Year: 1887

page_text: Date of Application, 28th Mar., 1887
Complete Left, 2nd Dec., 1887
Complete Accepted, 6th Jan., 1888
I HENRY EDWARD NEWTON of the Office for Patents, 6 Bream's Buildings,
Chancery Lane in the County of Middlesex, Civil Engineer, do hereby declare the
nature of this invention to be as follows :-
This invention consists in a novel combination of screw propellers for vessels,
whereby the drag of the back water, or its resistance to the propulsion of the vessel,
is to a great extent obviated; and it further consists in a novel combination with two
screw propellers, arranged one before another on the same shaft in the stern of the
vessel, of two rudders arranged between the two propellers, the said two rudders
being suitable for use separately, or in combination with a rudder arranged like that
commonly employed for steering screw propelled vessels.
Now according to this invention, four screw propellers are employed, two screw
propellers being secured one behind the other upon one shaft, which occupies a
central position in the vessel, like the shaft of the single screw propeller commonly
used. The principal propeller occupies the same position as the single propeller
commonly used, that is to say, in an opening between the stern post and the solid
portion of the structure of the vessel forward thereof. The second propeller, which is
some distance forwards of principal propeller, works in an opening provided in the
bull forward of the solid portion or post. The second propeller may be somewhat
smaller than the first one.
Two auxiliary screw propellers have separate shafts, which are arranged in the same
horizontal plane some distance above the main propeller shaft, and at equal distances
from the horizontal centre of the vessel. The said propellers are arranged on the
ends of their shafts entirely outside of the hull, but some distance forward of the
second propeller. Their diameter is so much smaller than that of the main propeller,
that their blades, when in their highest position, are at about the same level as are the
ends of the blades of this propeller when in their highest position. One of the

page_text: auxiliary propellers has its blades of right hand, and the other its blades of left hand
pitch, and their shafts are intended to be so geared with each other and with the main
shaft, or to be so driven, that the auxiliary shafts will rotate in opposite directions.
The hull of the vessel is made quite full immediately in front of the auxiliary
propellers, in order to protect their blades.
A rudder like that commonly employed in screw propelled vessels is arranged
outside of the stern post, and two rudders, each constructed like a single rudder, are
arranged one on each side of the post or solid structure of the vessel between the
openings in which the first and second screw propellers work. These two rudders,
when not in use, lie flat against the side of the post, and parallel with the longitudinal
centre of the vessel. The post is constructed with recesses for the reception of the
two rudders, so that they may be brought flush with the exterior of the vessel.
These two rudders may be worked by steering apparatus of any known or suitable
kind.
By the employment of a number of propellers forward of the stern post, and at
different distances therefrom, two in the centre of the vessel, one before the other, and
two further forward on opposite sides of the centre of the vessel, and above the central
propellors, almost the entire body of water aft of the submerged portion of the vessel
is caused to be acted upon by the propellers with good propulsive effect, and the drag
of the back water, which is prejudicial to the propulsive effect of screw propellers
applied according to the usual methods, is obviated.
The position of the two rudders, arranged one on each side of the post or solid
structure between the two central propellers, renders then very effective under all
circumstances, whether used alone, in cases when no main rudder is provided, or
whether used in combination with, and at the same time as the main rudder, or
whether applied to a vessel as supplementary rudders, not to be used until some
accident happens to the main rudder.
DAL: Bei
1007

page_text: COMPLETE SPECIFICATION.
Improvements relating to the Propulsion and Steering of Vessels.
I HENRY EDWARD NEWTON of the Office for Patents, Bream's Buildings,
Chancery Lane in the County of Middlesex, Civil 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 consists in a novel combination of screw propellers for vessels,
whereby the drag of the back water, or its resistance to the propulsion of the
vessel, is to a great extent obviated; and it further consists in a novel combination
with two screw propellers, arranged one before another on the same shaft in the stern
of the vessel, of two rudders arranged between the two propellers, the said two
rudders being suitable for use separately, or in combination with a rudder
arranged like that commonly employed for steering screw-propelled vessels.
Fig. 1 in the accompanying drawing is a side view of the after part of a vessel,
having this invention applied.
Fig. 2 is a stern view of the same.
Fig. 3 is a plan in the line of Fig. 1.
Similar letters of reference designate corresponding parts in the several figures.
A designates the hull of the vessel, and B, C, D, D¹ designate four screw
propellers. The two screw propellers B, C are secured upon one shaft a, which
occupies a central position in the vessel, like the shaft of the single screw propeller
commonly used. The propeller B occupies the same position as the single propeller
commonly used, that is to say, in an opening e, between the stern post and the solid
portion d, of the structure of the vessel forward thereof.-The propeller C, which is
some distance forwards of that B, works in an opening e provided in the hull forward
of the solid portion or post d. The latter propeller may be somewhat smaller than the
first one, and is so represented.
The two screw propellers D D¹ have separate shafts g g', which are arranged in the
same horizontal plane, some distance above the propeller shaft a, and at equal distances
from the horizontal centre of the vessel.-The said propellers are arranged on the ends
of their shafts entirely outside of the hull, but some distance forward of the
propeller C.-Their diameter is so much smaller than that of the propeller B, that
their blades, when in their highest position, are at about the same level as are the
ends of the blades of B when in their highest position. One of the said propellers D D¹
has its blades of right hand, and the other its blades of left hand pitch, and their
shafts g g are intended to be so geared with each other, and with the shafts a of the
propellers B. C, or to be so driven, that the said shafts g g' will rotate in opposite
directions.
The hull of the vessel is made quite full, as shown at h in Figs. 2 and 3, immediately
in front of the propellers D D¹, in order to protect their blades.
E designates a rudder like that commonly employed in screw-propelled vessels,
arranged outside of the stern post b.-F F' designate two rudders, each constructed

page_text: like a single rudder arranged one on each side of the post or solid structure d of the
vessel between the openings ce in which the two screw propellers BC work. These
two rudders, when not in use, lie flat against the side of the post d in the position
in which F is shown in Fig. 3, and parallel with the longitudinal centre of
the vessel. The said post d is represented in Figs. and 3 as having constructed
in it recesses ii for the reception of the two rudders F F, so that they may be
brought flush with the exterior of the vessel. These two rudders may be worked by
steering apparatus of any known or suitable kind.
By the employment of a number of propellers, forward of the stern post, and at
different distances therefrom, two in the centre of the vessel, one before the other,
and two further forward on opposite sides of the centre of the vessel and above
the central propellers, almost the entire body of water aft of the submerged portion
of the vessel is caused to be acted upon by the propellers with good propulsive
effect, and the drag of the backwater, which is prejudicial to the propulsive effect
of screw propellers applied according to the usual methods, is obviated.
The position of the two rudders FF, arranged one on each side of the post or solid
structured between the two central propellers B C, renders them very effective under
all circumstances, whether used alone, in cases when no such rudder as E is provided,
or whether used in combination with and at the same time as the rudder E, or whether
applied to a vessel as supplemental rudders, not to be used until some accident happens
to the rudder E.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to
me by uny foreign correspondent, 1 declare that what I claim is :-
1. The combination in a vessel with two screw-propellers and one shaft arranged
centrally to the vessel, and having the said propellers arranged upon it one before the
other, of two other screw propellers and separate shafts therefor, arranged above and
forward of both of the central propellers at equal distances from the centre of the vessel
on opposite sides thereof, substantially as and for the purpose herein set forth.
2. The combination in a vessel, with two screw-propellers arranged one before the
other in separate openings provided in the stern of the vessel, with a post or solid
structure between them, and a shaft central to the vessel and common to both
propellers, of two rudders arranged between the two propellers, one on each side of
the said post or solid structure, substantially as and for the purpose herein described.
Dated this 2nd day of December 1887.
NEWTON & SON,
Agents for the Applicant.