Improvements in Recording Instruments for Telegraphic and other Purposes.
Year: 1895

page_text: Date of Application, 28th Dec., 1895
Complete Specification Left, 28th Sept., 1896-Accepted, 7th Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in Recording Instruments for Telegraphic and other
Purposes.
I, WILLIAM THOMSON, BARON KELVIN OF LARGS, Professor of Natural Philosophy
in the University of Glasgow, in the County of the City of Glasgow, North Britain,
do hereby declare the nature of this invention to be as follows:-
:
This invention relates primarily to improvements in that class of recording
telegraph instruments, first described in my Patent No. 2147 of 1867, in which
the marker is a capillary tube dipping at one end into a stationary reservoir of
ink, and the ink is spurted from or drawn from the opposite end on to the paper;
but has applications to recording instruments for other purposes. I cause the ink
to be drawn from the capillary tube by means of rapid vibrations maintained in
the paper in a direction perpendicular to its tangent plane at the place travelled
over by the siphon. These vibrations may be maintained mechanically by means
of a vibrating soft iron armature of an electromagnet which carries a platform or
roller, or consists of a roller over which the paper is drawn in front of the mouth
of the capillary tube. On the spindle of the roller, or on a bearing coaxal with
it, is mounted a friction clutch of the kind which, when turned alternately in opposite
directions, alternately compels the roller to move in one direction, (which for brevity
I call the forward direction) and exercises a comparatively small tangential force in
the opposite direction. Springs approximately straight, mounted on the bearings of
the roller, press on it nearly in lines through its axis so as to prevent backward
motion, and to exercise comparatively small resistance against its motion in the
forward direction. To the framework of the friction clutch is attached an arm so
placed that when one point of it is held fixed or nearly fixed by means of two
fixed pins or otherwise, the vibration of the bearings of the roller causes recipró-
cating angular motion of the friction clutch relatively to the bearings of the roller, and
so causes the roller to be turned always in the forward direction. The ribbon telegraph
paper is passed between the roller, and the springs and friction clutch which now
press upon the paper and keep it firm on the roller, and cause it and the roller
to move in the forward direction in virtue of the reciprocating motion of the
bearings of the roller.
The two fixed pins or other appliance ("fork "as I shall call it for brevity), acting
on the arm of the friction clutch, as above described, may be adjusted to different
positions so as to give more or less motion to the paper for each complete vibration of
the bearings of the roller. A vibratory motion may be given to the fork so as to cause
the paper to be moved forward in cases, as for example, ordinary Morse receiving
instruments, in which vibratory motion of the paper perpendicular to its own plane
is not needed, and in which therefore the bearings of the roller are fixed.
Dated this 27th day of December 1895.
BOTTOMLEY & LIDDLE,
154 St. Vincent Street, Glasgow, Applicant's Agents.'

page_text: Improvements in Recording Instruments for Telegraphic and other
Purposes.
I, WILLIAM THOMSON, BARON KELVIN OF LARGS, Professor of Natural Philosophy
in the University of Glasgow, in the County of the City of Glasgow, North Britain,
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 primarily to improvements in that class of recording
telegraph instruments first described in my British Patent No. 2147 of 1867, in
which the marker is a capillary tube dipping at one end into a stationary reservoir of
ink, and the ink is spurted from or drawn from the opposite end on to the paper;
but has application to recording instruments for other purposes. I cause the ink to
be drawn from the capillary tube by means of rapid vibrations maintained in the
paper in a direction perpendicular to its tangent plane at the place travelled over
by the siphon. These vibrations may be maintained mechanically by means of a
vibrating soft iron armature of an electro-magnet which carries a platform or roller,
or consists of a roller over which the paper is drawn in front of the mouth of the
capillary tube. On the spindle of the roller, or on a bearing coaxial with it, is
mounted a friction clutch of the kind which when turned alternately in opposite
directions, alternately compels the roller to move in one direction, (which for brevity
I call the forward direction) and exercises a comparatively small tangential force in
the opposite direction. Springs approximately straight, mounted on the bearings of
the roller, press on it nearly in lines through its axis so as to prevent backward.
motion and to exercise comparatively small resistance against its motion in the
forward direction. To the framework of the friction clutch is attached an arın so
placed that when one point of it is held fixed or nearly fixed by means of two
fixed pins or otherwise, the vibration of the bearings of the roller causes recipro-
cating angular motion of the friction. clutch relatively to the bearings of the roller,
and so causes the roller to be turned always in the forward direction. The ribbon
telegraph paper is passed between the roller, and the springs and friction clutch
which now.press upon the paper and keep it firm on the roller and cause it and the
roller to move in the forward direction in virtue of the reciprocating motion of the
bearings of the rollers.
The two fixed pins or other appliance (fork as I shall call it for brevity), acting on
the arm of the friction clutch, as above described, may be adjusted to different
positions so as to give more or less motion to the paper for each complete
vibration of the bearings of the roller. A vibratory motion may be given to the fork
so as to cause the paper to be moved forward in cases, as for example ordinary Morse
receiving instruments, in which vibratory motion of the paper perpendicular to
its own plane is not needed and in which therefore the bearings of the roller are
fixed.
In order that my invention may be properly understood and readily carried into
effect, I have hereunto appended three explanatory sheets of drawings in the several
figures of which corresponding parts are marked with the same letters of reference.
Figure 1 is an elevation.
Figure 2 an enlarged view partly in section.
Figure 3 a detached view of the roller.
Witam suntan

page_text: In the accompanying drawings this invention is shown applied to the siphon:
recorder. This instrument is used as a receiving instrument for submarine cables.
It consists of a powerful magnet A having a coil of fine wire. B suspended between
the poles. Attached to the coil there is a siphon one end of which dips into the ink
reservoir and the other end is brought down near to the paper strip. The paper is.
brought from the reel C past guide rollers c, c, over the armature D of a small
electro-magnet E. This armature consists of a hollow roller of soft iron pivote:1
to a framework carried by two springs F, F. The ink is caused to be drawn from.
the capillary tube by means of rapid vibrations maintained in the paper. This is
accomplished by causing the soft iron roller to vibrate rapidly by means of a make-
and brake in the circuit of the electro-magnet E. One of the contacts f of the make
and brake is carried by the springs F and the other by an insulated spring G.
When the current of the electro-magnet E is made the armature is attracted
towards the poles of the electro-magnet and the contact f, g, is broken. The
Thus the armature
armature then springs back and makes contact again at f, g
carrying the paper is caused to vibrate rapidly up and down under the mouth of the
siphon. The springs F are fixed in an inclined position so that in virtue of their
flexture the paper may be carried vertically up to meet the mouth of the siphon when
the armature D rises. The siphon is freed from the paper when the armature-
falls. Thus a series of dots close enough to form a continuous or nearly con-
tinuous ink line is tread on the paper as it is drawn along past the mouth of the
siphon.
For drawing the paper along a friction clutch 1 is mounted on the spindle of
the roller which, when turned alternately in opposite directions, alternately compels
the roller to move in one direction and exercises a comparatively small tangential
force when turned in the opposite direction. The framework H is pivoted on the-
spindle of the roller D and has pivoted to it at e the clutch I which is pressed against
the paper by the spring J. The point of contact of the clutch with the paper is.
slightly in front of the line joining the centre of the pivot e, and the centre of the
spindle of the roller. Springs K, K, approximately straight are mounted on the
bearings of the roller and press on the paper in lines nearly through the axis of
the roller so as to prevent backward motion and to exercise comparatively small
resistance against its motion in a forward direction. An arm L is attached to the
framework of the friction clutch. The other end of this arm is held fixed or nearly
so by means of two fixed pins M so placed that the vibration of the roller will
cause reciprocating angular motion of the friction clutch relatively to the bearings-
of the roller and so cause the roller to be turned always in the forward direction.
and thus draw the paper along. The two fixed pins M or other appliance acting on
the arm of the friction clutch above described may be adjusted to different positions
so as to give more or less motion to the paper for each complete vibration of the
bearings of the roller.
The above described method of causing the paper to be moved forward may be
applied in cases, as for example the ordinary Morse receiving instruments, in which.
vibratory motion of the paper is not needed. In such cases the bearings of the
roller would be fixed and a vibratory motion would be given to the two pins or-
other appliance acting on the arm of the friction clutch.
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. The apparatus for causing the paper to alternately touch the marker and leave-
it free and for carrying the paper forward, substantially as described and illustrated
on the accompanying drawings.
2. The apparatus for causing the paper to alternately touch the marker and
leave it free, substantially as described and illustrated on the accompanying.
drawings.

page_text: 3. The apparatus for carrying the paper forward, substantially as described and
illustrated on the accompanying drawings.
Dated this 26th day of September 1896.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.