Improved Means and Apparatus for Automatically Regulating the Speed of Propellers.
Year: 1889

page_text: Date of Application, 18th Dec., 1889
Complete Specification Left, 18th Sept., 1890-Accepted, 1st Nov., 1890
PROVISIONAL SPECIFICATION.
Improved Means and Apparatus for Automatically Regulating
the Speed of Propellers.
CORNELIUS STENSLAND Christiania Sweden Engineer do hereby declare the nature
of this invention to be as follows:-
:-
This invention has for its object the automatic regulation of the speed of ships
propellers. It is well known that the variation in the speed of propellers of ships
when in a heavy sea is great, which is caused by the propeller being wholly or
partly lifted out of the water, with the motion of the ship. When the propeller is
so exposed the resistance thereon is of course decreased which causes the engine
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race the result of
and consequently the propeller to work at a higher speed, or
which is to cause a vibratory motion unpleasant to the passengers.
The object therefore of this invention is to automatically cut off the steam and so
lessen the speed of the engine and propeller when the propeller is so exposed.
The regulator consists of a hollow swimmer which is placed movably in a vertical
direction on a hollow bar b which is cut through in the longitudinal direction so as to
give a slit f Fig. V in which the bolt g can be moved up and down. This bolt is
fastened to a ring which placed outside the tubo b.
Fig. IV shows swimmer with the ring in section. Fig. III shows a horizontal
cut of the swimmer and the tube from above. From the bolt y goes a connection to
the steam regulator over pulleys e and d; or if desired the motion of the float or
swimmer may be transmitted to the regulator hy means of bars or rods suitably
connected. Electricity may be employed for the connection between the float and
steam regulator. The down motion of the swimmer is effected by its own weight as
soon as it is above the surface of the water, and as it drops so it cut off the steam and
so lessens the speed.
In Fig. I the float or swimmer is fixed before the propeller, but in Fig. II
a modification is shown by which the float or swimmer is fixed after or the opposite
side of the propeller.
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COMPLETE SPECIFICATION.
Improved Means and Apparatus for Automatically Regulating
the Speed of Propellers.
CORNELIUS STENSLAND Christiania Sweden 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 has for its object the automatic regulation of the speed of ships
propellers. It is well known that the variation in the speed of propellers of ships
when in a heavy sea is great, which is caused by the propeller being wholly or partly
lifted out of the water, with the motion of the ship. When the propeller is so exposed
the resistance thereon is of course decreased which causes the engine and consequently
the propeller to work at a higher speed, or "race"
"the result of which is to cause a
vibratory motion unpleasant to the passengers.
The object therefore of this invention is to automatically cut off the steam and so
lessen the speed of the engine and propeller when the propeller is so exposed.

page_text: I now refer to the drawings left with my Provisional Specification.
The regulator consists of a hollow swimmer which placed and movable in a
verticle way on a hollow bar which is cut through in the longitudinal direction so
as to give a slit Fig. V in which the bolt g can be moved up and down. This
bolt.is fastened to a ring which is placed outside the tube.
Fig. 1V shows swimmer with the ring in section. Fig. III shows a horizontal
cut of the swimmer and the tube from above. From the bolt goes a connection
to the steam regulator over pulley and d; or if desired the motion of the float or
swimmer may be transmitted to the regulator by means of bars or rods suitably
connected to it; electricity may be employed for the connection between the float
and steam regulator. The down motion of the swimmer is effected by its own
weight as soon as it is above the surface of the water, and as it drops so it cuts
off the steam and so lessens the speed.
In Fig. I the float or swimmer is fixed before the propeller, but in Fig. II a
modification is shown by which the float or swimmer is fixed after or the opposite side
of the propeller.
Having now particularly described and ascertained the nature of my said invention
I declare that what I claim is
In steam ships the use of a floating regulator or swimmer which when the
propeller of a ship is wholly or partially elevated out of the water falls and by
means of a suitable connection, wholly or partially cuts off the steam from the engine
which operates the propelier substantially as described and for the purpose set forth.
Dated this 18th day of September 1890.
E. EATON,
Agent for Applic..nt.