Improved Means for Reducing the Rolling of Vessels at Sea, and to Prevent or Lessen the Liability of Yachts and Pleasure or other Boats to Capsize.
Year: 1891

page_text: Date of Application, 21st Mar., 1891
Complete Specification Left, 19th Dec., 1891-Accepted, 23rd Jan., 1892
PROVISIONAL SPECIFICATION.
Improved Means for Reducing the Rolling of Vessels at Sea, and to
Prevent or Lessen the Liability of Yachts and Pleasure or other
Boats to Capsize.
We, EVAN ROWLAND JONES, of Cardiff in the County of Glamorgan, United
States Consul, and JOHN ANTHONY ROWE, of 68 Hampton Road, Forest Gate,
in the County of London, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention has reference to improved means for reducing the rolling of
vessels at sea, and to prevent or lessen the liability of yachts, and pleasure or other
boats to capsize.
For this purpose there is applied to each side of the vessel, yacht or boat (herein-
after included in the term vessel), a number of troughs channels or tubes (hereinafter
referred to as troughs) arranged at or near the water level. These troughs are
open at both ends, and may be open at the top, but in order to prevent them being
broken in stormy weather at sea, it is advantageous to close them in on their upper
sides, so that they then become tubes. The arrangement is such that when the
vessel rolls the troughs into the sea, the troughs become filled with water, and on
the return roll, this water is lifted above the normal water level, the whole of it
being discharged by the time the vessel reaches the limit of the upward roll.
To facilitate the discharge of the water from the troughs in a direction towards
the vessel's stern, the troughs are slightly inclined to the water level, the forward
ends being higher than the after ends. Or, to effect the same object, the after ends
of the troughs can be made deeper than the forward ends, the upper sides of the
troughs being arranged parallel or approximately so to the water level.
The length of the troughs, their shape, and their inclination to the water level,
are preferably such as to make the vessel perform a maximum amount of work,
with a given capacity of trough.
In addition to the inclined troughs there may be also applied to each side of the
vessel and below the water level other troughs. These are by preference arranged
parallel to the water level so as to offer practically no resistance, except surface
friction, to the passage of the vessel through the water.
We do not confine ourselves to any particular form of transverse section of trough,
but to avoid the heavy shock to the hull that is experienced by a vessel whilst
rolling violently, when fitted with projections standing at right angles to its sides,
it is preferred to make the outer boundary of the troughs of curved form.
The troughs are made, in number and size, suitable to the vessel's displacement-
weight, and rolling period. When the former is large and the latter small, the
troughs are of large capacity, but in short lengths. When the vessel's displace-
ment-weight is small, or her rolling period great, the troughs will be made of
relatively small capacity, but in comparatively long lengths.
Troughs fitted below the water level when applied to life-boats, yachts, rowing
boats and the like, serve to reduce the risk of such boats capsizing through sudden
gusts of wind, or the incautious movements of persons therein, from one position to
another. As in this case it is a disadvantage to lose the weight of the water in
these troughs, they are by preference made in shallow sections or as groups of tubes
to impede the outflow of water.
Troughs fitted to the bottom portion of any kind of vessel will increase the
rolling period thereof and thus make her safer at sea, and more comfortable.
The troughs can be so attached to the sides of the vessel or boat that they can

page_text: be readily removed when necessary, as in crowded waters, or when entering docks
and other places in order to prevent their being damaged by contact with other
vessels, quay walls, or other objects.
In some cases, as for small pleasure boats, there may be only one trough at each
side, below the water level.
The trough or troughs may be so arranged as to be wholly or partly within the
hull of the vessel or boat the ends being of course open to the sea.
Dated this 21st day of March 1891.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
Improved Means for Reducing the Rolling of Vessels at Sea, and to
Prevent or Lessen the Liability of Yachts and Pleasure or other
Boats to Capsize.
We,
EVAN ROWLAND JONES, of Cardiff in the County of Glamorgan, United
States Consul, and JOHN ANTHONY ROWE, of 68 Hampton Road, Forest Gate,
in the County of London, Engineer, 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:—
This invention has reference to improved means for reducing the rolling of vessels
at sea, and to prevent or lessen the liability of yachts, and pleasure or other boats
to capsize.
For this purpose there is applied to each side of the vessel, yacht or boat
(hereinafter included in the term vessel), a number of troughs channels or tubes
(hereinafter referred to as troughs) arranged at or near the water level. These
troughs are open at both ends, and may be open at the top, but in order to prevent
them being broken in stormy weather at sea, it is advantageous to close them
in on their upper sides, so that they then become tubes. The arrangement is such
that when the vessel rolls the troughs into the sea, the troughs will become filled
with water, and on the return roll, this water will be lifted above the normal water
level and tend by its weight to prevent the vessel rolling in the opposite direction,
the whole of the water being discharged by the time the vessel reaches the limit of
the upward roll.
In the accompanying drawings
Figs. 1, 2, and 3 are respectively a side view, plan, and a front or bow view of a
vessel provided at its sides with troughs according to this invention for reducing
the rolling of such at sea.
A, A are metal plates of curved form fixed in any suitable manner to the sides
of the vessel at or near the normal water level and so as to form with the sides of
the vessel troughs or tubes that are open at the ends to admit of the free entry and
exit of water for the purpose mentioned.
To facilitate the discharge of the water from the troughs in a direction towards
the vessel's stern, the troughs may be slightly inclined as shewn to the normal
water level, the forward ends being higher than the after ends. Or, to effect the
same object, the after ends of the troughs can be made deeper than the forward
ends the upper sides of the troughs being arranged parallel or approximately so to
the normal water level as shewn at A' in Fig. 1.
The length of the troughs, their shape, and their inclination to the normal water
level, are preferably such as to make the vessel perform a maximum amount of
work, with a given capacity of trough.

page_text: In addition to the inclined troughs there may be also applied to each side of the
vessel and below the water level other or supplementary troughs B. These are by
preference arranged parallel to the water level so as to offer practically no resistance,
except surface friction, to the passage of the vessel through the water.
We do not confine ourselves to any particular form of transverse section of
trough, but to avoid the heavy shock to the hull that would be experienced by a
vessel whilst rolling violently if fitted with projections standing at right angles to
its sides, it is advantageous to make the outer boundary of each of the troughs A, A¹
and B of curved form in cross section. The cross sectional form of trough we
prefer to employ is shewn in Fig. 3 where it will be seen that the upper part is
bulged outward and the lower part gradually tapers to the side of the vessel so as
to easily enter the water.
The troughs are made, in number and size, suitable to the vessel's displacement-
weight, and rolling period. When the former is large and the latter small, the
troughs are of large capacity, but in short lengths. When the vessel's displace-
ment-weight is small, or her rolling period great, the troughs will be made of
relatively small capacity, but in comparatively long lengths.
Troughs fitted below the water level as at B when applied to life-boats, yachts,
rowing boats and the like, serve to reduce the risk of such boats capsizing through
sudden gusts of wind, or the incautious movements of persons therein, from one
position to another. As in this case it is a disadvantage to lose the weight of the
water in these troughs, they may advantageously be made in shallow sections or as
groups of tubes to impede the outflow of water.
The troughs can be so attached to the sides of the vessel or boat that they can
be readily removed when necessary, as in crowded waters, or when entering docks
and other places in order to prevent their being damaged by contact with other
vessels, quay walls, or other objects.
This may conveniently be effected as shown in side elevation in Fig. 4 by pro-
viding the troughs at their corners with projections C adapted to slide in guides D
which are rivetted or otherwise secured to the side of the ship against which the
projections rest. The troughs are inserted between the guides and allowed to slide
down the same into their proper position and rest upon turned-in portions C¹ of the
guides. A screwed bolt or pin E is then passed through the flange of each guide D
as shewn to prevent the trough rising. The guides D are formed of metal plate of
such a thickness as not to close the ends of the troughs to any serious extent.
Where two or more removable troughs are arranged one above the other as in
Fig. 1, the corner projections of each lower trough are made shorter than those of
the troughs immediately above the same, and stop pieces or rests are provided in the
guides Cupon which the projections rest, these stops or rests being situated so as
to engage with the stops of the particular trough they are intended to support but
being sufficiently far from the edge of the guide to allow the shorter projections on
the lower troughs to pass the same.
-
In some instances the inclined troughs may be advantageously arranged as shewn
in Fig. 5, each trough overlapping the other. In this manner a large number of
troughs may be very compactly arranged on each side of the vessel.
Instead of using troughs that project from the sides of the vessel as in Figs 1, 2
and 3, a series of troughs, channels or passages may be used formed or built in the
vessel, flush with the outer side thereof as indicated in end and side view at F
in Figs. 6 and 7 respectively, the openings at the extremities F' of each of the
troughs channels or passages being rounded or smoothed so as not to interfere
with the entrance or outflow of water. Or the troughs channels or passages may
be partly within the hull of the vessel and partly outside thereof.
In some cases, as for small pleasure boats, there may be only one trough at each
side of the boat below the water level.
The trough or troughs may be so arranged as to be wholly or partly within the
hull of the vessel or boat the ends being of course open to the sea.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. A navigable vessel provided at each side with one or more troughs, channels
or tubes arranged at or slightly above the water level and open at the ends, the
arrangement being such that when the vessel rolls in one direction the troughs
channels or tubes will become charged with water which when the vessel rolls in
the opposite direction will be lifted 'above the normal water level and tend by its
weight to check the rolling of the vessel, the water escaping through the ends of
the troughs, channels or tubes, substantially as hereinbefore described with reference
to the drawing annexed.
2. A boat or vessel having at each side one or more open ended troughs channels
or tubes arranged so as to be normally below the water level substantially as
hereinbefore described with reference to the drawings annexed for the purpose
specified.
3. A boat or vessel having removable troughs channels or tubes constructed and
arranged as herein before described with reference to and shewn in Fig. 4 of the
accompanying drawings.
Dated this 19th day of December 1891.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.