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Патент USA US3092862

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June 11, 1963
3,092,852
R. F. DEV EREUX
INHERENTLY STABILIZED DEEP SEA FLOATING OBSERVATION STATIONS
Filed Feb. 15, 1957
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Patented .I‘une 11, 1963
3
2
FIGURE 1 is a vertical section of a ballasted cylin
3,092,852
INHERENTLY STABILIZED DEEP SEA FLOATENG
QBSERVATIGN ?TATlONS
Robert F. Devereux, Del Mar, Caiif.
(5636 Linda Rosa, La Jolie, Calif.)
drical hull embodying my invention, showing the same
in upright position as normally located in the sea, with
about one-tenth of said hull protruding above the water
line thereof;
FIG. 2 is a greatly reduced view of the hull shown in
Filed Feb. 15, 1957, Ser. No. 640,356
3 Claims. (Cl. 9-8)
FIG. 1, showing the attachment of said hull by radiating
extending lines to ?oats located below the level of the
sea, and the mooring of said ?oats to concrete anchor
towers or spar hull stations, particularly as oriented to 10 blocks resting upon the ocean ?oor, and FIG. 3 is a sche
inherent stabilization against oscillations of the surface
matic view or graph illustrating the distribution of ocean‘
of the sea imposed upon or against said stations; and its
wave energy as expressed in wave periods exerted by
My invention relates to ?oating deep sea observation
general purpose is through utilization of pre-determined
size, length, diameter, proportions, ballasting, and water
wind and gravity, and periods created by storms, earth
quakes and tides.
displacement of the station, to conform to a ratio coin 15
Referring to the drawing, the hull 4 is of metal or
ciding with or exceeding the minimum surface wave
other suitable material and is in the form of a gigantic
energy normally exerted upon said station with about 25
elongated hollow cylindrical structure, somewhat resem
seconds periodicity; thereby effecting an upright obser
vation station that is practically motionless, even in storm
bling the oceanographer’s spar-buoy wave staff, but greatly
differing therefrom in size, construction, function and
waves, and while anchored to the bottom of the ocean. 20 water displacement, so that any tendency to vertical and
The problem of providing a substantially steady ?oat
ing platform in the deep sea for observations made there
lateral movement of the said hull, through action of the
waves, while immersed in the ocean, is greatly minimized
from, by scientists and other occupants situated thereon,
or rendered practically negligible; any periodic motion
has been a perplexing question, and so far as I know is
of the hull being made to coincide with or to exceed the
at present unsolved, except as solved by my present in 25 minimum of surface-wave energy in the region of twenty
vention. Efforts to stabilize passenger liners, using gyro
?ve seconds period.
Necessarily the said hull, to fulfill the requirements of
attest to the fact that conventional surface hulls are de
my invention, should be at least approximately six hun
?cient in this respect. Subsurface craft are somewhat
dred feet in length, at least approximately twenty feet in
more satisfactory because of their ability to remain below 30 diameter, with length to diameter ratio approximately
stabilizers, deilectable bilge-rudders, tuned tanks, etc.,
surface wave influence. In such case, problems of control,
30:1, and the wall 5 of the hull should be of substantial
only partly solved by forward motion of the craft, con
found investigations with not only the original motions
thickness or at least approximately one inch in thick
Be
ness. As shown, the hull 4 is divided perpendicularly
into three separated chambers or compartments, namely,
level of the sea, its utility for the purposes of my inven
tion is limited or precluded.
the observers and the crew, and also as providing storage
but with motions peculiar to the submarine itself.
cause access to the surface is difficult from a submarine 35 (1) the upper chamber 6, extending vertically about
located at a depth of one hundred feet or more below the
one-third of the length of said hull and comprising the
upper portion thereof and serving as living quarters for
My invention primarily consists of an uprightly dis
space for drinking water, food, fuel, supplies, and equip
posed cylindrical spar hull twenty feet or more in di 40 ment; (2) the long middle chamber 7 extending vertically
ameter, and six hundred feet or more in length; the wall
nearly two-thirds of the length of said hull, and located
of said hull being about one inch in thickness, and about
below said upper chamber, said middle chamber serving
two-thirds of the said hull being ballasted and closed off
as a sea water ballast tank, to which said water is ad
below, leaving the upper one-third of the said huil open
mitted thereto or expelled therefrom through the sea
to provide a living space for the occupants, and for stor
cock 8; and (3') the comparative small chamber 9 lo
age of food, fuel and equipment, so that said hull will
cated at the extreme lower‘ end of the hull below the
be upright in the water and about one-tenth of the upper
middle chamber, and permanently sealed and ?lled with
part of said hull will normally extend above the level of
concrete or other heavy ballast.
the sea upon the immersion of said hull.
The complete ballasting of the hull, usually is accom
My invention further consists in attaching the inner
ends of radially extending mooring lines to said hull
intermediate, to the top and bottom thereof, and below
plished after the empty hull, ballasted only by the ballast
of chamber 9, has been towed horizontally into the de
sired location at sea, and before being anchored as here
the level of the sea, the outer ends of said mooring lines
inafter set forth. At such time the sea-cock 8 is opened
being fastened to floats deeply immersed in the water and
55 and sea water ‘allowed to flow in and to ?ll or nearly
secured by anchor lines to anchor blocks resting upon the
to ?ll the chamber 7, the pressure of the air therein and
I
the opening or closing of said cock being regulated or
My invention further consists in other novel features
controlled by any suitable means well known in the art
of construction, and combinations and arrangements of
and operated from the upper chamber 6, and thereupon
elements and parts illustrated in the drawing, and here 60 the hull is placed in upright position in the sea, and the
inafter more particularly described and claimed.
chamber 6 loaded with supplies and equipment, and
Reference is hereby made to the accompanying draw
conditioned for occupancy as above set forth. There
ing, illustrating a preferred form of my invention, in
after, the amount of sea water ‘ballast in the chamber is
which similar numerals of designation refer to similar
carefully adjusted and regulated so that approximately
65 only one-tenth of the longitudinal length of the hull
parts throughout the several views and in which—
bottom of the sea.
3,092,852
4
3
will extend above the level of the sea. In this situation
and from this construction and arrangement of parts,
together with the aforesaid ballasting thereof, it follows
that periodic energy, being applied to the dynamics of
the hull in vertical motion at or near the bottom thereof,
or at least 540 feet below the surface of the sea, results
in the hydrodynamic ?ltering or attenuation of the en
ergy coming from the surface Waves, thereby rendering
the hull practically motionless even in storm waves when
onds.
if one plots surface wave energy (as in the ver
tical ordinate in FIG. 3) against period (the horizontal)
ordinate, it becomes at once evident that not only is
there very little energy beyond 20 seconds period, but
there is a pronounced minimum in the region of 25 sec
ends, as indicated in FIG. 3. Here wave height, for ex
ample, probably never exceeds a few centimeters or milli
meters even in great storms at'sea.
Because my invention is “tuned” to nesonate ‘(to have
anchored in the deep ocean. From yactual experiments 10 a natural period of oscillation) of 25 seconds, in vertical
motion, through carefully selected proportions, and be
conducted by me, I have discovered that any wave staif
cause of the natural attenuation of surface wave energy
hull larger than twenty feet in diameter and six hundred
with increase in depth, its response to the in?uence of
in length having a natural period of vertical motions of
waves even at its natural period of motion is very small.
twenty-?ve seconds or more will always be quite stable
even in the presence of most violent storm conditions 15 This may be taken as the worst possible eventuality; its
response to waves of shorter period is even less, regard
at the surface of the sea; that is, the said hull may be
less of their greater energy content, because of the “Q”
larger than twenty feet in diameter and six hundred
or selectivity of the hull as a resonant system and also
feet in length, and correspondingly more than approxi
because of the increase in natural attenuation of wave
mately ?fty-?ve hundred tons displacement, as long as
the proportions of the hull allow a natural period of 20 energy at depths with decrease in wave period. (Short
period waves cannot send their energy very far down
vertical motion of twenty-?ve seconds or more; ‘but a hull
smaller than a basic hull of this size, even though its
in the ocean.)
The hull conforms to the rise and fall of the sea surface
natural period be twenty-?ve seconds, will not achieve
of a period greater than 25 seconds with only the attenua
successful results because there will not be su?icient
depth at the bottom of the hull to take advantage of the 25 tion of energy with depth to minimize this motion. But
because these long-period oscillations never exceed a
natural attenuation of wave energy, produced as afore
few centimeters in amplitude this in?uence may 'be ne
said by the greater construction.
glected, or allowed for by mechanical adjustment (as in
Preferably, for greater utility I detachably secure,
the case of oil well drilling) because of the long time
by bolts or other well known means of attachment to
the top of the upper chamber 6, the penthouse 10, in 30 involved in the oscillations. Adjustment may also be
made for tides (which seldom exceed the height of a foot
the form of a flat cylindrical structure of the same ma
or so in deep water in the open ocean) and the rate 'oc
terial as that of the hull 4, and having a working plat
form 11 serving as a roof for said house, and as a land
currence of seismic sea waves (also of the order of the
height of a few inches or feet in the deep ocean) because
ing surface for helicopters. Also, the said house may
provide better living quarters for the observers and crew, 35 of the long time available to ‘bring about the adjustment,
especially when automatic equipment is used to accom
‘and better facilities for observation and use of equip
ment, and as a landing stage for those going to and from
plish the adjusting.
The natural period of horizontal or angular motion’ of
the hull (corresponding to pitch or roll in conventional
As shown in FIG. 2, the spar hull 4 may be anchored
to the ?oor of the ocean and held in desired location 40 seacraft) is much greater than its natural vertical period,
placing it far beyond the reach of surface Waves of sig
by the mooring means there illustrated. For such pur
ni?cant energy. As a result, its response in this kind
poses, I weld or otherwise ?rmly secure outside of and
of motion is very small indeed.
'
to the wall of the central portion of said hull the metallic
My invention may be embodied in other speci?c forms
eyelets 12, three or more in number, and equally spaced
apart around said hull. To said eyelets and radially ex 45 without departing from the spirit or essential character»
istics' thereof. The present embodiment as above set
tending therefrom are secured the inner ends of the moor
forth is, therefore, to be considered in all respects as
ing lines 13, the outer ends of which are attached to an
illustrative and not restrictive, and scope of vmy inven
choring lines 14 leading to the ?oats 15 and to the spaced
tion being indicated by the appended claims rather than
anchoring blocks 16, resting upon ?oor of the sea. The
?oats 15 are preferably hermetically sealed metallic 50 by the foregoing description, and all changes which may
come within the meaning and range of equivalency of
spheres, and normally are deeply immersed in the ocean
the claims are therefore ‘intended to be embraced therein. '
water, and therefore virtually unaffected by surface wave
What I claim and desire to secure by Letters Patent is:
action, and through their connection by mooring lines
1. An inherently stabilized deep sea ?oating observa
14 to the hull 4 and by anchoring lines with the blocks
16, serve to keep said hull from drifting and to co-op 55 tion station, comprising a cylindrical spar hull not less
than six hundred ‘feet in length, of substantially constant
erate therewith in maintaining the same in substantially
the station, and for replenishment of supplies.
upright motionless position.
' Because of the immobility of my improved spar hull
diameter with length-to-diameter ratio approximately
30:1, ‘and having a natural period of oscillation for ver
tical motion of ‘about 25 seconds; said hull being thereby
thereof asv above described, my invention may not only 60 inherently stabilized against vertical oscillation due to
secured through the special construction and anchorage
be made available for observation and scienti?c pur'
poses, but also it may readily be moved and set up in
the ocean for aiding in the drilling of oil Wells and min
ing below the sea level in the ocean ?oor, and in the dis
posal of the products thereof.
Referring to FIG. 3, illustrating the distribution of
wave energy as produced ‘by wind and gravity, storms,
earthquakes and the tides, the following considerations
are to beborne in mind:
surface wave action; said hull partitioned above to form
a living space for human occupants; and the space below
being ballasted to maintain said hull, when introduced in—
to the sea, in an upright position with the upper portion
65 thereof projecting to a substantial extent above the level
of'the sea.
2. A deep sea ?oating observation station, comprising
a cylindrical spar hull not less than six hundred feet in
Generally, the ocean presents a continuous spectrum 70 length, with length-to-diameter ratio approximately 30:1,
and having a natural period of oscillation for vertical
of surface wave energy ranging in periods from a frac
motion of about 25 seconds, said hull being thereby
tion of a second, as in small capillary waves or ripples, to
several minutes or even hours, as in the case of seismic
inherently stabilized against vertical oscillation due to
surface wave action; said hull being ballasted to maintain .
sea waves and tides. By far the greatest concentration
of surface-wave energy lies in the region of 5-15 see 75 said hull when introduced into the sea in an upright
3,092,852
5
position with the upper portion thereof projecting to a
and deeply submerged in the sea and substantially unaf
substantial extent above the level of the sea.
3. The subject matter of claim 2, and means for an
fected by surface Wave action.
choring comprising simultaneously tautened mooring
lines radiating from and attached to a central portion 5
of said hull, ?oats deeply immersed in the sea, said ?oats
'being secured to said mooring lines, anchoring blocks
resting upon the bottom of the sea, and anchoring lines
secured to and ‘between said ?oats and blocks, whereby
the ?oats are held vertically above said anchoring blocks 10
References Clted m the ?le of this patent
1,840,324
2,203,894
2,214,453
2,687,017
2,777,669
UNITED STATES PATENTS
Lindquist ___________ __ J an,
Cooke ______________ __ June
Creed _______________ __ Sept.
GerWick ____________ __ Aug.
Willis et a1. __________ __ Jan.
12,
11,
10’,
24,
15,
1932
1940
1940
1954
1957
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