IMPROVED METHOD OF ARRANGING OR FITTING TUBES IN BOILERS, AND FOR PROTECTING THE TUBE ENDS FROM THE DIRECT ACTION OF HEAT
Year: 1874

page_text: LETTERS PATENT to Edmund Walker, of No. 11, Leadenhall Street,
in the City of London, for the Invention of "IMPROVED METHOD
OF ARRANGING OR FITTING TUBES IN BOILERS, AND FOR PROTECTING THE
TUBE ENDS FROM THE DIRECT ACTION OF HEAT."-A communication
from abroad by H. Pauksch, of Landsberg, in the Kingdom of
Prussia.
PROVISIONAL SPECIFICATION left by the said Edmund Walker at the
Office of the Commissioners of Patents, with his Petition, on the
10th December 1874.
I, EDMUND WALKER, of No. 11, Leadenhall Street, in the City of
London, do hereby declare the nature of the said Invention for "Iм-
PROVED METHOD OF ARRANGING OR FITTING TUBES IN BOILERS, AND FOR PROTECTING
THE TUBE ENDS FROM THE DIRECT ACTION OF HEAT," a communication from
abroad by H. Pauksch, of Landsberg, in the Kingdom of Prussia, to be
as follows:-
This Invention relates to conical rings or ferrules soldered on the ends

page_text: of boiler tubes and then driven in or swaged in place by a tool, such as
a tube expander. The end of the tube and its ring projects beyond the
face of the boiler, so that the ring protects the tube end from injury by
heat or otherwise. Plain rings may be soldered on, and then turned
cone shape in sizes corresponding to the holes they have to fit. The
ring-ended tubes can be expanded when in the holes.
By the use of this Invention boiler tubes are preserved; the stays or
tie bars are reduced in number; the tubes are less liable to corrode or to
become clogged; a more compact arrangement of tubes can be made;
and the rings or ferrules can be casily removed by loosening the solder
joints.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edmund Walker in the Great Scal Patent Office
on the 10th June 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDMUND
WALKER, of No. 11, Leadenhall Street, in the City of London, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Tenth day of December, in the
year of our Lord One thousand eight hundred and seventy-four, in 1
the thirty-eighth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said Edmund Walker, Her
special licence that I, the said Edmund Walker, my executors, admi-
nistrators, and assigns, or such others as I, the said Edmund Walker,
my exccutors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during
the term thercin 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 METHOD OF ARRANGING OR FITTING TUBES IN BOILERS, AND FOR PRO-
TECTING THE TUBE ENDS FROM THE DIRECT ACTION OF HEAT," communicated
to me from abroad by H. Pauksch, of Landsberg, in the Kingdom
of Prussia," upon the condition (amongst others) that I, the said
Edmund Walker, my executors or administrators, by an instrument

page_text: may be on the inside of the tube ends, as in Figure 6; as part of the tube
itself, or they may be arranged in that position and soldered, so that by
the expansion of such ends by a proper tool the ends outside may be
caused to fit the holes in the boiler plates.
Figure 7 represents a sectional elevation of a tube, with the ends of t
enlarged form and turned or otherwise shaped conical on the outside.
In the case of making the increased or extra thickness on the inside
portion of a tube end the expansion can be so arranged that the cones of
the two corresponding holes in the boiler plates C, D, may be reversed,
and then the tube when fitted acts as a stay or tie, thereby reducing the
number of stay or tie bars usually fitted in a boiler.
The ends of the rings or ferrules with the tubes in every case project
on one or on both faces of the boiler, and since the ring portions are of
the larger diameter the ends of the tube proper become protected from
the direct action of the fire or heat, and are thereby preserved from
corrosion and also from cracking.
In the case of leakage under excessive pressure of steam the faulty
tube has only to be driven in a little or the end be swaged out to make
it steam tight.
The Invention is applicable to all kinds of boilers in which tubes as
smoke or water tubes are employed, and can be fitted into existing
boilers by simply removing the old tubes and making the holes in the
boiler plates conical to correspond.
It will be obvious that the cleaning and repair of the interior of
boilers fitted with these tubes will be rendered very simple, as they can
be effected by removing the tubes, which can so readily be done.
And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that claim is made,―
Firstly. To the improved method of arranging or fitting tubes in
boilers, as and for the purposes set forth.
Secondly. To fitting, by solder or otherwise, rings or ferrules on or in
the ends of boiler tubes, such rings or ferrules being made conical to fit
corresponding shaped holes in boiler plates, as and for the purposes set
forth, and as shown in the accompanying Drawings.

page_text: Thirdly. To making boiler tubes with one or more enlarged ends (the
enlargement being inside or outside), and capable of expansion, as and
for the purposes set forth.
In witness whereof, I, the said Edmund Walker, have hereunto
set my hand and seal, this Ninth day of June, Ono thousand
eight hundred and seventy-five.