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Патент USA US2110017

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March L 193.
)5» C. GALBRAETH
2,11%,017
LIFEBOAT CONSTRUCTION
Filed. July 30, 1936
'INVENTOR
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Patented Mar. 1, 1938
2,110,017
1,“ umrEo STATES
PATENT OFFIE
2,110,017
LIFEBOAT CONSTRUCTION
' Armour O. Galbraith, Su?ern, N. Y.
1 Application July 30, 1936, Serial No. 93,330
3 Claims.
The invention the subject of this application,
consists ‘of means for improving the construc
(01. 9-6)
lifeboat and in the drawing the lifeboat is not
shown in detail, only su?‘lcient detail being shown
to emphasize my peculiar construction.
5
First, to increase the rigidity'of a lifeboat
The boat is of course provided with a gunwale
Second, to simplify its construction, and
"Third, to ‘directly strengthen the lifeboat
against certain destructive stresses which have
been ‘found existent in ordinary lifeboats.
I, longitudinal benches or seats 2, and a plural
ity of cross thwarts as shown at 3, 4, 5, 6, 7,
It will be noted
removed in Figure 1 another longitudinal bench
is provided.
’
1O
The members 9, II], II, l2, l3, and iii are
braces which extend from the gunwale to the
bench or thwarts and are for the purpose of
stiffening the sides of the boat and the members
15, I6, I1, I8, l9, and 20 are braces for support
ing the thwarts 3 to 'i inclusive of the longitudi
nal benches as shown at 2.
The boat that I have here shown is of metal,
no ribs are indicated as the thwarts and seat
braces
'
'
At 2!
terially reduced in weight.
25
Another decided advantage in the construction
which I am about
'
'
to indicate the stern of the boat. is shown merely
And now to refer to the details of my improved
construction. At 22 I show a particular form of
a continuous length of commercially available 25
“A” at the bow to the point “B” at the stern of
the boat and is bent or molded or shaped as 30
fered for supporting the
5
The following is what I consider the best means
of carrying out my invention and the accompany
ing drawing should be referred to for a complete
understanding of the speci?cation which fol
lows:
In the drawing:—
)
Figure 1 shows a longitudinal sectional view
shown at “C” and “D”, so that this continuous
length of T rail or T iron forms the bow, the
keel and the stern members.
The T rail is so placed that the stem of the
T extends upward and into the boat and the
cross arm of the T is exterior of the boat plat
mg.
The side
and 24 a
40
of a lifeboat.
Figure 2 is an enlarged fractured and sectional
View of the keel member and flooring.
Figure 3 is a fractured view of the interior
of the boat showing the plates secured to the
keel.
Figure 4 is a fractured view of the exterior of
the boat and is similar to the view in Figure 3;
and
Figure 5 is an end elevation of the end of the
keel member.
Similar reference numerals indicate like parts
in all the ?gures where they appear.
The boat which I have shown is an ordinary
supported by the cross arm of the T in such a
manner that the load in the boat is received by
the cross arm 22' of the T and not solely by the
good .boat will support a far greater load than
otherwise found possible.
Because of the change in the shape of the
plates to a pronounced V formation as they ap
proach both the bow and the stern of the boat, 50
so that the boat may more readily cleave the
water when propelled in either direction, the
cross arm 22' of the T rail is bent correspond
ingly inward at these points in order to conform
55
2,110,017
2
that the stem will not operate as a barrier run-v
to the necessary V plate formation and to pro
vide the maximum support for the plates. In
Figure 5 I have shown cross sections of the T
rail taken at several points as it approaches the
bow or stern and it will be noted therefrom that
ning longitudinally in the floor, but such details
the cross arm 22’ is bent progressively inward
the cross arm of the T.
or towards the stem of the T as it passes from
the horizontal keel section to the almost per
pendicular bow and stern portions.
It is one of the features of the invention that
the under or keel portion of this rail presents
a substantially flat surface to facilitate the slid
ing of the boat upon the sand when beached
whilst the integral bow and stern portions pre
sent a more salient angle so that the boat’s prog
15 ress will not be unnecessarily impeded.
The cross thwarts and longitudinal benches of
my boat are formed and arranged in the conven
tional manner and serve as beam or cross ship
supporting or stiffening members. The ?ooring
of the boat is however modi?ed to suit the new
conditions.
The flooring is formed of a plurality of remov
able and longitudinal plankings or footings as
shown at 26, which are in turn supported by a
plurality of lateral or cross braces or Z shaped
members as shown at 21. The footings 26 and
even the members 21 can be formed of wood if
desired, but I prefer that the members 21 be Z
shaped steel braces and the members 26 be wood.
The height of the top of the footings should be
equal to the height of the stem of the T 22 so
are mere matters of construction. I do how
ever desire that the T rail 22 be a stiff and rugged
rail and for this reason I have selected a rail
wherein the stem of the T is of greater width than
Having carefully and fully described my in
vention what I claim and desire to obtain is:
1. In a lifeboat, a T rail comprising integral 10
keel, bow and stern portions, the T being in
verted at the keel so as to present a substantially
?at lower surface, the lower cross arm of the T
being bent progressively inward towards the main
stem thereof so as to form a substantial V as it 15
approaches both the bow and the stern of the
boat.
2. In a lifeboat having side plates, a keel, a
bow and a stern, a continuous rail of T section
comprising said keel, bow and stern, the T be
ing inverted at the keel with the cross arm form
ing a support for the side plates as they abut the
main stem of the T, said rail having its cross
arm bent progressively inward as it approaches
both the bow and the stern.
3. In a lifeboat, a rail of T section integrally
forming the keel, bow and stem thereof, the cross
arm of the T being bent substantially back to
wards the main stem thereof as said rail ap
proaches the bow and the stern of said lifeboat. 30
ARMOUR C. GALBRAITH.
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