Improvements in or connected with Speed or Revolution Indicators or Tell-tales for Engines.
Year: 1895

page_text: Date of Application, 2nd Feb., 1895
Complete Specification Left. 1st Nov., 1895-Accepted, 7th Dec., 1895
Date of Application, 2nd Feb., `1895
Complete Specification Left. 1st Nov., 1895-Accepted, 7th Dec., 1895
PROVISIONAL SPECIFICATION.
Improvements in or connected with Speed or Revolution Indicators
or Tell-tales for Engines.
We, WALKERS ENGINE SPEED INDICATOR AND RECORDER COMPANY
LIMITED, of Durban, Natal, South Africa, and JOHANNES KARL ADELSBERG of
32 Cameron Street, Liverpool, in the County of Lancaster, Mechanician, do
hereby declare the nature of this invention to be as follows:-
This invention bas reference more particularly to apparatus for indicating the
direction and speed of movement of ships engines, where it is desired.to.indicate
upon the bridge or other part of the ship, the direction, the engines are running or
set to run, and the rate of speed at which they are running, or set to run. And the
present invention has for its object, to,,provide improvements in connection with
apparatus of this kind, of the type set forth in the Specification of Patent No. 6028
of 1891.
In electric telegraphic apparatus of the kind set forth in said Specification, there
is employed an indicating pointer or device adapted to indicate by a pointer when
the engines are running ahead" or "astern," and also to shew by a dial or label
through windows or apertures in the instrument the direction, which will remain
when the engine or instrument stops the direction the engines were last running,
these parts being actuated by electro magnets. In the improved instrument or
apparatus the magnets which work the pointers or indicators. operate upon
armatures connected with said indicators or pointers through increasing mechanism,
as a rack and spur pinions, by which, for a given small movement of the armatures,
a considerable movement of the indicators is effected.
"
In one arrangement under this invention there is employed two pointers, two sets
of magnets and armatures, and an indicator to shew through a window or the like
the direction in which the engines were last moving. These magnets. act upon
pendant separate armatures, suspended from above, and having on their lower ends
a rack which engages with the pinion on a shaft supporting the pointers.
These shafts supporting the pointers, also carry arms the ends of which work in a
loop carrying an upright vibrating bar on the eud of which a label or the like is
carried, one on either side, and bearing the words "Ahead" and "Astern
respectively. The ends of these two arms engage with the vibrating rod within a
lop, and thus, when the "Ahead" or the "Astern "indicator or pointer is used,
the label or the like bearing the word "Ahead" or "Astern," as the case may be,
is moved so as to be seen through the window for exhibiting it, and it will be left
there, shewing the direction at which the engines were last moving, until the other
pointer is moved, when the vibrating rod will be reversed and shew the other word
through its window; the first named one being thereby withdrawn.
Suitable electrical leads, and a switch or switches are employed, and these are
connected with the contact actuating device operated by the engine, which may be
of the form set forth in the aforesaid former Specification.
"
In connection with the apparatus duplex gongs of different tones are employed,
one of which is used in connection with the "A head" signals, and the other with.
the "Astern signals, and these are worked by separate hammers actuated by
electro magnets. These magnets are energized suitably, by being connected up
with the leads above referred to, and so that one gong will be sounded in connection

page_text: with the "Ahead" indications or signals, and the other with the "Astern" orders.
A switch also is provided on the instrument actuated from without by which the
gongs can be cut out of action when or if desired.
The action of the apparatus generally is similar to that set forth in the aforesaid
Specification No. 6028 of 1891..
..
T
.
Improvements in or connected with Speed or Revolution Indicators
or Tell-tales for Engines.
We, WALKERS ENGINE SPEED INDICATOR AND RECORDER COMPANY
LIMITED, of Durban, Natal, South Africa, and JOHANNES KARL ADELSBERG of
32 Cameron Street, Liverpool, in the County of Lancaster, Mechanician, 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 more particularly to apparatus for indicating the
direction and speed of movement of ships engines, where it is desired to indicate
upon the bridge or other part of the ship, the direction the engines are running or
set to run, and the rate of speed at which they are running, or set to run, and the
number of revolutions run. And the present invention has for its object to provide
improvements in connection with apparatus of this kind, of the type set forth in the
Specification of Patent No. 6028 of 1891.
In electric telegraphic apparatus of the kind set forth in said Specification, there
employed an indicating pointer or device adapted to indicate by a pointer when
the engines are running ahead "
or "astern," and also to shew, by a dial or label
through windows or apertures in the instrument, the direction (which will remain,
when the engine or instrument stops) the engines were last running, these parts
being actuated by electro magnets. In the improved instrument or apparatus the
magnets which work the pointers or indicators operate upon armatures connected
with said indicators or pointers through increasing mechanism, as a rack and spur
pinions, by which, for a given small movement of the armatures, a considerable
movement of the indicators is effected.
"
In one arrangement under this invention there are employed two pointers, two
sets of magnets and armatures, and an indicator to shew through a window or the
like the direction in which the engines were last moving. These magnets act upon
pendant separate armatures, suspended from above, and having on their lower
ends a rack which engages with the pinion on a shaft supporting the pointers.
These shafts supporting the pointers, also carry arms the ends of which work in
a loop carrying an upright vibrating bar on the end of which a label or the
like is carried, one on either side, and bearing the words "Ahead" and "Astern
respectively. The ends of these two arms engage with the vibrating rod within
a loop, and thus, when the "Ahead or the Astern" indicator or pointer is
used, the label or the like bearing the word "Ahead" or
65 Astern," as the case
may be, is moved so as to be seen through the window for exhibiting it, and it
will be left there, shewing the direction at which the engines were last moving,
until the other pointer is moved, when the vibrating rod will be reversed and
shew the other word through its window, the first named one being thereby
withdrawn.

page_text: Suitable electrical leads, and a switch or switches are employed, and these are
connected with the contact actuating device operated by the engine, which may be
of the form set forth in the aforesaid former Specification.
65
In connection with the apparatus duplex gongs of different tones are employed,
one of which is used in conne tion with the Ahead" signals, and the other with
the "Astern" signals, and these are worked by separate hammers actuated by
electro magnets. These magnets are energized suitably, by being connected up
with the leads above referred to, and so that one gong will be sounded in.connection
with the "Ahead" indications or signals, and the other with the Astern" orders.
A switch also is provided, on the instrument actuated from without by which the
gongs can be put out of action when or if desired.
Referring now to, the drawings which illustrate this invention,
t
Figure 1 is a front sectional elevation, Figure 2 is a front outside elevation, and
Figure 3 a back sectional elevation shewing the apparatus, while Figure 4 is a
detail of same to a larger scale..
Figures 5 and 6 are details of parts in connection with the speed indicator, for
registering the number of revolutions.
493
"
Figure 7 shews a plan of the contact making and breaking device.
In these drawings, a is the "bridge" instrument in charge of the captain or other
person. It consists of a case b on a stand c closed at the back by a plate, and at
the front by a dial plate d, over which the pointers eel work, and having windows f
in it; whilst the magnets, gongs, and parts hereafter described are supported on a
vertical diaphragm plate g in the case b. are the "Ahead" and "Astern
electro-maguets. are two armatures suspended loosely from the pin ¹, and having
cach a rack at the bottom, which engages with a pinion on a shaft j', which
shafts pass through the front dial d, and on the ends of which the pointers e e¹ are
fixed. By this tooth gearing and arrangement of parts, the armatures may
always be close to the magnets and have when acted upon only a small movement,
yet the tooth gearing gives the pointers a relatively long and easily distinguishable
stroke. The shafts are supported by triangular shaped frames k which are
carried or supported from the plate 9 by the pin i', and pins, and between these
frames the armatures with their racks and pinionsj are arranged and work. I are
the direction dials used and working in connection with the windows f, one having
the word "Ahead" on it and the other "Astern," the said dials being supported
upon an upright oscillating bar loosely mounted on the pin.12. This bar has a
loop in which pins m, mounted on the arms m', fixed upon the shafts j', work;
said pins coming within said loop, and adapted to operate as hereafter describel.
Two sets of magnets are connected with the contact device by wires nn',
'the wire n
being connected with the magnets for working their "Ahead" pointer
and dial, and the wire n' for working the "Astern" pointer and dial, while a third
wire n² is a common return to both sets of magnets, and upon it, on the column c,
an ordinary switch o is provided to break the circuit and put the instrument out of
action whenever required.
The "Ahead" maguets h for working the "Ahead" pointer e and dial, and
those for working the Astern pointer are only operated and have electricity
passed, through them, when the engines are moving ahead or astern, respectively;
and the contact making device is so arranged as to do this. The particular
instrument shewn in Figures 1 and 5 (which however forms no part of this
invention) consists as follows:-A shaft p, driven by a pulley pl by a rope from the
engine, is mounted upon supports q, and has in the centre between these supports a
disc p² fixed upon it, on,
which disc, pawls p³ and p', arranged one on either side,
and disposed in opposite directions, are provided. Upon this shaft p, slecves r are
loosely mounted, having two ratchet wheels adapted to work in connection with,
the pawis p, p, and at the opposite ends projecting parts 2 which are adapted in
each revolution to come into contact, when rotated, with a brush or spring x or a,
arranged, respectively, in connection with the wires n and n. The action of this
device is, that according to which direction the shaft p is driven or rotated, so

page_text: will one or other of the pawls p³ or p¹ engage with its ratchet wheel r¹, and rotate
one or other of the sleeves and contact projection 72, and so cause the circuit
between this instrument, and one or other of the sets of electro-magnets h or h¹ in
the instrument a to be energized and put in action, while one pawl is in operation,
it will be evident the other will ride freely over the teeth of its ratchet wheel r²,
and that ratchet wheel and its contact device ² remain inoperative.
In order to register the number of revolutions
Ahead" and "Astern," there
is provided on, each side of the dial d a train of wheels v² 34, worked by two
arms s one of which is attached to each pinion wheel of the Ahead and Astern
. indicators, (see Figures 5 and 6). The arms has at one end a pawl working ou
ST
a pivot and controlled by the spring. The arms has a downward and upward
motion given to it by the pinion j and the pawl s' works the ratchet wheel ³ which
has ten teeth, each movement of the pinion j moves the wheels one tenth of a
revolution. is a check spring which prevents the wheels moving more than one
tooth at a time, and also holds it in position, while the pawl s turning on its pivot
so as to pass the tooth of the wheels without acting on it, goes back to its former
position. On the axle of the ratchet wheel s³ there is a pinion wheel having ten
teeth which work on a wheel v' which has one hundred teeth, so that' every ten
revolutions of the ratchet wheel s³ cause the wheel to revolve ouce, and in like
manner, every. ten revolutions of the wheel v cause one revolution of the wheel v²,
and so, on throughout the train in respect to the wheels. On the axle of each
of the wheels u.uvu, there are fingers which move round divided 'dials' won
the exterior of the instrument; to record the number of revolutions.
K
In connection with the apparatus, sounding gongst of different' sizes and
tones are adapted to be eperated by electro-magnets uu through hammers u² u³,
current being taken to these magnets from the wires n or n³ to energize them; while a
contact making device y is provided on the return wire y-which is connected
with the common return wire n-to cut off the bells altogether when required. By
this arrangement, the magnets u and the big gong t will be set in action when the
Ahead indicating part of the apparatus is in action; whilst when going astern, and
the Astern indicator is in action, the magnet u' will be set in action, and the smal!
or shrill gong t¹ sounded.
In operation, when the engines are going ahead, a contact will be made each
revolution by the contact maker, and current (generated from a suitable source)
passed through the Ahead magnets h, and then cut off. While the current is
Howing, the armature i connected with the magnets h being close against the poles,
is attracted and drawn towards them, so moving the rack, and this motion is
imparted to the pinion; and shaft j', and the pointer e connected with it, and
through this gearing, the movement of the pointer his increased, and rendered
of considerable length. And in this action also, the bar carrying the dials
will be moved, simultaneously with the armature, by the magnet, as the arm m³,
carrying the pin m, which lies within the loop 13, is on the shaft j which was operated
by the magnets; and thus, through the pin m it will be moved to one side so as to
shew the word "Ahead through the Ahead window : nothing been seen at the
other window. This movement of the dials takes place in the first stroke or
action of this set of magnets, and they remain there, until the other opposite set of
magnets h¹ are energized and act, as the repeated movement of the pin m at each
revolution, so long as this ahead revolution is being made, does not act upon any
part of the arm 11, but moves freely in the loop 13. When however the reverse
revolution is in operation and the engine going astern, then the other pin m when
operated by the magnets n¹ will pull the arm over in the opposite direction; but
while the engine is at rest, the direction at which the engine was last running will
be shewn by the word appearing at the window connected with that direction of
movement of the engine.
6:
The indications therefore, afforded by this instrument are, that when the engines
are going ahead" the Ahead pointer e moves from its vertical position to the
right each revolution, its return action being effected by a spring pulling back the

page_text: "
armatures to their normal position, and the pointer to the vertical position, and
there will als be shewn at the window on the ahead side, the word "Ahead
which will remain there when the engine is stopped. When the engines are going
astern the pointer e remains stationary, and el is moved, and the word "Astern
appears at the other window f
"
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In apparatus of the type herein referred to for indicating the direction and
speed of engines on board ship, the employment in connection with the operating
magnets and pointers thereof, of armatures with toothed racks or the like thereon,
aud pinions meshing or working with them, and operating the pointers, whereby a
comparatively large movement of the pointers is produced by a small movement of
the armature: substantially as described.
2. In apparatus having the characteristics specified in the preceding claim, the
particular arrangement and construction of parts shewn in and set forth with
reference to the drawings.
Dated this 31st day of October 1895.
CHEESBROUGH & ROYSTON,
15 Water Street, Liverpool, Applicants' Patent Agents.