Improvements in the Construction of Appliances for Stopping Leaks in Vessels from the Inside, and for other like Purposes.
Year: 1885

page_text: Improvements in the Construction of Appliances for Stopping
Leaks in Vessels from the Inside, and for other like Purposes.
I THOMAS HODGSON 31 Broad Chare Newcastle on Tyne Marine Surveyor, do
hereby declare the nature of my invention for STOPPING LEAKS &C. to be as
follows:-
This Invention consists of two screw bolts made various lengths & sizes & two
nuts. One screw bolt working inside the other.
The outside bolt is hollow with screw threads on the outside & also on the inside.
The bottom end of outside bolt is slitted.
The inside bolt is made longer than the outside bolt & has a cone on the lower
end. Thick end of cone being same diameter as lower or split end of outside
bolt The inside bolt has a screw thread on the outside corresponding with the
inside thread in hollow or outer screw bolt.
This inside bolt working inside of outer bolt is intended to screw up the cone
inside the splits thereby swelling out the lower end of outside bolt & forming a
countersunk.
Upper ends of both bolts being square are adapted for spanners to screw up
the cone.
The thread on the outside of the outer or hollow bolt is intended for 2 nuts.
The lower nut to screw against the countersunk. Thereby drawing plate edges
together or other work The other nut is for securing packing plates or wood inside
for internal work,
The said bolt is above described more especially in its application for stopping
leaks in vessels from the inside (afloat or otherwise) arising from defective rivets,
fractures holes, started plate edges, or any other cause. But it may also serve for
securing sets for drilling in iron ship building or engineering work.

page_text: Арупа поро
Stopping
Leaks in Vessels from the Inside, and for other like Purposes.
I THOMAS HODGSON of 31 Broad Chare in the City and County of Newcastle
upon Tyne Marine Surveyor do hereby declare the nature of said invention and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :—
This invention consists of two screw bolts made various lengths and sizes and
two nuts, one screw bolt working inside the other.
The outside bolt is hollow with screw threads on the outside and also on the
inside The bottom end of outside bolt is slitted.
The inside bolt is made longer than the outside bolt and has a cone on the lower
end, thick end of cone being same diameter as lower or split end of outside bolt-The
inside bolt has a screw thread on the outside, corresponding with the inside thread
in hollow or outer screw bolt, or the outside or hollow bolt may be plain on inside
the inside bolt being drawn up or forced down by a nut working against the top
end of outside bolt.
This inside bolt working inside of outer bolt is intended to screw up the coue
inside the splits thereby swelling out the lower end of outside bolt and forming
a countersunk, (when the hole is tapered) or to expand the slitted end by forcing
into it the tapered end of inside bolt.
When the inside of hollow bolt is screwed the upper ends of both bolts being square
are adapted for spanners to screw up the cone.
The thread on the outside of the outer or hollow bolt is intended for 2 nuts-
The lower nut to screw against the inner plate after the slitted end is expanded,
thereby drawing plate edges together and forming a fulcrum for other work-The
other nut is for securing packing plates or wood inside for internal work.
The said bolt is above described more especially in its application for stopping
leaks in vessels from the inside (afloat or otherwise) arising from defective rivets,
fractures or holes, started plate edges, or any other cause, but it may also serve, for
securing sets for drilling in iron ship building or engineering work such as stopping
rivet holes in boilers or drawing together leaky seams.
DESCRIPTION OF DRAWINGS.
The accompanying sheet of drawings illustrates various modes of applying my
invention.
Figure 1 shews an external view and Figure 2 a plan of the outer or hollow bolt
one end A being slitted the other end B formed to receive a spanner by which to
hold it when being applied. O is the binding nut, D the nut by which wood or
other packing may be secured inside of ship Figure 3 shews an external view of
the inside screwed bolt with tapered or cone shaped end E to draw up in the thread
of hollow bolt by a spanner applied to square head F.
Figure 4 shows the two halts as being enplied the slitted and muniantim

page_text: the cone shaped end of inner bolt the binding nut C being now screwed tight against
plate when packing may be applied and secured by nut D.
Figure 6 shews the outer hollow bolt with slitted end formed to expand by
screwing down the inner bolt (shewn by figure 7) which has a tapered end.
Figure 8 shews the two bolts being applied and
Figure 9 the slitted end expanded by the tapered end of inner bolt screwed down
into it-The inside of slitted end is in this case formed to correspond with the
taper on inner bolt as shewn by dotted lines on Figure 8.
Figure 10 shews a section and Figure 11 a plan of the outer and inner bolts the
slitted end being expanded by the cone shaped end of inner bolt drawn up within
the hollow bolt by the nut G, bearing on top end of hollow bolt, travelling on
threads of inner bolt by means of a spanner the inside of hollow bolt being plain-
Wood packing H is here shewn applied inside and secured by the nut D.
As applied to stopping rivet holes or drawing together leaky seams in boilers or
similar vessels the operation is the same but the application will generally be most
convenient from the outside.
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. For stopping from the inside leaks in ships, caused by broken or defective
rivets fractures or holes in plates or by started plate edges, the application of stoppers
consisting of a hollow bolt having one end slitted so as to expand by means of an
inner bolt-acting either inward from outside or outward from inside-so as to fill
the hole and further when necessary to form a fulcrum for drawing together the
edges of the started plates and providing for internal plating and packing, if
required, substantially as described and illustrated.
Second. The application of stoppers so constructed to stopping leaks in boilers
or similar vessels caused by broken or defective rivets or started seams so as to fill
the hole and further when necessary to form a fulcrum for drawing together the
edges of the started seams and providing for further stopping by means of elastic
or other packing if required, substantially as described and illustrated.
Witness:
'COOT TATTO CON TANT
T. J. DANSON, F. Inst. P. Agents,
Newcastle on Tyne,
THOMAS HODGSON.