Improvements in Steam Boilers.
Year: 1891

page_text: Date of Application, 17th July, 1891
Complete Specification Left, 17th May, 1892-Accepted, 18th June, 1892
PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers.
I, JOHN GAMGEE of 6 Lingfield Road, Wimbledon, in the County of Surrey,
Gentleman, do hereby declare the nature of this invention to be as follows:-
My invention consists of improvements in steam boilers and has special
reference to boilers such as those of the Cornish and Lancashire type which
have one or more internal longitudinal flues through which the flame and hot
gases pass on their way from the furnace to the chimney. The object of the
invention is to cause and maintain a rapid circulation of the water in the boiler
in such manner that continuous streams flow from below the flue or flues or
from the lower part of the boiler and are discharged at high velocity through
passages of gradually decreasing sectional area above the level of the main body
of water in an approximately horizontal direction.
With this object I place upon the boiler flue a series of water circulating
saddles each of which encloses a space between itself and the flue. The saddle
ig open at bottom to allow water to enter into the said space and terminates at
top in one or more, preferably two passages, of gradually decreasing sectional area,
the two passages (when there are two) by preference pointing in diametrically
opposite directions. The water from the lower part of the boiler continually
rushes up between the saddle and the flue and is discharged in an approximately
horizontal direction above the level of the main body of water.
The two passages can be separated by a V-shaped piece which forms one side of
the upper part of each of them, and the saddles can be constructed in halves
which are secured together by bolts and nuts, the bolts passing through lugs on the
saddles.
According to a further part of my invention I construct the water circulating
saddles with the two passages at some distance apart so that the respective deliveries
therefrom may take place further apart and at a greater distance from the flue.
This is effected by means of a separating piece. The saddle is in this case made
in pieces which are adapted to be readily fixed together by bolts and nuts after
such pieces have been introduced separately into the boiler through a manhole.
There are four pieces viz.-two pieces each of which forms one side of the saddle
and the outer half of the corresponding discharge passage, and two pieces each of
which forms one half of the top of the separating piece and the inner half of the
corresponding discharge passage.
When the water circulating saddles are required for boilers having two flues,
that is to say, a lower flue and an upper return flue they are modified in form or
configuration so as to enable them to be adapted to both flues.
Dated this 16th day of July 1891.

page_text: COMPLETE SPECIFICATION.
Improvements in Steam Boilers.
I, JOHN GANGEE of 6 Lingfield Road, Wimbledon in the County of Surrey,
Gentleman, 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 consists of improvements in steam boilers and has special reference
to boilers such as those of the Cornish and Lancashire type which have one or more
internal longitudinal flues through which the flame and hot gases pass on their way
from the furnace to the chimney. The object of the invention is to cause and
maintain a rapid circulation of the water in the boiler in such manner that
continuous streams flow from below the flue or flues and are discharged at high
velocity through passages of gradually decreasing sectional area above the level of
the main body of water in an approximately horizontal direction
With this object I place upon the boiler flue a series of saddles each of which
encloses a space between itself and the flue. The saddle is open at bottom to allow
water to enter into the said space, and the saddle terminates at top in one or more,
preferably two, passages of gradually decreasing sectional area, the two passages
(when there are two) by preference pointing in diametrically opposite directions.
The water from the lower part of the boiler continually rushes up between the
saddle and the flue and is discharged in an approximately horizontal direction above
the level of the main body of water.
Figure 1 of the accompanying drawings is a transverse section of a boiler
constructed in accordance with my invention.
Figure 2 is a longitudinal elevation of a portion of same, the outer shell being in
section.
a is the outer shell and the internal flue, ce are the saddles each of which
encloses a space dd between itself and the flue. Each saddle terminates at top in
two passages ee of gradually decreasing sectional area, and having outlets or
mouths which discharge the water in an approximately horizontal direction
above the level of the main body of water in the boiler. The two passages e e are
divided by the V-shaped part k. The saddles with the passages e e are shown as
constructed in halves which are secured together by bolts and nuts h h, the bolts
passing through lugs ii, each half comprising one side of the saddle and one half
of the V-part k.
My invention further consists in constructing water circulating saddles in the
manner shown in Figures 3 and 4, where the two passages ce are placed at some distance
apart so that the respective deliveries therefrom may take place further apart and at a
greater distance from the flue. This is effected by means of the separating piece k.
The saddle is in this case made in pieces which are adapted to be readily fixed
together by bolts and nuts after such picces have been introduced separately into
the boiler through a manhole. It will be seen that there are four pieces, viz.-
two pieces each of which forms one side of the saddle c and the outer half of the
corresponding discharge passage e; and two pieces each of which forms one half of
the top of the separating piece k and the inner half of the corresponding discharge
passage e.
boiler
Figures 5 and 6 represent the water circulating saddles shown in Figures 3 and 4
modified in form so as to enable them to be suitably fitted to the flues of
having a lower flue b and an upper return flue 6'. The construction will be clearly
understood from the figures without further explanation.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
:-
1. In a steam boiler having one or more internal flues, a series of saddles each
of which encloses a space between itself and the flue, the said saddle being open at
bottom, and terminating at top in one or more outlet passages of gradually decreasing
sectional area which discharge the water in continuous streams in an approximately
horizontal direction above the level of the main body of water in the boiler,
substantially as set forth.
2. The several constructions of water circulating saddles for internal flue boilers,
hereinbefore described and represented in the accompanying drawings.
Dated this 17th day of May 1892.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.