IMPROVEMENTS IN THE MEANS OR APPARATUS EMPLOYED FOR PLUGGING MARINE AND OTHER BOILER TUBES
Year: 1879

page_text: LETTERS PATENT to Robert Linsley, of Kingston upon Hull, in the County of
York, for the Invention of "IMPROVEMENTS IN THE MEANS OR APPARATUS
EMPLOYED FOR PLUGGING MARINE AND OTHER BOILER TUBES,"
Sealed the 12th September 1879, and dated the 19th March 1879.
PROVISIONAL SPECIFICATION left by the said Robert Linsley at the Office
of the Commissioners of Patents on the 19th March 1879.
ROBERT LINSLEY, of Kingston upon Hull, in the County of York.
"IMPROVE
MENTS IN THE MEANS OR APPARATUS EMPLOYED FOR PLUGGING MARINE AND
OTHER BOILER TUBES."
The object of my Invention is to provide an arrangement of apparatus for the
purpose of plugging the tubes of marine and other tubular boilers when any. of
such tubes burst, rendering them perfectly steam and water tight for any required
length of time.
'
In order to achieve this end I stop up both ends of the tube by means of the
following arrangement of apparatus:-
One of the plugs I construct by preference of lead and hollow; within this I
provide a cone, such cone being attached to a rod which varies in length in accord-
ance with the length of the boiler. At the near end of the tube I insert a wooden
plug, made slightly conical, through which the rod projects to the exterior. Upon
the rod, and between the two plugs, I provide a long ferrule or tube, retaining them
thereby in their required position at each end of the tubes during the operation of
expanding the hollow leaden plug, this operation being performed by drawing the
cone on the outer end of the rod into the hollow plug, such expanding rendering
In order to draw the cone
the end of the tube perfectly steam and water tight.
within the plug I provide a screw on the projecting end of the rod, and on it a nut,
through the medium of which the operation is performed. The wooden plug is
driven into position and made perfectly steam and watertight by preference previous
to expanding the hollow leaden plug.
The hollow leaden plug is made less, by preference, than the tubes for which it
is required, for the purpose of passing any fracture or other protuberance in the
interior.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Linsley in the Great Seal Patent Office on the 18th September
1879.
ROBERT LINSLEY, of Kingston upon Hull, in the County of York. " IMPROVE-
MENTS IN THE MEANS OR APPARATUS EMPLOYED FOR PLUGGING MARINE AND
OTHER BOILER TUBES."
The object af my Invention is to provide an arrangement of apparatus for the
purpose of plugging the tubes of marine and other tubular boilers when any of
such tubes burst, rendering them perfectly steam and watertight for any required
length of time.
In order to achieve this end I stop up both ends of the tube by means of the
following arrangement of apparatus :—
One of the plugs I construct by preference of lead and hollow; within this I
provide a cone, such cone being attached to a rod which varies in length in accord-
ance with the length of the boiler. At the near end of the tube I insert a wooden
plug, made slightly conical, through which the rod projects to the exterior. Upon
the rod, and between the two plugs, I provide a long ferrule or tube, retaining them
thereby in their required position at each end of the tubes during the operation of
expanding the hollow leaden plug, this operation being performed by drawing the
cone on the outer end of the rod into the hollow plug, such expanding rendering
the end of the tube perfectly steam and watertight. In order to draw the cone
within the plug I provide a screw on the projecting end of the rod, and on it a nut,
through the medium of which the operation is performed. The wooden plug is
driven into position and made perfectly steam and watertight by preference previous
to expanding the hollow leaden plug.
The hollow leaden plug is made less by preference than the tubes for which it
is required, for the purpose of passing any fracture or other protuberance in the
interior.
And in order that my Invention may be more completely understood, reference
is given to the accompanying Sheet of Drawings, and to the letters and marks
Fig. 1 is a longitudinal section of my Invention.
Fig. 2 represents a longitudinal section of boiler tube, with my Invention applied
thereto.
a is a hollow plug, which I by preference make of lead; within this I provide a
cone b, such cone being attached to the rod c, which varies in length in accordance
with the length of tube and boiler. I employ also a slightly conical plug d, which
by preference I make of wood; through this the rod c projects, as shewn at e.
Upon the rod c, and between the plugs a and d, I provide a long ferrule or tube f,
for the purpose of retaining them in their proper position in the boiler tube g, Fig. 2,
during the operation of expanding the hollow leaden plug, this operation being
performed by drawing the cone b on the outer end of the rod c into the hollow plug
a into position shewn at Fig. 2, such expanding rendering the ends of the tube
perfectly steam and water tight. In order to draw the cone 6 within the plug a, I
provide a screw h on the projecting end of the rod c, and on it a nut i, through the
medium of which the operation is performed. The wooden plug d is driven into
position, as shewn at Fig. 2, and made perfectly steam and water tight previous to
the expanding of the hollow leaden plug a, and the hollow leaden plug is made by
preference of less diameter before being expanded, for the purpose of passing any
fracture, scale, or other protuberance in the interior.

page_text: Having now described the nature of my said Invention, and described with the
aid of Drawings how the same may be carried into practice, I would have it under-
stood that I do not limit myself to the precise details or configuration of the parts
I have described and shewn, as the same may be varied or modified without
departing from the nature of my said Invention, but what I claim and desire to be
secured to me by Letters Patent is,―
The arrangement, construction, and combination of the various parts forming the
apparatus for plugging the tubes of marine and other tubular boilers, substantially
as herein set forth.
In witness whereof, I, the said Robert Linsley, have hereunto set my hand
and seal, this Sixteenth day of September, in the year of our Lord One
thousand eight hundred and seventy nine.
ROBERT LINSLEY. (L.S.)