on the Intercostal and Web Frame Principle.
Year: 1886

page_text: on the Intercostal and Web Frame Principle.
We, HENRY WITHY and GEORGE WILLIAM SIVEWRIGHT, both of West Hartle-
pool, in the County of Durham, Shipbuilders, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
In iron or steel vessels constructed on the system known as the "intercostal and
web frame principle" the longitudinal hold stringors as usually constructed consist
of a combination of a plato and angle bars, the angle bars forming flanges along the
edges of the plate, the inner flange providing means for connecting the hold stringer
to the shell of the ship, and the outer or projecting flange acting as a stiffener to the
plate. The web frames are erected transversely in the ship, and occupy positions at
right angles to the hold stringers, to which they are connected at the intersections of
their outer flanges by cover plates. Each web frame is also a combination of a
plate and angle bars forming a flange along the inner edge to connect it to the
ships' shell, and along the outer or projecting edge as a stiffener. This arrange-
ment is in some cases further stiffened by an angle bar running along the horizontal
web of the hold stringer so as to form an intermediate flange at such a position
between the flanges at the edges as to enable it to be rivetted to the inside flange
of the ordinary reverse frames, this intermediate angle bar is omitted if not required
for this purpose.
Our Invention relates to the system of building up and connecting together, and
to the ships' shell, these hold stringers and web frames, and has for its object to
effect this by a more simple arrangement, so as to reduce both the weight of
material and amount of labour required, by substituting special sections or bars of
iron or steel for the above described combination of plates and angle bars.
And in order that our invention may be understood, we will now proceed to
describe the same with reference to the accompanying drawings, in which Fig. 1.
is a sectional view of a ships' side in which the intercostal and web frame principle
is carried out in accordance with part of our invention and illustrates the arrango-
ment of and connection between the longitudinal hold stringers A', A', A³, and
the web frame B. Figures 2, 3, 4, and 5 are drawn to a larger scale than Fig. 1;

page_text: Fig. 2 illustrates in section the combination of a plate and angle bars required in
the usual construction of a longitudinal hold stringer, and Fig. 3 illustrates in
section the similar combination usually employed in the construction of the corre-
sponding web frames, the intermediate angle bar C being provided when required
to rivet the intercostals to the reverse frames, and is omitted when not required
for this purpose. Figures 4 and 5 are corresponding sectional views of the special
forms or distribution of material which we substitute for those illustrated in
Figures 2 and 3, in which a bar or plate rolled or manufactured in one piece or
complete section answers the purpose of the combination of plates and angles
illustrated in Figures 2 and 3.
When it is desirable to stiffen our combination of the intercostals and web frames
by rivetting them to the inside flanges of the ordinary reverse bars, as already
described with reference to the system of construction as usually carried out, we
provide in its proper position an intermediate flange or projection D running con-
tinuously along the web of the rolled bar of which it forms part, as illustrated in
Fig. 4, this intermediate flange forming part of the intercostals or web frames when
required to rivet them to the inside flange of the ordinary reverse frames, but are
omitted when not required for this purpose, that is, the sections or bars illustrated
in Figures 4 and 5 may be substituted for each other as required in both web
frames and intercostals. The same means of connecting the intercostals to the
web frames, at the intersections of their flanges, will apply when they are con-
structed according to our invention as already described with reference to the
ordinary manner of construction, as for instance, by the employment of cover
plates over the joints of the flanges and rivetted thereto in the usual manner.
Having now particularly described and ascertained the nature of our invention
and in what manner it may be carried into effect, what we claim is :-
In the construction and arrangement of hold intercostal stringers and web frames
of vessels constructed on the intercostal and web frame principle, the employment
of special sections of iron or steel. in substitution of the combination of angles and
plates substantially as and for the purpose as herein before described with reference
to the accompanying drawings.
1000