AN IMPROVED METALLIC BOAT AND APPLIANCES THEREFOR and
Year: 1886

page_text: I HENRY FREDERICK COOMBS of the city of St. John in the province of
New Brunswick Dominion of Canada Merchant, Temporarily residing at
No. 16 Bute Street in the city of London county of Middlesex, do hereby
declare the nature of my invention for AN IMPROVED METALLIC BOAT AND
APPLIANCES THEREFOR and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :—
The first part of my invention relates to the construction of boats out of sheets
of metal or other suitable material whereby the same can be constructed cheaply
and rapidly. The invention consists in a boat formed of one, two or more plates
made into two longitudinal boat-half sections provided with flanges and united by
rivets, bolts, screws, solder or other means. The flanges when united form the
stem, keel and stern in boats pointed at both ends; in square end boats a stern
piece is fitted and a flange turned on its outer or inner side which flauge is
rivetted to the ends of the two longitudinal boat halves, which united, form the
outer hull of the boat. The plates that form the sides of the boat are pressed
between suitable dies in such a manner that they will obtain the shape of the
longitudinal half of a boat, that is one half part of the boat one side of the keel.
Two such sections are placed together in such a manner that their flanges will be
in contact and are then rivetted or otherwise fastened together. In order to
strengthen the boat a plate of material is firmly fastened between the two half
sections, or to the bottom by a flange which has been turned on its bottom edge.
It is to be understood that this centre plate shall extend either from the stem to
the stern longitudinally so as to divide the boat into two separate tight
compartments, or extend from a bulk head at bow to a bulk head at stern. The
molds or dies for pressing the plates can be of any desired shape, the plates
can be pressed or rolled to shape in one or more opperations. To this description.
of boat is added square, half round or oblong tubes extending the full length of
the boat and fastened to the upper exterior side and edge of the boat so as to
form a hollow gunwale or fender. Also the addition of an interior tight shell or
ceiling attached to the exterior boat by suitably arranged strips so that the space
'between the two hulls shall form a series of tight compartments.
The interior shell or ceiling is secured to the outer or main boat by strips of

page_text: their lower edges which flange is fastened to the exterior hull, a similar flange is
turned on the upper side, to this the interior hull is fassened. It is to be
understood that these ribs extend across the boat, it is intended that these ribs
shall be molded so as to fit any boat made on the same molds for which they were
intended. At the gunwale a piece or strip of metal is fitted, being made to
conform to the shear of the boat. Flanges are turned on the edges of this strip of
metal, which flanges are fastened to the upper interior edges of the inner and
outer hulls, thereby closing the opening. At the bow and stern of this boat air
chambers are fitted, these are built separate and are made to fit the bow and stern
of the boat; the wide ends of these air chambers are made slanting towards the
bow and stern so as to offer the greatest possible resistance to the action of
a breaking.sea. These air chambers are made in two sections of which the cone
or upper part is removable. They are made to occupy the whole space at bow and
stern, or made in halves to allow keelson to pass between.
Metal tubes of any desired diameter extend longitudinally above or beneath the 1
thwarts and in the centre; these can extend the whole length of the boat if
desired. The ends of these tubes are fitted into sockets, which sockets are
fastened to bulkheads at each end of the boat. One of these sockets is hinged at
its centre so as to allow of tubes being easily removed. These tubes are preferably
made in sections which fit on to each other, each section, being perfectly tight.
A piece of cork is fitted between the edges of the boat and the tubes laid along
the side of the boat. And a piece of wood is fitted along on top of the gunwale.
The rowlock is formed of a strip of metal made to a half circle, this is the oar
bed, which is fitted on to the end of a bolt or pipe and made to revolve; the bolt
is threaded or outherwise fitted into a nut of any desired shape, so as to fit the
gunwale of a boat. A pinching screw is provided and the vertical bolt is slotted
to receive the end of the pinching screw. Another pinching screw is provided
which being fitted into the lower side of the nut, which for this purpose has
flanges, holds the nut to the gunwale. Where it is desirable to have the row-
locks always remain on the boat, the nut can be simply a flat plate fastened to the
top of the boats gunwale; by the use of the threaded or sliding bolt the oar bed
can be raised or lowered to suit the rower.
Reference is to be had to the accompanying drawings forming part of this
specification in which Figure 1 is a side view of my double hulled boat. . 2, is a
longitudinal section of boat as it would appear if divided in centre, 3 is a section
view of stern end of boat at the junction of traverse bulkheads, 4 is a section view
of bow end of boat, 5 is a view of section of double hull showing side tubes
hollow gunwale and cork cushion all in position also section of covering strip.
6, is a view of locking device for securing ends of moveable tubes in place.
A is the exterior of hull or main boat. B is the flanges that united form stem,
keel and stern.
C is the rivets or fastenings uniting flanges.
D is the bread and water vessels.
E is the longitudinal air tubes.
Mouner tubes fitted in bottom.
H is the two air chambers also as H 1.
I is the slanting bulkheads which form one end of the air chambers.
J is the cork cushion or wedge which fits in the cavity between the gunwale 5
and the tube E. K is the interior hull or tight ceiling. L is the flanged strip
which unites the top edges of outer and inner hulls. M is the half round, square,
or oblong tube attached to the boat by suitable devices and placed so as to
strengthen boat and form part of the gunwale: O is the clamp socket to secure
the longitudinal air tubes. P1 is the rowlock made adjustable so as to be screwed 5
un to any desired height

page_text: 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
I claim is
1st. A double hulled boat made of metal or other pressed material, also the
starboard and port longitudinal boat sides A, pressed in dies or rolled and united
together through the flanges B.
2nd. In combination in a boat such as that described the air tubes E and cork
wedge or cushion J.
3rd. The locking device O provided with hinges 01 and thumbscrew O2 for
securing the tubes E.
4th. In a boat made of two longitudinal pressed boat sides, the longitudinal
plate F secured between the two boat sides.
5th. In combination with a double hulled boat a slanting end to air chambers
also the construction of portable air chambers rounded or flat, fited in sections at
the bow and storn of a boat such as that described.
6th. The covering strip L for the purposes described.
7th. In a boat such as that described the square, half round, or oblong tube M.
8th. The rowlock P, with threaded or plain shank, flanged nut with shank
slotted and pinching screws, all and in combination for the purposes set forth
and described.