Improvements in Propelling and Steering Apparatus for Ships.
Year: 1893

page_text: Date of Application, 9th Mar., 1893
Complete Specification Left, 13th Nov., 1893-Accepted, 30th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Propelling and Steering Apparatus for Ships.
I, EDOUARD MARIE CANNEAUX, of 15, Boulevard St. Denis, Paris, in the
Republic of France, Engineer, do hereby declare the nature of this invention to
be as follows:-
My invention relates to a new propeller to be used by steamships, in addition to
a two-bladed screw, the latter being especially employed for backing or going ahead
slowly when in harbour.
My improved propeller consists essentially of a rudder of sufficiently flexible
material in the form of a fish-tail, the shape and size of which may be varied to
suit different circumstances.
The object of my invention is to produce a much greater speed than with the
ordinary mode of propulsion by a screw.
In order to put my invention in operation, I arrange astern of the ordinary screw
propeller, a vertical shaft turning in bearings or sockets above and below and
having firmly attached to it at the back a plate of sufficiently flexible metal or
other material in the shape of a fish-tail, and serving both as a rudder and a
propeller. The upper end of the shaft is provided with a crank or lever connected
by a connecting rod with a shorter crank upon a vertical shaft set in revolution by
the engines so that when it is in revolution it causes the flexible fish-tail propeller
to oscillate backward and forward and propel the ship forward.
When the ordinary screw propeller is in use, the flexible one may be used as a
rudder, and a light rod or bar may be connected to the connecting rod which
actuates it and to an indicator at a convenient part of the vessel, which shews the
exact position of the flexible plate.
Dated this Oth dow of March 1902
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Propelling and Steering Apparatus for Ships.
I, EDOUARD MARIE CANNEAUX, of 15bs, Boulevard St. Denis, Paris, in the
Republic of France, 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 and accompanying drawing, that is
to say :-
My invention relates to a new propeller to be used in steamships, in addition to a
two-bladed screw, the latter being especially employed for backing or going ahead
slowly when in harbour.
The improved propeller, which is fitted at the stern of the ship, in the usual
position, consists of a flexible rudder having the form of a fish's tail, but the precise
shape and dimensions of which may be varied according to the circumstances in
which it is to be used. In order to complete the improved means of propulsion I
arrange, in combination with the rudder above described, a two-bladed. screw the
object of which is to move slowly, for the purpose of manoeuvring the vessel
backwards or forwards when in harbour.
The improved propelling devices have for their object to obtain, in the ships to
which they are fitted, a greater speed than has heretofore been practicable in screw-
propelled vessels.

page_text: The accompanying drawing is in illustration of my invention, and represents
a section through a ship fitted with my improved propeller. a is a vertical
shaft turning in bearings at the stern of the ship, and upon this shaft is fixed the
rudder having preferably the form of the tail of a fish. At the upper end of
the shaft a is fixed a levere carrying a pin d upon which is fitted one end of a
connecting rod e. The other end of this connecting rod is fitted upon a crank-
pin fixed or formed upon a vertical cranked shaft y. This shaft is driven by
gear h, h, actuated by the main engines of the vessel, so that a reciprocating move-
ment is communicated to the connecting rod e and, by means of the lever c, to the
shaft a and consequently to the rudder b.
The screw, fixed upon the shaft i, serves not only to propel the vessel backward
and forward, but also to stop it in case of need.
In order to indicate exactly the position of the rudder b, I fix upon the connecting
rode a light rod which connects the latter with an indicating needle m the
point of which corresponds with and shews the direction of the rudder.. This
indicating needle, placed in a convenient part of the vessel, can be always
observed in order to ascertain the position of the rudder when the screw is
moving astern.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. The combination of a rudder of suitable form fixed upon a vertical shaft, with
a lever and a connecting rod, actuated substantially, in the manner and for the
purposes described and illustrated.
2. In combination with the rudder arranged and actuated as described in the
first claim, the two-bladed screw, for the purpose of manoeuvring the vessel in
harbour, substantially as described and illustrated.
DL: 1911 Novemba 1902
EDWARDS & Co.,
Agents for the Applicant.