IMPROVEMENTS IN SHIPS' LOGS
Year: 1860

page_text: LETTERS PATENT to Johan Fredrik Klintin, of' Stockholm, for the Inven-
tion of "IMPROVEMENTS IN SHIPS' LOGS."
Sealed the 18th December 1860, and dated the 4th August 1860.
PROVISIONAL SPECIFICATION left by. the said Johan Fredrik Klintin
at the Office of the Commissioners of Patents, with his Petition, on the
4th August 1860.
I, JOHAN FREDRIK KLINTIN, of Stockholm, do hereby declare the nature of
the Invention for "IMPROVEMENTS IN SHIPS' LOGS," to be as follows:-
This Invention has for its object improvements in ships' logs. For this
purpose I employ a tube, on the exterior of which are curved blades to cause
the tube to rotate when drawn through the water. One end of the tube is
permanently closed, and is fitted with a universal joint, by which it may be
connected to a line, and 'the other end is fitted with a water-tight cover.
Within the tube is placed the recording apparatus, which consists of a tube
containing wheelwork, which gives motion to the hands of three or more dials,
the first dial recording every ten revolutions of the tube, the second every
hundred, and so on. The tube containing the wheelwork is fitted on its
exterior with a spring, which presses against the interior of the first-mentioned
tube, so that when the first-mentioned tube rotates, the recording apparatus is
carried round with it. The train of wheels of the recording apparatus is set
in motion by the. last wheel gearing with a worm, on the axis of which there
is an arm carrying a weight; this weight when the exterior tube is rotated by.

page_text: being drawn through the water prevents the worm from being rotated with it,
and the other wheels being carried round it, are thus caused to rotate on their
own axes. Before using the apparatus the cover is removed from the end of
the exterior tube, and the recording apparatus is taken out, and the pointers
of all the dials set at zero. The apparatus is then inserted into the tube, and
the cover replaced, when the apparatus. is ready for use. After use the
number of revolutions the exterior tube has made may be ascertained by
removing the cover from its end, and taking out the recording apparatus, the
dials of which will shew the number of revolutions made:
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Johan Fredrik Klintin in the Great Seal Patent Office on
the 4th February 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHAN
FREDRIK KLINTIN, of Stockholm, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourth day of August, in the year of our Lord One
thousand eight hundred and sixty, in the twenty-fourth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me,
the said Johan Fredrik Klintin, Her special licence that I, the said Johan
Fredrik Klintin, my executors, administrators, and assigns, or such others as I,
the said Johan Fredrik Klintin, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and. vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for "Ix-
PROVEMENTS IN SHIPS' LOGS," upon the condition. (amongst others) that I, the
said Johan Fredrik Klintin, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, should par-
ticularly describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed in
the Great Seal Patent Office within six calendar months next and immediately
after the date of the said Letters Patent.
NOW KNOW YE, that I,. the said Johan Fredrik Klintin, do hereby
declare the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say:

page_text: This Invention has for its object improvements in ships' logs. For this-
purpose I employ a tube, on the exterior of which are curved blades to cause;
the tube to rotate when drawn through the water. One end of the tube is:
permanently closed, and is fitted, with a universal joint, by which it may be
connected to a line, and the other end is fitted with a water-tight cover.
Within the tube is placed the recording apparatus, which consists of a tube.
containing wheelwork, which gives motion to the hands of three.or more dials,;
the second dial indicating ten times as many revolutions as the first-dial, and
the third ten times as. many as the second, and so on. The tube,containing
the wheelwork is fitted on its exterior with a spring, which presses, against the
intérior of the first-mentioned tube, so that when the first-mentioned tube
rotates, the recording apparates is carried round with it. The train of wheels:
of the recording apparatus is set in motion by the last wheel gearing with a
worm, on the axis of which there is an arm carrying a weight; this weight,
when the exterior tube is rotated by being drawn.through the water, prevents
the worm,
from being rotated with it, and the other wheels being carried round
it are thus caused to rotate on their own.axes. Before using the apparatus
the cover is removed from the end of the exterior tube and the recording
apparatus is taken out and the pointers of all the dials set at zero. The
apparatus is then inserted into the tube and the cover replaced, when the
apparatus is ready for use. After use the number of revolutions the exterior
tube has made may be ascertained by removing the cover from its end and
taking out the recording apparatus, the dials of which will shew the number of
revolutions made.
And in order that my Invention may be most fully understood and readily
carried into effect, I will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shews a side view, and Figure 2 an end view of a log constructed
according to my Invention. a, is a tube having projecting from it four
inclined blades b, b; the front end of the tube a is permanently closed, and is
of a pointed form, as shewn. To this end a ring c is connected by a universal
joint, and by this ring the apparatus is connected to the end of a line by which
the apparatus, when in use, is drawn through the water. The other end of
the tube a is closed by a cover d which fits water-tight, so that the recording
apparatus within the tube is kept perfectly dry.
Figure 3 is a plan of the recording apparatus, shewing the dials, and
Figure 4 is an edge view of the same with a portion of the exterior case
removed to shew more clearly the wheelwork. e is the exterior case of this

page_text: apparatus; at one end of the case is a'worm'f, on the axis of which there' is
an arm carrying a weight fl; the worm gears with a worm wheel 9, on the
axis of which there is a pinion g³; which, when the worm wheel is rotated,
transmits the movement to the train of wheels" which give motion to the
pointers h; h¹, h³, which together indicate on their respective dials the number
of revolutions made. The dials may be divided in any suitable manner. In
the Drawing, the first dial his shewn to be divided into ten equal parts, each
part indicating one-tenth of a minute; the second dial; h, is divided into ten
parts, and when the 'pointer of the dial h has completed one' revolution* the
pointer of the dial h¹ will have made th of a revolution; 'the third' dial, h²;
is also divided into 'ten parts, and when the pointer of the second dial, h¹, has
made a complete revolution, the pointer of the third dial will have made th
of a revolution. At the opposite end of the case of the recording apparatus
to that at which the weight f¹ is situated, is a handlej, by which the recording
apparatus may be withdrawn from the tube a, and projecting from the side
of the case-e-is-a spring, which, when the case e is within 'the' tube a, presses
against 'the interior of the tube, so that when the tube is rotated, the case e
may be caused to rotate with it, and as before explained, the pointers will be
caused to indicate on their dials the number of revolutions made:
In witness whereof, I, the said Johan Fredrik Klintin, have hereunto
set my hand and seal, this Thirty-first day of December, in the year
of our Lord One thousand eight hundred and sixty.
JUHAN FREDRIK KLINTIN.
(L.S.)