Improvements in the Construction of Ships and Boats.
Year: 1899

page_text: Date of Application, 12th June, 1899
Complete Specification Left, 12th Feb., 1900-Accepted, 9th June, 1900
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Ships and Boats.
I, DANIEL GEORGE MARTENS, of Christiania, Norway, at present residing at
7, Montague Street, Russell Square, in the County of London, Engineer, do hereby
declare the nature of this invention to be as follows:-
-
The object of this invention is to produce a ship or boat so constructed as to
be extremely steady and especially adapted for life saving purposes or for working
in heavy seas.
According to this invention I form each side of the boat with two longitudinal
inward curves, one commencing at or near the water line and the other at or near
the keel. Both curves meet at the bilge and here I reversely curve the lines of
the ship or boat so as to form a bilge keel in one with the side and bottom of
the vessel. The finished vessel has consequently a bilge keel on each side formed
by a convexity on the ends of two concaves or inward curves on the sides and
bottom of the vessel. These bilge keels I form tubular and open at their ends so
as to form water ballast tanks which fill when the vessel is launched and materially
aid the inward curves and bilge keels in maintaining the steadiness of the vessel
in heavy seas.
When constructing a life boat on these lines I make it with an inner and an
outer metal skin and fill in the intermediate space with a material such as cocoa-
nut fibre which will prevent water from filling the space if the outer skin should
be damaged. Also I make the boat in transverse sections each of which is com-
plete and floatable by itself and rivet all the sections together, so that if one
section is damaged the buoyancy of the others, fore and aft of it, is unaffected.
Dated this 12th day of June 1899.
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.
Improvements in the Construction of Ships and Boats.
I, DANIEL GEORGE MARTENS, of Christiania, Norway, at present residing at
12, Montague Place, Russell Square, in the County of London, 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:-
The object of this invention is to produce a ship or boat so constructed as to
be extremely steady and especially adapted for life saving purposes or for working
in heavy seas

page_text: In the accompanying drawings Fig. 1 is an elevation, Fig. 2 a plan and Fig. 3
a central transverse vertical section of a boat constructed according to this in-
vention.
In constructing the lines of the boat or ship I form each side thereof with two
longitudinal inward curves A and B, the curve A commencing at or near the
water line and the curve B at or near the keel. Both curves A and B meet at
the bilge and here I reversely curve the lines of the ship or boat, as shown at C,
so as to form a bilge keel in one with the side and bottom of the vessel. The
finished vessel has consequently a bilge keel on each side as shown in Fig. 3
formed by a convexity C on the ends of two concaves or inward curves A and B,
on the sides and bottom of the vessel. These bilge keels C, 1 form tubular and
open at their ends a a so as to form water ballast tanks which fill when the vessel
is launched and materially aid the inward curves A and B and bilge keels C in
maintaining the steadiness of the vessel in heavy seas.
When constructing a life boat on these lines I make it with an inner and an
outer metal skin A' A B B, and fill in the intermediate space with a material, D,
such as cork or cocoa nut fibre, which will prevent water from filling the space
if the outer skin be damaged. Also I make the boat in transverse sections each
of which is complete and floatable by itself and rivet all the sections together,
so that if one section is damaged the buoyancy of the others, fore and aft of it,
is unaffected.
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
-1 claim is :-
-
(1) A ship or boat having an open-ended bilge keel on each side thereof
formed by a convexity on the ends of two concavities or inward curves on the
sides and bottom of the vessel, substantially as described.
(2) A life boat having an open-ended bilge keel on each side thereof formed by
a convexity on the ends of two concavities or inward curves on the sides and bottom
of the boat, the boat being formed with an inner and an outer metal skin with
cork or other filling material between them and made in transverse sections,
rivetted together, substantially as described.
Dated this 12th day of February 1900.
F. W. GOLBY,
Patent Agent, 36, Chancery Lane, London, W.C.,
Agent for the Applicant.