the tubes from
the back upper drum to the lower drun.
In carrying out the present invention detachable plugs or washers are placed in.
or on the ends of the tubes in the back upper drum. These plugs or washers have
openings through them of suitable size to regulate the movement of the water and
distribute it over the tubes. One washer may be used to cover two or more tubes
or two or more plugs may be connected together. The plugs or washers may be
arranged to be moved from the outside of the drum so as to permit the regulation
of the openings when the boiler is closed.
This invention may also be applied to steam boilers such as are described in the
Specification for British Patent No. 13,733 of 1894, and also to steam boilers
evaporators or coolers in which fluid passes through tubes.
Dated this First day of July 1895
ALLAN STIRLING.
ALLAN STIRLING 97 Queen Victoria Street, London, E.C. 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 :-
This invention relates to steam generators of a kind having water tubes combined
with horizontal cylindrical shells or drums, and it comprises an improvement on
steam generators such as are described in the British Patent Specification No. 13,614
of 1892 and No. 13,733 of 1894.
In the practical working of such generators I have discovered that the feed
water circulates more readily through the tubes near the feed pipe and does not
circulate so readily through the other tubes, and the object of the present invention
is to provide suitable arrangements for regulating the movement of the feed water
through the tubes.

page_text: The improvement which constitutes the invention is pointed out in the following
Specification and claim and illustrated in the accompanying drawing in which
Figure 1 represents a plan or view showing the parts in position.
Figure 2 is a section through a. a. in Figure 1.
In this drawing the letter A designates the plate in which the tube B. is fixed.
C is the plug or washer which may be of any convenient form & which has an
opening D. through it. This opening D. being made of suitable size to regulate
the movement of the water in the tube. One washer may be used to cover two
or more tubes, or two or more plugs may be connected together. The plugs or
washers may be arranged to be moved from the outside of the drum so as to
permit the regulation of the openings when the boiler is closed.
Having now particularly described & 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.
In steam generators such as are described in British Patent Specification
No. 13,614 of 1892, and No. 13,733 of 1894, the combination with the tube B.
and plate A. of the plug C. substantially as described.
Dated this 18th day of March 1896.
ALLAN STIRLING.