Year: 1896

page_text: I, ALBERT EDWARD SEATON, of Wilton House, Holderness Road, Hull, in the
County of York, Civil and Mechanical Engineer and Naval Architect, do hereby
declare the nature of this Invention to be as follows:---
Amongst the most effective Boilers of the Water Tube type are those which are
constructed with a cylindrical steam receiver placed in a central position above
two water drums, which water drums are connected to the steam receiver by rows
of tubes placed diagonally to the right and left of the receiver so as to keep the
water drums and the tubes at their lower ends wide enough apart to admit of a
fire grate of proportionate size being placed between them.
The object of my Invention is to reduce the weight and to simplify the con-
struction of Boilers of this type, so as to render them specially applicable where
extreme lightness is necessary, as in Steam Launches and other light craft, Motor
Cars and the like purposes.
I effect these objects in the following manner,
I dispense entirely with the water drums herein previously referred to, and on
each side of a Horizontal Cylindrical Steam receiver I fit and arrange a series of
elements, each consisting of a Tube bent into the form of an elongated loop, both
ends of which tube being secured into the plate of the steam receiver, in such a
manner that the outer member becomes a downcast, whilst the inner member, which
is exposed to the fire is the upcast, whereby continuous and almost perfect circu-
lation is maintained.
These elements are placed in two rows, one row on each side the receiver, so as
to form a furnace or fireplace between them.
In some cases, I form the loop, so that both ends are secured to the steam receiver
on the same side of the vertical centre line, and in some cases I form the loop so that
one end is secured on one side of the vertical centre line, and the other end on the
other side and again, in some cases I arrange the elements so as to form a com-
bination of both methods herein last described, but in any of these arrangements
of the ends of the elements I always provide that the upcast member of the loop
shall be the longest, so that its end may be secured into the receiver plate above the
water level in order to do which, I bend it into a swan neck curve, the downcast
member of the loon having its end secured into the plate of the receiver near the
bottom, and below the water level. In this way, the portion of the upcast mem-
bers below the receiver, are arranged to form a water wall next the fire, so that the
heat thereof does not pass directly into the spaces btween the inner and outer
members of the elements, the outer members being thereby prevented from be-
coming so hot as to interfere with the circulation.
From the foregoing it will be understood that in any of the arrangements of the
elements herein described, the upcast members when they approach the underside
of the steam receiver, cross the downcast members, either on one side or the other
and from such point are conducted upwards in a.swan neck curve to the upper part

page_text: of the steam receiver, in such a manner as to leave a flue space or spaces, between
the curved parts of the upeast members, and the walls of the receiver, the hot gases
pass from the firegrate through the interstices of the tubes under the centre of the
steam receiver spread out on either side in the flue space already referred to, and
travel longitudinally to a funnel at one end, the short circuit of the hot gases to
the funnel I prevent by the insertion of baffles at the back at the crossing of the
tubes, and when necessary, I protect by a shield of refractory substance, the short
length of the downcast member, which by the arrangement here described, is for a
short distance exposed to the flame and heated gases. I also sometimes effect this
object of shielding the exposed part of the downcast tube by inserting a longitudinal
screen provided with gas ports, between such of the exposed members as may be
necessary to give the desired area for the passage for the gases.
In some cases I fit a pap to the lower extremity of the loop of each member to
permit of a screw plug being inserted, the removal of which plug affording the
means of draining and cleaning the tubes if necessary.
The elements and receiver herein described, I provide with a suitable casing,
firegrate and mountings, similar to those employed in other Water Tube Boilers of
this type.
Dated this 22nd day of September 1896.
R. HEBER RADFORD,
Agent for the Applicant.
COMPLETE SPECIFICATION:
Improvements in Water Tube Steam Boilers.
I, ALBERT EDWARD SEATON, of Wilton House, Holderness Road, Hull, in the
County of York, Civil and Mechanical Engineer and Naval Architect, do hereby
declare the nature of my said Invention and in what manner the same is to he
performed to be particularly described and ascertained in and by the following
statement:-
Amongst the most effective Boilers of the Water Tube type are those which are
constructed with a cylindrical steam receiver placed in a central position above
two water drums, which water drums are connected to the steam receiver by rows
of tubes placed diagonally to the right and left of the receiver so as to keep the
water drums and the tubes at their lower ends wide enough apart to admit of a
fire grate of proportionate size being placed between them."
The object of my Invention is to reduce the weight and to simplify the con-
struction of Boilers of this type, so as to render them specially applicable where
extreme lightness is necessary, as in Steam Launches and other light craft, Motor
Cars and the like purposes.
I effect these objects in the following manner,
My invention will be better understood on reference to the accompanying two
sheets of Drawings in which,
Fig. 1. Sheet 1. is a vertical section of one of my improved Water tube steam
boilers in which tubes forming the loops or elements have one end secured to the
steam receiver on one side of the vertical centre line and the other end of the same
on the other side and vice versa.
Fig. 2. Sheet 1. is a similar section in which the tubes forming the loops or
elements have both ends secured to the steam receiver on the same side of the
vertical centre line.
Fig. 3. Sheet 2. shews the elements arranged so as to form a combination of both
the methods shewn in Figs. 1 and 2, Sheet 1.

page_text: Fig. 4 being a side elevation of the same.
The same letters refer to similar parts throughout the several views.
I dispense entirely with the water drums herein previously referred to, and on
each side of a Horizontal cylindrical steam receiver, A, I fit and arrange a series
of elements, B, 13, each consisting of a tube bent into the form of an elongated
loop, both ends of which tube being secured into the plate of the steam receiver, A,
in such a manner that the outer members, B', B', becomes the downcast, whilst
the inner members, B, B, which are exposed to the fire become the upeasts, whereby
continuous and almost perfect circulation is maintained.
These elements are placed in two or more rows, one row or inore on each side the
receiver, so as to form a furnace or fireplace, C, hetween them.
In some cases, I form the loop, so that hoth ends are secured to the steam
receiver, on the same side of the vertical centre line, as shewn in Fig. 2, Sheet 1,
and in some cases I form the loop so that one end is secured on one side of the
vertical centre line, and the other end on the other side as shewn in Fig. 1. Sheet 1.
and again, in some cases I arrange the elements so as to form a combination of both
methods herein last described, as shown in Figs. 3, and 4, Sheet 2. but in any of
these arrangements of the ends of the elements I always provide that the upeast
member, B, of the loop shall be the longest, so that its end may be secured into
the receiver plate above the water level, in order to do which, I bend it into a
swan neck curve, the downcast member, B1, of the loop having its end secured into
the plate of the receiver near the hottom, and below the water level. In this way,
the portion of the upcast members, helow the receiver, are arranged to, form a
water wall next the fire, so that the heat thereof does not pass directly into the
spaces between the inner and outer members of the elements, the outer members
being thereby prevented from hecoming so hot as to interfere with the circulation.
From the foregoing it will be understood that in any of the arrangements of the
elements herein described, the uncast members when they approach the underside
of the steam receiver, cross the downcast members, either on one side or the other
and from such point are conducted upwards in a swan neck curve to the upper part
of the steam receiver, in such a manner as to leave a flue space or spaces, D,
between the curved parts of the upcast members, and the walls of the receiver, the
hot gases pass from the firegrate through the interstices of the tubes under the
centre of the steam receiver spread out on either side in the flue space already
referred to, and travel longitudinally to a funnel, E, at one end, the short circuit
of the hot gases to the funnel I prevent by the insertion of baffles at the back at
the crossing of the tubes, and when necessary, I protect by a shield of refractory
substance, F, the short length of the downcast member, which hy the arrangement
here described, is for a short distance exposed to the flame and heated gases. I
also sometimes effect this object of shielding the exposed part of the downcast tube
by inserting a longitudinal screen provided with gas ports, between such of the
exposed members as may be necessary to give the desired area for the passage for
the gases.
In some cases I fit a pan, G, to the lower extremity of the loop of each member
to permit of a screw plug heing inserted the removal of which plug affording the
means of draining and cleaning the tubes if necessary.
The elements and receiver herein described, I provide with a suitable casing. I.
firearate, I, and mountings, similar to those employed in other Water Tube Boilers
of this type.
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. In a Steam Boiler of the Water Tube Type, the arrangement and combina-
tion of parts and appliances comprising an horizontal cylindrical steam receiver
fitted with a series of elements each consisting of a tube bent into the form of a loop
both ends of which are secured into the plate of the steam receiver in a row or in

page_text: rows on each side of the said receiver and so as to form a furnace or fire place
between them, in the manner and for the purposes substantially as herein described
and illustrated.
2. In a Steam Boiler of the water tube type the arrangement and combination
of parts and appliances as described in Claim 1. The loops or elements thereof
being so formed and arranged that both ends of each loop are secured to the steam
receiver on the same side of the vertical centre line, in the manner and for the
purposes substantially as herein described and illustrated in Fig. 2 (Sheet 1) of the
accompanying drawings.
3. In a Steam Boiler of the water tube type, the arrangement and combination
of parts and appliances as described in Claim 1. The loops or elements thereof
being so formed and arranged that one end of each loop is secured to the steam
receiver on one side of the vertical centre line and the other end of the same loop
is secured on the opposite side of the said steam receiver in the inanner and for
the purposes substantially as herein described and illustrated in Fig. 1, (Sheet 1) of
the accompanying drawings.
4. In a Steam Boiler of the water tube type, the arrangement and combination
of parts and appliances as described in Claim 1. The loops or elements thereof
being so formed and arranged as to constitute a combination of both the methods
described in Claims 2, and 3, in the manner and for the purposes substantially as
herein described and illustrated in Figs. 3, and 4, (Sheet 2) of the accompanying
drawings.
Dated this 1st day of June 1807
R. HEBER RADFORD,
Agent for the Applicant.