IMPROVEMENTS IN SHIPS' Logs
Year: 1876

page_text: LETTERS PATENT to Francis George Fleury, of the City and County of
Bristol, Mechanical Engineer, for the Invention of "IMPROVEMENTS IN SHIPS'
Logs."
Sealed the 4th August 1876, and dated the 24th February 1876.
PROVISIONAL SPECIFICATION left by the said Francis George Fleury at the
Office of the Commissioners of Patents on the 24th February 1876.
FRANCIS GEORGE FLEURY, of the City & County of Bristol, Mechanical Engineer.
"IMPROVEMENTS IN SHIPS' LOGS."
This Invention relates to that class of instruments in which the velocity of the
water passing the vessel is registered by suitable recording mechanism, in knots or
miles per hour, indicated by accurately constructed mechanism, and is as follows :-
In a suitable casing of metal two apertures are made, one for the inlet and the other
for the outlet, which are connected with pipes to the ships' bottom. Inside the said
casing is placed a circular chamber having revolving vanes situated therein; on the
top of the said chamber are two or more adjustable nozzles through which the water
enters, thus impinging on the vanes and causing them to rotate, and by suitable outlets
the water escapes; beneath this chamber is placed another through which the same
spindle passes, and on which are placed other vanes; in the said lower chamber and
sliding in grooves are placed fixed vanes capable of adjustment so as to regulate the
revolutions of the upper vanes, and on the upper part of the said spindle is placed a
worm for driving suitable clockwork, in the upper portion of which is placed a
recording dial or dials as may be deemed necessary.

page_text: This Invention relates to that class of instruments in which the velocity of the water
passing the vessel is registered by suitable recording mechanism, in knots or miles
per hour, indicated by accurately constructed mechanism, and is. as follows:-In a
suitable casing of metal two appertures are made, one for the inlet water and one for
the outlet water, which are connected with pipes to the ship's bottom. In the said
casing is placed a circular chamber having revolving vanes situated therein; on the
top of the said chamber are two or more adjustable nozzles through which the
water enters, thus impinging on the vanes and causing them to rotate, and by suit-
able outlets the water escapes; beneath this chamber is placed another through
which the same spindle passes, and on which are placed other vanes; in the said lower
chamber and sliding in grooves are placed fixed vanes capable of adjustment so as
to regulate the revolutions of the upper ones; on the upper part of the said spindle
is placed a worm for driving suitable clockwork, on the upper portion of which is
placed a recording dial or dials as may be deemed necessary.
My Invention relates to that class of instruments in which the velocity of the
water passing the vessel is registered by suitable recording mechanism, in knots or
miles per hour, indicated by accurately constructed mechanism.
And in order that my said Invention may be properly understood I now proceed
more particularly to set forth the system, mode, or manner in or under which the
same is or may be used or practically carried into effect, reference being had to the
annexed Sheet of Drawings and to the letters and figures marked thereon, that
is to say,
On the Sheet of Drawings hereunto appended Figure 1 is an elevation of the
apparatus for measuring the flow of water passed the ship's side, as constructed in
accordance with my said Invention. Figure 2 is a vertical section of same taken
at right angles to Figure 1. Figure 3 is a horizontal section of the same on the
lines A, B.
As shewn by the Drawing the instrument consists of an outward casing A having
an inlet and outlet way formed thereon marked B and C respectively; within the
casing other chambers are situated marked D, E, and F. D contains the clockwork,
E the measuring chamber, and F the regulating chamber; on the upper part of
the chamber E are placed two or more adjustable nozzles N, N, through which
the water enters, making its exit through the holes H, H. K, K, are revolving
vanes fixed on the spindle L, having a tangent given on top marked M for driving
the clockwork on the lower portion of the spindle, and in the chamber F are
another set of vanes S, S, for regulating the velocity of circular motion by means
of the breaks 0, 0, which can be adjusted by the screw at the bottom P.
clockwork driven by the tangent screw M is mounted on the plate Q, and securely
fastened into its place by screws, the dial plate being divided off into knots and
decimals of a knot.
The
The action of the instrument is as follows:-The inlet opening being in com-
munication with a pipe passing through the ship's side, and having a scoop on the
outside or other appliances of a similar nature for catching up the current of the
water, the water passes in through B down the nozzles G, G, which can be adjusted
in any direction and creates a circular motion of the fluid in the chamber E, thus
causing the vanes to revolve in proportion to the velocity of the current and
making its exit through the holes H, H, and thence through the outlet C into a
pipe with a similar scoop which must be turned towards the stem of the ship.
Having now described and particularly ascertained the nature of my said
Invention, and the system, mode, or manner in which the same may be used or
practically carried into effect, I would observe in conclusion what I would consider
to be novel and original, and therefore claim as the Invention secured to me by
the herein-before mentioned Letters Patent is,―
First. The general arrangement of the instrument constituting the improved log
for measuring the flow of the water passed the ship's side, substantially as herein-
before described and shewn on the Sheet of Drawings hereunto appended.

page_text: Second. The internal measuring chambers and break chambers with adjustable
nozzles and sliding breaks as shewn at Figure 2.
In witness whereof, I, the said Francis George Fleury, have hereunto set my
hand and seal, this Fourteenth day of August, One thousand eight hundred
and seventy-six.
FRANCIS G. FLEURY. (L.S.)