Improvements in and connected with Telegraphic Apparatus for Transmitting Orders or other Communications.
Year: 1889

page_text: Date of Application, 2nd Apr., 1889
Complete Specification Left, 30th Dec., 1889-Accepted, 22nd Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in and connected with Telegraphic Apparatus for
Transmitting Orders or other Communications.
I, GEORGE ALEXANDER CALVERT, of 5 Adelaide Villas, Cork, in the County of
Cork, Ireland, Engineer, do hereby declare the nature of this Invention to be as
follows that is to say :-
My said Invention relates to apparatus of the same kind or for the same purposes
as those described in my Patent Specification No. 13853 of 1887, and comprises
further improvements in such apparatus.
One of my present improvements consists in applying to the receiving instrument
of the telegraph apparatus, a device to cause a bell or other sounder to sound or
continue sounding in the event of the person receiving an order or communication,
making a mistake in the direction in which he moves a lever or other part when
obeying the order or acting in consequence of the communication. In effecting this
improvement the part moved by hand, for example the valve gear of a steam engine,
is connected to a lever which is fitted on or near the telegraph receiving instrument,
and is arranged to move in either direction from a middle neutral position accordingly
as the valve gear is set for "ahead" or for "astern" motion. The lever has jointed
to it a plate, bar, or link provided with pins or projections between which there are
arranged two spring contact pieces held by insulating fastenings and connected to
the two parts of the electric circuit wires. The two contact pieces which are provided
with platinum contact points are not in contact when not pressed by either of the pins
or projections; and there is enough space between the pins or projections to allow
the plate bar or link to move a certain distance in either direction without pressing on
either contact piece. The plate bar or link with the pins or projections on it, is, by
means of a small lever arm formed on it or in any other convenient way connected to
the telegraph receiving instrument so as to be turned to one side for an
"ahead
order and to the other side for an ፡፡
"
astern order. Then, if the valve gear is moved
correctly the lever carrying the plate bar or link will move oppositely thereto and
diminish the movement of the pins or projections from their normal positions whereas
if the valve gear is moved wrongly the lever will increase the movement of the pins
or projections and make one of them press one of the contact pieces into contact with
the other, thereby allowing the current to pass and actuate the bell or sounder. The
engineer will by the ringing or sounding be made aware that he has made a mistake.
In cases where a sound differing from that of an ordinary electric bell is desirable I
substitute what is known as an electric trumpet, combining two or more together in
cases in which the sound given by one is not sufficient. Or I may substitute a whistle
sounded by air or steam, the admission valve thereto being moved by means of an
electro magnet.
"
A further improvement in the telegraph apparatus consists in an arrangement of
the contact surfaces and points in connection with the pulley of the receiving instru-
ment. In this improved arrangement the pulley has a bearing on only one side, and
on the face of the boss at the other side an annular strip of platinum is inlaid except-
ing at one part where a piece of ebonite or other nonconductor is inserted. A platinum
contact point carried by a spring and connected to one part of the circuit wire is made
to press upon the pulley boss at a fixed point such that the platinum strip moves in
contact with it. The other part of the circuit wire is connected to a spring contact
piece with a platinum point at the axis of the pulley and at a small distance from the
boss; and this centre point is always in contact with a contact piece fixed (with insu-
lation) to the reply handle, the last mentioned contact piece having on it a platinum

page_text: contact point in a position to bear on the annular platinum contact strip on the pulley
boss. This makes a better arrangement than what is described in my earlier Specifica-
tion herein before referred to, but the action remains the same.
Dhind
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EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in and connected with Telegraphic Apparatus for
Transmitting Orders or other Communications.
I, GEORGE ALEXANDER CALVERT, of 5 Adelaide Villas, Cork, in the County of Cork,
Ireland, 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, that is to say :-
My said Invention relates to apparatus of the same kind or for the same purposes
as that described in my Patent Specification No. 13853 of 1887, and comprises
further improvements in such apparatus.
Apparatus made or provided with my present improvements is shown upon three
accompanying sheets of explanatory drawings, which are hereinafter referred to.
دو
Figures, 1, and 2, on sheet, 1, are sectional side and front elevations of a receiving
instrument, the general arrangement of which is similar to that of the instrument
shown in figures, 1, and 2, of my said earlier Specification, and I use the same
reference letters to mark the parts which remain substantially the same, whilst I use
certain reference numerals to mark the other parts. A lever, 31, on a shaft, is
connected to, say, the reversing gear of a steam engine so as to move from its middle
neutral position (in which it is shown) in one direction or the other accordingly as
the gear is moved. Thus this lever, 31, is moved to position, 31, when the gear is set
for ahead motion, and to 33, when for astern motion. The lever, 31, has jointed to it
one end of a plate, 34, which at its other end is jointed to a link, 35; and this link
has its lower end jointed to one end of a lever, 36, centered at, 37. The other end of
the lever, 36, is fitted with two pins or small antifriction rollers bearing on the outer
and inner sides of a cam-shaped rib, 38, formed or fixed on the pnlley, D. The cam
rib, 38, is shaped so as to retain the lever, 36, and the end of the plate, 34, connected
thereto, in the middle neutral position, so long as the telegraph index, B, is not
brought opposite to the "ahead"
or " astern orders on the dial, A. When the
index, B, is brought opposite to the "ahead" orders, the part of the cam rib, 38,
then acting on the lever, 36, is shaped so as to lower the end of the plate, 34,
to the position, 39, whilst the part of the cam rib acting when the index points
to "astern" orders shaped to raise the end of the plate, 34, to the position, 40.
The plate, 3+, has formed in it, and near its middle an opening into which project
adjustable pins, 41, 42, between which are arranged two spring contact pieces, 43, 44,
held by insulating fastenings and connected to the two parts, 45, 46, of the electric
circuit wires. The two contact pieces, 43, 44, which are provided with platinum
contact points are not in contact when not pressed by either of the pins, 41, 42; and
there is enough space between the pins, to allow either end of the plate, 34, to move
up or down a certain distance without the contact pieces being pressed together.
When an
"ahead" order is transmitted one end of the plate, 34, being lowered to the
position, 39, the pin, 41, is lowered, but not sufficiently to bring the contact
pieces, 43, 44, together, and if the reversing gear, which is connected to the lever, 31,
is moved correctly it will move the plate, 34, to the position 32, with its middle and
the pins, 41, 42, in the neutral position or nearly so; but if the reversing gear is
moved the other way, the end of the plate, 34, will be brought to the position, 33,
which action lowering the pin, 41, still further will make it press the upper contact
piece, 43, into contact with the lower one, 44, and the electric current will pass

page_text: and actuate the bell or sounder thereby showing the engineer that he is making a
mistake.
Figure, 3, on sheet, 2, is a vertical section as at right angles to figure, 4, which is a
front elevation as with the dial removed. These figures show a receiving instrument
with the contact surfaces and points arranged in an improved manner.
In this case
the pulley, D, has a bearing, C, on one side only, and on the face of the boss, T, at
the other side, an annular strip of platinum, U, is inlaid, excepting at one point, V,
where a piece of ebonite or other nonconductor is inserted. A platinum contact point
carried by a spring, P, and connected to one part of the circuit wire at, N, is made to
press upon the pulley boss at a fixed point, W, such that the platinum strip, U, moves
in contact with it. The other part, M, of the circuit wire is connected to a spring
contact piece, J, with a platinum point, X, at the axis of the pulley, D, and at a small
distance from the boss; and this centre point is always in contact with a contact
piece, I, fixed (with insulation) to the reply handle, G, the last mentioned contact
piece having also on it a platinum contact point in a position to bear on the annular
platinum contact strip, U, on the pulley boss.
The arrangement of links and levers by means of which attention is called to an
error in carrying out an order transmitted by the telegraph, differs somewhat from
that shown in figures, 1, and 2, and herein before described; and the current. is
allowed to pass, in the event of an error, through the same circuit wires and sounders
that are employed for calling attention to the order. The pieces, P, and J, are each
extended upwards to contact points, 43, 44, which are not in contact when not
pressed by either of the pins, 41, 42, which pins are carried by a plate, 34, pivoted
at its upper side upon the lower end of a lever, 31, arranged to move in concert with
the reversing gear of a steam engine or with other apparatus. The plate, 34, has
fixed to or formed in one piece with it an arm or lever, 36, which is arranged to be
moved by the cam rib, 38, on the pulley, D; and the actions of the parts are
precisely the same as those of the similarly marked parts in figures, 1, and 2, and
hereinbefore described.
In some cases, or if desired, the contact pieces, 43, 44, may be insulated and
connected to an independent circuit and sounder as described for the first modification.
I prefer that the sounder which gives warning when an error is being made should
differ in kind or tone from the sounder which calls attention to the transmission of an
order. The currents for actuating the warning sounders may in some cases be
produced by magneto-electric apparatus worked by the notion of the engines. The
warning would then only sound when the engines were moving in the wrong
direction; but I prefer that the warning should be given before the engines move,
and as soon as the reversing gear is being moved in the wrong direction. The
warning sounder may be in the engine room only, or there may be more than one
in the same circuit, as for example, at the sending station as well as in the engine
room.
The circuit which is closed and broken at the receiving instrument may itself
actuate one or all of the sounding devices; or it may be employed only to actuate the
magnetic switches of local relay circuits worked by separate batteries arranged to
actuate the sounders.
In cases in which a sound differing from that of an ordinary electric bell is
desirable I substitute what is known as an electric trumpet or syren, combining two
or more together when the sound given by one is not sufficient. Or I may substitute
a whistle sounded by air or steam, the admission valve thereof being moved by means
of an electro magnet.
On sheet, 3, of the drawings there is shown by way of example, a diagram of the
receiving instrument with an arrangement of batteries, wires, relay switches, and
sounders, as herein before described. Although for convenience of representation the
parts are shown in positions apart from each other, some of the parts may be placed
in the casings of the receiving and transmitting instruments or in any other con-
venient positions. The receiving instrument, A, is, in this example, constructed
with spring contacts, for sounding warnings, separate from those controlling the

page_text: sounders, calling attention to orders. The binding" screws, M, N, are connected
to the last named spring contacts, and the wire connecting these screws has in its
circuit, a battery, 50, and relays, 51, 52, 53. These relays when actuated bring
into action local batteries, 54, 55, 56, respectively. A sounder, 57, which is in
the stokehold is what is known as an electric trumpet or syren. An electric
bell, 58, is at the sending station. A whistle, 59, to be blown by steam or air
is in the engine room, its admission valve, 60, being opened by a spindle, 61,
connected to the armature, 62, of an electro magnet, 63. The binding screws, 64,
65, on the receiving instrument, A, are each connected to one of the other spring
contacts (43, 44, figures 1 to 4) and the wires joining the screws, 64, 65, have
in their circuit the battery, 66, and electric bell, 67, which rings only when an
error is being made in moving the reversing gear.
My improved apparatus can be used not only for transmitting orders from the
captain's bridge to the engine room of a steamship, but also for transmitting orders
for steering, docking, or other analogous operations.
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
1 claim is
1. In telegraphic apparatus of the kind to which my Invention relates, combining
with the other parts a device to cause a bell or other sounder to sound or continue
sounding when a lever or other part is by mistake being moved in disagreement with
a transmitted order substantially as hereinbefore described.
2. Combining parts for acting as indicated in the first claim substantially in the
manner hereinbefore described with reference to figures, 1, and 2, of the accom-
panying drawings.
3. Combining parts for acting as indicated in the first claim substantially in the
manner bereinbefore described with reference to figures, 3, and 4, of the accom-
panying drawings.
4. The improved mode of arranging and combining the parts of the receiving
instrument which have to do with the pulley and the reply lever substantially
as hereinbefore described with reference to figures, 3, and 4, of the accompanying
drawings.
5. In telegraphic apparatus of the kind to which my Invention relates employing
as a sounder an electric trumpet or a combination of two or more electric trumpets,
substantially as hereinbefore described.
Dated this Twenty-eighth day of December 1889.
EDMUND HUNT,
Applicant's Agent.