Improvements in Step by Step Printing Telegraphs.
Year: 1898

page_text: Date of Application, 17th May, 1896
Complete Specification Left. 15th Feb. 1899-Accepted. 17th June. 1899
Date of Application, 17 may, 1090
Complete Specification Left. 15th Feb. 1899-Accepted. 17th June. 1899
PROVISIONAL SPECIFICATION.
Improvements in Step by Step Printing Telegraphs.
I, WALTER SAMUEL STELJES, of Mountview, Mount Pleasant Road, South
Tottenham, in the County of Middlesex, Engineer, do hereby declare the nature
of this invention to be as follows:-
In step by step printing telegraphs in which the type wheel is driven by a weight
or spring and is controlled by very light reverse currents and in which the
printing and the feeding forward of the paper is made to take place each time
that the line is open that is when no current is being sent in place of employing
two separate electro magnets one for controlling the type wheel and the other
a sluggish one for controlling the printing and the feeding forward of the paper
as described in the specification of a former Patent granted to me No. 15445 of
1895 I employ one magnet for controlling both.
The ends of the cores or pole pieces of this magnet I form with two faces at
right angles to one another one for acting upon an armature controlling the
imovement of the type wheel the other on an armature controlling the printing and
feeding forward of the paper.
The magnet I form in the same way as the magnet described in the above
mentioned specification for controlling the movements of the type wheel with the
rear ends of its two cores coupled to one end of a permanent magnet the other
end of which is made to come in front of the armature which controls the move-
ment of the type wheel so that the armature is magnetized in one way and the
magnet cores or pole pieces normally magnetized in the opposite way.
The magnetic circuit of the permanent magnet is thus nearly complete through
the magnet cores and armature and thus has but little magnetic effect upon the
other armature quite insufficient to affect its movements.
The armature for controlling the printing and moving forward of the paper
is normally held away from the magnet cores either by its own weight or by a
spring.
Whilst the armature for controlling the movement of the type wheel can be
rocked on central pivots so that first one end of it can be drawn to one magnet
pole and then the other to the other pole as reverse currents are passed to the
magnet coils.
So long also as reverse currents are passing the armature for controlling the
printing is held up by the electro magnet but drops when these currents cease.
To facilitate the shifting of the type wheels to change from say letters to
figures I make the type wheels capable of sliding endwise along their spindle
to allow of one being moved out of acting position and the other brought into
it. The spindle has a slot formed crosswise through it through which passes
a slide at right angles to the spindle and the wheels are held up to this slide by
a light spring. The slide has an incline upon it which when the slide is moved
endwise in one direction from one end of its traverse to the other shifts the
wheels endwise along the spindle and compresses the spring. A link jointed

page_text: to the slide and to the spindle then passes slightly beyond a position parallel
with the spindle and the spring then tends to retain the wheels in the position
into which they have been shifted-when however the slide is pressed endwise
in the opposite direction the spring returns the wheels to their former position.
The slide is arranged to be shifted from one position to another by the de- 5
pression of a finger key.
Improvements in Step by Step Printing Telegraphs.
I, WALTER SAMUEL STELJES, of Mountview, Mount Pleasant Road, South.
Tottenham, in the County of Middlesex, 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: —
In step by step printing telegraphs in which the type wheel is driven by a weight
or spring and is controlled by very light reverse currents and in which the
printing and the feeding forward of the paper is made to take place each time
that the line is open, that is when no current is being sent, in place of employing
two separate electro magnets one for controlling the type wheel and the other
a sluggish one for controlling the printing and the feeding forward of the paper
as described in the Specification of a former l'atent granted to me No. 15445 of
1895 I employ one magnet for controlling both.
The ends of the cores or pole pieces of this magnet I form with two faces at
right angles to one another one for acting upon an armature controlling the
movement of the type wheel the other on an armature controlling the printing and
feeding forward of the paper.
The magnet I form in the same way as the magnet described in the above
mentioned specification for controlling the movements of the type wheel with the
rear ends of its two cores coupled to one end of a permanent magnet the other
end of which is made to come in front of the armature which controls the move-
ment of the type wheel so that the armature is magnetized in one way and the
magnet cores or pole pieces normally magnetized in the opposite way.
The magnetic circuit of the permanent magnet is thus nearly complete through
the magnet cores and armature and thus has but little magnetic effect upon the
other armature quite insufficient to affect its movements.
The armature for controlling the printing and moving forward of the paper
is normally held away from the magnet cores either by its own weight or by a
spring, whilst the armature for controlling the movement of the type wheel can be
rocked on central pivots so that first one end of it can be drawn to one magnet
pole and then the other to the other pole as reverse currents are passed to the
magnet coils.
So long also as reverse currents are passing the armature for controlling the
printing is held up by the electro magnet but drops when these currents cease.
To facilitate the shifting of the type wheels to change from say letters to
figures I make the type wheels capable of sliding endwise along their spindle
to allow of one being moved out of acting position and the other brought into
it. The spindle has a slot formed crosswise through it through which passes
a slide at right angles to the spindle and the wheels are held up to this slide by
a light spring. The slide has an incline upon it which when the slide is moved
endwise in one direction from one end of its traverse to the other shifts the

page_text: Com
to the slide and to the spindle then passes slightly beyond a position parallel
with the spindle and the spring then tends to retain the wheels in the position
into which they have been shifted-when however the slide is pressed endwise
in the opposite direction the spring returns the wheels to their former position.
The slide is arranged to be shifted from one position to another by the de-
pression of a finger key.
The improvements are shewn in the drawings annexed.
Figure 1 is a face view of the machine.
Figure 2 is a side elevation of the electro magnet and the two axes whose
revolution it controls-the one axis carrying the type wheels and the other con-
trolling the printing and moving forward of the paper.
Figure 3 is a partial plan view showing these parts.
Figure 4 is a side view of the type wheel axis when this axis is in the position
shown in Figure 3.
Figures 4* shew a modification of Figure 4.
Figures 5 are separate views of the rocking armature which controls the turning
of the type wheel.
The
A and B are two trains of wheels each driven by a spring or weight.
train of wheels A drives the type wheel axis C and the train of wheels B drives the
axis D which controls the printing and feeding forward of the paper. Care type
wheels. E are the core pieces of the electro magnet. E are arms extending
sidewise from these cores. G is an armature in front of the ends of the arms E¹,
and H is an armature below the ends of the cores E.
The upper ends of the cores E are attached to one end of a permanent magnet F
-the other end of the permanent magnet comes at the back of the armature G---
each end of this armature is thus normally magnetized to one polarity whilst the
electro magnet cores E are magnetized to the opposite polarity.
When alternate currents are passed in regular succession through the coils
of the electro magnet the polarity of one magnet core E is intensified and the
other reversed at each reversal of current-one end of the armature G is thus
attracted to the end of one arm E and the other end of the armature is repelled
from the other arm and the armature is thus rocked to and fro-at the
same time the armature H is attracted to the cores E and remains held up so long
as alternate currents are passing. When the currents cease to pass the armature H
drops away from the magnet cores.
G is an axis by which the armature G is carried. This armature is divided
in the middle and a piece of brass or other non-magnetic substance interposed
between the two parts in order that when one end of the armature is attracted
to one arm E of the electro magnet the polarity of the other end of the armature
may remain unaltered.
G is a tooth or pallet carried by an arm which, extends from the armature
axis G. As the armature is rocked this pallet engages first with the teeth of
one escapement wheel I which is fast on the type wheel axis C and then with the
teeth of another escapement wheel I which is alongside it-each movement
allowing the escapement wheels to make a partial turn and so the type wheel
axis C is allowed to revolve with a step by step movement so long as alternate
currents are passing through the coils of the electro magnet.
The lever H which carries the armature H also carries two pallets H2 H³
against one or other of which a blade projecting from an arm D₁ which is fast on
the axis D rests.
The blade rests against the pallet H2 so long as the armature remains attracted
to the magnet cores E but when currents cease to pass and the armature drops
the pallet H is moved away from in front of the blade and the arm D¹ makes
approximately a complete revolution the blade upon it then comes against the
pallet H³ and is arrested by this pallet and remains arrested by it until the arma-
ture H is again attracted. This movement carries the pallet H3 out of the way

page_text: of the blade on the arm D¹ and the blade comes against the pallet H2 and is
arrested by it until the armature again drops.
Whenever the axis D) is allowed to make a complete turn in the way above
described an eccentric D³ upon it lifts the lever arm J which turns on an axis
at J and then again lowers this arm. The lever arm carries a roller J'over
which passes the strip of paper X to be printed on.
When the lever arm is raised it brings the paper against whichever letter on the
underside of the type wheel is opposite to it and causes this type to make its
impression upon the paper.
When the lever again descends a pawl J acting upon a ratchet wheel fast
with the roller J2 gives a partial turn to this roller and so feeds forward the
paper-ready for the next impression.
The rocking movement of the armature G is limited by adjustable stops G
and the rocking of the lever H' which carries the armature Ĥ is limited by similar
adjustable stops H*.
The armature H is but little if at all affected by the magnetism of the permanent
magnet because the magnetic circuit of this magnet is nearly complete through
the armature G arms E¹ and magnet cores E which are all good magnetic con-
ductors.
The armature H is also never allowed to come into absolute contact with the
cores E of the electro magnets-preferably also its face is covered with paper
or like material so that the magnetic circuit of the electro magnet is never
absolutely complete through good magnetic conducting metal and therefore the
fact of the armature H being held up to the magnet cores E does not prevent
the polarity of these cores being varied when alternate currents are passed
through the magnet coils and consequently does not prevent the polarity of the
arms E which extend from the cores or pole pieces being in this way varied at
each reversal of current so that they may serve to rock the armature G.
Two type wheels C are as shewn carried side by side on the type wheel axis C,
these can be pressed endwise along the axis by a coiled spring C₁ but cannot
turn around it. K is a small metallic slide which passes through a slot formed
transversely through the axis C-on the slide is a projection K¹. The boss C
which carries the type wheels carries at its end a small roller C which by the
action of the coiled spring C is always kept bearing against the projection.
A pin K restrains the slide from being moved too far in one direction-a link K³
which is jointed to the axis C and to the slide restrains the slide from being,
shifted too far in the opposite direction.
In the construction shewn in Figure 4 the projection K' has one incline formed
upon it.
In the construction shewn in Figures 4* the projection K' is V shaped.
In both constructions the spring tends to retain the type wheels in one or other
of their two positions.
In Figure 4 when the parts are in the position shewn in that figure the link K³
has passed slightly beyond a position parallel with the axis C.
In Figures 4* the roller bears against one inclined side of the projection K¹
when one type wheel is in position for printing and against the other inclined
side when the other type wheel is in position for printing.
Whenever the rotation of the type wheel axis C is arrested at the time when one
or other end of the slide K is opposite to the projection L on the printing lever and
the printing lever is lifted in the manner above described the projection comes
against the end of the slide and moves the slide endwise so causing the type
wheels to be shifted endwise along the shaft whereby the type wheel which before
was in acting position is put out of action and the other takes its place.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is―
1. The arrangement of the electro magnet-the arms projecting sidewise from

page_text: its two pole pieces-the two armatures one acted on by the ends of the pole pieces
the other by the arms the permanent magnet normally magnetizing both pole
pieces to one polarity and the latter armature to the opposite polarity so that when
alternate currents are passing through the coils of the electro magnet the first
armature is attracted to the pole pieces whilst the other which is mounted on an
axis at its centre is rocked to and fro one of its ends being attracted
to one arm and its other end repelled from the other arm at each
alternation of the current-the rocking of this armature working an
escapement which controls the turning of the type wheel axis and the movement
of the other armature working an escapement which controls the turning of
another axis allowing it to make one complete turn and effect the printing and
feeding forward of the paper each time that it drops away from the pole pieces
when currents cease to pass through the coils of the electro magnet.
2. The arrangement of the two type wheels side by side pressed endwise in one
direction along their axis by a spring and thereby held up to a slide which passes
transversely through the axis and which can be shifted endwise by the action of
the printing lever as herein before explained and an inclined projection on the
slide by which one type wheel is brought into acting position when the slide is
moved in one direction and the other type wheel into acting position when the
slide is moved in the opposite direction the spring acting to retain the type
wheels in whichever position they may have been moved into.
3. Mechanism for changing from one type wheel to another arranged sub-
stantially as herein before described and illustrated in the drawings annexed.
Dated this 1st day of February 1899.