IMPROVE MENTS IN TUBULAR STEAM BOILERS
Year: 1861

page_text: LETTERS PATENT to Leon Pierre Barre, of Paris, France, and of 4, South
Street, Finsbury, London, Gentleman, for the Invention of "IMPROVE
MENTS IN TUBULAR STEAM BOILERS."
Sealed the 18th February 1862, and dated the 11th September 1861.
PROVISIONAL SPECIFICATION left by the said Leon Pierre Barre at
the Office of the Commissioners of Patents, with his Petition, on the 11th
September 1861.
I, LEON PIERRE BARRE, of Paris, France, and of 4, South Street, Finsbury,
London, Gentleman, do hereby declare the nature of my said Invention of
"IMPROVEMENTS IN TUBULAR STEAM BOILERS," to be as follows, that is to say:
My Invention relates to improvements upon former Letters Patent granted
to me February 3rd, 1860, No. 279, and consists, 1st, in improved means of
hermetically closing the joints between the tubes and the orifices of the end
plates of tubular boilers in which they are inserted.
2ndly, in a method of taking down and replacing easily and separately the
tubes of tubular boilers.
The fire tubes are placed in the two orifices about ath of an inch shorter
than the exterior extremities of the tubular plates. The closing is obtained by
means of a small tube of cast or wrought iron fitting in each end of the tubes,
and resting on the plate by means of a circular collar perpendicular to the
axis of the tube. These collars are concave underneath at the part which is
Price Sd1

page_text: applied to the plate. I form a groove round each opening in the tubular
plates for the collar of the small tube to fit in. The openings at the fire-box
end are pierced about th of an inch larger than the exterior diameter of the
tube, & those at the smoke-box end th of an inch larger. The space
between the tube & the orifices of the tubular plates is filled with bands of cloth
& red lead. The extremity of the tube at the smoke-box end has externally a
small ring or hoop, round which is twisted a band of cloth. held in its place
by packthread. I also surround the other extremity of the same tube with a
band of cloth, which is turned into the tube and held into its place by a wooden
plug. to enable the tube to be placed in the orifices of the tubular plates
without the bands of cloth being pushed back. When the tubes are placed
in the orifices of the tubular plates, I close the joints hermetically with the
small tubes above described, the under part of their collars being previously
conied with red lead, which are then pressed down on the sides of the tubes by
the forcing in of the small tubes, and adhere firmly thereto. The small tubes
are pushed back from the tubes by means of a spring driver.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Leon Pierre Barre in the Great Seal Patent Office on the
10th March 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, LEON
PIERRE BARRE, of Paris, France, and of 4, South Street, Finsbury, London,
Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of September, in the year of our Lord
One thousand eight hundred and sixty-one, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors. give and grant unto me
the said Leon Pierre Barre, Her special licence that I, the said
Leon Pierre Barre, my executors, administrators, and assigns, or such others
as I, the said Leon Pierre Barre, iny exccutors. administrators,
and assigns, should at any time agree with, and no others, from tinie to
time and at all times thereafter during the term therein expressed, should
and lawfully might make, use, exercise, and vend, within the United King-
dom of Great Britain and Ireland, the Channel Islands, and Isle of Man,
an Invention of "IMPROVEMENTS IN TUBULAR STEAM BOILERS," upon the con-
dition (amongst others) that I, the said Leon Pierre Barre, my executors
or administrators, by an instrument in writing under my, or their, or one of

page_text: their hands and seals, should particularly describe and ascertain the nature
of the said Invention, 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 I, the said Leon Pierre Barre, do hereby declare
the nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement; reference being had to the Drawing hereto annexed, and to the
figures and letters marked thereon, that is to say:-
My Invention relates to improvements: upon- former Letters Patent granted
to me on the Third day of February, One thousand eight hundred and sixty,
Number 279, and consists. first, in improved means of securely closing -the
joints between the tubes and the orifices of the end-plates of tubular boilers in
which they, are inserted.
Secondly, in a method of taking out and replacing separately and with
facility the tubes of tubular boilers without breaking or cutting them..
Thirdly, in rendering more easy and less expensive than heretofore the
cleaning and keeping in repair of the tubes.. I refer to the annexed Drawing,
in which the same letters of reference indicate similar parts."
DESCRIPTION OF THE DRAWING.
Figure 5, front view of a tubular plate fitted with the improved ferrules;
Figures 6, 7, 8, and 9, shew a side view, section, and top and bottom plans of
the ferrule; Figures 10, 11, 12, and 13, represent a top and bottom plan, side
view, and section of a packing ring; Figure 14, full-size view of the side of
the smoke-box plate fitted with the ferrule and packing ring; Figure 15, full-
size view of the fire-box plate, also fitted with the improved ferrule. Figures
1, 2, 3, 4, 16, 17, and 18, are views hereafter described.
The orifices a, a, Figure 1, in the boiler plate at the fire-box end must be
of the same diameter as the external diameter of the tubes, and the orifices b, b,
Figure 2, at the smoke-box end must be about one-seventh of an inch larger,
and even more if necessary, than the external diameter of the fire tubes. To
close more securely the joint at the connection of the tubes with the orifices a, a,
of the tubular plates, I employ at the fire-box end inside the boiler a metallic
ring M, Figure 1, which I adjust and solder to the external extremity of the
fire tube c, c.
I surround the tube between this ring and the tubular plate
with a hempen packing impregnated with white lead; or I place on the tube
a vulcanized india-rubber washer, either of which being employed is pressed

page_text: between the ring M and the tubular plate when the tube is fixed in the
orifices a, a. I can replace these modes of closing the joints by a mixture of
asbestos and hemp. The exterior end of the tube next the smoke-box is
furnished with a metallic packing ring R. Figure 2, formed externally with a
groove, round which I apply a hempen band impregnated with white lead, or
a band of asbestos and hemp. The ring R serves to fill up the space between
the tube and the tubular plate. It is also formed externally with a projecting
edge S. S. against which the tube abuts. to enable the washer to be pushed
out when the tube is to be drawn out of the orifices. I can replace the washer
by bending back the extremity of the tube, though I prefer using a washer.
The ferrules d. d. d. d, which form the external closing of the boiler tubes by
their flanges or collars being made to bear on the plates, adhere to the tubes
and orifices of the plates by reason of the difference in their diameters. I also
employ at the fire-box end of the tube a vulcanized indin-rubber or metallic
washer m'. m³. Figure 14, which washer is pressed between the packing ring R
set. at the extremity of the tube and the lower part of the flange of the ferrule.
thus fixing the latter in the boiler tube. At the smoke-box end of the tube I
make the orifice b. b. of two different diameters, the largest being in the external
part of the boiler plate for receiving the upper diameter of the ferrule d. The
ferrules are drawn out of the boiler tubes by means of a mandril acting as a
spring, Figure 3. The tubes are forced out of the holes by means of a metal
punch or tool T. Figure 4. the lower part of which is cylindrical, and of a
diameter in exact proportion to the internal diameter of the tube. The upper
part of the punch is provided with a shoulder z. z. and forms a projection of
nearly the same thickness as that of the fire tube, so that the projecting part
may bear on the whole circumference of the tube. When the punch T is
introduced into the tube, it is merely necessary to strike on its end to drive
out the tube. I can with this driver either take out the tubes or fix them up.
for this latter purpose it is introduced into their ends to force them directly
into the orifice of the plate at the fire-box end. In case the grates are very
small, and their depth does not allow of striking the tubes with a hammer to
push them out, I prefer making use of a screw rod P, P, Figures 17 and 18,
having at one end a screw thread and nut Y. Figure 17, bearing on a forked
bearer Z, Z, which I place against the tubular plate. By turning the nut Y
with a spanner or other suitable instrument, the screw rod P will be with-
drawn. The rod P is kept in the direction of the axis of the tube by means
of the ferrule V placed within the tube. At the other end, Figure 18. the
rod P, P, is provided with a plug Q. similar to the punch T. which plug Q
being pushed into the tube, is drawn against its sides by the action of the

page_text: screw.
By means of this tool I can draw out the tube until the metallic.
ring R at its extremity is entirely forced out of the plate b. b. Figure 17. The
taking out of the tube is then effected without difficulty. To fix the ferrules
in the tubes I use the same tool as before described, and by means of the set
screw obtain the necessary pressure for applying the ferrules at the same
time on the two ends of the fire tube; these small tubes are pressed by the
above-described packing rings of the proper form and size to keep the screw
rod in the direction of the axis of the tube, and to drive in the two ferrules.
To prevent the large plates of tubular boilers from separating, I place among
the ordinary tubes one or more iron tubes G, G, Figure 16, the extremities of
which, 11, H', are double the thickness of that of the other part of such tubes;
the end His formed with a collar, which is placed on one of the boiler plates,
and the other end H' has a screw thread, and which, by means of a nut applied
on the outer side of the plate, serves to fix the tube to its plate.
Having now described the nature of my Invention, and the manner in which
the same is to be performed, I would have it understood that I do not confine
myself to the precise details herein laid down; but what I claim is,-
First, the improved means of closing hermetically the joints between the fire
tubes and the orifices of the plates in tubular steam boilers, as herein-before
described and represented in the Drawing.
Secondly, the improved means of facilitating the taking down and setting
up of the fire tubes, as herein-before described and represented in
the Drawing.
In witness whereof, I, the said Leon Pierre Barre, have hereto set my
hand and seal, this Seventh day of March, in the year of our Lord One
thousand eight hundred and sixty-two.
L. P. BARKE. (L.S.)