JB Applying a Screw or Twin Screws for Propelling Sailing Vessels which can be Hoisted Inboard when without taking the Screw the s or Interfering with the Ship's Steerage Power when under Canvas alone and in any Weather. IN USE WITHOUT TAKING WITH
Year: 1885

page_text: .JB
Applying a Screw or Twin Screws for Propelling Sailing Vessels
which can be Hoisted Inboard when not in use without
taking the Screw off the shaft or Interfering with the Ship's
Steerage Power when under Canvas alone and in any
Weather.
I WILLIAM. ZEALAND of Number 257 Bay Street North, in the City of Hamilton
in the County of Wentworth in the Province of Ontario in the Dominion of
Canada, Master Mariner do hereby declare the nature of the said invention for
APPLYING A SCREW OR TWIN SCREWS FOR PROPELLING SAILING VESSELS WHICH
CAN BE HOISTED INBOARD WHEN NOT IN USE WITHOUT TAKING THE SCREW OFF
THE SHAFT OR INTERFERING WITH THE SHIPS STEERAGE POWER WHEN UNDER
CANVAS ALONE AND IN ANY WEATHER, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
My invention consists in applying a screw or twin' screw having two or more
blades to sailing vessels for propelling them in calms rivers or harbours in such
manner that a propeller can be readily put in use in any weather, or removed or
hoisted in-board when not required, without unshipping the same, weakening the
construction of the vessel- or effecting the steering when under canvas alone; the
invention can be applied to vessels of any size or tonnage and worked by any
approved kind of engine which can be placed in the after hold, clear of the cargo
space; the boiler can be on deck or other suitable place where it can also be used
to, work the donkey engine and for other purposes for which it may be required;
the advantages of my invention will be appreciated especially in voyages where
long calms follow heavy gales, and with my invention when not in use the
propeller can be hoisted inboard so that it will not present any drag or resistance
to the sailing of the ship when under canvas alone..
I am aware that there are auxiliary screws now used which work in an aperture
between the stern post and rudder and which can be taken off the driving shaft
and lifted up out of the water but this "aperture" between the stern post and
rudder materially, interferes with the steering power of the rudder when the ship is "
under canvas alone, often resulting in collision, and loss of the vessel. But with

page_text: my invention the propeller and shaft can be lowered down from inboard and set in
motion in the time required to get up steam, and when not in use, it is simply
hoisted inboard and the aperture in the stern closed up leaving no impediment to
the ships progress nor interfering with her steering.
My invention can be used to work with the steam power of the ordinary donkey
boiler on deck if required, which would give sufficient propelling power to steady
the ship in calms after heavy gales, and for entering harbours and for similar
purposes.
I will now describe my invention and the operation thereof to enable those
skilld in the art to make and use the same, with reference to the annexed drawings
in which Figure 1 is a partial longitudinal section through the centre of the ship
and Figure 2 is a stern view of a portion of a ship having my invention applied
thereto.
Similar letters of reference refer to similar parts in the several views.
When the screw or propeller is in motion, it will be seen by the drawings that
the shaft A with which the screw L revolves, extends out through the stern of the
ship in the pipe B a sufficient distance from the stern post to allow the screw to
turn clear of the ship's side, but does not project out so far as the stern post, and
is entirely clear of the rudder, it also extends inboard, revolving in the disc C, and
terminating in the coupling D, where it connects with the crank shaft E, which is
turned by the action of the connecting rod F, in the working of the engine; the
stuffing boxes G for the disc C to work on the pin I on its bearings in the
quadrant W and the stuffing box G³ for the shaft to work in the disc C are to
prevent the ingress of water, and are both packed from inboard in an accessable
place; the thrust block H resists any inward action of the shaft (the quadrant W
is firmly secured to the ships run).
The disc C works on the pin I on which it turns when the shaft A is raised up
or lowered down as required, there is a link X which connects the disc C with the
coupling D to hold the shaft A in its position and prevent it from sliding down
when hoisting it inboard.
K is a water tight reservoir built to the ship's inside into which the screw L is
raised by means of the rod M working in the stuffing box N one end of which rod
is connected with the outer end of the propeller shaft A the other end being
secured on board and by which rod is also lowered down on the bearing 6 (and is
held there) this bearing O is secured to the outside of the ship by the braces P-
the reservoir K has the opening on the outside covered by a falling (or sliding)
shutter R worked by a rod S from deck and is braced or strengthened on the
inside by moveable braces worked by screws on deck and the opening U into
which the shaft A rises is closed by a shutter U₁ hinged on the inside and worked
by rods Z in stuffing boxes with screw and lever, the stern pipe shutter Y is
similarly fitted and worked but is only closed when the shaft A is hoisted up thus
there is no opening left on the outside and the ship's lines are fair and without
any impediment except the braces P but these are set feather edged on the ship's
lines.
The operation of my invention is as follows namely-To set the propellor in
motion raise up the shutter R open the shutters U¹ and Y lower the shaf A on the
bearing O secure the rod M couple the shaft with the crank E apply steam and set
the propeller in motion, the shutters R and U' being closed, the reverse being done
to hoist the screw L inboard as described; when twin screws are used there may
be one engine working two cranks or two engines may be used where ships are
required to be quickly turned.
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 combination and arrangement of the several parts, or their eqivalents, 1
whereby the screw or propeller L on the shaft A can be raised un inhoard when

page_text: not in use, and lowered down to work in the bearing O when required substantially
as herein shown and described.
9
2. The disc C working on the pin I in the quadrant W having the shaft A fitted
through it, and the stern pipe B in connection with the coupling D and crank
shaft E to set the screw L in motion substantially as herein shown and described.
3. The screw shaft A in connection with the stern pipe B, disc C, stuffing box G¹
and G outside bearing O, lifting rod M and the reservoir K for raising the screw
inboard or lowering it down as required substantially as herein shown and
described.
4. The combination and arrangement of one screw, or twin screws with the
several parts above set forth in connection with an engine or engines and steam
from the boiler on deck, or a boiler in any other place to propel the vessel, and all
operating substantially as and for the purposes herein set forth.
WILLIAM
ZEALAND.
By Harris & Mills,
23, Southampton Buildings,
Agents.
Dated this 31st day of August 1885
WILLIAM ZEALAND.
By Harris & Mills,
23, Southampton Buildings,
Agents.