Year: 1888

page_text: 43 ѵушшиныион
from JAMES FRANCIS M мет
United States of America, Electrician.
Iphia, Pennsylvania,
United States of America, Electrician.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex, M.I.M.E.
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 to an electrical type-writer, capable of being used either as
an independent electro-mechanical instrument, or as a receiver in conjunction with a
suitable transmitter for printing-telegraphs. In this latter instance, the instrument
described hereinafter is more particularly designed to be utilized in conjunction with
the transmitter which is the subject-matter of Letters Patent No. 7202, dated the
17th of May 1887 and which is shown diagrammatically in the accompanying
drawings in connection with the essential subject-matter hereof.
As an independent electro-mechanical type-writer, it consists, essentially, of a
mechanically arranged key-board carrying the ordinary letters, characters and
punctuation marks necessary for use in machines of this description. The depression
of any key thereof will mechanically arrest the rotation of the revolving disc,
mounted on a shaft which carries the type wheel with the type letter corresponding to
such depressed key in the proper position to be imprinted upon the paper by means
of certain auxiliary devices described hereinafter, and such depression, at the same
instant, will effect the closure of a local electrical circuit by means of which the
electro-mechanical printing and letter spacing mechanisms are operated.
When, as before stated, this instrument is used in conjunction with a transmitter
such as shown and described in the beforementioned Letters Patent, or with any other
such analogous instrument, the mechanical key-board is dispensed with and the circuit
closing key board of such transmitting instrument is substituted therefor, each key
of which is so arranged that its depression will cause an imprint upon the paper-roll
both of the local receiver and of the receiver or receivers at the extremity or
extremities of the line or lines. When desirable or necessary to detach or cut out

page_text: either the local receiving instrument or the receiver at the end of the line, or both at
the same time, certain means for accomplishing this result are provided, as will be
more fully explained hereinafter.
The construction and arrangement of the particular parts of this invention are
substantially the same when the instrument is used as a local type writer as when
electrically connected with a transmitter for printing-telegraphs, except that in the
former instance, the key board is operated mechanically with respect to the type letters,
and in the latter it is operated electro-mechanically. The spacing key, however, both
as regards the mechanical key-board and transmitter, is electro-mechanical.
This invention consists, further, in certain details of construction, arrangements and
combination of parts and electrical connections, which will be more fully described
hereinafter.
Referring to the accompanying drawings:
Fig. 1 is a side elevation of this improved electrical type-writer, partly in section.
Fig. 2 is a top plan view of the discs and key-board of the same.
Fig. 3 is an inverted plan view of the large disc in which one stop is employed for
two keys.
Fig. 4 is a similar view of the large disc in which one stop is employed for each and
every key.
Fig. 5 is a diagram showing the instrument in connection with a transmitter such
as described in the before mentioned Letters Patent.
Fig. 6 is a detail perspective view, partly in section, of the type wheel, the upper
end of its supporting shaft, and its securing nut.
Like letters and numbers of reference indicate corresponding parts in the several
views of the drawings.
Before entering into a detailed description of the construction, arrangements and
combinations of parts, I will first describe this invention as a receiver in circuit with
its respective transmitting instrument at one end of the line at the opposite end of
which is another such receiver similarly in circuit with another such transmitting
instrument, each of said transmitting instruments being of the improved construction
described in the before mentioned Letters Patent.
A and A¹ represent, respectively, the transmitting and receiving instruments, located
as shown in Fig. 5, at one extremity of a line circuit D, having the button switch 66,
and their respective parts capable of being adjusted properly in order to convey or
transmit an electrical impulse caused by the depression of any of the circuit closing
keys, from the battery C, through the instruments A and A₁, over the line D, and at
the other extremity (not shown) through instruments corresponding to A and A¹ in
an inverse order, the transmitter being, as before stated, of the same construction as
illustrated in the before stated Letters Patent.
The electrical connections between the transmitter A and the receiver A¹ are as
follows:
1, 1 indicate a series of wires connecting each retracting spring 22 of the trans-
mitting instrument with a corresponding electro-magnet 3, in the receiver, it being
understood that when this invention is used in connection with a transmitting instru-
ment such as A, each key of said transmitter has a corresponding electro-magnet and
type-letter in the receiver.
44 designate a series of short wires electrically connecting one terminal of each
helix of the electro-magnets 3 3 with the transverse rod 5, which in turn, is at each
end suitably fastened upon and insulated from the base 6 of the instrument by the
small clips or brackets a a (see fig. 1) and is electrically connected with the main
battery by means of wire 7, and button switch 8, while the main battery is connected
with the ground, as shown in Figs. 1 and 5.
The electro-magnets 3 3 as before stated, correspond in number and relative situation
to the keys of the instrument A¹, and are disposed in two transverse rows or banks
upon the base 6 of the receiving instrument A¹, the upper pole of each of said magnets
being directly under and in close proximity to a corresponding key lever 9 which, as
will appear hereinafter, acts either as an armature therefor, or merely as a mechanical

page_text: detent. Therefore, it must be understood that each magnet has a corresponding
metallic key lever which, according to circumstances, acts either in the capacity as a
part of a mechanical key-board or as an armature for its respective electro-magnet 3 3
(see fig. 1).
10 represents a casting, two of which are screwed to the base 6 as shown in figs. 1
and 5, and serve as guide supports for the key-levers 99 and as bearings for the
pivot-rod 11 on which latter are fulcrummed the series of key-levers, as indicated clearly
in fig. 2.
10 indicates a base 12 having an upright main portion 13 of sufficient height to
support the pivot-rod 11 the requisite distance above the said base. In the top edge
of this portion 13 is formed a longitudinal hole extending the entire length thereof
for receiving the pivot-rod 11, and sufficient space is provided between the pivot-rod 11
and the bottom of the recesses 15 in which they work to allow a certain play for each
key-lever at its fulcrum point.
Transversely in the top edge of the portion 13 are formed a series of these last
mentioned inclined recesses 15 15 which correspond in number to the number of key-
levers 99 which latter are each perforated at their fulcrummed points for receiving the
pivot-rod 11 the said key-levers fitting in, and being guided by, these recesses 15 15
(see fig. 2) thereby forming an approximately fan-shaped key-board for the purpose of
affording convenience in manipulation. However it will be obvious that the key-
board might be arranged in any suitable or desirable shape. The two castings 10 10
are electrically connected with each other by a wire b..
As before stated, each key-lever is placed directly over the upper pole of its corre-
sponding magnet, and, as shown in fig. 1, a sew-screw 16 is inserted in each key-
lever 9 opposite to and above the upper pole of each electro-magnet 3 for the purpose
of limiting or adjusting the play of its respective key-lever when it is used either as
an armature or as a detent.
The rear free extremities of the said key levers are each provided with an enlarged
curved portion 17 which serves as a retracting agency for said levers after they have
been released, either by the operator, or by the de-energization of the magnets 3 3.
Each portion 17 is provided with an upwardly projecting metallic escapement pin
or detent 18 which is tipped on its upper surface with insulation 19 the side of said
detent being bare, so that electrical contact may be made therewith in a manner to be
hereinafter explained.
A lip 20 projects outwardly from one side of the castings 10 and a binding post 21 is
screwed down through the said lip 20 for electrically connecting the two castings with
one pole of the local battery E.
The conducting rod 5 to which a terminal of the helix of each electro-magnet 3 is
connected, extends longitudinally between the two banks or rows of magnets and is
electrically connected, as before stated, with the main battery.
A metallic vertical shaft 22 passes contrally through the machine, as shown in fig. 1,
and is mounted in suitable bearings in the base 6 and in the frame-work of the
elevated platform which carries the travelling carriage 23.
Upon the upper extremity of this shaft 22 is mounted the rotary type wheel 24,
around the periphery of which are disposed the letters, symbols or characters which
are necessary for use in printing.
The type wheel 24 is centrally perforated, as shown in fig. 6, to receive the screw
threaded end of the vertical shaft 22, and rests upon the shoulder or collar c of the
shaft.
A feather or rib d is formed vertically on the wall of the perforation 25 and is designed
to slip and fit loosely in a corresponding groove e in the screw-threaded end of the
shaft 22, thereby rigidly keying the type-wheel upon its shaft, yet allowing it to be
easily removed and replaced, by means of the nut 26. 27 designates a horizontal
journal bracket secured to the frame work of the elevated platform, at one end, and
having the adjusting screw 29 at the other, which screw fits in a diamond point in
the upper end of shaft 22 thereby forming the upper journal bearing therefor.
On the shaft 22 is rigidly mounted a thin metallic disc 28 of larger diameter, having

page_text: its under surface studded with a series of spirally disposed stops 30 which are relatively
so arranged as to have differential radial distances from each other no two stops
occupying the same distance from the centre of the disc; (see figs. 3 and 4); thus it
will be understood that while disc 28 is revolving, should one of the stops 30 come in
contact with any fixed or adjusted obstruction or obstructions, say for example, one or
more of the detents 18 of the key-levers 9 9 the said obstruction or obstructions would
only lie in the path of that particular stop, since the said stops are spirally arranged
each at a different distance from the centre of the disc.
Each stop 30 is intended to represent one or more type-letters on the periphery of
the type-wheel 24 and each of said stops occupies a relative position on the under
surface of the disc 28 with regard to its corresponding type-letter or letters on the
type-wheel, as will be clearly explained hereinafter.
In one case as shown in fig. 3 each stop 30 represents two letters on the type-
wheel 24; that is to say, any two respective type-letters which are represented by a
single stop 30 are arranged both with certain relation to each other (and with their
corresponding stop 30) upon the periphery of the type-wheel. It may be supposed
for example that the stop marked g in fig. 3 is intended to represent two letters on the
type-wheel such as M and N.
Now in order to clearly comprehend the relative construction of these several parts,
it must be first understood that all of the several key-levers 9, 9 terminate at their free
rear extremities approximately on a line corresponding to a diameter of the disc 28 or
in other words, the ends of all the key-levers, when viewed as illustrated in fig. 1, are
approximately in the same vertical plane or their longitudinal or basis line of that
plane runs diametrically through the disc 28.
Again, it will be understood, that inasmuch as the disc 28 whose shaft is designed
to be revolved in unison with the corresponding shaft (not shown) at the other end of
the line, is rigidly keyed to the shaft 22 and that the type-wheel is also similarly keyed
to this shaft, the relative positions of the corresponding stops 30 and the type-letter
will be uniformly maintained during the revolution of the shaft; and furthermore, it
will be apparent that, when any one stop meets the detent 18 of any key-lever 9, the.
type-letter corresponding to such key-lever and stop, must be opposite to the paper 32
and the impact-lever 33. Now in order that these requirements may be fulfilled, the
relative arrangement of the key-levers, stops and letter-type is as follows:-
Take the stop marked g in fig. 3 and designate the same as corresponding to both
letters "M" and "N," then in this instance, there would of course be two key-levers
of the key-board for engaging and stopping the revolution of this one stop g, one key-
lever bearing the letter M," and the other "N," and inasmuch as the stop g is
farthest from the centre of the disc 28 the end of each key-lever marked respectively M¹
and N¹, in fig. 2, would be separated from the other a distance equal to the diameter
of the circle marked h which has a radius equal to the distance of the stop g, to the
centre i, of the disc 28. Consequently this stop g having been engaged and released
by the key-lever marked M², in fig. 2, would not come in contact with the key-lever
marked N¹, in figs. 1 and 2, until it had completed one half of its revolution; i.e., a
line such as x, x drawn diametrically across the disc 28 from the stop 9, would
intersect the circle h, at the point where this stop g would come into engagement with
the key-lever N¹.
By an inspection of Fig. 3, it will be seen that the line a, a passes centrally between
two stops on the opposite side of the disc 28, the object of which construction will
appear hereinafter.
As shown in fig. 1, the diametrical line drawn from the end of the impact-.lever 33
through the type-wheel 24, would be at right angles to the horizontal line marking
the vertical plane of the ends of the key-levers; and since each stop 30 must engage
each detent 18 of its respective key-lever, no matter on which side of the disc 28 the
engagement takes place, at a point coincident with this horizontal line; and since the
particular type-letter on the type-wheel, which corresponds to its stop 30, which is
engaged by the particular key-lever depressed, must be coincident with the end of the
impact-lever 33, at the time its respective stop is stopped, it will be seen that each

page_text: type-letter is located on the periphery of the type-wheel at a point approximately at
right angles to its respective stop, and the type-wheel was bounded by the disc 28, as
conventionally exemplified in fig. 2; and inasmuch as each stop 30 represents two
type-letters on the type-wheel 24, and as any two type-letters represented by a single
stop, are diametrically opposite to each other in relative location to accord with the
relative location of the ends of the two key-levers which correspond to these two
type-letters and one stop, it will be obvious that no other stop 30, on the opposite side
of the disc, must be coincident with the horizontal line marking the ends of the key-
levers at the time a stop is engaged by a key-lever, accordingly such provision is
made by the construction shown in fig. 3; however, in practice, it may be found desirable
to have a stop 30 for each key-lever and type letter, and to meet such requirement the
disc shown in fig. 4 has been devised.
From the foregoing description and the accompanying illustrations, it will be clear,
first, that I am able to provide a key-board carrying both upper and lower case, and a
type-wheel having the corresponding type-letters or characters disposed therearound,
and second, to thereby effect the printing of both cases, with stops equal in number
to either one half or the whole of the key-levers and type-letters.
Each of the key-levers 9 is made of metal, and is bent up at its fulcrum point, as shown
in fig. 1, the rear portion thereof being in a different horizontal plane from the front
portion for the obvious purpose of being in the same plane as the disc, yet allowing free
passage underneath for the revolving stops 30 30.
The impact-lever 33 is of a curved or hooked shape, as shown, to conform both to
the size and to the character and location of the adjacent parts of the instrument,
and is pivotally supported at its lower end by the screw 35 which is carried in the
frame or bracket 36. 37 designates a vertical plate which projects up from, and is
formed integral, with the lever 33 and carries the armature 38 of the electro-magnet 39,
which in turn is suitably supported opposite to its armature by another portion of
the frame 36.
The local battery E is, as before stated, connected with a series of key-levers by
means of the binding-post 21, castings 10 10, and rod 11, and with one of the electro-
magnets of the spacing mechanism (for advancing the travelling carriage in a step-
by-step manner) by means of the wire 40, binding post 41, and wire 42, the said
spacing magnets being connected with the magnet 39 by wires 43 and 44.
the wire connecting the magnet 39 with the brush 46 which is electrically in contact
with the revolving shaft 22.
45 is
47 indicates an adjusting screw carried in the vertical plate 48 for limiting the
movement of the impact-lever.
The spacing key of the key-board instead of only having an electro-magnet, is also
provided with a contact-point 51, which is electrically connected with the spacing
mechanism by a wire 52; and the spacing key is also electrically connected by means
of the rod 11, and casting 10, to the binding post 21, and is not provided with a bent
rear portion like the other key-levers 9 9.
54 54 designate the supporting standards of the elevated platform for the travelling
carriage, and 55 is a rectangular receptacle supported by the front guide-rest 56 of
the platform, and is provided with the lid 57 for gaining access to the conical
receptacle 58 which contains the ink which coats the roller 59; the said roller being
in slight contact with the edge of the type-wheel.
60 is a suitable frame dependent from each side-bar 61 of the travelling carriage,
and serves as a support for the paper guiding or pressure rollers 62, and the casing 65,
for the roll of paper 63, which is carried through the aperture 64 in the said casing,
up between the rolls 62 62 and around the paper-roll. 8 is an ordinary switch for
disconnecting the battery C from instrument A¹.
The operation of this invention in connection with the instruments A and A' is
as follows:-
The instruments A and A' being in the position shown in fig. 5 with the button-switch 66
properly pointed, let it be supposed that the operator at the instrument A desires to
convey a message (say for example the words "DYNAMOGRAPH MACHINE")

page_text: over the line D to a distant station, he successively depresses the keys of the
instrument A composing this stipulated message. Now in order to clearly follow the
operation, we will suppose that the first key depressed is identical with that
numbered 67 on the transmitting instrument A; consequently, the depression of said
key stops the trailing arm of said instrument A and will thereby close the circuit and
cause the current to be discharged from the battery C, simultaneously up through the
magnet 3, corresponding to this key, energizing said magnet and causing its
corresponding armature key-lever to be attracted by the upper pole of this particular
magnet 3, which action thereby elevates the rear extremity of the said key-lever until
it is in the path of the particular stop 30 which represents the letter "D" on the
type-wheel (the path of the current in the above instance being from battery C
through 8, 7, 5, 3 and 1 to key 67); then the revolving disc 28 will instantaneously
force this stop 30 against the detent 18 of this armature lever 9, thereby stopping said
disc with the letter D opposite to the impact-lever 33; now at the same instant that
the stop 30 thus engages the before mentioned electrically exposed side of the
key-lever 9, the circuit will be instantaneously closed from the local battery E, through
the binding-post 21, casting 10, key-lever 9, stop 30, shaft 22, brush 46, wire 45, to
magnet 39; this closed circuit energizes the said magnet and causing the attraction
of its armature 38 and consequently, by forcing the rubber tipped end of the impact-
lever 33 against the paper 32 causes the letter D to be printed thereon, at the same
instant as the said type-wheel is stopped by the engagement of the "D" lever-key
with its stop 30; then the same impulse discharged from battery E through the
magnet 39 energizes the spacing magnets and effects the operation of the letter-spacing
mechanism at a determinate instant after the imprint is made upon the paper 32 ; said
spacing magnets being of a higher resistance than the magnet 39.
Now, the impulse imparted by the depression of the key 67 of transmitter, having,
as just described, energized the magnet 3, it will instantaneously pass over the
wire 1, connecting this magnet 3 with the key 67, through the auxiliary parts of
key 67, the transmitter A, the line D, the transmitter not shown but corresponding
to A at the other extremity of line, the corresponding key of such distant transmitter,
the distant transmitter itself, the respective wire 1 connecting the corresponding key
of the distant transmitter with its respective magnet 3 of the distant receiver, and to
ground the current while so passing having stopped the trailing arm of the distant
transmitter thereby indicating the key corresponding to that depressed, and the
magnet 3 of the distant receiver will be simultaneously energized, thereby effecting
the imprint of the type-letter D, upon the paper, and the operation of the local
circuit, impact lever 33, and the letter spacing mechanism in the same manner as
before described with reference to the apparatus at the then-transmitting end of the
wire D.
By reference to the aforesaid patent for transmitter it will be seen that the trailing
arm of the above-mentioned "distant transmitter" is synchronously arrested by an
electro-magnetic brake; therefore it has not been deemed necessary herein to show or
describe the construction and operation of this transmitter but only to represent
the same conventionally as in fig. 5, in which however the brake magnet may
be seen in the diagrammatic representation of the instrument marked A.
The release of the key 67, by the removal of the finger of the operator, will
de-energize the magnets 3, 3 at both extremities of the line, and the armature
key-levers 99 will be retracted to their normal positions by means of their weighted
free ends.
The operation is thus repeated until the end of the word "Dynamograph" is reached
The operator now being desirous of making a space between the word (dynamograph)
completed and the next word (machine) to be printed he depresses the spacer of
instrument A thereby causing the current to pass over a similar path from battery (),
to that previously described, and causing the attraction of the armature spacing key of
the receiver A¹, until it makes contact with the point 51, thereby operating the spacing
mechanism without effecting an imprint, it being remembered that the spacing-
key-lever is not provided with a detent 18."

page_text: Thus it will be understood that the operator transmits the desired message over
the line and at the same time records the said message at both extremities by the
receiver A¹.
Should it now be desired to use the instrument A¹ locally it is only necessary to
disconnect it from its battery C by the button-switch 8. Then in this instance
the key-levers 99 are used (instead of the keys of the transmitter) for intercepting
the rotation of the disc, the impact-lever and letter-spacing mechanism being operated
in the same manner as before described.
It will also be obvious that when the instrument A' is used locally, the motor for
the shaft 22 need not be speeded relatively with any other. The synchronal motor
designed to be used is of the construction shown and described in Letters Patent
No. 11200 dated 16 Aug. 1887 but any other operative unison device may be employed.
As the type-wheel 24 is revolved it is continually coated by and in contact with the
inking rollers 59 shown in fig. 1.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondent I declare that what I claim is :-
1. An electrical type-writer, comprising a series of circuit-controlling key-levers, a
current-conducting revolving disc provided with a series of stops arrested by the
movement of any key-lever; and an electric circuit including said key-levers and
disc, operated by the movement of any key-lever.
2. An electrical type-writer, comprising a series of circuit controlling key-levers, a
revolving current-conducting disc, provided with a series of stops, and arranged to be
arrested in its rotation by a movement of any one of said key-levers; an electric
circuit including said disc and key-levers; and electro-magnetic letter-spacing
mechanism, substantially as described, also included in and controlled by said electric
circuit.
3. An electrical type-writer, comprising a series of circuit-controlling key-levers, a
revolving current-conducting disc provided with a series of stops and arranged to be
arrested in its rotation by a movement of any key-lever; an electric circuit including
said key-levers and disc; electro-magnetic printing mechanism, substantially as
described, included in and controlled by said electric circuit; and electro-magnetic
letter-spacing mechanism, substantially as described also included in said electric
circuit, and arranged to be operared thereby at a determinate instant after the printing
mechanism.
4. An electrical type-writer, comprising a series of pivotted armature-key-levers,
electro-magnets for attracting said key-levers; and a revolving disc provided with
stops arrested by the attraction of any key-lever; as specified.
5. An electrical type-writer, comprising a series of pivotted armature-key-levers;
electro-magnets for attracting said key-levers; circuit closing mechanism for directing
the current through a particular magnet; and a revolving disc provided with stops
arrested by the attraction of any key-lever; as specified.
6. An electrical type-writer, comprising a series of pivotted armature-key-levers;
electro-magnets for attracting said key-levers; and a main line circuit severally
including said electro-magnets; in combination with a transmitter provided with
circuit-closing keys for directing the current through a particular actuating electro-
magnet; and a local circuit operated by the movement of any of said key-levers; as
specified.
7. An electrical type-writer, comprising a series of pivotted armature-key-levers ;
electro-magnets for attracting said key-levers; and a revolving stop-wheel or disc
arrested by the actuation of any key-lever; in combination with a series of circuit-
closing keys for directing the current through a particular magnet; as specified.
8. An electrical type-writer, comprising a series of pivotted armature-key-levers ;
electro-magnets for attracting said key-levers; a revolving stop-disc or wheel arrested
by the attraction of any key-lever; and a local circuit operated also by any movement
of said key-levers.

page_text: 9. An electrical type-writer, comprising a series of pivotted armature-key-levers ;
electro-magnets for attracting said key-levers; a revolving stop-disc or wheel arrested
by the attraction of any key-lever; and a local circuit operated also by any movement
of said armature-key-levers; in combination with a transmitter provided with a series
of circuit-closing keys for directing the current through a particular electro-magnet ;
as specified.
10. In an electrical type-writer, a series of current conducting pivotted key-levers
each included in an electric circuit; a revolving current-conducting disc, also included
in an electric circuit and provided with a series of spirally and relatively arranged
stops; an electric circuit; and a suitable source of electricity; the whole being
arranged so that the movement of any key-lever will cause its engagement with its
corresponding stop, and will simultaneously effect the operation of an electrical
circuit by electrical contact with said stops, as specified.
11. An electrical type-writer, comprising a series of pivotted armature-key-levers
having their rear extremities terminating in the same vertical plane; electro-magnets
for actuating said key-levers; a revolving disc provided with a series of spirally and
relatively arranged stops; circuit-closing mechanism for said magnets; the circuit
and a suitable source of electricity; the whole being arranged so that the separate
energization of all the magnets will cause a separate movement of all the key-levers,
a separate engagement thereof with a single and different stop, and the separate
arrestation of the said revolving disc, as specified.
12. An electrical type-writer, comprising a series of pivotted armature-key-levers,
having their rear extremities terminating in the same vertical plane, and each provided
with an automatic retracting agency; electro-magnets for actuating said key-levers ;
a revolving disc provided with a series of spirally and relatively arranged stops;
circuit-closing mechanism for said magnets; the circuit and a suitable source of
electricity; the whole being arranged so that the separate energization of all the
magnets will cause a separate movement of all the key-levers, a separate engagement
thereof with a single and different stop, and the separate arrestation of the said
revolving disc; as specified.
13. In an electrical type-writer, the combination with a series of pivotted current-
conducting key-levers, each included in an electric circuit and carrying each a symbol
of the key-board; of a revolving current-conducting disc also included in said
electric circuit and provided with a series of spirally and relatively arranged stops,
each stop corresponding to one or more symbols of the key-board; and a type-wheel
revolving in unison with the stop-disc, and provided with a series of type-letters
circularly and relatively disposed around the periphery thereof; each type-letter
corresponding to one of the symbols of the key-board and to one or more stops on the
disc; as specified.
14. In an electrical type-writer, the combination with a series of pivotted armature-
key-levers carrying each a symbol of the key-board; electro-magnets for actuating
said key-levers; a main line circuit severally including said electro-magnets; circuit-
closing mechanism for directing the current through a particular magnet; of a
revolving disc provided with a series of spirally and relatively arranged stops, each
stop corresponding to one or more symbols of the key-board; and a type-wheel
revolving in unison with the stop-disc, and provided with a series of type-letters
circularly and relatively disposed around the periphery thereof, each type-letter
corresponding to one of the symbols of the key-board and to one or more stops on
the disc; as specified.
15. In an electrical type-writer, the combination with a series of current-conducting,
pivotted key-levers, each included in a local electric circuit; of a revolving current-
conducting disc also included in said local circuit, and arrested by the movement of
any key-lever; a local circuit; the electrical connections; an electro-magnet and
armature included in said local circuit; and a pivotted impact-lever operated by said
armature.
16. In an electrical type-writer, the combination with a series of pivotted current-
conducting key-levers, each included in a local circuit and carrying a symbol of the

page_text: key-board; of a revolving current-conducting disc, also included in said local
circuit and provided with a series of spirally and relatively arranged stops, each stop
corresponding to one or more symbols of the key-board; a type-wheel revolving in
unison with said disc and provided with a series of type-letters circularly and
relatively disposed around its periphery, each type-letter corresponding to one of the
symbols of the key-board, and to one or more of the stops on the disc; a local circuit ;
electro-mechanical devices included in said circuit; a pivotted impact-lever, provided
with a retracting agency operated by said devices; and a travelling paper-feeding
mechanism; as specified.
17. The combination with the series of current-conducting pivotted key-levers
included in a local circuit; of a revolving current-conducting disc; the local circuit ;
a magnet and its armature included in said circuit; and a pivotted impact-lever
operated by said armature and provided with a retracting agency; a type-wheel
revolving in unison with the disc, and arranged to be arrested simultaneously there-
with; a travelling paper-feeding mechanism; and an ink-roller normally in contact
with said wheel.
18. The combination with a rotating type-wheel, and an impact-lever therefor; of
an electro-magnet for actuating said lever; an electric circuit including said magnet;
and a series of circuit-controlling stop-levers and stops, for simultaneously stopping
the rotation of the type-wheel and effecting the operation of said electric circuit and
impact-lever.