Year: 1890

page_text: Date of Application, 19th Feb., 1890
Complete Specification Left, 8th Nov., 1890-Accepted, 19th Feb., 1891
No text detected.

page_text: or more parts, either sold or made of corrugated sheet shaped on the lower or
outer edge to the curve of the keel cutwater etc., and extending from the top of the
cutwater downwards along the keel, as far as the top of the stern post covering the
flanges on each side of the boat, so as to completely overlap the flanges of each
half boat shell., The clamp shall have a width sufficient to permit of the bolt
or rivet heads and nuts, being sunk into a hollow indentation in the metal
leaving a suitable margin upon the upper or inner edge to grip, if necessary,
into a corrugation of the boat's side, and give the whole additional strength.
It is placed outside the flanges stuffing and keel of each half boat holding the
two halves firmly together when the bolts or rivets are put through the holes and
fastened. Each complete boat requires two keel clamps except "expedite " boats,
when flat rings or washers will answer. "Expedite" boats are those put together
in a few minutes only for temporary service. The particular use of these keel
clamps is to shield in a hollow, the points, washers, and nuts of the bolts and rivets,
also to protect the flange edges and other projections from abrasion, or fouling
with weeds etc., and thus facilitate the taking of the boat to pieces, for repacking,
transportation, or for repair. Where longitudinal seats or thwarts are admissible,
an inner skin or longitudinal bulkhead formed in the same manner as the shell
of the boat, may be secured along each inner side the space between this skin
and the shell forming a buoyancy chamber which cannot be filled by water
washing into the boat, and also serving as a protection if the shell should be
broken by collision or otherwise. This inner skin may likewise be formed with
corrugation to give strength to the structure, and with flanges at its edges, and
ends whereby it can be riveted or secured in any way, to, an attachment to or to
the shell itself of the boat, or the said buoyancy chamber may run transversely or
athwart the bows or stern or both and secured as above, any of which may be
fitted with manholes with water-tight covers or lids so that the interior of the
chamber might be used for a receptacle. The top rods which are separated
by blocks placed between them, the strake or strakes, also the gunwale and
rowlocks of the boat are connected with the fore and aft chucks. These
together with the cutwater, stern post, thwarts and their supports, and the sheets
are all connected together and rest mainly upon the keel and form a wooden
framework that will give additional rigidity and support to the boat, assist in
taking the shock of the collision, in meeting any impact from above or elsewhere
upon the gunwale, and in bearing the strain of propulsion. Ordinary boats'
accessories, such as thwarts and their supports rowlocks, and outer top strake
backed, and an inner top strake and the like, may be attached to this wooden
frame in any convenient manner. The half boat may be made in any form and
of such a shape and with such additions, that the bow, stern and gunwale are
in the same horizontal plane, so that when the half boat is placed upon the
ground, the keel flange upwards it will rest upon these parts, or the boat com-
plete may be so constructed as to have its bow and stern much higher than its
gunwale, so as to allow it to be fitted with air chambers fore and aft, and provided
with water-tight manholes, if necessary, and thus adapted as a life boat, be
capable of righting itself when upset while afloat. The outer edge of the keel
and ends of the boat, may be protected by any suitably formed moulding. The
boat may be formed upon any lines for the purpose for which it may be required.
Dated this 19th day of February 1890.
CASTLE SMITH,
Invention" Office, 54, Fleet Street, London, E.C.,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Sheet-metal Boats.
We, JAMES WHITE, of Church Street, Harrington, in the County of
Cumberland, Shipwright, and JOHN GEORGE HENRY HILL, M.A., Rector of
Quarley, Andover, Hants, Clerk in Holy Orders, 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 :-
,'
The object of this invention is to construct boats of sheet metal which shall be
far more economical in building and repair than similar boats constructed of wood,
which shall be light, portable, easily packed in quantities and otherwise specially
adapted for transport and "up country" voyages, and which can be readily put
together, and taken to pieces when screw bolted, in a very short time.
Sheet metal boats according to this invention are formed by pressing or
hammering sheets of metal to the required shape, the body being made in halves,
or in quarters, or other vertical sections which transversely united together form
halves and which are then joined together longitudinally.
In the accompanying drawings
Figure 1 shews a side elevation of a half boat constructed in accordance with
this invention;
Figure 2 is a transverse section taken on the line X Y Figure 1;
Figure 3 is a sectional end elevation of a boat made in halves in accordance
with this invention;
Figure 4 is a cross section of the bottom of a boat having a U shaped keel
shoe G; and
Figure 5 is a transverse section of a modification.
The requisite stiffening is principally obtained by ribs, beads, flanges, indenta-
tions, or corrugations D (hereinafter called corrugations) either combined or
separately formed, impressed in, or in any way constructed on the metal. These
corrugations may take the place of the ordinary ribs used in the building of boats
and may run longitudinally of the body or may be inclined in any direction, being
placed by preference along the gunwale, but may be placed in any part where the
strain exists. The body of the boat may be further stiffened and protected by
running molten metal into the indented corrugations or by riveting, bolting,
soldering, or fastening in any other suitable manner, pieces of corrugated sheet
metal on to the outside or the inside of the shell, and these said pieces of corrugated
sheet metal may be fastened over or inside the corrugations D constructed on the
shell of the boat so that where necessary, additional protection may be afforded
against the effects of friction or strain, and the shocks of collision may thus be
taken by double or thickened corrugations. Each half of the boat or quarter or
other section is struck out of one piece of metal and a flange F is formed all round
the bottom and ends which may be flat as shewn or corrugated if required, or
otherwise strengthened.
To secure a tight joint between the two halves of the boat, and the aforesaid
parts or elsewhere where required, soft material C such as tar composition or india-
rubber or prepared felt may be run in or placed between the two surfaces, as shewn
in Figure 3. The keel may be formed of the flanges F, which together with the
cutwater and stern post may be covered with metal, as shewn and hereafter
described with reference to Figure 4, or it may be made of metal wood, or other
suitable material, or of wood covered with metal, or partly of wood and partly of
metal. It may be made in one part or in more parts "scarfed'
or fitted at one or
both ends between the flanges F. If the keel consists of any rigid material or is
made of wood, or of any combination containing wood, tar composition may be run
in, or an india-rubber or similar packing may be placed between the keel and the
flanges of the shell to save the wear of the metal or the wood or other rigid material
and secure a tight joint. The keel cutwater and stern post are made of wood or
"

page_text: A metal
any other suitable material simple or composite to which is affixed the said flange
by rivet bolts, screws, or it may be fastened in any other suitable manner.
rod or bar may be fastened to the lower side of the keel to protect the wood from
abrasion. The keel shoe G (see Figure 4) is made of metal or other rigid material
in one or more parts either solid or made of corrugated sheet shaped on the
lower or outer edge to the curve of the keel cutwater etc., and extending from the
top of the cutwater downwards along the keel, as far as the top of the stern post
covering the flanges F on each side of the boat, so as to completely overlap the
flanges of each half boat shell, as shewn in Figure 4. The keel shoe G may if
desired be furnished on the outside with longitudinal projections or protuberances
on each side of a length sufficient to permit of the bolt or rivet heads and nuts A
being sunk between two adjacent protuberances or projections on or in the metal so
that the heads of the bolts and the nuts will thus be protected from weeds and
from abrasions, or blows of any kind, and will thus be prevented from working
loose. These projections or protuberances are not shewn in the drawing to avoid
complication. The keel shoe G is placed outside the flanges F, stuffing C and
keel of each half boat holding the two halves firmly together when the bolts or
rivets A are put through the holes and fastened.
Where longitudinal seats or thwarts are admissible an inner skin or longitudinal
bulkhead formed in the same manner as the shell of the boat may be secured along
each inner side, the space between this skin and the shell forming a buoyancy
chamber which cannot be filled by water washing into the boat, and also serving as
a protection if the shell should be broken by collision or otherwise. A transverse
section of such a boat is shewn in Figure 5. This inner skin H may likewise be
formed with corrugations D' to give strength to the structure, and with flanges F¹
at its edges and ends whereby it can be riveted or secured in any way to an attach-
ment to, or to the shell itself of the boat, or the said buoyancy chamber may run
transversely or athwart the bows or stern or both and be secured as above, any
of which may be fitted with manholes with water-tight covers or lids so that the
interior of the chamber might be used for a receptacle.
The boat complete may be so constructed as to have its bow and stern much
higher than its gunwale, so as to allow it to be fitted with air chambers fore and
aft, and provided with water-tight manholes, if necessary, and thus adapted as a
life boat, be capable of righting itself when upset while afloat. The outer edge of
the keel and ends of the boat may be protected by any suitably formed moulding.
The boat may be formed upon any lines for the purpose for which it may be
required.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim -
A sheet metal boat made in longitudinal halves or sections and corrugated,
constructed substantially in the manner described and for the purpose stated.
Dated this 2nd day of February 1891.
cr
CASTLE SMITH,
Invention" Office, 54, Fleet Street, London, E.C.,
Agent for the Applicants.