IMPROVEMENTS IN STEAM BOILERS
Year: 1862

page_text: LETTERS PATENT to John Johnson, of Heaton Norris, in the County
of Lancaster, and Samuel Morris, of Stockport, in the County of Chester,..
for the Invention of "IMPROVEMENTS IN STEAM BOILERS."
for the Invention of "IMPROVEMENTS IN STEAM BOILERS."
Sealed the 5th September 1862, and dated the 12th March 1862..
PROVISIONAL SPECIFICATION. left by the said John Johnson and
Samuel Morris at the Office of the Commissioners of. Patents, with
their Petition, on the 12th March 1862..
We, JOHN JOHNSON, of Heaton Norris, in the County of Lancaster, and
SAMUEL MORRIS, of Stockport, in the County of Chester, do hereby declare
the nature of the said. Invention. for. "IMPROVEMENTS: IN STEAM BOILERS," to
be as follows:-
. We make the fire-bridge hollow, of any suitable form to suit the flue, with
any suitable number of horizontal tubes of the multitubular class, the hollow.
bridge being supported by a vertical pipe or tube secured firmly to the bottom.
of the boiler by rivets, screws, lock nuts, or other suitable contrivance with a
cross tube at the top running longitudinally with the boiler or crossways, the

page_text: said cross tube being secured to the top of the hollow bridge inside the flue
in any suitable manner; or, for the sake of convenience and portability, we
introduce a flange joint in the bottom support, so that the hollow bridge can
be removed without disturbing the fastening to the boiler. We also use
double cylinders with longitudinal tubes placed either inside the boiler or
used separately as an independent apparatus, to heat the water before entering
the boiler; or we heat the water by the exhaust steam from the engine pre-
vious to entering the boiler. We also place or fix tubes in a diagonal position
lengthwise in the flue, and also cross tubes, in connection or separately, for
the purpose of obtaining a free circulation of water, and thus creating a great
saving of the wear and tear of the boiler, as well as preventing accidents, and
lessening the amount of contraction and expansion of the metal. A very
great advantage is also obtained in the economisation of fuel.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Johnson and Samuel Morris in the Great Seal Patent
Office on the 12th September 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
JOHNSON, of Heaton Norris, in the County of Lancaster, and SAMUEL MORRIS,
of Stockport, in the County of Chester, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of March, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said John Johnson and Samuel Morris, Her special licence that we, the
said John Johnson and Samuel Morris, our executors, administrators, and
assigns, or such others as we, the said John Johnson and Samuel Morris, 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 "IMPROVEMENTS IN STEAM BOILERS," upon the
condition (amongst others) that we, the said John Johnson and Samuel
Morris, our executors or administrators, by an instrument in writing under
our, or their, or one of their hands, and seals,. should particularly describe
and ascertain the nature of the said Invention, and in what manner the

page_text: 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 John Johnson and Samuel Morris,
do hereby declare the nature of our said Invention, and in what manner
the same is to be performed, to be particularly described, and ascertained
in and by the following statement (that is to say):-
i
We make the fire-bridge hollow, of any suitable form to suit the flue, and
place through the bridge any desired number of horizontal tubes of the multi-.
tubular class, and support the said bridge by a vertical pipe or tube secured
firmly to the bottom of the flue by rivets, screws, lock nuts, or other suitable
means. When the bridge is under a junction pipe, or when required from
any other cause, we connect to the tube at the top of the bridge a cress tube,
and place it longitudinally or transversely with the flue of the boiler, the said.
cross tube being secured in any suitable manner. When desired, for the sake
of convenience and portability, we employ a flange joint between the bottom
of the bridge and the bottom of the flue. We obtain additional heating
surface by placing in the flue a double cylinder of any suitable length, and
connect it to the top and bottom of the flue by pipes or tubes communicating
with the water in the boiler, the said double cylinder being made either with
or without longitudinal tubes extending through it, as may be required. We
also place or fix in the flue a number of tubes in a diagonal position longi-
tudinally, and also cross tubes, in connection or separately, for obtaining an
increased heating surface and free circulation of water. We also employ a
double cylinder, either with or without tubes, for heating the feed water to
the boiler, which double cylinder we place either in the back part of the flue,.
or connect it to the exhaust steam pipe, and pass through it the exhaust steam,
from the engine. The double cylinder and hollow bridge are formed of
welded wrought iron.
This Invention will be clearly understood by referring to the figures and
letters on the accompanying Sheet of Drawings, in which Figs. 1 and 2 are:
transverse and longitudinal sections of a two-flued boiler, having some of our
improvements attached. Fig. 3 is a front view of the connecting parts of the
hollow tubular bridge drawn to an enlarged scale. Figs. 4 and 5 are front
and side views of the double cylinder for obtaining additional heating surface;
and Fig. 6 a section, and Fig. 7 an end elevation, of the double cylinder.
employed for heating the feed water.
In Figs. 1 and 2 the flues of the boiler are shewn at a, and the hollow

page_text: tubular bridge at b, the top of which is connected to the top of the flue by the
screwed tube c, and lock nuts d, e, there being washers f, g, fitted to the
curved surface of the flue. The bottom of the bridge is strengthened by a
strong plate h, also shewn in Fig. 3, to which plate is screwed, as in Figs. 1
and 2, or rivetted, as in Fig. 3, a screwed tube or pipe i, having upon it the
flange and nut 1. To the bottom of the flue is rivetted the strong hollow
block m, on the top of which the flange k is jointed, and held fast by the
nut and T'bolts n. The hollow block m is bored to receive the tube.or
pipe o for causing the water to circulate from the bottom to the upper part
of the boiler.
One part of our improvements for obtaining additional heating surface is
shewn in Figs. 4 and 5; it consists of the double cylinder p, provided with a
number of longitudinal fire tubes. The said cylinder is connected to the top
and bottom of the flue by screwed tubes, nuts, and flanges similar to that at
the top of the hollow bridge. One of the longitudinal tubes for increasing the
heating surface is shewn at q, Fig. 2, and the cross tubes for the same purpose
at r, 'Figs. 1 and 2. These tubes are used separately or combined, and also
employed in any desired manner with the hollow bridge and double cylinder p,
or without them. The tubes q are placed diagonally for enabling the water to
circulate, and the cross tubes are placed in all positions, and all the tubes are
fixed to the flue by screwed tubes, nuts, and flanges as at the top of the hollow
bridge.
One of the double cylinders for heating the water for feeding the boiler is
shewn in Figs. 6 and 7; it is made of any suitable diameter and length, and
has tubes through it or not, as may be required. At the upper and lower
parts of the double cylinder, either at the ends or sides, there are junction
pipes and flanges, the lower pipe communicating with the pump or supply,
and the upper pipe with the boiler. The aforesaid double cylinder is heated
either by means of the exhaust steam from the engine, or by placing it in the
flue at the end of the boiler. By these improvements we create a great saving
in the wear and tear of the boiler, as well as preventing accidents, and lessening
the amount of contraction and expansion of the metal. A very great advantage
is also obtained in the economisation of fuel.
Having now described our Invention, we desire it to be understood that we
claim the improved hollow tubular fire-bridge, and improved tubes and double
cylinder for obtaining additional heating surface, free circulation of water, and.
also the double cylinder with or without tubes for heating the feed water for
the boiler, and the improved mode or method of applying or connecting the

page_text: same, as all such improvements are herein described and illustrated in the
accompanying Sheet of Drawings.
In witness whereof, we, the said John Johnson and Samuel Morris,
have hereunto set our hands and seals, this Ninth day of September,
in the year of our Lord One thousand eight hundred and sixty-two.
Signed, sealed, and delivered by
the within-named John Johnson
and Samuel Morris, in the pre-
sence of
E. J. HUGHES,
Patent Agent,
Manchester.
JOHN JOHNSON.
(L.S.)
SAMUEL MORRIS. (L.S.)