Year: 1896

page_text: I, JOHN GILMOUR of 2 Holmhead Terrace, Cathcart, Renfrewshire, Boiler Maker,
do hereby declare the nature of this invention to be as follows:-
This invention relates to water tube boilers and it has for its object to improve
their construction by so designing the boiler that any of its tubes which may be
damaged or become leaky can be removed or replaced without the necessity of
drawing the fire or letting down the steam.
The invention inay be carried out in various ways but I prefer to make the boiler.
with sections of tubes any one of which can be inserted in place or removed at
pleasure without interfering with the action of the other sections.
The invention can be adapted to both marine and land boilers and whether of the
vertical or horizontal types.
In a vertical boiler, for example, I prefer to divide the water tubes into four (or
other number) sections or groups each of which is connected to the tube plate of a
corresponding removable steam chest or box secured to the outer shell. The water
tubes of each section are doubled or looped and preferably extend downwards
in the form of a curve passing through openings in the inner shell or fire box of the
boiler. When the steam chests are fitted in place their water tubes form an
inner ring of somewhat inverted conic shape projecting downwards in the fire box.
Each steam chest is connected by means of pipes and cocks with the interior
steam (or water) space of the boiler. These pipes are capable of being jointed and
disjointed when desired and the cocks are capable of opening up or cutting off.
communication between any of the steam chests and the boiler.
Each steam chest is preferably provided with an exhaust pipe and cock.
The sections may be made any desired size.
Each double tube may, if necessary, be connected with the steam (or water) space
of the boiler independently of the others and be capable of being removed by
itself. In this case each tube would have separate cocks and connections.
Two or more series of tubes may be arranged above or beside each other.
When it is desired to remove or renew any tube the steam chest to which it.
belongs is first isolated by means of the cocks and pipe connections and then removed
along with its tubes from the boiler so that the damaged tube can be changed. After
the damaged tube has been replaced the steam chest is again fitted in place in the
boiler.
With this invention steam can always be kept up in the boiler whilst any tube
is being replaced or repaired.
This invention obviates the necessity of using an auxiliary boiler in the event of a
break down of the water tubes of the main boiler.
Dated this 10th day of November 1896.

page_text: Improvements in water Tubе Bоllеrs.
I, JOHN GILMOUR, of 2 Holmhead Terrace, Cathcart, Renfrewshire, Boiler Maker,
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 water tube boilers and it has for its object to improve
their construction by so designing the boiler that any of its tubes which may be
damaged or become leaky can be removed or replaced without the necessity of
drawing the fire or letting down the steam.
The invention may be carried out in various ways but I prefer to make the boiler
with sections of tubes any one of which can be inserted in place or removed
whenever desired without interfering with the action of the other sections.
The invention can be adapted to both marine and land boilers whether of the
vertical or horizontal types.
And in order that my said invention may be properly understood I have hereunto
appended two explanatory sheets of drawings which show, by way of example, a
small vertical boiler constructed in accordance with my invention.
Fig. 1 is a vertical section of the boiler. In this view some of the tubes a are
broken off for clearness.
Fig. 2 is a sectional plan on the line x-x Fig. 1.
Fig. 3 is a side elevation of the boiler.
Fig. 4 is a view of a chest c.
Figs. 5 and 6 are detail views.
Figs. 7 and 8 show in side view and section a slight modification.
Referring to the drawings whereon the same reference letters wherever repeated
indicate the same or similar parts.
In a vertical boiler, such as that shown, I prefer to divide the water tubes into
four or other number of sections or groups, the tubes of each group being fitted in
the tube plate of a removable chest or box c secured to the outer shell d of the
boiler. The water tubes a of each section are doubled or looped, as shown, and,
preferably, extend downwards in the form of a curve passing through openings e in
the inner shell or fire box f of the boiler. When the four chests c are fitted in
place their water tubes a form an inner ring of a somewhat inverted conic shape
projecting downwards in the fire box and into the fire.
Each chest c is connected by means of pipes g, g', and cocks h, h', with the interior
water space of the boiler. These pipes g, g', are capable of being jointed and
disjointed when desired and the cocks h, h¹, are capable of opening up or cutting off
communication between the chests and the boiler. The chests are each divided by
a central partition j into two compartments the upper one k communicating with the
pipe g and the lower one ke with the pipe g¹.
Each chest is preferably provided with an exhaust pipe and cock l¹.
The chests c may be made of any desired size and so as to contain one doubled
tube only or two, four, or other number of doubled tubes.
Each doubled tube inay, if necessary, as shown at Figs. 7 and 8, be connected with
the water space of the boiler independently of the others and be capable of being
removed by itself. In this case each tube would have a small chest c of its own
and be provided with separate cocks h, h¹, and pipe connections g, g, l. The chests.
with their pipes would be arranged all round the boiler in either one or two tiers.
The spaces e through which the tubes a pass are enclosed by plates e² so as to
prevent water gaining access to the fire through the openings e of the fire box.

page_text: As shown at Figs. 1 and 4 two looped tubes a may be arranged one within the
other.
When it is desired to remove or renew any tube the chest to which it belongs is
first isolated by closing the cocks h h¹, of the pipe connections g g', and water in the
chest is then drawn off by the pipe ; thereafter the chest is removed along with
its tubes a from the boiler so that the damaged tube can be repaired or changed.
The opening left in the boiler shell after the removal of the chest is closed by a lid
or cover m such as shown in front and side views at Figs 5 and 6. This cover
prevents the flames coming out of the fire box through the opening e. After the
damaged tube has been repaired or replaced the chest can be again fitted in place in
the boiler.
With this invention steam can always be kept up in the boiler during the time
any tube is being replaced or repaired.
This invention obviates the necessity for using an auxiliary boiler in the event of
a break down of the water tubes of the main boiler.
The water in the boiler circulates through the pipe g¹ to the lower compartment
of each chest c then down that part of the tubes a connected with this
compartment, then back through that part of the tubes a connected with the
upper compartiment, finally entering the boiler again by the pipe g.
If desired in some eases two or more rows of chests c and tubes a can be fitted in
the boiler.
The chests are or may be cast.
The boiler is fitted with the usual safety valve, gauge, and other appurtenances.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I consider novel and desire to claim is :-
1. The construction or the arrangement and combination of parts of the
water tube boiler, substantially as herein before described and shown on the drawings
annexed.
2. A water tube boiler having water tubes (a) communicating with chests (c)
which are removable, substantially as herein before set forth.
Dated this 10th day of August 1897.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.