Improvements in Water Heaters for Steam Boilers.
Year: 1887

page_text: Date of Application, 17th Mar., 1887
Complete Left, 16th Dec., 1887
Complete Accepted, 20th Jan., 1888
PROVISIONAL SPECIFICATION.
Improvements in Water Heaters for Steam Boilers.
We, CHARLES ABRAHAM HAWORTH of the Grey Mare Engine Works, Grey Mare
Lane Bradford Manchester in the County of Lancaster Mechanical Engineer and
ISAAC MASON of Carrington in the County of Chester Engineer, do hereby declare the
nature of this invention to he as follows :-
This Invention relates to water-heaters for steam boilers and has for its object to
heat the water on its passage from the pump or injector to the boiler by the heat of
combustion of the fuel in the boiler furnace.
These Improvements consist in the construction and application of Water heaters
consisting of a pipe or pipes alone or in combination with suitable chambers or vessels,
the heater being applied to and contained within the furnace, fire box, or flue so as to
be immediately subject to the heat of combustion of the fuel therein.
Our Invention is more especially applicable to boilers of the locomotive type in
which case we remove the fire brick bridge and substitute therefor a chamber or
vessel constructed of copper iron steel or other suitable metallic plates so as to with-
stand the internal pressure to which it may be subjected. The chamber or vessel so
constructed and applied or adapted is connected by suitable pipes to the injector or
pump and to the boiler respectively in such a manner that the water from the injector
or pump must pass through the chamber on its way to the boiler. The inlet and outlet
pipes connecting the heater with the injector or pump and with the boiler may pass
through the front of the fire box in which case we previously insert therein two short
tubes of sufficient diameter and secure them to the plates on each side of the water
space. These short tubes then form openings through the front of the fire box for the
passage of the inlet and outlet tubes respectively and they may conveniently be
arranged one upon each side of the furnace door. The chatuber may additionally be

page_text: connected to the interior of the fire box or boiler by a direct tube or pipe and in the
passage so formed an automatic valve of ordinary construction is inserted to close the
passage when water is passing through the heater to the boiler and to permit it to open
when the pump or injector is at rest. This arrangement provides for continuous
circulation of water through the chamber.
In other boilers we arrange the water heater around or above the furnace within
the fire box or combustion chamber and construct it of pipes or tubes connected
respectively to the injector or pump and to the boiler as described for Locomotive
boilers.
The heater in this case may in a similar manner be directly connected with the
boiler by a valve controlled passage to secure constant circulation of water therein.
Dated the 16th day of March A.D. 1887.
WILLIAM E. HEYS,
Agent for Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Water Heaters for Steam Boilers.
We, CHARLES ABRAHAM HAWORTH of the Grey Marc Engine Works, Grey Mare
Lane Bradford, Manchester in the County of Lancaster Mechanical Engineer and
ISAAC MASON of Churchdown in the County of Gloucester Engineer, 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 heaters for steam boilers and has for its object to
heat the water on its passage from the pump or injector to the boiler by the heat of
combustion of the fuel in the boiler furnace.
These Improvements consist in the construction and application of water heaters
consisting of a pipe or pipes alone or in combination with suitable chambers or vessels,
the heater being applied to and contained within the furnace, fire box, or flue so as to
be immediately subject to the heat of combustion of the fuel therein.
Our Invention is more especially applicable to boilers of the locomotive type in
which case we remove the fire brick bridge and substitute therefor a chamber or
vessel constructed of copper iron steel or other suitable metallic plates so as to with-
stand the internal pressure to which it may be subjected. The chamber or vessel so
constructed and applied or adapted, is connected by suitable pipes to the injector or
pump and to the boiler respectively in such a manner that the water from the injector
or pump must pass through the heater on its way to the boiler. The inlet and outlet:
pipes connecting the heater with the injector or pump and with the boiler may pass
through the front of the fire-box in which case we previously insert therein two short
tubes of sufficient diameter and secure them to the plates on each side of the water
space. These short tubes then form openings through the front of the fire box for the
passage of the inlet and outlet tubes respectively and they may conveniently be
arranged one upon each side of the furnace door. The heater or fire box may
additionally be connected to the interior of the boiler by a direct tube or pipe and in
the passage so formed an automatic valve of ordinary construction is inserted to close
the passage when water is passing through the heater to the boiler and to permit it to
open when the pump or injector is at rest. This arrangement provides for continuous
circulation of water through the chamber.
In other boilers we arrange the water heater around or above the furnace within the
fire box or combustion chamber and construct it of pipes or tubes connected
respectively to the injector or pump and to the boiler as described for Locomotive
boilers. The heater in this case may in a similar manner be directly connected with
the boiler by a valve controlled passage to secure constant circulation of water therein.
Fig. 1. of the accompanying drawing represents in partial longitudinal section and
Fig. 2. in partial horizontal section the fire box of a locomotive having our Improve-
ments applied or adapted thereto. In each of the figures similar parts are denoted
by similar letters which are hereinafter employed for reference." A is the water
heating chamber; B is the tube or pipe conveying the feed water to the heater from

page_text: the injector or pump; C is the tube through which the water passes from the heater A
to the interior of the boiler; D is a tube to permit circulation of water through the
heater when the supply of feed water is cut off. The water circulates upwards through
the tube D, through the heater and thence to the boiler again through the tube C.
E is a valve to prevent the passage of the water in the reverse direction to that just
described; F is a short tube passing through the front of the fire box and secured
thereto in such a manner as to make a steam tight joint and to provide a clear passage
for the tube B from the interior of the fire box to the outside of the boiler. G is a
bearer or support for the water heater.
The water heater takes the place of the ordinary fire brick bridge in a locomotive
or similar fire box and performs all its functions.
We do not limit ourselves to the precise arrangement of the feed and circulating
tubes nor to the exact form or dimensions or position of the water heating chamber
illustrated by the accompanying drawings as these may be materially varied without
departing from our Invention. Thus, the tube may be brought through the front
of the fire box on the opposite side of the furnace door to the tube B and in a similar
manner, where it may be connected to an existing feed inlet to the boiler. The water
heater also instead of being constructed as a rectangular chamber may have its form
modified or it may consist of a series of parallel tubes having their ends opening into
a cross tube at each end; or, the parallel tubes may have their ends connected in
pairs thus The inner end of No. 1. is connected to the inner end of No. 2; the
outer end of No. 2. to the outer end of No. 3; the inner end of No. 3. to the inner
end of No. 4. and so on in such a manner that the tube No. 1 forms an extension of
the feed tube B and the last tube an extension of the tube C. By this arrangement
the series of parallel tubes forms a continuous tube returned upon itself in the same
plane several times. The parallel tubes should be laid as closely together as is
practicable and the spaces between them on the upper side may if desired be filled
with fire clay.
In boilers of all kinds in which a reverbatory bridge is in use, as in locomotive
boilers, our Improvements may be applied and arranged substantially as hereinbefore
described and as illustrated by the accompanying drawings.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what we
claim is :-
―
(1) A water heater for boilers; constructed and arranged substantially as herein-
before set forth and described.
(2) In Locomotive and similar boilers; a combined reverberator and water heater,
the water heater being constructed and arranged substantially as hereinbefore
described with reference to the appended drawings and being substituted for the
ordinary reverberatory arch or fire brick bridge.
Dated this 13th day of December A.D. 1887.
WILLIAM E. HEYS,
Agent for the Applicants.