Year: 1887

page_text: Date of Application, 7th Nov., 1887
Complete Specification Left, 7th Aug., 1888
Complete Specification Accepted, 7th Sept, 1888
I, JAMES SMITH, 50 Brougham Street, Greenock, in the County of Renfrew,
Consulting Engineer and Marine Surveyor, do hereby declare the nature of this
Invention to be as follows:-
This Invention which relates to improvements in feed water heaters has for its
object to so construct, connect and apply such vessels that the feed water after being
discharged from the feed pump and before mixing with the water in the boiler is
greatly increased in temperature, the improved apparatus also acting to trap or prevent
the passage into the boiler of sludge or sediment contained in the feed water and to
promote the circulation and warming of the water in the boiler when steam is being
got up.
The apparatus constituting the Invention consists of a vessel of cylindrical, oval or
other form having at its interior a series of tubes which are open at their extremities
to the water or steam space of the boiler and are secured in tube plates constituting
the ends of the vessel. These tubes may either be straight throughout their lengths
or they may be waved or scrolled and their surfaces may as well as those of the vessel
itself be plain or corrugated.
The vessel is placed within the boiler either horizontally, vertically or diagonally
At one end it has
and it may be attached to the shell, stays or other convenient part.
connected to it discharge branches or pipes communicating between the space
surrounding the tubes within the vessel and the water spaces of the boiler and these
discharge branches or pipes being open ended the pressure externally and internally
of the vessel is equilibriated.
The feed water from the pump is forced into the heater through a pipe or pipes at
the opposite ends from the discharge branches or as an alternative arrangement the
feed water may be forced into a recess or chamber made at one end of the heater
passing thence through the tubes to a like chamber at the opposite end in which case
the steam to heat the feed water is conducted into the space surrounding the tubes in
the vessel through any suitable connection the water of condensation being returned
through the heater tubes or by injector.

page_text: In either case the capacity of the feed water heater is in excess of the fill of the
feed pump so that any sediment contained in the feed water has time to settle in the
heater and is from time to time blown off through a sludge or drain cock connected
by a pipe to the bottom of the vessel.
Under the Invention to promote the circulation whilst raising steam in the main
boiler a connection is made with the donkey boiler through which a quantity of steam
may be injected to mix with the water being circulated in the main boiler by the
auxiliary feed engine or by injector or other means.
In working with the apparatus a quantity of air or gas will arise from the feed
water in the heater and prevent the feed water reaching the upper part thereof. To
regulate the quantity of air and consequently the water level an air pipe is led through
the shell of the boiler and connected to the upper part of the heater, the outer end of
the pipe having a stop valve convenient to the engine starting platform.
Dated this Fifth day of November 1887.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Feed Water Heaters and Circulators.
I, JAMES SMITH, 50 Broughain Street, Greenock, in the County of Renfrew
Consulting Engineer and Marine Surveyor, 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 which relates to improvements in feed water heaters has for its
object to so construct connect and apply such vessels that the feed water after being
discharged from the feed pump and before mixing with the water in the boiler is
greatly increased in temperature the improved apparatus also acting to trap or prevent
the passage into the boiler of sludge or sediment contained in the foed water and to
promote the circulation and warming of the water in the boiler when steam is being
got up.
As represented on the accompanying drawings, in elevation at figure 1 and as fitted
in a marine boiler on figures 2 and 3, the apparatus constituting the Invention consists
of a vessel A of cylindrical, oval or other form having at its interior a series of
tubes B which are open at their extremities to the water or steam space C of the
boiler and are secured in tube plates A¹ constituting the ends of the vessel.
These
tubes B may either be straight throughout their lengths or they may be waved or
scrolled and their surfaces may as well as those of the vessel itself be plain or
corrugated.
The vessel is placed within the boiler either horizontally, vertically or diagonally
and it may be attached to the shell, stays or other convenient part. At one end it has
connected to it discharge branches or pipes D, D communicating between the space
surrounding the tubes B within the vessel and the water spaces of the boiler and
these discharge branches or pipes D being open ended the pressure externally and
internally of the vessel is equilibrated.
The feed water from the pump is forced into the beater A through a pipe or pipes E
at the opposite ends from the discharge branches D or as an alternative arrangement
the feed water may be forced into a recess or chamber made at one end of the heater
passing thence through the tubes to a like chamber at the opposite end in which case
the steam to heat the feet water is conducted into the space surrounding the tubes in
the vessel through any suitable connection the water of condensation being returned
through the heater tubes or by injector.
In either case the capacity of the feed water heater is in excess of the fill of the
feed pump so that any sediment contained in the feed water has time to settle in the
heater and is from time to time blown off through a sludge or drain cock F connected
by a pipe G to the bottom of the vessel A.
Under the Invention to promote the circulation whilst raising steam in the main
boiler a connection is made with the donkey boiler through which a quantity of steam
may be injected to mix with the water being circulated in the main boiler by the
auxiliary feed engine or by injector or other means.

page_text: In working with the apparatus a quantity of air or gas will arise from the feed
water in the heater and prevent the feed water reaching the upper part thereof. To
regulate the quantity of air and consequently the water level an air pipe H is led
through the shell of the boiler and connected to the upper part of the heater,
the outer end of the pipe having a stop valve convenient to the engine starting
platform.
Having now particularly described and 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
A feed water heater and circulator constructed and applied substantially as herein
described with reference to the drawings annexed.