Improvements in Steam Boilers.
Year: 1892

page_text: COMPLETE
Improvements in Steam Boilers.
1, HERBERT JOHN HADDAN, of the firm of Herbert & Co., Patent Agents,
f 18 Buckingham Street, Strand, W.C., London, Civil Engineer, do hereby
leclare the nature of this invention a communication to me from abroad by
ALLAN STIRLING, of New York, State of New York, United States of America,
Mechanical Engineer, and in what manner the same is to be performed to be
articularly described and ascertained in and by the following statement:-
1
This invention relates to certain improvements on that class of steam boilers in
which upper lying steam drums are connected by water tubes with lower lying
mud drums or drum, said improvements being pointed out in the following
Specification and claims and illustrated in the accompanying drawing in which,
Fig. 1 is a vertical section in the plane y y Fig 2.
Fig. 2 is a horizontal section in the plane a Fig. 1.
The letter A designates the mud drum and the letters A' A² the steam and
water drums which are connected with the mud drum by water tubes B' B*
respectively and with each other by steam pipes b' and water pipes b².
With these drums I have combined a feed drum A³ which connects with the mud
drum by water tubes B³ and with the steam and water drum A' by steam pipes .
The feed water is introduced into the feed drum A3 through the opening F.
W W is the brick setting, D is the fire brick arch of the furnace, C is the fire
partition provided with a shelf, E is another fire brick partition, d is a shelf
and M are the grate bars. As indicated by the arrows in Fig. 1 the flame on
striking the brick arch D is thrown between the water-tubes Bleading from the
drum A into the drum A¹ and the partition C compels the flame to ascend between
said water tubes and after it has passed the top edge of this partition, it descends
and as it strikes the shelf c it is compelled to pass down between the water tubes 13²
which lead from the drum A into the drum A², until it reaches the bottom edge of
the fire brick partition E when it passes up between the water tubes B which lead
from the drun A into the feed-drun A' said flame being compelled by the shelf d
pass between the tubes B³ before it can escape through the smoke stack S.
From this description it will be seen, that by means of the steam pipes 63 the
pressure in the feed water drum A³ is the same as that in the drums AA2 and the
feed water descends through tubes B and enters the mud drum A. in a heated state
and from this drum the water rises through the tubes B1 B2 into the druns A¹ A'
and it reaches these drums comparatively free from mud.
to
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. A water tube boiler consisting of a single mud drum A, two elevated steam
and water drums A' A' having their steam and water spaces respectively placed
in communication, the water tuber 13 B² extending from the mud drum to the
drums A A', the feed drum A³, the water tubes B³ extending from the mud
drum A to the feed drum and the pipes & connecting the feed drum with one of
the steam and water drums, substantially as described.
2. A water tube boiler consisting of a furnace structure, a single mud drum A,
the elevated steam and water drums A' A' having their steam and water spaces
respectively placed in communication, two sets of water tubes B¹ B' directly
connected at their upper ends with the steam and water drums and both sets
connected at their lower ends with the single mud drum, the feed drum A, the
water tubes B connecting the feed drum with the mud drum, the brick arch D

page_text: extending over the fire place from the wall of the furnace structure close to
the front set of water tubes B', the fire brick partition C inclined between the
two sets of water tubes B1 B2 and the fire brick partition E situated between
the water tubes B2 and B3, substantially as described.
Dated this 26th day of July 1892.
HERBERT & Co.,
Agents to Applicant