Year: 1888

page_text: Date of Application, 17th Jan., 1888
Complete Specification Left, 16th Oct., 1888
Complete Specification Accepted, 16th Nov., 1888
I, THOMAS VARLEY of West Marton near Skipton in the County of York Estate
Agent do hereby declare the nature of this invention to be as follows, that is to
say:
It relates to improvements in propellers for boats, ships or other vessels and consists
of forming, arranging and constructing said propellers and parts in connection
therewith, so that a greater degree of efficiency is obtained.
To attain this, a tube or cylinder is mounted lengthwise within the boat ship or
other vessel, at any suitable part below the water line; said tube or cylinder being
made to reach from the front to the hind part thereof.
Within this tube or cylinder is mounted and made to operate a suitably shaped
screw, which may be of a form similar to those already in common use in connection
with boats, ships or other vessels or it might be made continuous as a spiral flange
wound for a suitable distance around a shaft placed about centrally in said tube or
cylinder.
When this screw is rotated, water is drawn in at one end of the cylinder or tube
and forced out at the other by which means the vessel to which the cylinder is
attached, is propelled.
Any suitable driving gear may be employed for imparting rotary motion to
the screw, such as a vertical or a horizontal shaft driven by the engine of the vessel
and joined to the shaft upon which the above described screw is attached, by bevil or
other appropriately shaped wheels. Only requiring a reversion in the direction of
motion of this shaft in order to reverse that of the vessel.
:
An
A valve may be placed at or near each end of the cylinder or tube above named so
that when desired these may be closed to prevent the water from flowing through it,
in this manner allowing the screw to be removed therefrom for repairs etc.
opening is made in the side of the cylinder to allow said removal; said opening
being covered with an appropriate door or other covering when the screw is in
operation or when otherwise desired.

page_text: At right angles to the tube or cylinder above described, and at any suitable part
along its length, are attached other tubes, one or more being on each side thereof
but all being in or about the same plane and about parallel with each other, these
tubes on one side of said cylinder being directly opposite those on the other side.
A valve is placed in each of these lateral tubes so as to close same as may be
desired.
From this it will be seen that when the valves at the outer ends of the principal
cylinder are closed, those of the lateral cylinders being open, and the screw is rotated
the vessel will be propelled laterally.
By the rudder of the vessel to which the cylinder and screw above described are
attached, being placed in a suitable position for the water, when forced by the screw
through said cylinder, to strike or rush against it, the power of said rudder over
said vessel is greatly enhanced.
If desired, a rudder as above described may be placed at each end of the vessel
in suitable proximity with each of the outer openings in the cylinder by which
means the manoeuvering of the vessel is further facilitated.
Instead of placing the principal cylinder centrally in the vessel as above described,
two such cylinders with their screws may be employed, one being placed on each side
of the vessel as will be well understood.
Dated this 16th day of Januar 1808

page_text: I, THOMAS VARLEY of West Marton near Skipton in the County of York, Estate
Agent, 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, that is to say:
It relates to improvements in propellers for boats, ships or other vessels and consists
of forming, arranging and constructing said propellers and parts in connection
therewith, so that a greater degree of efficiency is obtained.
In order that this invention may be more readily understood I have hereunto
appended sheets of drawings illustrative thereof to which by figures and letters,
reference is made in the following description.
Fig. 1 is a sectional side view of a boat to which my invention is applied, figs. 2
and 3 are sectional end and top views of same, and figs. 4 and 5 are detail drawings
enlarged scale of parts hereinafter described.
The object of this invention is attained by mounting a tube or cylinder a lengthwise
within the boat, (ship or other vessel) at any suitable distance below the water line,
said tube or cylinder a being made to reach from the part 6' to the hind part b² of
said boat . Within this tube a is mounted and made to operate a suitably shaped
Screw c which be of a form similar to those already in common use in connection
with boats etc., or it might be made continuous as a spiral flange wound for a suitable
distance around a shaft c¹ placed about centrally in the tube a, the latter form being
the one preferably made use of, as is illustrated."
may
The outer ends of said flange are bent or formed somewhat hollow or dished in
order to increase their hold on the water.
When the screw c is rotated, water is drawn in at one end of the cylinder or tube a
and forced out at the other by which means the vessel to which this tube a is
attached, is propelled the direction in its motion being determined by the screw.
Any suitable driving gear may be employed for imparting rotary motion to the
screw c, by means of a horizontal shaft d (or if the position of the screw c is higher
within the vessel perhaps a vertical shaft may be more suitable as will readily be
understood) driven by the engine of the vessel and geared by the wheels e e¹ to the
screw c. The direction of motion of said screw determining that of the vessel only
requiring a reversion in the former to effect a reversion of motion in the latter.
Valves ff may be placed at or near the outer ends 61 62 respectively of the tube a
so that when desired these may be closed to prevent the water froming flowing
through said tube a, in this manner allowing the screw to be removed therefrom for
repairs etc., an opening is made in the upper part of the tube a to allow said
removal, said opening being covered with an appropriate door, or other covering
when the screw c is in operation or when otherwise desired. At right angles to the
ube a and preferably in the positions illustrated are attached other tubes g g¹ having
valves h h¹ respectively, for the purpose of propelling the vessel laterally this being

page_text: accomplished by the valves ff" being closed the valves h¹ being open and the
screw c rotated, causing the water to be drawn in at the opening g and forced out at
the opening g' with the desired result as will be readily understood.
By the rudder k being placed in a suitable position for the water, when forced by
the screw c through the tube a; to strike or rush against it, the power of said rudder k
over said vessel will be greatly enhanced.
In order to place the rudder in. the said suitable position it is hinged to rotate
about its central part so that it may be placed in either of the positions shewn in
broken lines fig. 3 in order that it may allow the water from the tube a to strike
or rush against it with its full force.. -.
If desired, a rudder as above described inay be placed at each end of the vessel in
suitable proximity with each end of the tube a by which means the manoeuvering of
the vessel will be further facilitated.
Instead of placing the tube a centrally in the vessel as hereinbefore described, two
such tubes a with their screws c may be employed one being placed lengthwise on
each side of the vessel, and about parallel with each other as will be well understood.
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:
1. The tube a, the screw e formed as described, the gearing e e¹, shaft d and the
vessel or boat b in combination, the same being arranged and constructed to operate
substantially as and for the purpose specified.
2. The tubes a and g g₁, the screw c and its driving gear, the valves ffl and h h³,
the rudder k and the vessel 6 in combination the same being constructed and arranged
to operate to the end herein specified.