Type-writer
Year: 1888

page_text: 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 has reference to improvements in Electrical Type-writers, each of
which is adapted for use both as a transmitter and receiver if connected with a similar
instrument located at a different station, and as an independent local instrument when
not connected with a line.
As a line instrument, this type-writer operates, when used as a transmitter, to print
at the home station a message which is spelled out by the manipulation of keys, and
at the same time to send over the line electrical impulses which cause the printing of
the same message at a similar instrument (then acting as a receiver) located at the
distant station. When used as a receiver, the typewriter operates to record an
incoming electrical message sent from a distant transmitter (constructed in accordance
with this invention) by printing the same in the same manner in which it is printed
at the transmitting station.
As a local instrument, this improved type-writer serves the purpose of an ordinary
mechanical type-writer, with this difference, however, that the printing is effected by
electro-magnets as when transmitting and receiving.
In other pending applications filed by me and numbered 12063, 12064 and 12066
of even date herewith I have shown and described apparatus embodying the funda-
mental features thus briefly defined, and this present invention has reference to
improvements in the construction of the more essential parts of the apparatus, whereby
the functions of the same are performed with greater ease and certainty; the
mechanical difficulties of construction inherent in the original form are obviated, and
the cost of the type-writer is reduced.

page_text: In the accompanying drawings which form a part of this specification, I have
illustrated the improvements with special regard to clearness, and have omitted there-
from or merely indicated in diagram, such parts of the apparatus as are not necessarily
parts of the present invention, and the co-operation of which with the parts fully shown
will be understood without specific illustration or description.
Fig. 1, represents a side elevation, partly in section, of this improved type-writer ;
Fig. 2, represents a front elevation of the same;
Fig. 3, is a perspective view of part of the sectional type-wheel;
Fig. 4, is a cross-section of the same; and
Figs. 5 and 6, are perspective views of portions of castings employed in the
construction of the apparatus.
The general arrangement of the apparatus will more clearly appear from Figs. 1 and 2.
Upon the base plate 1, are fixed a number of posts 2, of suitable height, and these
in turn support a platform 3, upon which the apparatus proper is mounted. It consists
in the main, of a key-board, a rotary type-wheel controlled thereby, a printing-lever
or mallet, type and line-spacing mechanisms, and electro-magnets actuating the
several parts. The key-board is arranged in two sections 4, 4, each of which consists
of a casting 5, with key-levers 6, 6, pivotted therein. Each key-lever corresponds to
a letter, numeral or punctuation mark used in writing, and is provided with a button 7,
having such letter etc., marked upon its face, as in ordinary mechanical type-writers ;
the two sections of the key-board are separated from each other by a space, the width
of which is adapted to the construction of the other parts of the apparatus which are
hereinafter described.
At the outer ends of the castings 5, are standards 8, 8, which form the frame of the
apparatus, and contain the bearings for the shafts of drums 9, 9. Each drum extends
from one standard to about the inner end of its corresponding casting 5, and in the
space between the inner ends of these drums is located the type-wheel 10, which may
be of any ordinary or improved construction, but which is preferably constructed as
hereinafter more fully described.
As will be seen in Fig. 2, the type-wheel is mounted upon a portion 11 of the main
shaft of both drums, and is secured thereon so that when the drums are rotated, the
type-wheel will move with them.
The standards 8, are of such height as to support the drums a suitable distance
above the platform, as shown; and they are also provided with V-shaped guide-
bars 12, for supporting and guiding the carriage of the type-writer, which carriage,
however, has been omitted from the drawing for the sake of clearness of illustration.
The drums 9, 9, are preferably made of metal, and they are provided with a series of
stops 13, arranged helically upon their surface, the position of each stop corresponding
to the position of one of the levers of the two sections of the key-board, and also
corresponding each to one of the types upon the type-wheel.
The castings 5, have the general shape of an I-rail; they are constructed with a
base 14, by which they are secured to the platform, a central stem 15, two lateral
branches 16, 16, and a central bearing branch 17. The central bearing branch is
divided by slots 18, into a number of lugs; and perforations 19 passing in a single
line through the lugs, serve for the reception of a pivot rod passing through all of
them, and upon this rod are pivotted the key-levers 6 which are received in the slots 18.
Each alternate key-lever is curved upwardly from its outer end; it then extends in a
straight line through and beyond one of the slots in the casting 5, and is then again
curved upwardly and terminates in an upwardly curved projection 20 which engages
with a downwardly curved arm 21 formed at the end of a corresponding stop-lever 22
pivotted in a bracket 23. Between these key-levers are others, the front arms of which
terminate with the straight portions of said levers, to which the type-buttons are
secured; thus, while there is only a single row of key-levers in each section of the
key-board there are two parallel rows of type-buttons as is clearly shown in the
drawing.
From the construction thus far described it follows that if a key-lever is depressed
by hand, one of the lateral branches 16 of casting 5, will form its front stop, and if

page_text: the lever is rocked in the opposite direction, the other lateral branch 16 of casting 5,
will form its back stop. Each lever is held normally in contact with its back stop by
a counter-weight or swelling 20', formed under the projection 20. Thus, if any one of
the key-levers is first depressed in front and is then released, the weight 20' will return
such lever automatically to its normal position in contact with its back stop.
There are two castings 23 each corresponding to one of the castings 5, 5 and
parallel with the latter; each casting 23 is fastened by screws passing through a flange 24
formed at its lower edge to the platform, and it terminates on top in a projecting
flange 25 which is parallel to flange 24. Between these two flanges there is a rib 26
parallel with the two flanges, and projecting from the main body of the casting. In
general outline this rib 26 has the shape of an upwardly curved hook, and is divided
into lugs 27 which correspond each to one of the lugs on the central bearing branch 17
of casting 5. These lugs however are joined at their upper edges by a web 27' which
is cast in one piece with the lugs, as is clearly shown in Fig. 6.
The stop-levers 22 are pivotted upon a rod passing through all the lugs of rib 26
and the parts are so proportioned and arranged that in its normal position, the vertical
arm of each lever 22 leans forward, and is arrested by web 271 of casting 23. When
one of the key-levers is depressed in front its projection 20 by engaging the arm 21
of its corresponding stop-lever, will tip the vertically extending arm of lever 22,
rearwardly, until the same is arrested by the projecting flange 25 and when the key
lever is released its projection 20 by disengaging the arm 21 of its stop-lever, will
allow the latter to move into its original position under the influence of the weight of
the arm 21 which for this purpose is made comparatively thick and heavy.
The normal position of the lever 22 (shown in solid lines in Fig. 1) is insured by so
distributing the weight of said lever, that its centre of gravity is at all times to the
left hand side of its fulcrum (as shown in Fig. 1) and this may be effected either by
making the arm 21 sufficiently heavy, as before stated, or in any other suitable
manner.
The web 27¹ in each casting 23 constitutes the front stop for each of the levers 22
mounted in that casting and the flange 25 constitutes the corresponding back-stop;
and it will now be seen that when a key-lever 6 is upon its front stop the corresponding
stop-lever will be upon its back stop, while when a key-lever is upon its back stop, its
corresponding stop-lever will be upon its front stop. The latter is the normal position,
and in this position the vertically extending arms of the stop-levers are all in one
plane, which slightly inclines from the vertical, and their upper ends are all in one
straight line. The back stop 25 of the levers is so located and the levers themselves
are of such length, that when a key-lever is depressed, and its corresponding stop-lever
is forced against its back stop, the upper edge of such stop-lever will be fairly out of
contact with, but close to the surface of one of the drums or cylinders 9, 9.
The metallic stops 13 upon each cylinder, are arranged upon a helical line, and are
so spaced longitudinally that whenever a key-lever is depressed, the corresponding
stop-lever will intercept one of these stops, and will stop the cylinders and the type-
wheel rotating with the same. There are, therefore, as many stops upon each cylinder
as there are key-levers to the corresponding section of the key-board; and the number
of types upon the type-wheel is equal to the total number of key-levers. In addition
to this, there is a spacing lever which occupies the place of a key-lever; this spacing
lever is constructed exactly like a key-lever, and has its corresponding stop-lever,
pivotted in one of the castings 23. There is, however, no type upon the type-wheel
corresponding to the spacing-key, but a space 10¹ the function of which will be
explained hereinafter.
A printing lever or mailet 26¹ with its striking head 27 of soft rubber or other
elastic material, facing the periphery of the type-wheel, is pivotted to the frame 29;
one arm 28 of this lever carries the armature 30 of an electro-magnet 31 so that when
the latter is energized, the armature will be attracted and the head of the mallet
will strike upon the rim of the type-wheel, and if paper is interposed between the
type-wheel and the head of the printing lever, the letter, numeral or other character
formed upon that part of the type-wheel which happens to face the printing lever

page_text: will be printed upon such paper. The types on the type-wheel are so spaced and are
in such sequence that if a key or key-lever marked with a certain letter or character
is depressed, and the rotating cylinders 9 are stopped by the interception of one of
the stops 13 by the stop-lever corresponding to the depressed key, the same letter or
character upon the type-wheel will face the head of the printing lever. This same
letter or character will, therefore, be printed upon the paper, if the magnet 31 be
energized at the proper time; and if a word or sentence be spelled out by the
successive depression of the proper keys, this word or sentence will be printed upon
the paper, as in ordinary mechanical type-writers.
The arm 26 of the printing lever is curved, as shown to bring its centre of
gravity to one side of the fulcrum 32 and an adjustable stop-screw 33 in a standard 34
limits the outward movement of the printing lever and armature; it constitutes the
back stop of the printing-lever.
The carriage and its letter- and line-spacing mechanism is not shown in the drawing
for the sake of clearness of illustration; but the electro-magnets 35, 36 and their
adjuncts, which actuate that mechanism are shown conventionally supported upon a
standard 37. It is not necessary here to describe these magnets, and their adjuncts,
any further than to say that they are designed to move the carriage after each
imprint, and to shift the paper after the completion of a line into a position to
receive another line of writing.
To one end of the common shaft of the cylinders 9, 9 is secured a bevel gear 38
meshing with another bevel gear 39, keyed to a vertical shaft 40, which is driven
by a suitable motor (not shown) in unison with a similar shaft in an apparatus,
constructed substantially like the one here described, located at a distant station.
The synchronal motor is not here shown, but it will be understood that any ordinary
or improved motor of that kind may be used although it is preferable to use
the synchronal motor secured to me by Letters Patent No. 11200 dated
16th August 1887.
Upon a shaft 40 is secured a disc 41 of soft iron, below the platform 3, and this
disc rotating with the shaft 40, extends between the two poles of the electro-magnet 42.
When this electro-magnet is energized by the passage of a current through its coils,
one side of the disc 41 is in a dense magnetic field, and its motion will be ordinarily
retarded by the resistance of said field; and if the electro-magnet is powerful enough
the passage of the disc through the magnetic field of the same will be arrested. In
pursuance of the objects of this invention the electro-magnet 42 is made strong
enough to arrest the motion of disc 41 through its field of force whenever a
suitable current is passed through the magnetizing coil, and the construction herein
described is specially adapted to aid this operation.
In other pending applications herein before mentioned are shown electrical type-
writers serving the same purpose as that herein shown, and among other features
similar to those found in the present invention, there is also a rotary shaft with a
magnetic disc moving through a magnetic field; but in those other pending
applications there is in addition a disc of comparatively large diameter secured to
the shaft and provided with stops corresponding to the stops 13 upon the cylinders 9
shown in this case, and the momentum of a disc of such size as is necessary to
provide room for the stops would carry the same and the magnetic disc beyond the
point where it is necessary to stop it, unless the magnet were very powerful and the
energizing current very strong.
In the construction herein shown, a cylinder or cylinders are employed in place
of a disc, and this enables me to reduce the mass set in motion by the shaft to which
the magnetic disc is secured and to bring that mass closer to the mathematical axis
of rotation. For both reasons, the momentum is greatly reduced, and the electro-
magnet may be comparatively weak, and will promptly arrest the motion of disc 41
and the parts connected therewith. The reduction of the momentum of the rotating
parts has also another beneficial effect in that the shock received by the stop levers
is thereby lessened.
In addition to this the use of cylinders in place of a disc enables me to place the

page_text: stop-levers in such position that the direction of the blow of the stops upon the same
will pass through the fulcrums of these levers; the latter may, therefore, be made
comparatively light without danger of bending, whereas, in the construction with a
disc, the stop-levers are of necessity arranged to receive the blow of the stops in
such manner as tends to bend these levers.
An inking apparatus 43 is mounted upon a post or pillar 44 close to the type-wheel,
and with the inking roller 45 in light contact with the types; any suitable form of
inking apparatus may be used.
The electrical connections are as follows:-
One pole of a battery 46 is grounded by a conductor 47, and a branch 48 from the
ground conductor is connected with the contact button 49 of switch 50 the pivot of
which is connected by a wire 51 to a binding post 52 fixed upon platform 3. From
the binding post a wire 53 connects with contact button 54 of switch 55 which in
turn is connected with the line wire, as shown; a second contact button 56 of the
switch 55 connects, by means of a wire 57 with an electric signal bell 58 which is
grounded by a conductor 59.
Another wire 60 connects binding post 52 with one terminal of the coil of
magnet 42 the other terminal of which is connected by a wire 61 with the spacing
magnets 35 and 36; from the said magnets 35 and 36 the circuit proceeds by wire 62
to wire 63 to and through the coil of electro-magnet 31 which coil terminates by a
wire 64, at a binding-post 65. upon bracket 29. From binding-post 65, one wire 66,
connects with a contact brush 67, bearing upon a contact sleeve 69, on the common
shaft of the cylinders 9, 9.
When a stop-lever comes in contact with one of the stops upon the cylinders 9 the
circuit is continued through such stop-lever, casting 23 and wire 70. Upon
casting 23 is mounted a switch lever 71 which is designed to make and break contact
with a button 72 upon the platform, and said button is connected by a wire 73 with
the binding-post 65 upon bracket 29. The line is in circuit with battery 46, through
connections before described, while the bell 58 is in circuit with the battery at the
distant station through the line, and for that reason is shown grounded by wire 59
(see fig. 1).
The operation of this apparatus will now be readily understood; it is only to be
remembered that when two or more type-writers at different stations are in circuit,
the shafts 40 of the same are rotated in unison by synchronal motors located at those
stations; so that in all of them the same types upon the type-wheels pass in front of
the heads of the printing-levers at the same instant. The operation of synchronal.
motors is well understood by those skilled in the art, and need not be here
described.
If the apparatus is to be used as a transmitter, switches 50 and 71 are thrown open
and switch arm 55 is turned upon button 54. The message which it is desired to
transmit is spelled out by the successive depression and release of the keys marked
with the letters or characters composing the desired sentences. Suppose the "A" key
be depressed; the rear end of that lever being elevated, its projection 20 thereby
engaging the arm 21 of the respective stop-lever 22, the latter will be tipped over
until arrested by its back stop 25. In this position the upper end of the stop lever
will be just out of contact with the surface of the cylinder 9 in conjunction with.
which it operates and the key is held depressed until, by the rotation of the cylinders
the stop 13 which corresponds to this particular key, and stop-lever is intercepted by
the latter, whereby the type-wheel is stopped with the type "A" facing the head
of the printing lever. By the contact of stop 13 with the stop-lever a circuit is
closed as follows :-
:-
From one pole of battery 46 by wire 70, to casting 23, stop-lever 22, cylinder 9,
collar 69, upon the common shaft of the cylinders and type-wheel, brush 67, wires 66,
and 64, to and through coil of electro-magnet, 31, and by wires 63 and 62, to the
spacing-magnets 35 and 36; from the coils of the spacing-magnets the circuit
continues by wire 61, to brake magnet 42, and then by wire 60, to binding-post 52,
At the distant
and by wire 53, contact button 54, and switch arm 55, to line.

page_text: station the circuit includes an apparatus identical with that herein shown, arranged
for receiving the message (as will be presently explained) and is completed by the
ground back to the other pole of battery 46.
The current traversing this circuit energizes the magnets 31, 42 and 35; but the
latter magnet is constructed to be rather sluggish, by making its cores comparatively
solid and heavy, as is well understood by those skilled in the art, while magnets 31
and 42 are constructed to be rapidly energized and discharged. The effect of this
is, that as soon as the circuit is closed as above described, the printing lever is instantly
actuated and prints the letter "
A "
upon the paper (not shown) and a part of
magnetic disc 41 is instantly exposed to a dense magnetic field, whereby said disc
and the mechanism connected therewith would be suddenly arrested, if it had not
been already arrested by the interception of stop 13 by a stop-lever. In transmitting
the brake-magnet has thus only an auxiliary function; it assists in holding the
cylinders and type-wheel in position and relieves the stop-lever of a part of the pressure
of the stop upon the same.
The printing lever is somewhat elastic and after the impact with the type-wheel it
rebounds, leaving the paper free to be fed forward. At this instant the spacing
magnet attains its full force and actuates the carriage to feed the paper in position to
receive the next stroke of the printing lever. If now, the key is released, all parts
return to their normal positions and are ready for the repetition of the operation,just
described. In this manner any desired message is printed by the manipulation of
the proper keys, and at the same time electrical impulses are sent over the line,
which at the distant station cause the printing of the message in the receiver.
In order to enable the operator to make a space between a word just printed and
the next succeeding word of the message, one of the keys, denominated the "spacing
key," is connected with a stop-lever which intercepts a stop upon one of the cylinders
so located as to arrest the type-wheel with the space 10', facing the head of the
printing lever. If this spacing-key is depressed, all the operation above described
will be repeated, with this difference, however, that no letter or other character will
be printed upon the paper.
If the apparatus is to be used as a receiver, switch 71 is closed, and switch 50 is
opened, while switch arm 55 is turned upon button 54, as in transmitting.
In order to clearly understand the operation of the apparatus as a recording
receiver, it should be remembered that the transmitter, which is now supposed to be
at the distant station, has its type-wheel rotated in unison with the type-wheel of the
receiver at the home station, so that the same letters or characters upon the two
tpye-wheels are simultaneously passing before the heads of the printing levers at
both stations. This being understood, it will be seen that if a given letter say "A"
is being printed at the distant transmitter, the same letter "A upon the type-wheel
at the receiver will face the head of the printing lever, and the printing of the said
letter at the receiver will be effected as follows:
The electrical impulse sent to line by the transmitter, simultaneously with the
printing of the letter "A" will enter the receiver at the switch arm 55, and will then
proceed by wire 53, binding-post 52, wire 60, to and through the coils of magnet 42;
leaving said coil by wire 61, the current will traverse the coils of spacing magnets 35
and 36, from whence it will continue by wires 62 and 63 to and through coils of
electro-magnet 31, leaving the same by wires 64, and then by wires 73, contact
button 72, switch 71, wire 70, battery 46, and by wire 47 to ground. It will be
understood that the battery at the transmitter is in series with that at the receiver,
so that both instruments are actuated by the combined current from the two
batteries.
The electrical impulse sent to line by the transmitter simultaneously with the
printing of a letter (in this instance, the letter "A") traverses at the receiving
station, as has been seen, the coils of magnets 42, 35 and 31, at the instant when
letter A upon the type-wheel appears in front of the head of the printing-lever.
Magnets 42 and 31 being instantly energized, the rotation of magnetic disc 41 and of
the type-wheel is suddenly arrested; at the same instant armature 30, is attracted
"
12

page_text: by magnet 31, and the printing lever strikes the paper (not shown) against the
type "A" upon the type-wheel; an instant later, while the printing lever is rebound-
ing, the sluggish spacing-magnet attains its full force, and the carriage is actuated to
move the paper one space in position to receive the next imprint.
When it is desired to use the instrument as a local instrument like an ordinary
mechanical type-writer, switch 71 is opened, switch 50 is closed, and switch arm 55
is disconnected from button 54; preferably this switch arm is thrown over into contact
with button 56, whereby the line is grounded through the call bell 58. Thus, if at
any time, while the home instrument is used as a local type-writer, a key at the
distant transmitter is depressed, the bell 58 will respond, warning the attendant to set
the switches for receiving.
If arranged for local use, as above described, the circuit of battery 46 is a local
circuit which is closed by the depression of any key of the key-board, the same as in
transmitting. If such key is depressed, the corresponding stop-lever will intercept
the corresponding stop upon one of the cylinders 9, 9, will arrest the type-wheel in
proper position to receive the stroke of the printing lever, and will close the local
circuit, which will be as follows: From one pole of battery 46, by wire 70, to
casting 23, stop-lever 22, and by the intercepted stop 13 and the cylinders to brush 67 ;
then by wires 66 and 64 to and through coil of electro-magnet 31, wires 63 and 62,
to and through the coils of spacing magnets 35, 36, and by wire 61 to brake magnet 42.
From this magnet the circuit continues by wire 60, binding-post 52, wire 51, switch 50,
and by wires 48 and 47 back to the other pole of the battery. The current traversing
this circuit will actuate the apparatus in the same manner as in transmitting, and it is
therefore, unnecessary to further explain this phase of operation.
It will be noticed that by the construction shown, the shock received at the free
end of a stop-lever, when a stop of one of the cylinders is intercepted by the same,
passes through the fulcrum of such lever, and is consequently, not transmitted to the
key-lever; the finger of the operator resting upon the button of the key-lever does
not, therefore, receive a shock, which greatly adds to the ease and comfort of
operation, and also prevents the bending of the key-levers and the loosening of their
pivots.
The type-wheel which it is preferable to use in this improved apparatus is illustrated
in Figs. 3 and 4.
The shaft 11, upon which the type-wheel is mounted, has a number of segmental
recesses 74 separated from each other by ridges 75. The type-wheel itself is com-
posed of a number of sectors 76, each sector composed of a part of the rim of the
wheel, and a segmental part of the hub of the same. The hub portion of each sector
fits exactly into one of the recesses 74, and the projecting inner ends 77 of the web of
the sector, overlap each one-half of a ridge 75. When the sectors of the type-wheel
are assembled as indicated in fig. 4, a sleeve 78 is passed over the hub segments and
is tightened about the same by clamp screws, as shown. The type-wheel has then the
appearance of being made of one piece, but may be removed from the shaft without
removing the cylinders 9. 9.
A more detailed description of the type-wheel is deemed unnecessary, since this
improvement is fully set forth and claimed in another application No. 12066 of even
date herewith.
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. In an electrical type-writer, the combination with a type-wheel and metallic
cylinders all rotating in unison; metallic stops upon said cylinders corresponding to
the types upon the type-wheel; of circuit-controlling stop-levers, one for each stop; a
printing and a spacing magnet included in a local circuit with the cylinders and stop-
levers; a key-board controlling said stop-levers; a line circuit; and switches and
connections whereby the local circuit may be connected with the line circuit.

page_text: 2. The combination with a circuit-controlling key-board of stop cylinders con-
trolled by said key-board; a local circuit also controlled by said key-board; printing
and spacing mechanism controlled by said local circuit; a main line circuit; and
switches and connections for connecting and disconnecting said local circuit with the
main line circuit.
3. In an electrical type-writer the combination of a type-wheel and cylinders of
conducting material rotating with the same about a common axis, and provided with
metallic stops corresponding to the types upon the wheel; with an independent
metallic stop-lever for each stop normally out of contact with the cylinder but movable
into the path of the stop; an electro-magnet and a printing lever actuated thereby ; a
sluggish spacing magnet for moving the paper after the imprint has been made; and
a key-board for actuating the stop-levers to stop the type-wheel and cylinders, and to
close the circuit of the magnets; substantially as described.
4. In an electrical type-writer, the combination of a type-wheel and metallic
cylinders rotating with the same about a common axis, and provided upon their
surfaces with metallic stops corresponding to the types upon the wheel; with circuit-
controlling stop-levers, one for each stop; a printing and a spacing magnet included in
a local circuit with the cylinders and stop-levers; and a key-board for controlling the
stop-levers; substantially as described.
5. In an electrical type-writer, the combination of a type-wheel and cylinders
rotating with the same about a common axis, and provided with stops corresponding
to the types upon the wheel; with a stop-lever for each stop having one straight arm
movable into the path of the stop and the other arm curved to form a hook; and a
key-lever for each stop-lever, having a projection at one end engaging the curved
arm on the stop-lever; substantially as described.
6. In an electrical type-writer, pivotal support for the operating key-levers, con-
sisting of a casting, having upon a central stem or branch, a series of parallel slots for
the reception of the levers, and a series of lugs alternating with the slots for the
reception of a pivotal rod common to all the levers; and two lateral branches
constituting the common front and back stops, respectively; substantially as
described.
7. In an electrical type-writer, the combination of a series of levers in operative
relation to the type-keys; with a pivotal support for the stop-levers consisting of a
casting having a longitudinal rib divided into alternate slots and lugs, the latter
being connected by a web serving as the front stop of the levers; substantially as
described.
8. A pivotal support for a series of independent levers consisting of a casting having
a longitudinal rib divided into alternate lugs and slots, the former being connected by
a web serving as the front stop of the levers; and a flange parallel to the rib serving
as a back stop for the levers; substantially as described.
Dated this 91st day of Avant 1000