Improvements Applied to Ships' Logs.
Year: 1889

page_text: Date of Application, 19th Sept., 1889
Complete Specification Left, 6th June, 1890-Accepted, 9th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements Applied to Ships' Logs.
I FRANK SAMUEL PETT, of 113 Snargate Street, Dover, in the County of Kent,
Master Mariner, do hereby declare the nature of this invention to be as follows :-
This invention relates to Improvements Applied to Ship's Logs arranged to register
on the bridge of the vessel by the aid of a tube or pipe projecting a suitable distance
out from the bridge at right angle or any required angle to the ship.
It consists of a box arranged to oscillate in a strong back or support, which may
be T shaped and screwed or otherwise secured to the outer end of the pipe leading
to the bridge.
Into this box passes a fore and aft shaft having fitted to the end
outside of the box, a ring to make the log line fast to, or a fitting with roller to
facilitate hauling the log line in when required to inspect the fun. The end of the
fore and aft shaft within the box is in connection by means of suitable gearing (worm
and worm wheel screw or other gearing) with a vertical shaft to which is attached
either a wire rope or spindle or other suitable connection with the register or dial
fitted to the bridge end of the pipe leading from the oscillating box to the bridge.
The circular or twisting motion communicated by the log line to the fore and aft shaft
is transmitted to the vertical shaft and thereby to the wire rope or connection within
the pipe leading to the bridge and the speed of the ship registered upon the dial at
the bridge end of said pipe the oscillation of my hox always keeping the fore and
aft shaft in line with the log line which is towing parallel to the side of the ship but
at a suitable distance off.
I may fit my bearings in any manner which I may find most suitable, may apply
friction rollers between the bearings to reduce friction, and the log and registering
dial may be of any suitable kind.
Dated this Nineteenth day of September 1889.
For the Applicant,
W. E. GEDGE,
Agent.
COMPLETE SPECIFICATION.
Improvements Applied to Ships' Logs.
I FRANK SAMUEL PETT, of 113 Snargate Street, Dover, in the County of Kent,
Master Mariner 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 relates to improvements in mechanism applied to ship logs arranged
to register on the bridge or other convenient part of the vessel whose movements are
to he recorded or indicated, the parts conveying the motions of the rotator in its
rotation in the water being conveyed on board by the aid of a tube or pipe projecting
out from the bridge or other suitable part of the vessel a suitable distance at a right
angle or at other convenient angle to the side of the ship.
It consists of a box arranged to oscillate in a strong back or support, which may
be T shaped in section and screwed or otherwise secured to the outer end of the pipe
support or channel leading to the bridge. Into this box passes a fore and aft shaft
having fitted to the end outside of the box, a ring to make the log line fast to, or a
fitting with roller to facilitate hauling the log line in when required to inspect the fan.
The end of the fore and aft shaft within the box is in connection by means of suitable
gearing (bevel-wheels worm and worm wheel, screw or other gearing) with a pro-
jecting shaft to which is attached either a wire, rope, or spindle, or other suitable

page_text: Fig. 1 is a plan view of the apparatus for conveying the motion of a rolator in
the water to a registering apparatus affixed on some convenient part of the vessel.
Figs. 2, 3, 4 and 5 shew parts thereof drawn to a larger scale in order to better
indicate the construction and operation of the paris. These parts have been shewn
broken and portions omitted in order to accomodate the drawings to the sizes of the
sheets.
Fig. 6 is a detail of an alternative shape of part & for attachment of the log line a¹,
instead of to the pullay b'.
al (Fig. 1) is the rotator in the water attached by the log line a¹ to the end of
the spindle b. This end is here shewn as a pulley attached to the spindle b. The
spindle rotates in a bearing c (Fig. 5) formed in the part e and has a toothed
wheel mounted on its end within the chamber formed by the box or case d.
This toothed wheel on its under-side rests on anti-friction wheels c³ mounted on
axes carried by the ring or sleeve which rotates round the spindle b. These
wheels also bear on the upper side of the part c.. The toothed wheel ² engages
the teeth of a corresponding wheel e mounted on the end of the spindle e which.
rotates in the bearing of the part f d d are annular collars, the collar d
sliding on the neck of the box d within the projection c, and the annular; collar d²
similarly sliding in the neck of the box d within the projection. These collars
are capable of rolation on their respective necks so as, when required, to be brought
coincident with holes formed therein and in the collars, for the introduction of oil
within the said box d, in which the parts c² e² and their anti-friction rollers rotate.
When in use the holes in the collar and in the neck of the box are brought so as not
to be coincident and so as to enclose the oil therein.
The rear surface of the wheel bears on the anti-friction wheels e³ mounted on
pins carried by the collar e rotating around the spindle e. These wheels e³ also
bear against the surface of the part /. On the other end of the spindle e is
secured the hook the shoulder of which acts with the wheel to keep the
spindle in place. is a screwed socket which is attached by means of its screw
thread to the arm projecting from the vessel. This socket forms a support
for the strong back or bent arm which is preferably of T section for the sake.
of greater rigidity.
In the bent end of the part is formed a hole ³ which forms a hearing for
the projection d³ from the box d, and this projection with the part rotating
in the socket h, forms the axis of rotation of the said box and parts attached
thereto. The arm (Figs. 1, 2 & 3) which is here shewn as a hollow cylinder or
tube, (but which may be of angle iron, trough or other suitable cross section), is
supported preferably in bearings in which it can be slidden and adjusted by suit-
able holding parts. I have shewn these holding parts as collars having pro-
jections tapped to form sockets for thumb screws which pass there through and
press against to hold the hollow bar i.
These collars are formed with sockets in two parts 3 adapted to embrace
upright stanchions or supports from the part of the vessel to which the indications
are to be conveyed. These half sockets are held together on the stanchions by bolts

page_text: and nuts,, or the half sockets may be lashed to the stanchions with ropes
and the separate sockets dispensed with. On the inner end of the hollow rod i,
(Fig. 3) is mounted a sleeve or part tube having projections, tapped to receive
thumb screws, 3, the thumb screw passing through the projection and into the
hole or opening formed in the tube i, locking the short tube thereto. The thumb
screw passes through the projection and into a notch or recess formed in the
part of a suitable in-board register which may be of the kind known as Walker's
"Cherub Log Register." and which is the subject matter of Letters Patent granted
to Thomas Ferdinand Walker, numbered 4369, dated October 30th 1878; but it may
be of any other suitable description. The rotations of the rotator a are conveyed to
the log line a and by it to the end of the spindle which causes the rotation of
the toothed wheel, whose motion again is conveyed to the corresponding toothed
wheel e, thence to the spindle e, and by it to the hook connected to the loop
(Fig. 2) formed with a shoulder and extension 13 of square section. The motion
thus imparted to the part is by the squared extension thereof, 1, fitting the corro-
spondingly squared part n³, conveyed to the tube, by it to the loop n', thence to the
cord o, and by that cord o to the rotative part of the register apparatus, and thereby
to the registering and indicating wheels and parts.
The inner end of the extension is formed as a loop into which is hooked one
end m of the spring m, the other end of the spring being engaged in the loop n of
the eye-piece n, which is formed with tubular extension and square bearing n³ for
the extension of the part 1 to slide to and fro in as the line o connected thereto
by the loop of may expand or contract by influence of moisture or otherwise. The
other end of the cord or line o is tied or connected to the loop (Fig. 3) formed on
the end of the spindle operating the register in the case ; but as this register itself
forms no part of the invention I have not thought it necessary to shew more than the
general outline of such an apparatus.
Instead of the wheel (Fig. 5) an eye such as shewn in Fig. 6. may be employed
to receive a connection from the cord a².
2
When the rotator a is not desired to be in the water the bar i may be drawn with
its outer end close into the vessel by loosening the thumb screws kk, and sliding the
bar in the collars kk, the loop of the line a' may then be unfastened and the loose end
drawn in over the pulley & drawing the rotator up to that pulley to be there retained
or to be detached from the log line as desired.
い
By means of this sliding action of the bar or tube i, the box d can at any time bo
drawn in for the purpose of oiling the spindles band e, and their bearings and anti-
Friction wheels.
Fig. 7 shews a modification of a detail, for use when it is found desirable to employ
a flywheel a, or other regulator of uniformity of speed of rotation, for the purpose of
steadying the rotation of the line a attaching the rotator a to the apparatus; the
pulley being attached to the said flywheel connector or regulator at the point where
the rotator line is usually attached.
Fig. S shews another modification in which the regulator takes the form of a bar a³
instead of a wheel a³, and the connector is looped. As the use of these regulators,
whether flywheel or other wise, is well understood in practice, I have not thought it
necessary to describe the application of the same.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. In ship's log apparatus the arrangement or combination of parts forming the
box d, and parts for conveying the rotations of the rotator and line to the registering
apparatus so that the said box and its contained parts may be capable of swinging at
the end of a bar or extension from the side of a vessel substantially as and for the
purpose herein before set forth.
2. In ship's log apparatus the combination or arrangement and use of parts forming

page_text: an oscillatory box and gearing for conveying the rotations of the rotator to the
registering apparatus in-board, with a pipe support or channel part projecting from a
ship or vessel so arranged that the said support may be drawn inboard and the rotator
hauled in substantially as set forth.
3. The combination or arrangement and use of parts of ship log apparatus sub-
stantially as set forth, wherein the motion of a rotator in the water is conveyed by
suitable transmitting and regulating apparatus carried by a hollow bar projecting
from the vessel and provided with oscillatory box or case suspended in bearings
carried by the said bar and means for supporting and regulating the position of the
said bar all substantially as and for the purpose hereinbefore set forth.
Dated the 6th day of June 1890.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.