Year: 1887

page_text: Date of Application, 18th July, 1887
Complete Left, 28th Nov., 1887
Complete Accepted, 30th Dec., 1887
I CHARLES VINCENT 92. Great Howard Street. Liverpool, Engineer do hereby
declare the nature of this invention to be as follows:-
This "Tube Stopper" consists of two conical cast iron plugs, a copper washer or
shell, an iron stayrod, nut and copper washer also a piece of iron tube placed between
the conical cast iron plugs to keep the plugs the required distance apart.
The front conical plug is turned larger than the inner diameter of the boiler tube.
The back conical plug is turned so small as just to pass through the boiler tube from
the front end into the combustion chamber end and on this small plug a light copper
conical shell or washer is placed only lapped inch at longitudinal seam and with
bevelled edges. By placing the piece of iron tube between the conical plugs and
passing the iron stayrod through the whole (first rivetting the smaller conical plug
on to the stayrod) then put on the copper washer and iron nut the "Tube Stopper
is then complete. Now place the whole into the burst tube and tighten the nut on
front end, whereupon the boiler tube will be hermetically sealed.
The operation above described being carried out, in accordance with my
Invention, whilst the boiler is under steam and also without necessitating drawing
the fires.
JAMES STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicant,
Under Power dated 19th August 1887.

page_text: I, CHARLES VINCENT 92 Great Howard Street, Liverpool, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:—
My invention has for its object the rapid and expeditious stopping or plugging of
the ends of boiler tubes in the event of the bursting or the leakage thereof, and is
intended for application to locomotive, marine or other multitubular boilers. The
chief advantage of my improved stopper lies in the fact that the tube may be stopped
without drawing the fires.
In order that my invention may be the better understood, I have appended the
accompanying sheet of drawings in which Figure 1 represents a sectional elevation of
the device or contrivance according to my invention, and Figure 2 shows the
application of the same to a boiler tube. Figure 3 is a plan of the copper shell to be
hereinafter referred to, and Figure 4 is an elevation of the same.
In the production of the improved boiler tube stopper according to my invention I
provide a stay bolt A, to one extremity of which is firmly secured a conical plug B,
the largest diameter of which is so formed that it will pass freely through the tube to
which it is to be applied. The opposite extremity of the stay bolt is screw threaded
at a and between said screw thread and the body of the stay bolt is provided an
angular or square formation, b. A conical plug B is arranged to slide upon said
angular or square part of the stay bolt A, and in order to make up the intervening
length between the fixed conical plug B, and the sliding conical plug B¹, a length of
iron tube C is interposed, and also a shorter length of pipe 1 of lead or other soft
metal; a suitablo nut E and washer F allowing of the compression of the two conical
plugs B and B¹. Upon the conical plug B₁ is fitted a shell G of copper or other
suitable metal of conical shape to correspond with the conical formation of the
plug B. Said shell G which is made by simply bending a piece of sheet metal to the
shape of, and to fit the plug B, is lapped without joint or seam, so that the external
diameter may be increased according to the internal pressure of the cone B, and
decreased at will relatively to the degree of elasticity of the metal of which the conical
shell G may be formed.
In the application of the improved "boiler tube stopper" according to my invention,
1 first insert the fixed cone B into the burst or leaky tube, then slightly compressing the
shell G, the latter is also introduced into the tube, and pushed inwards from the bulk-
head or tube plate by means of the iron tube C and the lead pipe or tube D, the
second conical plug B¹ being loose upon the angular or square part 6 of the stay
bolt A. When the shell G is free of the tube at the "combustion chamber" end, it
opens out or expands, and allows of the "grip" of the conical plug B when the
latter is caused to enter by means of the threaded end 6 of the stay bolt A and nut E.
It is evident from the foregoing that tubes of varying diameters may be stopped

page_text: with equal facility by means of my improved "tube stopper," inasmuch as the shell G
may fit the boiler tube when the conical plug B has only partially entered within it ;
in other cases, the conical plug may be forced-by the compression effected by the
screw and nut-right into the interior of the shell G, and thus enlarge its diameter
to suit a much larger tube.
The distance between the cones B and B is determined by the lengths of pipe
threaded upon the stay bolt A which may vary according to the relative lengths of
the boiler tubes in which the apparatus above described is to be employed, compression
to the whole being effected by means of the short piece of soft metal tube c above
mentioned.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
First The improved boiler tube stopper substantially as herein described and
shown in the accompanying drawings.
Second-In a boiler tube stopper as herein described the employment of a metal
shell G in combination with the cone B substantially as and for the purpose herein
set forth.
Third-The employment of a short tube of lead or other soft metal, to serve as a
compressible distance piece substantially as herein set forth.
1005
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LOOK TODAY TO
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THIS BOOK чay
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, W.C.,
Agent for Applicant.