Improvements in Ships' Logs for Indicating or Recording the Speed of Steamships or other Maritime Vessels.
Year: 1889

page_text: Date of Application, 23rd July, 1889
Complete Specification Left. 16th Dec.. 1889-Accepted: 18th Jan., 1890
PROVISIONAL SPECIFICATION.
Improvements in Ships' Logs for Indicating or Recording the
Speed of Steamships or other Maritime Vessels.
A communication from abroad by ALBERT HEBERLE, of Ueberlingen, Grand Duchy of
Baden, Empire of Germany, Watchmaker (Wirth & Co. Agents).
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E. of the Agency for Foreign
Patent Solicitors 6, Lord Street, Liverpool and 6, Bank Street Manchester both in
the County of Lancaster and 323 High Holborn in the County of Middlesex, Civil
Engineer, do hereby declare the nature of this invention to be as follows:-
Ships' logs have hitherto generally been constructed on the Woltmaun principle.
They are subject to great friction and therefore register badly at a low speed.
This invention comprises a horizontal waterwheel, with movable paddles, which are
raised by the pressure of the water.
In one arrangement the frame is composed of flat sides or walls. The wheel with
its axle is mounted in this frame. The former comprises two metal discs connected
by a metal cylinder. The paddles or blades are hinged onto this cylinder between the
two discs.
The current of water is first introduced by a bent portion of the outer frame or
casing under the paddles or blades, and raises them as soon as they have passed beyond
the end of the said bent part. The blades when raised rest against pins which are
fastened to one of the discs aforesaid and so tend to turn the wheel.
The current of water is cut off from one half of the wheel by the wall of the casing
so that the paddles gradually fall flat while passing through the still water enclosed
by the casing or frame, and pass underneath the deflecting plate and are then raised
again by the current of water.
The apparatus may be fastened on any part of the ship but must be placed
relatively to the direction of the current.
In paddle steamers the apparatus must be placed somewhere in front of the
paddles.
If it is wished to measure the distance run when the ship is steaming astern, the
apparatus should be fixed so as to be reversible.
A tube is attached to the apparatus through which a prolongation of the axis of the
wheel can be carried to the deck or other part of the vessel where it will work a
suitable registering dial.
•
Dated this 22nd day of July 1889.
WM. P. THOMPSON & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Ships' Logs for Indicating or Recording the
Speed of Steamships or other Maritime Vessels.
A communication from abroad by ALBERT HEBERLE, of Ueberlingen, Grand Duchy
of Baden, Empire of Germany, Watchmaker (Wirth & Co., Agents).
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, & 6, Bank Street, Manchester, both in
the County of Lancaster, and 323 High Holborn in the County of Middlesex, Civil
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 :—
Ships' logs have hitherto generally been constructed on the Woltmann principle.
They are subject to great friction and therefore register badly at a low speed.

page_text: This invention comprises a horizontal waterwheel with movable paddles which are
raised by the pressure of the water.
The drawing shows a section of an apparatus constructed in accordance with this
invention.
In this arrangement, the frame is composed of flat sides A A and a wall B.
The wheel D with its axle C is mounted in this frame. The former comprises
two metal discs D, D, connected by a metal cylinder F. The paddles or blades G
are hinged onto this cylinder F between the two discs D D.
The direction of the current of the water is indicated by the arrows.
The current of water is first introduced by a bent portion K of the outer frame
or casing A B under the paddles or blades, and raises them as soon as they have
passed beyond the end of the said bent part K. The blades, when raised, rest
against pins H, which are fastened to one of the discs aforesaid, and so tend to
turn the wheel.
The current of water is cut off from one half of the wheel by the wall B of the
casing, so that the paddles gradually fall flat while passing through the still water
enclosed by the casing or frame, and pass underneath the deflecting plate K, and are
then raised again by the current of water.
The apparatus may be fastened on any part of the ship, but must be placed
relatively to the direction of the current.
In paddle steamers, the apparatus must be placed somewhere in front of the
paddles.
If it is wished to measure the distance run when the ship is steaming astern, the
apparatus should be fixed so as to be reversible.
A tube is attached to the apparatus through which a prolongation of the axis of
the wheel can be carried to the deck or other part of the vessel where it will work a
suitable registering dial.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is,
A ships' log having a horizontal water wheel, the pivoted blades of which are
capable of being raised on one side of the apparatus by the pressure of the water,
substantially as described and shown.
Dated this 14th day of December 1889.
WM. P. THOMPSON & Co.,
Agents for the Applicant.