New or Improved Water Tube Steam Generator.
Year: 1895

page_text: Date of Application, 31st Dec., 1895
Complete Specification Left, 27th Oct., 1896-Accepted, 28th Nov. 1896
PROVISIONAL SPECIFICATION.
New or Improved Water Tube Steam Generator.
I, FRANK GEORGE HAMPSON, of 2 Christchurch Street, East Greenwich, in
the County of Kent, Mechanical Engineer, do hereby declare the nature of this
invention to be as follows:-
My invention has for its object a steam generator of the water-tube variety,
having large heating surface and consequent steam generating capacity, and of
such construction as to facilitate inspection and repair.
This construct of two horizontal or approximately horizontal rows of tubes
arranged one above the other, with a suitable space intervening, and connected
together by a number of smaller tubes each of which is so bent that it either
resembles a number of curved portions connected together end to end, or to an
intervening straight portion, so as to form a serpentine line, so that each curve
lies in the same plane as those next it, but is in the opposite direction thereto, or
said tubes may be bent to form spiral coils.
These smaller tubes may in either case be placed relatively to one another as
found most suitable, but where bent to form serpentine lines they are preferably
arranged in double or single rows, each single or double row connecting one tube
of one of the horizontal rows with that in the other horizontal row immediately
opposite it, and in each case those tubes of one row are so arranged relatively to
those of the other row that the curves of the one either coincide or cross those of
the other, the coinciding or crossing occurring throughout the whole mass, or in
respect only of each pair of rows, whether these pairs connect one or two pairs of
horizontal pipes.
Where bent to form spiral coils, these tubes may be arranged singly, or in
clusters of two, three, four, or more, in the latter case the arrangement being
such that the coils of one tube interwind with those of the other, or others.
The feed water is supplied to the bottom row of horizontal pipes through a
pipe connected to their front ends, or at any other convenient point, whilst when
found desirable the back, or front, or both ends of the two horizontal rows may be
connected by other vertical tubes of suitable diameter and the upper row connected
to one or more conveniently situated steam drums.
The connection between the horizontal pipes and the smaller vertical tubes may
be effected by expanding the ends of the latter into the former, or in any other
well known manner, but I preferably effect this by the aid of a screw union formed
of externally screw threaded collars fitting loosely on the smaller tubes and
engaging with flanges formed on the ends of these tubes These collars screw into
the larger ends of reducing nipples, screwed into the horizontal tubes, in such
manner that the faces of the flanges on the smaller tubes are pressed against the
shoulders in the interior of the nipples, these shoulders and the faces of the flanges
being preferably so shaped that a knife joint will result.
Dated this 27th day of December 1895.
CASTLE SMITH,
"Invention" Office, Mitre Court, Fleet Street, London, E.C.,
Agent for the Applicant.

page_text: New or improved Water Tube Steam Generator.
I, FRANK GEORGE HAMPSON of 2 Christchurch Street, East Greenwich, in
the County of Kent, Mechanical 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 :-
My invention has for its object a steam generator of the water tube variety
having a large heating surface and correspondingly large steam generating capacity,
and of such construction as to facilitate inspection and repair.
I construct my improved steam generator of a series of removable elements
arranged vertically side by side within a case, and connected at top and bottom
respectively with collecting and supply pipes which communicate with the necessary
feed pumps and steam drum or drums.
In the accompanying drawings which illustrate by way of example one
construction of my improved boiler,
Figure 1 is an elevation of the front of the boiler a portion of the casing being
broken away to show the internal construction.
Figure 2 is a side elevation, a portion of the casing being similarly broken
away.
Like letters indicate like parts throughout the drawings.
Across the casing A run two tubes B and C, the lower one of these B being
that into which the feed is introduced while the upper one C collects the steam
and conveys it to the steam drum D. The tube B is provided with a series of
upwardly directed openings provided with flanges B¹. The tube C is provided
with a similar number of openings which face towards the front of the boiler,
these openings being likewise provided with flanges C¹; these flanges B' and C¹
serve for the connection of the several elements to the pipe B and C.
The elements which form the main portion of my improved boiler each comprise
upper and lower tubes which in the example illustrated are approximately
horizontal and are connected by suitably shaped smaller water tubes. The front
end of the upper of these tubes E is curved round as at E¹ and provided with
flange E³, by means of which it is bolted to one of the flanges C' of the tube C.
The lower tube F is provided at its under side with an opening and a flange F¹ by
means of which it is bolted to one of the flanges B' of the tube B. Each element
preferably has a double row of smaller water tubes G, these may be bent as shown
in Figure 1 to serpentine form, the tubes of one row being so arranged relatively
to those of the other row that the curves of the one cross those of the other.
If desired a downcomer tube H may form part of each element connecting the
hinder ends of the horizontal tubes E and F. It will thus be seen that each
individual element situated vertical in the boiler may, after disconnection with the
tubes C and B, be drawn straight out from the front of the boiler, the doors A¹ of
the casing being of sufficient size to allow of this.
The joints connecting the ends of the small water tube G to the horizontal
tubes E and F may be of such construction or design as found convenient.
The tubes E and F may if desired be inclined instead of horizontal and the
former may be connected to the steam drum without the intervention of a
collecting pipe.
For convenience for removal of the elements they may each be suspended or
rest upon one or more rollers which run upon guide bars ranged horizontally
over or below each element.
If desired the tubes G may be bent to some other suitable form such as spiral
coils which may intertwine with one another.

page_text: Having now particularly described and ascertained the nature of the said.
invention and in what manner the same is to be performed I declare that what.
I claim is :-
1. In a steam generator the combination with a steam drum or collecting tube of
removable elements each comprising an upper and a lower horizontal tube connected.
by vertical serpentine tubes together with or without a downcomer tube.
2. In a removable element for a steam generator the combination with upper
and lower tubes such as E and F serpentine coiled or otherwise bent tubes such
as G with or without a downcomer tube.
3. In a steam generator the combination with a casing of tubes such as B and C
elements each comprising tubes such as E and F bent tubes G and downcomer H
substantially as described and illustrated in Figures 1 and 2 of the accompanying:
drawings.
Dated this 26th day of October 1896.
BOULT & WADE,
Agents for the Applicant.