Year: 1886

page_text: Date of Application, 1st Sept., 1886.
Complete Left, 27th May, .1887.
Complete Accepted, 28th June, 1887.
GEORGE GWINNETT, Buckingham Terrace, Plaistow, County of Essex, Engineer,
do hereby declare the nature of this invention to be as follows:-
The first part of this Invention relates to the Furnaces of Steam Boilers and has
for its object the more thorough combustion of the fuel employed for generating steam,
and the improvement consists in constructing a hollow bridge of fire brick, leaving a
grid or passages for air from the ash pit to the interior chamber of the bridge, where
such air becomes heated and passes thence through thoroughfares in the crown of the
bridge, where the heated air mixes with and effects a thorough combustion of the
smoke gases evolved from the fuel of the furnace. The thoroughfares in the crown of
the bridge by preference are made through a slab of fireclay which can be readily
removed and a new slab substituted without interfering with the working of the
boiler.
Secondly: The Invention relates to the mouth of the feed pipe from which the
water enters the boiler from the pump or injector.
Whatever means is at present employed for preventing incrustation in Steam
Boilers there is nothing which will effectually prevent the accumulation of lime
or stone choking up the passage in the end of the pipe when the water escapes
into the boiler, hence such passage in the pipes have to be cleaned and freed from
incrustation when the fire is out and the interior of the boiler can be entered.
Whereas according to my Invention such passage in the pipe can be cleansed at any
time whilst the steam is up. In carrying out this portion of my Invention I form
on the T piece, or feed pipe through which the water passes from the pump into the
boiler, a gland or stuffing box supporting a rod or pusher parallel with the axis of the

page_text: feed pipe entering the boiler, this rod when withdrawn is contained within the length
of the said gland and clear of the pipe through which the water passes into the boiler,
its interior end being by preference of a conical shape presenting its base towards the
end of the feed pipe. When the end of the feed pipe becomes clogged or choked
with lime or at any time during the time the boiler is at work, the end of a rod is
screwed into that end of the rod or pusher presenting itself flush with the aforesaid
gland, the said interior rod by this means is pushed forward, the conical end of which
by being repeatedly brought into forcible contact with the accumulated lime or stone
breaks and pushes the same out from the end of the pipe and so clears its passage for
the feed water.
Dated this 1st day of September 1886

page_text: Fig. 1.-represents a longitudinal section of the furnace of a Steam boiler shewing
the adaptation thereto of my improved construction of bridge and feed water pipe
cleaner, and
•
Fig. 2 represents an enlarged detail of the handle or pusher by which the pipe
cleaner is actuated.
In these Figs. a is the furnace; b the ash-pit, and c the bridge; the bridge c I
construct of fire bricks, leaving a hollow inside, and by preference I strengthen the
front of the bridge above the furnace bars with an interior lining of metal c¹. The
top or crown of the bridge is closed in with a slab d through which holes are formed
for the passage of air which enters through the grid e from the ash-pit 6 and escapes
in a heated state from the crown & where it mixes with, and assists the combustion
of the gases escaping from the furnace. The said slab d can be readily removed when
unfit for use and a new one replaced without interfering with the working of the
boiler.
Secondly. The feed water pipe finside the boiler is very liable to become choked
with incrustation; to prevent this I fix a gland g on the T head of the feed water
pipe through which the water from the pump or injector passes into the boiler, and
is so constructed that it contains a rod h with a conical head, the base of which is
equal in diameter to the bore of the pipe f. This rod / when withdrawn for the
passage of the water, is contained in the gland g, as shown, but when it is required

page_text: for use the rod h¹ shown enlarged at Fig. 2. is screwed on the end of the rod h. When
this extra length is thus added the conical head is pushed through the pipe f which
clears such pipe of any accumulation of incrustation or extraneous matter. This
cleansing action can be effected at any time whilst the boiler is at work, thereby
insuring at all times a clear passage for the water.
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
claim is :
1. The novel construction and adaptation to the fire bridges of the furnaces of
Steam Boilers of a hollow interior with passages for the ingress and egress of air in
the manner and for the purpose as herein substantially described set forth and
illustrated in the drawings.
2. The novel adaptation and employment in connection with the feed water pipes of
Steam Boilers of a gland and sliding pusher rod which will cleanse such feed water
pipe of incrustation in the manner substantially as described herein and illustrated in
the drawings annexed.