Improvement in or relating to Logs and Sounding Apparatus.
Year: 1888

page_text: Date of Application, 28th Dec., 1888
Complete Specification Left, 26th Sept., 1889-Accepted, 21st Dec., 1889
PROVISIONAL SPECIFICATION.
Improvement in or relating to Logs and Sounding Apparatus.
PETER JAMES MURPHY Dock Gate Man (Mersey lock & Harbour Board) 2. Gray
Street Bootle near Liverpool do hereby declare the nature of this invention to be aș
follows:-
This invention has for its object the registering of the speed of ships automatically
and is called an automatic Log Register and consists of a frame of iron wood
or composition separately or conjointly having fixed thereto as per the annexed
drawings herewith." A a reel or drum in which is wound the wire line. B its winch
bandle. Wire Log Line. D turning mark a piece of rag or leather as used in the
old system to indicate the point at which the sand glass is to be turned, such rag or
leather is retained in my invention, to set in motion the spring H and to connect
the indicator G and K. Turning Lever. As the line runs out the rag D will press
down E to about an angle of 55° forwards the smaller drum F then D will liberate
itself through or over the widened part of E.
F drum one or more turns of the line C is passed round this drum, and its length
will not be registered until the spring and Indicator are set in motion by the
action of E.
G India rubber banded wheel which when passed against the axle of F by the
action of E will register by the indicator the length of line off the reel or drum.
H seconds or time spring. K the indicator which is permanently connected with G
which is turned by the axle of F. L Spring Paul connected to E by O it is drawn
out of the notch of the frame of the Time spring and at the same time connects G
with the axle of F. O is connected with L G and E. P position of brake rope.
Qbrake drum. N Framework. The old log slip is retained.
The drawings are a third the full size. The wire line which is about 400 ft. in
length is wound around the large drum. the end is passed once or twice round the small
drum, and cast over the stern of the vessel into the water when about 15 fathoms of
stray line is run out. The turning mark comes off the large drum and presses
against the turning lever until it is pressed towards the small drum to an angle of
about 55°. The turning mark will then liberate itself through the widened part of the
turning lever which being also freed will again become vertical owing to the part
below its bearings being the heaviest. The line is joined on to the small drum by the
turning lever while running out. The pressing of the turning lever by the turning
mark disconnects the "Paul" from the Time spring and at once the time spring
commences to register the required number of seconds. The motion of the "Paul
connects the India rubber banded wheel to the axle of the small drum and the
Indicator cominences to register the number of knots the ship is travelling.
When the spring runs the required time the "Paul" falls into the required notch
and stops the spring and at the same time draws with it the India rubber banded
wheel which disconnects the indicating works from the small drum; the operator
may then put the brake on the large drum and stop the line put on the winch
handle and heave in. The dials will shew the correct speed of the ship
original condition the operator can turn back the hands of the dial to zero.
To alter to
For heaving the lead disconnect by hand the spring paul from the time spring
remove the log slips replacing it with an ordinary lead, then proceed as in heaving
the log. The number of knots shown on the dial when multiplied by the number of
feet in each knot plus the length of stray line will give the correct soundings.
1711
CD 1000

page_text: COMPLETE SPECIFICATION.
Improvement in or relating to Logs and Sounding Apparatus.
I, PETER JAMES MURPHY of 21 Gray Street Bootle Liverpool Dock Gateman do
hereby declare the nature of this invention and in what inanner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
The object of this invention is to provide an apparatus for automatically indicating
or registering the speed at which a ship or other maritime vessel is travelling and
which is also applicable as an apparatus for taking ships soundings.
My invention is best described by aid of the drawings filed with the provisional
specification, in which sheet 1 shows an elevation and sheet 2 a plan of my improved
apparatus, drawn to a scale of one-third.
In these:-
A is a reel or drum, on which is wound the line.
Ba winch handle for heaving in the line round the drum A.
C the line preferably about 400 fathoms in length, which I prefer to be of wire.
Da projection (which I shall refer to as the "turning mark") on the line C
adapted to engage with the lever E as hereinafter described. This turning-mark D
may be of any suitable construction, preferably a piece of rag or leather which is
fixed securely to the line at about 12 to 15 fathoms from the end.
E a lever (which I shall call the turning lever) secured on an axle turning in
bearings as shown and preferably placed in the middle of the apparatus between the
drums A and F. This fever is forked, or has a V shaped or other notch at its upper
end, forming a "lead" through which the line runs as will be explained, and is
weighted at its lower end so as to retain a vertical position when disengaged from
the "turning mark" D.
F small drum round which one or more turns of the line are passed to cause
the said drum to revolve as the line runs out.
G India-rubber banded or other wheel, which revolves on the outer end of the
pivotted axle when pressed against the axle of the drum F by means of the said
axle y turning on its pivot through the action of the " turning lever" and its
connecting link O.
H time spring, making one revolution in a regulated period of time (preferably
14 seconds) the frame of said spring being provided with a notch into which the
spring-pawl L falls as will be described.
Kany suitable known mechanism for indicating or registering the number of
revolutions of a shaft or the like. This is fixed on the pivotted axle g, and is
connected with the wheel G, so as to be actuated by the latter when engaged with
the axle of the drum F, and thus indicate the number of revolutions made by the
drum F, thereby registering the length of the line run out.
33
L spring-pawl connected with the link O in any suitable manner, and resting in a
notch in the frame of the "time spring H, thus preventing motion of the latter
except when the said pawl is drawn out of the notch by the link O.
N the framework, of any suitable construction.
O rod or link connecting the spring-pawl L,.and pivotted axle g, with the axle of
the "turning lever" E.
Qbrake drum round which is wound one or more turns of a rope having one
end fixed at P. By pulling the other end of this rope which hangs loosely, the
motion of the apparatus can be stopped.
The mode of action is as follows:-
To find the speed of a vessel, the time-spring His wound up, and the dials on the
indicating mechanism K adjusted to zero. The line C is then coiled on the drum A,,
and the stray end passed forward over the "turning-lever" E, so as to lie in the
fork thereof, and is carried once or twice round the small drum F. An ordinary
log-strip is now attached to the end of the line, and cast into the water.

page_text: Care should be taken that the "turning mark" D be fixed securely on the line
at from 12 to 15 fathoms, distance from the log-strip.
When the vessel has sailed from 12 to 15 fathoms, the stray line from the log-strip
to the "turning mark" will have run out, and the said "turning mark," which is made
of such a size as not to pass through the forked end or notch of the "turning lever" E,
'will thus "foul" the the said lever and press same down towards the drum F.
This action of the "turning-lever will through the connecting link O, draw the
spring-pawl L out of its notch in the frame of the time spring H liberating the
latter, and will at the same moment turn the axle g on its pivot so as to press
the wheel G against the axle of the drum F. In the meantime the turning mark D
will have slipped out of the fork of the turning lever E by reason of the latter's
inclined position, and the line will continue to run out. The "turning lever" will
now be kept from regaining its normal position through the spring pawl L being
out of its notch. As the line goes out the drum F will revolve, and its axle f
turning therewith will rotate the wheel G which will actuate the indicating
mechanism K. This indicator K by registering the number of revolutions of the
drum F, will indicate the length of line as it runs out. When the frame of the
time-spring H has made one revolution, the notch therein will again be under
the spring-pawl L, which will fall into it, and the "turning lever" E being weighted
at its lower end will regain a vertical position. The "turning lever" by regaining
its normal position will by means of the link O assist the spring-action of the pawl L
so as to ensure the entry of the paul L into the notch in the frame of the time-
spring. The time spring H will thus be stopped at the completion of one revolution,
and simultaneously therewith the wheel G, having its pivotted axle connected at one
end with the pawl L will by the one motion, be disengaged from the axle, of the
drum F, thereby stopping the indicating mechanism; the latter will have registered
the length of line run out during the interval of time between the starting and
stopping of the time-spring H. The brake rope is now pulled to stop the line
running out, and the line-is-heaved in round the drum. A. by means of the winch
handle. The distance run by the ship per hour will be in the same ratio to the
length of line registered by the indicator K, as the period of time taken by the
time-spring H in making one revolution, is to one hour. The indicating mechanism
will be constructed to show on its dials the number of knots per hour run by the
vessel and said indication of speed on the dials will remain unaltered until it is
desired to "take the log" afresh when the dial hands must be moved to zero.
To use the apparatus for "heaving the lead" the log-strip is replaced by an
ordinary lead, and the spring-pawl L disconnected from the time spring H, the latter
being allowed to run down (or a peg may be placed in a hole of the spring frame to
rest on the frame of machine). The action is now the same as in heaving the log.
The number of knots indicated on the dial when multiplied by the number of
fathoms in each knot plus the length of lead and stray line will give the correct
soundings.
I wish it to be understood that I do not bind myself to any particular form of
indicating or registering mechanism as any suitable known mechanism may be used.
In place of a time spring any equivalent mechanism, such for instance as a falling
weight might be employed; the object being to govern the indicator so that it may
be in motion only during a known period of time.
The position on the line of the "turning mark" D may be varied, the distance
between the same and the "log-strip" being adjusted to allow sufficient stray line for
the log-strip to clear the eddy water before the apparatus begins to register.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improved apparatus for indicating or registering the speed at which a ship
or other vessel is running, constructed, and with its various parts arranged in com-
bination substantially as described and shown in the accompanying drawings.

page_text: 2. In an apparatus for indicating or registering the speed at which a ship or other
vessel is running, such as described, the use of an indicating or registering mechanism,
of any suitable known construction, for the purpose substantially as set forth.
3. In an apparatus for indicating or registering the speed at which a ship or other
vessel is running, such as described, a time spring H, or its mechanical equivalent in
combination with the spring-pawl L and an indicating or registering mechanism of
any suitable known construction, substantially as and for the purpose set forth.
4. In an apparatus for indicating or registering the speed at which a ship or other
vessel is running such as described, a lever E having its upper end forked or provided
with a notch, and its lower end weighted to cause it to retain normally a vertical
position, and supported in any suitable manner so as to be depressed when engaged
by the turning mark D on the line, substantially as and for the purpose set forth.
5. In an apparatus for indicating or registering the speed at which a ship or other
vessel is running, such as described, the combination of the "turning mark" D with
the "turning lever." E substantially as described and shown.
6. In an apparatus for indicating or registering the speed at which a ship or other
vessel is running, such as described, the combination with the lever E of the
connecting rod O spring-pawl L and pivotted axle g the latter having a wheel G on
its outer end connected with any suitable indicating or registering mecharism,
substantially as and for the purpose set forth.
7. In an apparatus for indicating or registering the speed at which a ship or other
vessel is running, such as described, a drum F revolved by the line and axle fin
combination with an india-rubber banded or other wheel Ġ and an indicating or
registering mechanism of any suitable known construction substantially as described
and shown.
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لسيد
1
1000