Improvements in Telegraphic Receiving Instruments.
Year: 1892

page_text: Date of Application, 9th Sept., 1892
Complete Specification Left, 6th Mar., 1893-Accepted, 8th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Telegraphic Receiving Instruments.
I, JOHANNES FRYDENDAHL HOFFGAARD, of 64 Lancaster Avenue, Fennel
Street, Manchester, in the County of Lancaster, Merchant, do hereby declare
the nature of this invention, which has been communicated to me from abroad by
Hans Peter Fryd, of Fredericia, in the Kingdom of Denmark, Electrician, to be
as follows:-
'This invention relates to improvements in telegraphic receiving instruments, and
the chief feature of the improvements consists in the novel construction and arrange-
ment of the parts whereby it is possible to use ink or aniline solutions in recording
by the Morse or other similar system.
The improved instrument has the usual or any convenient arrangement of clock-
work for regulating the feed of the tape or paper strip upon which the telegraphic
messages are recorded. The electrical portion of the instrument consists of two
electro magnets the double wound coils of which are fixed in their positions; but
are furnished with movable soft iron cores capable of nice adjustment by means of
fine pitch screws. The coils are connected to terminals of three lines, respectively
single, duplex and earth, so that the instrument can be used for duplex telegraphing.
Above and near the ends of the electro magnets an anchor is suspended upon a
horizontal axle supported between two adjusting screws. The anchor is horse shoe
shaped or of other suitable form so that each arm comes opposite one of the cores
of the electro magnets. A rod or plate is secured horizontally upon and at right
angles to the horizontal axle from which the anchor is suspended and one end of
this arm moves between two insulated contact pieces by means of which the
apparatus can be used for overdrawing; that is to say when, for example, the
electric current between two corresponding stations has not sufficient strength to
reach its destination, it is possible to couple up one or more of the intermediate
stations on the line and so add to the strength of the electric current. A special
relay is generally made and used for this purpose; but in this case the instrument
itself is arranged to act as a relay or overdrawing instrument.
The instrument is furnished with two anchors one of soft iron for single currents
and the other polarized for exchange currents. One anchor only is in use at a
time, and it can be removed and the other substituted just as the apparatus is
required as an ordinary Morse machine with single current or as a receiver from
an automatic transmitter with exchange currents. By means of this change of
anchors it can also be used as a relay for overdrawing from an automatic trans-
mitter with exchange currents to give an augmented electric current to a Morse
instrument elsewhere.
When no current is passing through the coils of the electro magnets the anchor is
held at rest by means of a light spiral spring the tension of which can be regulated
by an adjusting screw.
On the other end of the arm secured as above mentioned to the horizontal axle
of the anchor is mounted adjustably an aluminium or other suitable tube one end
of which is bent upwards and enters a vessel containing ink or aniline solution and
the other end is bent downwards over the cylinder which supports the tape or
paper strip. Consequently whenever the anchor oscillates upon its axle, as it is
attracted or repelled by the current passing through the electro magnets, the arm
which carries the tube vibrates and the tube works up and down in the ink vessel
from which it takes its ink, and whenever it touches the paper strip the ink flows

page_text: through the tube and is discharged upon the paper which is thus marked with the
ordinary Morse or other alphabet.
Dated this 8th day of Sentomba 1800
H. B. BARLOW & GILLETT,
Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Telegraphic Receiving Instruments.
I, JOHANNES FRYDENDAHL HOFFGAARD, of 64 Lancaster Avenue, Fennel
Street, Manchester, in the County of Lancaster, Merchant, do hereby declare the
nature of this invention, which has been communicated to me from abroad by
Hans Peter Fryd, of Fredericia, in the Kingdom of Denmark, Electrician, 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 to improvements in telegraphic receiving instruments, and
the chief feature of the improvements consists in the novel construction and arrange-
ment of the parts whereby it is possible to use ink or aniline solutions in recording
by the Morse or other similar system.
The improved instrument has the usual or any convenient arrangement of clock-
work for regulating the feed of the tape or paper strip upon which the telegraphic
messages are recorded. The electrical portion of thic instrument consists of two
electro magnets the double wound coils of which are fixed in their positions; but are
furnished with movable soft iron cores capable of nice adjustment by means of fine
pitch screws. The coils can be connected to terminals of three lines, respectively
single, duplex and earth; so that the instrument can be used for duplex telegraphing.
Above and near the ends of the electro magnets an armature is suspended upon a
horizontal axle supported between two adjusting screws. The armature (which by
a clerical error was referred to as an "anchor throughout my Provisional
Specification) is horse shoe shaped or of any other suitable form so that each arm
comes opposite one of the cores of the electro magnets. A rod or plate is secured
horizontally upon and at right angles to the horizontal axle from which the armature
is suspended and one end of this arm moves between two insulated contact pieces by
means of which the apparatus can be used as a relay. A special relay is generally
made and used for this purpose; but in this case the instrument itself is arranged
to act as a relay.
"
And in order that this invention may be fully understood and readily carried into
effect I will describe the accompanying sheet of drawings reference being had to
the figures and letters marked thereon.
Figure 1 is a side elevation, Fig. 2 a front view and Fig. 3 a back view of a
receiving and recording instrument fitted with the present improvements, Figs. 2
and 3 being on a larger scale than Fig. 1.
Fig. 4 is a detail view of the pen or tube and ink cup.
Fig. 5 is a detail view of the ink reservoir.
In the drawings, Fig. 1 shows the clock work mechanism A by which the paper
strip or tape is fed through the instrument, and also the electrical part or relay C
which is carried by two standards d. The part C can be raised or lowered
relatively to the paper strip by means of an adjusting screw e. The paper strip b
is drawn by the feed rollers over the drum g. The electrical part C of the
instrument consists of the two fixed coils and the soft iron cores i which can be
moved backward or forward in the coils by means of the adjusting screw j. The
coils are double wound and can be connected with the line terminals 1, 2, 3,
respectively single line, duplex and earth, so that the instrument can be used either
for single or duplex telegraphy. The armature is preferably horse shoe shaped,
but it may be of any other suitable form, and it is suspended against the electro

page_text: magnets from a balance arm 7 which is mounted on a horizontal axle m the ends of
which form pivots moving in bearings n' in the standards n. The rear end of the
balance arm moves up and down as actuated by the armature k between two
contact screws o carried by pieces p which are secured by connecting screws to
the standards n, the pieces and screws being insulated by a layer of any
suitable insulating material. When not actuated by the electric current the
armature k is held normally at rest by a light spiral spring s. On the front end of
the balance arm is attached the tube or pen shown clearly in Fig. 4, one end of
which is bent upward and enters the lower end of the ink vessel or reservoir u
which is supported by a bracket and is shown detached and in two picces in Fig. 5,
and the other end of the tube t is bent down over the drum у which supports the
paper strip b.
t
Consequently whenever the armature oscillates upon its axle m, as it is
attracted or repelled by the current passing through the electro magnets, the arm
which carries the tube t vibrates, and the said tube works up and down in the ink
vessel from which it takes its ink or auiline solution, and whenever it touches
the paper strip b the ink or aniline solution flows through the tube and is dis-
charged upon the paper which is thus marked with the ordinary Morse or other
alphabet.
The instrument is furnished with two armatures k, one of soft iron for single
currents and the other polarized for exchange currents. One armature only is in
use at a time and it can be removed and the other substituted just as the apparatus
is required as an ordinary Morse machine with single current or as a receiver from
an automatic transmitter with exchange currents.
By means of this change of armatures it can also be used as a relay for over-
drawing from an automatic transmitter with exchange currents to give an
augmented clectric current to a Morse instrument clsewhere.
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. The combination with a reservoir or vessel containing ink or aniline solution,
of an oscillating tube or pen mounted so as to be actuated by the oscillations of the
armature, the tube or pen during its vibratory movements taking ink automatically
from the reservoir and transferring it at the other end to the paper strip or tape
travelling over a drum, all substantially as herein described and as illustrated by
the accompanying drawings.
2. The combination with the ink reservoir, and a tube or pen mounted on a
balance arm, of an armature suspended from said balance arm in close proximity to
the electro magnets so that when a current is passing through their coils the
armature will oscillate and thereby cause the tube or pen to vibrate substantially
as and for the purposes herein described with reference to the accompanying
drawings.
3. The combination with an armature mounted and free to oscillate upon a
balance arm substantially as herein set forth, of an arrangement of electro magnets
the coils of which are fixed, while the iron cores are movable and can be adjusted
nearer to or farther from the armature as required.
4. The combination and arrangement of parts substantially as herein set forth
whereby the apparatus can be used as a Morse instrument and relay for both
purposes simultaneously or for either separately.
Dated this 4th day of March 1893.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicant.