provements in the Construction of Buats.
Year: 1889

page_text: Date of Application, 17th Sept., 1889
Complete Specification Left, 17th June 1890-Accepted, 19th July, 1890
PROVISIONAL SPECIFICATION
Improvements in the Construction of Buats.
I, FRANOIS WENTWORTH BREWSTER, of Regent Street, in the County of Middlesex,
Manufacturer of Life Saving Appliances, do hereby declare the nature of my said
invention to be as follows:
This Invention consists in the construction of boats in longitudinal half-parts in the
hereinafter described improved manner.
In accordance with the present improvements each half-part of the boat is made
entire and integral with a longitudinal bulkhead, the pair of which when the half-parts
of the boat are secured together in a usable condition as a boat, divide the interior
of the boat from end to end into separate compartments, such bulkheads rising from
the bottom of the boat to the underside of the thwarts, or in any case rising above
the full-load water line. Each bulk-head is secured to the stem, keelson and sternpost.
of its half-part of the boat, and such half-part of the boat is built thereto; or the
timbers can be laid down whole and afterwards cut in two longitudinally of the boat
and the bulk-heads be subsequently applied thereto. I prefer that each such half-part
should be rendored unsinkable by the application thereto in any suitable manner of
the buoyant material known as
20 cork concrete for which Letters Patent No. 144
were granted to me dated the 4th day of January, 1888, preferably applying such
material in such a manner as will be effective in stiffening the boat and in counter-
acting any tendency of the sides to straighten.
32.
The aforesaid bulkheads offer peculiar advantages for the introduction of drop-keels
or centre-hoards, which can be made of any desired length and may be secured to
either half-part of the boat in such a manner as to work between the aforesaid bulk-
heads which act as a casing thereto when the parts of the boat are secured together,
and by such means the drop-keels or centre-boards can be applied and used without
requiring any additional room within the boat.
The two half-parts may be connected together at the keelband in any suitable way
and the connection may either be permanent or detachable and may extend the whol
length of such portion of the keelson as is straight excepting the distance required
for the drop-keel. The keel-band may be attached to one keelson in such a manner
as to project sufficiently to underlap the full width of the other keelson, and may be
either provided with stuils corresponding with holes in the other keelson, or with
clips adapted to receive the other keelson and keep the two parts in close contact, or
such object may be effected by permanent or detachable hinges or by any other
suitable means accordingly as it may be desired to stow the boat. The aforesaid
lower connection of the said half parts is firstly made, and then the upper portions
thereof are shut or brought together and locked at stem and stern by screws, clamps
or other suitable means, which, together with the attachment along the keels, will
make the boat perfectly cigid and sea-worthy.
Supplementary fastenings may be formed at each pair of opposite half-thwarts by
a movable top seat which will drop.down upon studs set in the upper side of the
thwarts, and long channelled clamps may also be fitted along the tops of the adjacent
bulkheads between the thwarts.
The mast may be either stepped at one side of the bulkheads or may be fitted with.
a forked foot so as to straddle the same.
The hinges of the radder may be attached to either half-part of the boat, but are só
formed as to hang the rudder dead amidships.
Boats constructed in accordance with the present improvements can be more
conveniently transported than boats as ordinarily constructed, and when connected
together at the keel may be used with advantage and convenience on shipboard in
[Price Sd.]

page_text: the following manner. The bulwarks between the davits may be removed so as to allow
the outer half of the boat to be attached to the davits in the ordinary manner at such
a height that when the boat is opened and the inner half lowered inboard it is
prevented from opening beyond a right-angle by the ship's deck upon which is a
suitable chock to receive it, and when so located the aforesaid longitudinal bulkheads
form the seat and back of a deck-seat..
The improved boats combine the strength of the ordinary whole built boat with
the portability of such contrivancès as collapsible boats and those built in transverse
sections.
Dated this 17th day of Sentember 1889
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Boats.
I, FRANCIS WENTWORTH BREWSTER, of Regent Street, in the County of Middlesex,
Manufacturer of Life-saving Appliances do hereby declare the nature of the 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 in the construction of boats in longitudinal half-parts in
the improved manner hereinafter described with roference to the accompanying
drawings, on which
Fig. 1, represents the half parts of the boat separate, and
Fig. 2, represents the boat in condition for use.
In accordance with the present improvements, each half-part of the boat is made
entire, vide Fig. 1, and integral with a longitudinal bulkhead, 3, rising from the
bottom of the boat to above the full load water line, the pair of such bulkheads, when
the half-parts of the boat are secured together in a usable condition as a boat,
vide Fig. 2, dividing the interior of the boat from end to end into separate
compartiments. Each bulkhead, 3, is secured to the stem, keelson and sternpost of
its half-part of the boat, and such half-part of the boat is built thereto; or the cross
timbers can be laid down whole and afterwards sawn or cut in two longitudinally of
the boat and the bulkheads as aforesaid be. subsequently applied thereto. I prefer
that each such half-part should be rendered unsinkable by the application thereto in
chambers, 14, under the side seats, 4, running fore and aft, in any suitable manner,
of the buoyant material known as cork concrete" for which Letters Patent, No. 144
were granted to me dated the 4th day of January 1888, preferably applying such
material by compressing it into such chambers, 14, or by applying moulded blocks
of such material to such chambers so as to be effective in stiffening the boat and in
counteracting any tendency of the sides to straighten.
The aforesaid bulkheads when set a little inwards of each half-part of the boat offer
peculiar advantages for the use between them of drop-keels or centreboards, which
can be made of any desired length and may be secured to either half-part of the
boat in such a manner as to work between the aforesaid bulk-heads which will' act
as a casing thereto when the parts of the boat are secured together.
The two half-parts may be connected together at the keelband, 5, in any suitable
way and the connection may either be permanent or detachable and may extend the
whole length of such portion of the keelson as is straight, excepting such distance
as may be required for the drop-keel, if applied. The keel-band may be attached
to one keelson, G, in such a manner as to project sufficiently to underlap the full
width of the other keelson, and may be either provided with studs corresponding
with holes in the other keelson, or with clips as, 7, adapted to receive the oil.er
keelson and keep the two parts in close contact, or such object may be effected by
permanent or detachable hinges or by any other suitable means accordingly as it
may be desired to stow the boat.
The aforesaid lower connection of the said balf-parts is firstly made and then the

page_text: upper portions thereof are shut or brought together and locked at stem and stern by
screws, clamps, or other suitable means, as at, 8, and which, together with the
attachments along the keels, will make the boat perfectly rigid and soa-worthy.
Supplementary fastenings may be formed at each pair of opposite half-thwarts, 9,
by a moveable top seat, 10, which may be fitted with studs, as, 11, engaging with
holes formed in the upper side of the thwarts, and long channelled clamps, 12, may
also be fitted along the tops of the adjacent bulk-heads between the thwarts,
vide Fig. 2.
The mast may be either stepped at one side of the bulk-heads or may be fitted
with a forked foot so as to straddle the same.
The hinges of the rudder, 13, may be attached to either half-part of the boat, but
are so formed as to hang the rudder dead amidships.
Boats constructed in accordance with the present improvements can be more
conveniently transported than boats as ordinarily constructed.
The improved boats combine the strength of the ordinary whole built boat with
the portability of such contrivances as collapsible boats and those built in transverse
sections.
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 I
claim is : :—
1. Constructing boats in longitudinal half-parts each integral with a longitudinal
bulk-head rising from the bottom of the boat to above the full load water line, as
set forth.
2. Constructing boats in longitudinal half-parts each integral with a longitudinal
bulk-head rising from the bottom of the boat to above the full load water line and each
rendered unsinkable by the application to side chambers running fore and aft of the
boat of cork-concrete compressed thereinto or of previously moulded blocks of such
material, as set forth.
3. In boats constructed in longitudinal half-parts, in combination; a longitudinal
bulk-head forined integral with each such half-part rising from the bottom of the
boat to above the full load water line; a keel band; clips and screws for fastening
the half-parts together along the keel and at the stem and stern; long channelled
clamps for covering and securing the adjacent longitudinal bulk-heads and moveable
covering seats, as set forth.
Dated this 17th day of June 1890.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C., Agents for the Applicant.