Year: 1898

page_text: Date of Application, 8th July, 1898
Complete Specification Left, 8th May, 1899-Accepted, 7th Oct.,
1899
I, JOHN EVELYN LIARDET, of 16, Hyde Park Gate, in the County of London,
Engineer, do hereby declare the nature of this invention to be as follows:---
This invention is designed to automatically record every movement of the
rudder of a vessel, from starboard to port and vice versa.
According to this invention, on to the sprocket wheel on the chain spindle I
attach a toothed wheel or wheels which engage with other wheels of a train
of wheels. Above the chain spindle I fix a frame carrying two or more reels
and a drum over which a tape passes. Near the said drum, I mount a pointer
provided with a pencil; the said pointer is caused to travel horizontally: this
may be done by means of a worm or screw rotated by the aforesaid train of
wheels, so that as the steering wheel is turned, the pencil will mark on the tape
the exact action of the rudder. I provide suitable means for causing the pencil
pointer to travel in either direction for indicating starboard or port steering.
Dated this 8th day of July 1898.
BROWNE & Co.,
Agents for the Applicant, 9, Warwick Court, Gray's Inn, London, W.C.
I, JOHN EVELYN LIARDET, of 16, Hyde Park Gate, in the County of London,
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:-
This invention is designed to automatically record every movement of the
rudder of a vessel, from starboard to port and vice versa.
According to this invention, on to the sprocket wheel on the chain spindle, I
attach a toothed wheel or wheels which engage with other wheels of a train
of wheels. Above the chain spindle I fix a frame carrying two or more reels
and a drum over which a tape passes. Near the said drum, I mount a pointer,
provided with a pencil: the said pointer being caused to travel horizontally. This
may be done by means of a worm or screw rotated by the aforesaid train of
wheels, so that as the steering wheel is turned, the pencil will mark on the tape
the exact action of the rudder. I provide suitable means for causing the pencil
pointer to travel in either direction for indicating port or starboard steering.
And in order that my said invention may be more clearly understood, I will
now proceed to describe the same with reference to the drawings accompanying
077

page_text: this specification, in which Figure 1 shews a front view of the apparatus, and
Figure 2 a side view.
The same letters of reference are employed to denote the same parts in all the
views.
a shews the rudder chain trunk, b table to carry the recording gear, c arms to
support the table b, d shaft to which hand steering wheel is attached, e plummer
blocks for shaft d, f chain wheel keyed to shaft d, and carrying rudder chain g.
h are ratchet wheels, one of which is attached to the bevel wheel k and the other
to the bevel wheel k¹, i shew pawls to the ratchet wheels h. are springs to
the pawls i. k, kare bevel wheels, both of which are mounted loosely on the
spindle d and engage with the crown wheel m keyed on the spindle n. 。 is a
worm on the upper end of the spindle n, p a worm wheel engaging with the
worm o, q is a tape drum on the same spindle as the worm wheel p, r and s are
other tape bobbins, t supports carrying spindles of drum q and bobbins r and s.
u is a spur wheel on the shaft d, gearing through wheels v and w to pinion .
y is a screwed spindle which carries the pinion, pencil carrier, travelling on
screw spindle y, and kept from turning by the rod A. B is a spring pressing
upon the pencil in the pencil carrier z.
The action of the above described mechanism is as follows:-
n
When the steering wheel is turned, the bevel wheel k or the bevel wheel ¹
(according to which way the steering wheel is turned) turns the crown wheel m,
keyed on to the spindle n. The crown wheel m turns the bevel wheel k¹ (or the
bevel wheel k, as the case may be) which is loose on the shaft d. The spindle
causes the worm o to rotate, thus actuating the worm wheel p, and tape drum q.
This drum communicates motion, by intermediate gearing 1 to the bobbin r.
The tape is first wound on the bobbin s, and passes thence over the drum q to
the bobbin r, on to which it is wound.
The rotation of the shaft d is communicated through the wheels u, and w
and the pinion to the screwed spindle y, so that the pencil carrier z is moved
backwards and forwards along the said screwed spindle, according to the move-
ment of the steering wheel, thus recording on the tape the direction of steering.
According to a modification of this invention, I cause the tape to travel con-
tinuously at an uniform speed, by means of clock mechanism, the tape being
divided to denote intervals of time. In this case the recording pencil would be
kept pressed against the tape as before, and the course traced out by its deflection
from one side to the other of a central line would indicate the exact time when
the course of the vessel was changed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. The combination with steering gear of automatic recording mechanism for
the purposes set forth.
2. The combination with steering gear of automatic recording mechanism
constructed and operated substantially as and for the purposes set forth.
3. The modification hereinbefore described, for the purposes set forth.
BROWNE & Co.,
Agents for the Applicant, 9, Warwick Court, Gray's Inn, London, W.C.