Year: 1887

page_text: Date of Application, 1st Dec., 1887
Complete Specification Left, 31 Aug., 1883
Complete Specification Accepted, 5th Oct., 1888
1 DAVID WILSON of Millwood House Grays in the County of Essex Manager
Cement Works do hereby declare the nature of this Invention to be as follows:-
My invention consists in constructing the hulls of ships and certain other parts
thereof and boats barges mooring buoys and other like vessels in part or entirely of
metal and cement or concrete.
In constructing such vessels according to my invention or in constructing according
to my invention the parts of such vessels to which my Invention is applicable I form
a metal frame or skeleton of the required shape and size and coat it on both sides
with cement or concrete. The frame may consist in part or entirely of wire netting
or bars or rods or strips of metal interlaced or otherwise suitably secured together or
of metal in other suitable form and the frame may be coated with cement or concrete
either by pouring the cement or concrete into a mould of suitable size and form
in which the said frame has been placed or the cement or concrete may be otherwise
applied to the said frame. Where desirable or necessary the frames may be made
and coated in two or more parts and the several parts may be connected together
by any suitable means either before coating them or after they have been coated.
In some cases I secure india rubber or other yielding material to certain parts
of the vessels constructed as hereinbefore described and in some cases I use wire
netting or metal in other forms alone for the thwarts of boats and for certain other
parts of some of the vessels herein before referred to.
1001

page_text: COMPLETE SPECIFICATION.
Improvements in Ships, Boats, Barges, Mooring Buoys, and other
like Vessels.
1 DAVID WILSON of Millwood House Grays in the County of Essex Manager of
Cement Works 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 :-
My invention consists in constructing the hulls of ships and boats barges mooring
buoys and other like vessels in part or entirely of metal and cement or concrete.
In constructing such vessels according to my invention 1 form a metal frame or
skeleton of the required shape and size and coat it on both sides with cement or
concrete. The frame may consist in part or entirely of wire netting or bars or rods
or strips of metal interlaced or otherwise suitably secured together or of metal in
other suitable form and the said frame may be coated with cement or concrete either
by pouring the cement or concrete into a mould of suitable size and form in which
the said fraine has been placed or the cement or concrete may be plastered on or
otherwise applied to the said frame.
The said frame may be conveniently coated by placing a shield or shields on one
side thereof at a distance therefrom equal to the thickness required for the coating on
that side and then applying the cement or concrete to the other side by means
of tools such as are ordinarily used in applying cement or concrete to the surfaces
of walls and other surfaces. In this manner the space between the shield and the
frame is filled with the cement or concrete which passes through the interstices of
the metal framé and when the said surface is filled the required coating on the open
side of the frame is formed by applying a further quantity of cement or concrete
thereto. Where desirable or necessary the frames may be made and coated in two
or more parts and the several parts may be connected together by any suitable
means either before coating them or after they have been coated.
To provide for the connection of the several parts of the frame after they have been
coated I leave the portion thereof at and near the edges uncoated and after con-
necting the portions of the frame I coat the connections with cement or concrete.
1 prefer to arrange for the connections to be at those parts of the vessels where
bulkheads are required and I prefer to so form the connections as to produce flanges
projecting towards the inner part of the vessels to which flanges the frames of the
bulkheads may be conveniently connected. The frames of the Bulkheads may be
coated with cement or concrete either before securing them in place or after so
securing them. In the former case the junctions are coated with cement or concrete
after the frames have been secured.
In some cases I secure india rubber or other yielding material round the gunwale
or to the stem or at any other parts of any of the vessels made according to my
invention which are liable to violent contact with other vessels or bodies. The india

page_text: rubber may be secured by placing it in the required position on the frame and
afterward applying the coating of cement or concrete to the frame so as to leave
the surface of the rubber opposite to that which is in contact with the frame uncovered
and either flush with or projecting from the said coating.
In some cases I use wire netting or metal in other forms alone for the thwarts and
seats of boats and for other like parts of some of the vessels herein before referred to.
The strength required in the metal frame and the thickness required of the coating
varies according to the size of the vessel. For example in constructing a boat ten
feet long according to my invention netting of half inch mesh formed of No. 16
Birmingham gauge steel wire may be used for the frame and the coatings of cement
or concrete may be of such thickness as to make the entire thickness from surface to
surface one half of an inch. In constructing a barge of a carrying capacity of about
one hundred tons a frame of iron bars or hoop iron about one eighth of an inch thick
and one inch wide interlaced or otherwise suitably connected may be used for the
frame and the coatings of cement or concrete may be of such depth as to make the
entire thickness from surface to surface about two inches. In making the frame from
such bars I prefer to arrange them or some of them so that their broadest faces will be
in planes at right angles or thereabouts to the surfaces of the coatings. In all cases
1 make the coatings at and near the keel and stern and other angular portions of the
vessels somewhat thicker than at other parts.
The cement which I use in the manufactures herein described and referred to is
portland cement or other cement of similar nature and having similar properties and
the concrete which I use consists of such cement and either sea sand river sand slag
sand or pit sand or other sand or ground burnt clay (such as brick bats) or crushed or
finely disintegrated granite or other stone and I mix the said matters either with
water or with a solution of silicate of soda or silicate of potash or caustic soda. The
said matters may be used in the following proportions namely―
Cement about one part by bulk.
Sand about one part by bulk.
Water or a solution of silicate of soda or silicate of potash or caustic soda about
one tenth the joint weight of the cement and sand.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what 1
claim is :-
Constructing the hulls of ships and boats barges mooring buoys and other vessels
designed to be water borne in part or entirely of metal and cement or concrete
substantially as hereinbefore described.
1
1000
W. T. WHITEMAN,
Agent for the Applicant.