IMPROVED ARRANGEMENTS OF APPARATUS FOR SUPERHEATING STEAM
Year: 1858

page_text: LETTERS PATENT to Andrew Lamb and William Alltoft Summers, both of
Southampton, in the County of Hants, Engineers, for the Invention of
"IMPROVED ARRANGEMENTS OF APPARATUS FOR SUPERHEATING STEAM."
Sealed the 7th June 1859, and dated the 8th December 1858.
PROVISIONAL SPECIFICATION left by the said Andrew Lamb and
William Alltoft Summers at the Office of the Commissioners of Patents,
with their Petition, on the 8th December 1858.
We, ANDREW LAMB and WILLIAM ALLTOFT SUMMERS, both of Southampton,
in the County of Hants, Engineers, do hereby declare the nature of the said
Invention for "IMPROVED ARRANGEMENTS OF APPARATUS FOR SUPERHEATING STEAM,"
to be as follows:-
The object of our Invention is to divide the steam to be superheated into as
thin films or streams as may be, in order to get the whole quantity composing
such films or streams quickly, thoroughly, and economically superheated. We
pass the steam through thin channels or ways arranged cylindrically, spirally,
or parallel to each other, or in any other suitable direction in the flues, smoke_
space, uptake, or chimney. Our Invention applies especially to those boilers

page_text: known as Lamb and Summers' patent flue boilers, but is also applicable to
other steam boilers.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Andrew Lamb and William Alltoft Summers in the Great
Seal Patent Office on the 8th June 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ANDREW
LAMB and WILLIAM ALLTOFT SUMMERS, both of Southampton, in the County
of Hants, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of December, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Andrew Lamb and William Alltoft Summers, Her special licence
that we, the said Andrew Lamb and William Alltoft Summers, our execu-
tors, administrators, and assigns, or such others as we, the said Andrew
Lamb and William Alltoft Summers, our executors, administrators, and
assigns, should at any time agree with, and no others, from time to time and
at all times thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVED ARRANGEMENTS OF APPARATUS FOR SUPERHEATING STEAM," upon
the condition (amongst others) that we, the said Andrew Lamb and William
Alltoft Summers, or one of us, our executors or administrators, by an instru-
ment in writing under our, or their, or one of our or their hands and
seals, should particularly describe and ascertain the nature of the said Inven-
tion, and in what manner the same was to. be performed, and cause the same
to be filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said Andrew Lamb and William Alltoft
Summers, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof, reference being had to the
Drawings hereunto annexed, that is to say:-
The object of our Invention is to divide the steam to be superheated into as

page_text: thin films or streams as may be, in order to get the whole quantity composing
such films or streams quickly, thoroughly, and economically superheated. We
pass the steam through thin channels or ways arranged cylindrically, spirally,
or parallel to each other, or in any other suitable direction in the flues, smoke
space, uptake, or chimney. Our Invention applies to those boilers known as
Lamb and Summers' patent flue boilers, but is also applicable to all other
steam boilers on land or sea.
In the Drawings hereunto annexed we have represented several arrange-
ments of apparatus which we employ in carrying our Invention into effect.
Figure 1 is a longitudinal elevation, partly in section, of the uptake and
funnel of a marine boiler, fitted with one forin of such apparatus; Figure 2 is
a plan of the same; Figure 3 is an external side view, and Figure 4 an
external end view of the superheating apparatus detached; Figure 5 is a
transverse vertical section of the same; and Figure 6 is a section taken
through one of the steam spaces. A is the pipe by which the steam enters
the said apparatus from the boiler, and B is the pipe by which it is conducted
from the apparatus to the cylinders after it has been superheated; C, C, are
the steam spaces, which are stayed by means of the rivets or stays a, a, the
number of which may be varied as the pressure may render necessary; and
D, D, are intermediate passages or spaces through which the hot gases from
the boiler flues rise before escaping from the funnel.
In Figures 7 and 8 we have illustrated another form of our apparatus,
Figure 7 being a plan partly in section, and Figure 8 an elevation, also partly
in section. A is the pipe by which the steam enters from the boiler, and B is
the pipe by which it is conducted away to the cylinders; C, C, are the steam
spaces, which in this case form a coil or tortuous passage, and are stayed by
means of the vertical stays a, a, as shewn; D, D, are the intermediate passages
through which the hot gases rise as before.
In Figures 9 and 10 we have shown views respectively analogous to
Figures and 8, but representing an apparatus in which the steam pursues a
spiral course through the space C, C, entering by the pipe A, and escaping by
the pipe B, or vice versâ ; D, D, are passages for the hot gases from the boiler
flúes; and a, a, are stays for strengthening the steam spaces, as before; b, b, are
slots or openings through which the steam passes from the spiral space C to
the pipe B, or vice versa.
One method by which we manufacture the apparatus with parallel channels.
or spaces is as follows (viz.):-We take a plate of iron, steel, copper, or other
material, and punch the necessary holes along its outside edges; we then bend

page_text: or flang the ends preparatory to their being attached to the end or strip plate,
which strip plate is so extended as to form a flange all round for, the purpose
of attaching the end plates, which forms the steam box at each end of the
apparatus. The top and bottom of these steam channels are united together
either by setting back the plates or inserting between them a bar of the
required thickness to form a proper steam film, fastening them together by
rivets.
One method adopted for staying is to insert between the plates a ferrule or
washer, with a rivet passing through and through, and rivetted on the outsides.
of the plates, or they can be stayed in a similar manner to the flues of Lamb
and Summers' patent boilers, or by any other convenient method.
One method of forming a proper connection for attaching steam pipes to
each end of the apparatus is by rivetting a strong ring to the end plates, and
for the proper distribution of the steam as it enters the apparatus we fix a disc.
or plate sufficiently large inside of the steam box, as shewn in dotted lines,
Figure 1 of the Drawings.
One method of manufacturing the spiral form of our apparatus is by joining
the plates top and bottom, either by rolled double angle iron, steel, or copper,
thus or by setting the plates sufficiently back so as to form a proper
steam space. This form of our apparatus can be stayed, as shewn in the
Drawings, or in the manner described for parallel channels, or by screwed
stays, such as are used in ordinary boiler work, but we do not bind ourselves
to any particular plan of staying.
One method of manufacturing the cylindrical form of our apparatus is by.
first forming a centre pipe sufficiently large to take the whole steam to the
cylinders, perforated on a portion of its circumference equal at least to the
arca of the steam pipe; we then connect our continuous channel to this centre
pipe by bent plates of the necessary curve, and continue plating until the
necessary amount of heating surface is obtained, terminating with a form
suitable for attachment to the steam pipe from the boilers.
The top and bottom can be connected thus
by double angle iron or
other material, or by setting back the plates, as described for spiral channels,
and the apparatus may be stayed, as shewn in the Drawings, or by any other
convenient mode, such as is used in boiler, water, and other spaces.
And having now described the nature of our said Invention, and in what
manner the same may be performed, we declare that we do not limit ourselves

page_text: to the details shewn in the Drawings, nor to the precise arrangements of
apparatus therein represented; but we claim,-
First, the several arrangements of apparatus for superheating steam herein-
before described and illustrated in the Drawings hereunto annexed.
Second, the construction of apparatus for superheating steam in such manner
that the steam spaces or passages thereof shall consist of thin channels or ways
arranged cylindrically, spirally, in parallel planes, or in any other suitable
direction in the flues, smoke space, uptake, or chimney, essentially in the
manner and for the purpose herein-before described.
In witness whereof, I, the said Andrew Lamb, have hereunto set my hand
and seal, this Sixth day of June, One thousand eight hundred and
fifty-nine.
ANDREW LAMB. (L.S.)