IMPROVEMENTS IN PROPELLING SHIPS OR VESSELS
Year: 1882

page_text: LETTERS PATENT to George Fellows Harrington of Northwood House Ryde
Isle of Wight Gentleman for an Invention of IMPROVEMENTS IN PROPELLING
SHIPS OR VESSELS
PROVISIONAL SPECIFICATION left by the said George Fellows Harrington
at the Office of the Commissioners of Patents on the 29th August 1882:
GEORGE FELLOWS HARRINGTON of Ryde in the Isle of Wight Gentleman
"IMPROVEMENTS IN PROPELLING SHIPS OR VESSELS"
My Invention relates to improvements upon my former Invention for placing
screw propellers near the bows of Vessels so as to utilize the water they displace
for propelling them, for which I obtained Letters Patent dated July 24th 1877
N° 2813. It also relates to my Provisional Specification dated September 3rd 1880
No 3582 for placing propellers in the channels of Twin-hull Vessels to work by
means of descending shafts to propel such Vessels by raising the water between
their hulls, but as the downward action of such force tends to depress their bows,
my further improvements consist of a collar made either of steel or some other
metal, keyed on the propeller-shaft to revolve with it at an angle of about
20 degrees below a horizontal line, which collar I purpose calling the "Propeller-
shaft-thrust-ward" and a wheel made either of steel or some other metal secured
to the vessel, with its rim in contact with the upper part of the angular end of the
"propeller-shaft-thrust-ward" to receive the force of the thrust, and to revolve on a
shaft with an axis about 20 degrees above a horizontal line, which wheel I purpose
calling the Propeller-thrust-Wheel. By this arrangement, as the action of the force
expended will be in a direction about 20 degrees below a horizontal line, and as
the reaction of such force will be in a direction about 20 degrees above a horizontal
line, and as such action and reaction will be equal and opposite such force will
resolve itself into a horizontal line to propel the Vessel, and as in this case a thrust-
block will be unnecessary friction will be considerably less than it is in cases where
thrust-blocks are used

page_text: The foregoing explanation applies to propelling Vessels forwards, but as such
Vessels will occasionally have to be moved backwards, and the action and reaction
of the force expended reversed, a second propeller-thrust-Wheel will be placed and
secured to the Vessel so as to receive the force of the thrust from the opposite lower
angular end of the propeller-shaft-thrust-ward
By placing the Propeller between the Hulls near the bows to relieve them of a
large quantity of the water they displace and to meet a regulated supply of dense
water, as per my patent of July 24th 1877 N° 2813, by causing the propeller to
raise the water it acts upon to the middle of the Twin-hull channel and shaping
the Hulls to receive such water as it falls towards their sterns to aid in impelling
the Vessel as per my provisional Specification of September 3rd 1880 N° 3582
combined with causing the action and reaction of the Engine force expended to
resolve into a horizontal line to propel the Vessel, and substituting the Propeller-
shaft-thrust-ward and the propeller-thrust-Wheel, for the usual thrust-block to
lessen friction, as herein explained, great steadiness and rapid speed will be
obtained

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Fellows Harrington in the Great Seal Patent Office on the
28th February 1883.
GEORGE FELLOWS HARRINGTON of Northwood House Ryde Isle of Wight
'IMPROVEMENTS IN PROPELLING SHIPS OR VESSELS"
My Invention relates to improvements upon my former Invention, for placing
Screw propellers near the bows of Vessels so as to utilize the water they displace
for propelling them, for which I obtained Letters Patent dated July 24th 1877
N° 2813. It also relates to my Provisional Specification dated September 3rd 1880
No 3582 for placing propellers in the channels of Twin-hull Vessels to work by
means of descending Shafts to propel such Vessels by raising the water between
their hulls. But as the downward action of such force tends to depress their bows,
my further improvements consist of a collar B, made either of Steel or some other
metal, keyed on the propeller shaft to revolve with it at an angle of about Twenty
degrees below a horizontal line, which collar. I purpose calling the "Propeller-shaft-
thrust-ward" and a wheel A made either of Steel or some other metal, secured to
the Vessel so as to revolve with its rim in contact with the upper part of the front
angular end of the propeller-shaft-thrust-ward, to receive the force of the thrust, and
to revolve on a shaft with an axis inclining about Twenty degrees above a horizontal
line, which wheel I purpose calling the propeller-thrust friction-wheel. By this
arrangement, as the action of the force expended will be in a direction about
Twenty degrees below a horizontal line, and as the reaction of such force will be
in a direction about Twenty degrees above a horizontal line, and as such action and
reaction will be equal and opposite, such force will resolve itself into a horizontal
line to propel the Vessel, and as in this case, what is known as a thrust-block will
be unnecessary, friction will be considerably less than it is in cases where thrust
blocks are used. The foregoing explanation applies to propelling Vessels forwards,
but as such Vessels will occasionally have to be moved back wards, and the action
and reaction of the force expended reversed, a second propeller thrust friction
wheel C will be placed and secured to the Vessel so as to revolve and receive the
force of the thrust from the opposite lower angular end of the propeller-shaft-thrust-
ward, as shewn in the accompanying Drawings
By placing the propeller near the bows to relieve them of a large quantity of the
water they displace and to meet a regulated supply of dense water as per my
Patent of July 24th 1877 N° 2813, by causing the propeller to raise the water it
acts upon towards the middle of the twin-hull channel and shaping the hulls to
receive such water as it falls towards their sterns to assist in impelling the vessel,
as per my provisional Specification of September 3rd 1880 N° 3582, combined with
causing the action and reaction of the Engine force expended to resolve into a
horizontal line to propel the Vessel, and substituting the propeller-shaft-thrust-
ward, and the propeller thrust-friction-wheels for the ordinary thrust block to lessen
friction, as herein explained, considerable increased speed will be obtained
But what I claim by this patent to be new, and improvements upon my former
inventions, as explained in the other patents herein named, consists of arranging
propeller-shaft-thrust-wards, and thrust-friction wheels, so that the downward

page_text: actions and the upward reactions of the Engine power expended shall resolve
into horizontal lines to propel Vessels, as herein described, with the right to modify
details.
In witness whereof I the said George Fellows Harrington have hereunto set
my hand and seal this twenty sixth day of February One thousand eight
hundred and eighty three
Signed sealed and delivered
by the above named George
Fellows Harrington in the
presence of
JOHN WILSON TINDELL
Ryde Solicitor
February 26th 1883.
G F HARRINGTON (L.S.)