Improvements in or connected with Ships' and Analogous Telegraphic Apparatus
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Ships' and Analogous
Telegraphic Apparatus.
We, WILLIAM CHADBURN, of 11, Waterloo Road, Liverpool, in the County of
Lancaster, Engineer, and RESTAL RATSEY BEVIS, Junior, of 2, Boundary Road,
Birkenhead, in the County of Chester, Engineer, do hereby declare the nature of
this invention to be as follows:
=:
This invention has reference to ships' telegraphic apparatus, for use
on ships, or for analogous purposes, of the kind wherein the transmission of
orders, notifications, or the like, is effected through or by a rotary transmission
mechanism, i.e. a mechanism in which the transmission of each order, notification,
or the like, is effected through a revolution, or the greater part of a revolution, of a
wheel or crank, the transmission from the transmitting instrument, to the receiving
instrument being effected through bevel wheels and shafting revolved by this wheel
or crank, or through sprocket wheels and chain, or equivalent transmission
mechanism.
In telegraphic apparatus of the kind referred to, the transmission movements
require comparatively little power; and, consequently, only a small proportion of
the full power of the operator is required; and the object of the present invention
is to provide some special strong and efficient means by which surplus power of the
operator will be checked, and the whole transmitter will be stopped, and locked when
either end of the series of crders, or the like, is reached by the rotation of the
handle; and so that over operation or over turning of the apparatus will be positively
prevented. The means hitherto employed for effecting this purpose, has not been
effective, and has broken down in practice.
According to the present invention, the means employed of effecting the end
referred to, consists of a bolt disposed at right angles to the plane of the actuating
wheel or crank, and an arm mounted upon the wheel,-say its boss-and having a
limited movement about the axis of it, the bolt referred to being adapted to be suddenly
removed into the path of the said arm, during the last revolution of the wheel, or in
effecting the last order in each direction, so that the wheel is stopped through
the arm.
One means of moving the bolt out and in, consists of a cam or tappit on a revolving
barrel, which is driven from the wheel or shaft directly connected with the actuating
wheel, and in one case this barrel may be on or form part of the intermittently
moved mechanism operated by the wheel shaft, for moving the pointer to the
transmitter, as at present employed; in which case the cam may consist of a rib or
continuous tooth, engaging with a recess in the bolt, and having a part in it, which
moves the bolt suddenly outwards, and also inwards when it turns, and reaches a

page_text: certain point of its revolution; the portion of a complete revolution performed by
this cam being the same as that traversed by the pointer moved through this
mechanism.
The arm is mounted on the boss of the actuating wheel inside with a good fit, and
is split from this boss to the end, and has freedom of movement about the boss for
a certain distance, say a small portion of a revolution, the prevention of further
movement in either direction being effected by the end of the arm coming in contact
with a part of the wheel. By this construction and arrangement, one side of the arm
will come in contact with the bolt when in action, and the arm will be held; and by a
further movement of the wheel, the part of the wheel forming the stop of the arm,
will come upon the end of the arm, and will stop it; and the arm being split, as
described, a certain amount of spring or elasticity is afforded, so that the parts are
not too suddenly brought to rest, and jar is avoided.
Datel th th low of Manal 1900
CHEESBROUGH & ROYSTON,
Applicants' Patent Agents, 15, Water Street, Liverpool.
Improvements in or connected with Ships' and Analogous
Telegraphic Apparatus.
We, WILLIAM CHadburn, of 11, Waterloo Road, Liverpool, in the County of
Lancaster, Engineer, and RESTAL RATSEY BEVIS, Junior, of 2, Boundary Road,
Birkenhead, in the County of Chester, 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 has reference to telegraphic apparatus, for use on ships, or for
analogous purposes, of the kind wherein the transmission of orders, notifications, or
the like, is effected through or by a rotary transmission mechanism, i.e. a mechanism
in which the transmission of each order, notification, or the like, is effected through
a revolution, or the great part of a revolution, of a wheel or crank, the transmission
from the transmitting instrument to the receiving instrument being effected through
bevel wheels and shafting revolved by this wheel or crank, or through sprocket
wheels and chain, or equivalent transmission mechanism.
In telegraphic apparatus of the kind referred to, the transmission movements
require comparatively little power; and, consequently, only a small proportion of
the full power of the operator is required; and the object of the present invention
is to provide some special strong and efficient means by which surplus power of the
operator will be checked, and the whole transmitter will be stopped and locked when
either end of the series of orders, or the like, is reached by the rotation of the handle;
and so that over operation or over turning of the apparatus will be positively
prevented. The means hitherto employed for effecting this purpose, has not been
effective, and has broken down in practice.
According to the present invention, the means employed of effecting the end
referred to, consists of a bolt disposed at right angles to the plane of the actuating
wheel, or crank, and an arm mounted upon the wheel,-say its boss-and having a
limited movement about the axis of it, the bolt, referred to, being adapted to be
suddenly removed into the path of the said arm, during the last revolution of the
wheel, or in effecting the last order in each direction, so that the wheel is stopped
through the arm.

page_text: One means of moving this bolt out and in, consists of a cam or tappet on a
revolving barrel, which is driven from the wheel or shaft directly connected with
the actuating wheel, and in one case this barrel may be on or form part of the
intermittently moved mechanism operated by the wheel shaft, for moving the pointer
to the transmitter, as at present employed; in which case the cam may consist of a
rib or continuous tooth, engaging with a recess in the bolt, and having a part in it,
which moves the bolt suddenly outwards, and also inwards when it turns, and
reaches a certain point of its revolution; the portion of a complete revolution
performed by this cam being the same as that traversed by the pointer moved through
this mechanism.
The arm is mounted on the boss of the actuating wheel inside with a good fit, and
split from this boss to the end, and has freedom of movement about the boss for
a certain distance, say a small portion of a revolution, the prevention of further
movement in either direction being effected by the end of the arm coming in contact
with a part of the wheel. By this construction and arrangement, one side of the
arm will come in contact with the bolt when in action, and the arm will be held; and
by a further movement of the wheel, the part of the wheel forming the stop of the
arm, will come upon the end of the arm, and will stop it; and the arm being split,
as described, a certain amount of spring or elasticity is afforded, so that the parts
are not too suddenly brought to rest, and jar is avoided.
The invention is illustrated in the accompanying drawing, which shews, in
Figures 1 and 2, a sectional elevation, and a sectional plan, (taken at the line A A,
Figure 1) respectively, a transmitting instrument provided with our improvement;
and in Figure 3 a detail, being a side view of the inside of the wheel.
The transmitting instrument shewn is of the "Admiralty" type, that is to say,
it consists of a circular head a with a horizontal "order" dial, and a pointer c on
a vertical axis, working over this dial; while the transmission of orders,
notifications, etcetera, from the instrument is effected through a bevel wheel d, the
shaft of which passes vertically through the stand e of the instrument. And, as
stated, these orders or notifications, are transmitted by an actuated wheel or crank
disc, f, placed at the side of the machine, and operating a bevel wheel, which
meshes with d; the wheel being adapted to be rotated one complete revolution for
each order, notification, or the like, to be transmitted."
The controlling bolt by which this actuating wheel f is stopped, when the end of
the series of orders, in either direction, has been reached, is marked i. It is
supported and guided in its movement into and out of the plane in which the
wheel frevolves, by a guide h, which is fixed on the casing a, and projects both
inwardly and outwardly of this casing. The inner end of the bolt is provided
below by two teeth or studs it, the shape of which, in plan, is shewn in the shaded lines
in Figure 3; and in connection with these teeth, the annular tooth j, mounted or
formed on the periphery of the wheel, works.
Parts of this tooth lie in different planes, and it is in the form of a cam as seen
by the figures. By this formation, as it revolves, at certain points in its revolution,
where it runs in a diagonal direction from one plane to another, it acts upon the
teeth, and causes the bolt i to be quickly pushed out through the slide h, or
pulled in. When the bolt is pushed out, it enters the plane in which the wheel f
stands and revolves, and lies in the path of the spring prong or arm f, which is
mounted on the hub of the wheel f; while when it is drawn in, it is moved out of
this path.
The wheel, carrying the circular cam tooth is a notched wheel, and is operated
by a wheel l, forming part of, or adapted to revolve with, the bevel wheel g, and
having a single tooth, which engages once each revolution with the notches or
apertures in the wheel, so that the wheel will be operated by this tooth wheel (,
once each revolution of the actuating wheel f. The wheels and are similar to
5 the well known "Geneva stop mechanism, and therefore need no further
description.
دو

page_text: This intermittently moved wheel &, also operates the pointer c of the transmitter,
through the bevel wheels m m¹, and spindle n, on which the pointer c is fixed, the
boss of the wheel m being fitted and fixed in the wheel, and supported by a
spindle m², fixed onto the inside of the head a of the instrument.
The action is, that when the wheel'f, and with it the wheels g and l, are actuated,
namely, given one revolution for each order or notification transmitted, the wheel
will receive partial revolution, equal to the pitch apart of the notches in it; and if
the inclined parts of the cam j be so arranged, that they come under and within the
teeth of the bolt i, when either of the end orders of the series on the dial is reached
by the pointer c (and also, of course, the pointer of the receiver in the engine room
or other place), the bolt i will be moved out into the plane of the wheel f during the
last revolution of the actuating wheel, in either direction, and will be moved
inwards out of the plane of the actuating wheel at the first revolution, when the
pointer moves away from the end order, in either direction.
The arm f is mounted with a tight frictional fit on the inside of the boss of the
wheel; and, as shewn, it is of double or split form, so that it is in effect a
spring arm; and its outer end lies in a peripheral gap f³ in the rim of the
wheel. The result of this construction is, that when in the final rotation of
the wheel f, when either end order of the series is reached by the telegraphic
apparatus--the bolt i being shut out into the position shewn in Figure 1, the arm f¹
will come in contact with the bolt, and the wheel will be stopped; but the stopping
action will be a cushioned one, by the spring nature of the arm f, so that jar and
straining of the apparatus is avoided. Should, however, the wheel be moved at a
high velocity at the end of these terminal revolutions, or urged with very great force,
a further give or cushioning effect is afforded by the slipping of the wheel boss in
the eye of the arm f¹; but this slipping is limited by the metal at the ends of the
gap f, which will come up against the ends of 1, when a certain amount of
slip has taken place.
It will be seen, if this frictional grip of the eye of fl on the boss of ƒ be very
considerable, the velocity will be braked when it comes into play; or the resistance
coming upon the operator's arm will indicate to him that the last order has been
reached, and transmitted. These cushioning mechanisms are more likely to come
into action and service when the operator is rapidly turning the actuating wheel over
a number of orders one after the other; and by them, damage to the apparatus
from causes referred to is entirely prevented.
11
Having now particularly described and ascertained the nature of this inven
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The herein described improvement in ships', and analogous telegraphic
apparatus of the "Rotary" type, consisting of means for effecting the positive
stopping of the actuating wheel or crank when the order at either end of the series
of orders has been reached by the mechanism, comprising a stop device which is
moved, and adapted to engage with the wheel, by the mechanism of the instrument,
when the said terminal orders are reached; and to move out of engagement when
the mechanism is moved away from the said terminal orders; for the purposes
specified.
2. In a transmitting instrument of a ships', or analogons "Rotary" telegraphic
apparatus, the wheel (or crank) f, and a bolt, such as i, adapted to be moved by the
mechanism of the instrument, into the path of a part of or on the said actuating
wheel, whereby the said wheel is positively stopped when the terminal orders of the
series have been reached by the apparatus or mechanism, and moved out of said
path when the mechanism is moved away from the said terminal orders; substantially
as set forth.
3. In apparatus of the character herein described, the wheel f, bolt i working
in a guide h, and cam j, the said cam being operated from a part having a reduced
amount of movement; substantially as set forth.

page_text: 4. In apparatus as herein before described and claimed, the spring arm f' on the
wheel f, adapted to work in connection with the bolt i, as herein set forth
5. The stop mechanism of a ships' or analogous telegraphic transmitting instrument
having its parts constructed and adapted to operate particularly as shewn in and set
forth with reference to the drawings.
CHEESBROUGH & ROYSTON,
Applicants' Patent Agents, 15, Water Street, Liverpool.