IMPROVEMENTS IN THE RIVETTED JOINTS OF STEAM BOILERS AND OTHER VESSELS INTENDED TO RETAIN STEAM OR OTHER FLUID UNDER PRESSURE."
Year: 1880

page_text: LETTERS PATENT to Peter Samson, of 25, Park Road Villas, Forest Hill, in
the County of Surrey, for an Invention of "IMPROVEMENTS IN THE RIVETTED
JOINTS OF STEAM BOILERS AND OTHER VESSELS INTENDED TO RETAIN STEAM
OR OTHER FLUID UNDER PRESSURE."
PROVISIONAL SPECIFICATION left by the said Peter Samson at the Office
of the Commissioners of Patents on the 28th April 1880.
PETER SAMSON, of 25, Park Road Villas, Forest Hill, in the County of Surrey.
"IMPROVEMENTS IN THE RIVETTED JOINTS OF STEAM BOILERS AND OTHER VESSELS
INTENDED TO RETAIN STEAM OR OTHER FLUID UNDER PRESSURE."
This Invention has for its object improvements in the rivetted joints of steam
boilers and other vessels intended to retain steam or other fluid under pressure.
I construct such rivetted joints with butt strips on both sides, and with the
inner butt strip wider than the outer, so as to take an additional row or rows of
rivets on either side. The rivets in these outer or additional rows are pitched
wider apart than the rivets which pass through both butt strips; by preference
the pitch is double. The inner butt strips should be thicker than the outer butt
strips.
In order to admit of the more effectual caulking of the edges of the inner butt
strips, I indent theso edges in such manner that in the spaces between the widely
pitched rivets of the outer row, the edge of the butt plate may approach the
rivets of the inner row, so that the edge may never be so far removed from a rivet
as in caulking to spring away injuriously from the skin plate of the boiler or
vessel.
The edges of the outer butt plate are also caulked as is usual.
In forming lap joints with two or more rows of rivets, I also indent the caulking
edges of the plates between the widely spaced rivets of the outer row, in order that
the joint may be caulked throughout under favorable circumstances as respects
the distance of the edge of the plate from the rivet.

page_text: SPECIFICATION in pursuanco of the conditions of the Letters Patent filed
by the said Peter Samson in the Great Seal Patent Office on the 28th October
1880.
PETER SAMSON, of 25, Park Road Villas, Forest Hill, in the County of Surrey.
"IMPROVEMENTS IN THE RIVETTED JOINTS OF STEAM BOILERS AND OTHER VESSELS
INTENDED TO RETAIN STEAM OR OTHER FLuid under PRESSURE."
This Invention has for its object improvements in the rivetted joints of steam
boilers, and other vessels intended to retain steam or other fluid under pressure.
I construct such rivetted joints with butt strips on both sides; and with the
inner butt strip wider than the outer, so as to take an additional row or rows of
rivets on either side. The rivets in these outer or additional rows are pitched
wider apart than the rivets which pass through both butt strips; by preference
the pitch is double. The inner butt strips should be thicker than the outer butt
strips.
In order to admit of the more effectual caulking of the edges of the inner butt
strips, I indent these edges in such manner that in the spaces between the widely
pitched rivets of the outer row, the edge of the butt plate may approach the
rivets of the inner row, so that the edge may never be so far removed from a
rivet as in caulking to spring away injuriously from the skin plate of the boiler or
vessel.
The edges of the outer butt plate are also caulked as is usual.
In forming lap joints with two or more rows of rivets, I also indent the caulking
edges of the plates between the widely spaced rivets of the outer row in order that
the joint may be canlked throughout under favourable circumstances as respects the
distance of the edge of the plate from the rivet.
In order that my said Invention may be most fully understood and readily
carried into effect, I will proceed to describe the Drawings hereunto annexed.
Figure I and Figuro 1ª illustrate that part of my Invention which consists in
using a wider butt strip on one side than on the other, the wider butt strip taking
an additional row or rows of rivets.
Figure 1 shows a portion of the side of the boiler or vessel, and Figure 1ª is a
transverse section taken on the line 1, 1, in Figure 1; a, a, are the skin plates of
the boiler or vessel; b is the butt strip on the inner side; it is both wider and
stouter than the butt strip c on the outer side, and it receives on either side an
additional row of rivets; d, d, are the rivets which pass through both butt strips
as well as the skin plates a, a, and d', d', are the rivets of the outer rows, and
these pass through the skin plate and the inner butt strip only. The rivets d' aro
spaced wider than the rivets d, and consequently the skin plates a, a, remain
stronger along the line of the rivets (where they are exposed to the full strain) than
they are along the line of the rivets & where the strain is less by the amount which
falls upon the rivets d².
Figures 2 and 2 show a like arrangement, and illustrato also the part of my
Invention which consists in indenting the edge of the butt strip between the rivets
of the outer row, so that the edge may every where be brought sufficiently near to
the rivets to be effectually caulked.
In Figures 3 and 3ª this part of my Invention is applied to a butt joint with a
butt strip on one side only.
Figures 4 and 4 show this part of my Invention applied to a butt joint in
which the butt strips on the two sides are of equal width and substance.

page_text: Figures 5 and 5 show the application of a like arrangement to a lap joint, and
here it is the edges of the skin plates which are indented between the rivets of tho
widely spaced outer rows.
Figures 6 and 6ª differ from the Figures 5 and 5ª only in that the rivets are so
set as to admit of the edges of the plates being so deeply indented as to approach
the rivets of the central row.
The setting and spacing of the rivets may be varied without departing from my
Invention, but I claim,-
First. The improvement in butt joints consisting in applying a broader butt
strip on one side than on the other, such broader butt strip receiving additional
rows of rivets, and the rivets in the outer rows being more widely spaced than in
the inner rows which pass through both butt strips.
Second. The improvement in butt joints in which where there are outer rows
of more widely spaced rivets, consisting in indenting the edges of the butt strip
between the rivets of the outer rows, so that the edges may approach the rivets
of the inner rows sufficiently nearly to admit of the joint being properly caulked.
Third. The improvement in butt joints consisting in forming them both with
butt strips of different widths on the two sides (the wider butt strip receiving
additional rows of rivets) and with indented edges to the wider butt strip,
substantially as indicated by the Figures 2 and 20 of the Drawings.
Fourth. The improvement in lap joints in which there are outer rows of more
widely spaced rivets, consisting in indenting the edges of the plates between the
rivets of the outer rows, so that the edges may approach the rivets of the inner
rows sufficiently nearly to admit of the joint being properly caulked.
In witness whereof, I; the said Peter Samson, have hereunto set my hand
and seal, this Twenty eighth day of October, in the year of our Lord
One thousand eight hundred and eighty..
PETER SAMSON