Year: 1890

page_text: Date of Application, 20th Sept., 1890-Accepted, 1st Nov., 1890
unnecessary.
1933
Referring to the drawings ;-
par cura description thereor WILL
Fig. 1 is a plan with portions removed and parts in section of a machine embodying
this invention.
Fig. 2 is a longitudinal section on an enlarged scale taken at X Fig. 1.
Fig. 3 is a vertical section of the carriage-supporting wheel or casting and adjacent
parts on the line Y of Fig. 1.
Fig. 4 is a vertical section of the spool-standard taken on the line Z of Fig. 1.
Fig. 5 is a rear elevation of the parts shown in Fig. 4 one of the ribbon-spools and
its spindle being removed.
Fig. 6 is a detailed plan of a portion of the bail.
Fig. 7 is a horizontal section through the bearings of the type bracket.
Fig. 8 is a perspective of the adjusting rivet employed in the type bracket and
Fig. 9 is a plan of the bail.
Like letters refer to like parts in all the figures.
A is the platen of the machine consisting of the coating or shell A' of rubber or
other suitable material and core A2 which is bored at each end for the reception of a
gudgeon or journal A³, with which may be employed if desired, a sleeve or lining A*.
In either case the gudgeon or journal A³ should be fitted truly in the axial line of the
platen, the object of the sleeve being to prevent undue wear in the removal of the
platen from the machine in the manner hereinafter described. A is the usual metallic
end piece employed on type writer platens and its hub A is screw-threaded for the
reception of the similarly threaded portion of the journal or gudgeon which latter is
extended through the standard or bracket on the carriage in which the platen is
journalled and is provided with the usual line feed ratchet A'. The opposite end of
the platen is constructed in like manner and the projecting journal has mounted thereon
the bell A. Depending from the carriage at any suitable point is the bell trip
connected in the usual manner with the hammer which is arranged to strike the bell.
The bell A serves as a knob for rotating the platen when introducing paper into the
nachine.
B represents the carriage caster or roller in front of which (see Fig. 3) is the
depending hook B₁ which takes under a rod B2 extending across the base of the
nachine. The object of this rod is to prevent the carriage and the platen thereon
rom being lifted upwardly from the base when the paper is being suddenly removed
rom the platen. This object is attained by reason of the hook B₁ coming in contact
with the rod B. The said hook is preferably arranged a slight distance below the rod
o that no undue friction or resistance to the movement of the carriage across the
achine will be occasioned.
C (Figs. 1 and 2) represents a margin gauge. It consists of a plate having a slot C

page_text: therein, and within the slot is mounted for movement a bell trip operating pin C³.
Heretofore there has been employed a gauge plate with a series of holes into one of
which a pin might be arranged so as to actuate the bell trip. In such a construction
the pin is liable to be lost and it requires more or less time and trouble to change it
from hole to hole in the series. The object of this improvement is to provide a bell
trip pin which can be readily changed in position and which will remain where placed.
To accomplish this object 1 connect the pin C² with the plate C, in such a manner that
it shall be capable of movement along the plate and shall be held by friction at any
desired point.
In this instance the pin C has a comparatively broad base C³ and is recessed or
perforated for the reception of a screw which is passed first through a washer C³,
then through the slot C¹ of the plate C, and then into the pin C, as clearly shown
in Fig. 2. When struck at its upper end by the bell trip the force of the blow has a
tendency to tilt the pin C2 which is strongly resisted by its frictional contact with the
plate C, and therefore the pin is not moved along the slot in said plate, but when force
is applied near the base of the pin 2 by a finger it can be easily moved along the
slot and in this manner a ready adjustment of the machine to margins of desired
width is accomplished.
D represents the usual type-bar supporting-plate employed in this particular class
of machines, and D¹ represents one of the type bar brackets which is illustrated on a
larger scale in Fig. 7. D2 represents the type bar which in this instance, has concave
bearings to fit convex bearings formed in the arms D³ of the bracket D, as clearly shown
in Fig. 7. The improvement in this feature of the machine refers more particularly
to rivet E which is employed for securing the type bar in the bracket. This rivet
consists of the body or shank E¹ the end of which is recessed as shown at E³, and
the head E3 of which is eccentric to the axial line of the body for a purpose hereinafter
specified.
In
In constructing the brackets D¹ the arms D³ thereof are unavoidably more or less
out of parallelism with each other. This parallelism can, if desired, be intentionally
provided for in the construction of the bracket so that the other faces of the arms D³
are disposed at another than a right angle to the axial line of the pivot. In mounting
the type bar D2 to the bracket D₁ the rivet is passed through the arms D3 and through the
intervening bearing of the type bar and is upset at its recessed end to fill the opening
in which it is located more or less snugly. This opening if desired may be counter-
sunk and the rivet may he upset to overlie the exterior face of the bracket arm.
any event it is only desirable that the rivet should be prevented from withdrawal from
the arm at its opposite end. Now it will be noticed by referring to Fig. 7 that when
the rivet is rotated from the position shown in full lines to that shown in dotted lines,
the eccentric head E³ by coming into contact with the inclined outer face of the
adjacent arm will act as a cam and thus draw the two arms more or less closely against
the bearings of the type bar. In this manner the wear of the bearings is taken up.
This forms a valuable feature as hitherto there has been experienced great difficulty
in manufacturing screw-threaded devices for binding the arms of the bracket to the
type bar and for taking up the wear of the parts by reason of the required smallness
of the screws and the fineness of its threads. By the foregoing improvement however
these objections are obviated and a strong serviceable and adjustable construction is
secured at one of the most delicate and readily worn parts of the machine.
Referring now to Figs. 4 and 5, F represents an oscillating ribbon carrier having
diagonal turning guides and connected with the universal bail of the machine. The
improvement in this instance has reference to the particular means employed for
automatically reversing the movement of the ribbon and for accomplishing other
results now to be specified.
Referring to Fig. 9, G represents what I have designated as the universal bail of
the machine. It consists of a single casting having the advantage of obviating the
necessity of boring holes and making joints at the exact distances and at the required
points for the connection with the ordinary rock shaft of the bridge pieces and parallel
bail.pieco proper as these parts have heretofore been constructed. The bail G consists

page_text: of the pivot bar G₁ recessed at each end as shown at G2 by dotted lines for the
reception of pivot screws. Parallel to the pivot bar G' is the bail proper G³. At
each end is a plain bridge G4 and at the centre is a widened bridge G having
perforations G and G7 therein. Extending beyond the pivot bar G¹ and opposite the
centre bridge G³ is a forked bracket Go to the two arms of which are secured the side
pieces of the ribbon support F. In this instance I disclose a novel construction for
the purpose of adjusting the inclination of the support F with relation to the bracket G
the purpose of which is to move the inking ribbon at the printing point to or from the
printing point on the platen. This construction for adjusting involves the pivot
screws F passing through the plates F into the arms of the bracket G8 and the
eccentric shaft F having projections of some kind to pass through said plates, in the
example illustrated through slots F³. The projections in this instance consist of
screws F carried eccentrically in the ends of the shaft F2. A hole F5 or any other
wrench hold is formed in the shaft F2 so that the same can be readily rotated. In
Fig. 4 the eccentric projections F of the shaft F consist of pins. Now it will be
readily seen that by rotating the shaft F2 the plates F are partially rotated on the
pivots F whereby the ribbon carrying ends of the plates F are thrown forward or
back wark in relation to the printing point of the machine. H represents the lower
end of the oscillating standard which carries the feed pawls that co-operate with the
usual rack bar arranged longitudinally along the under side of the carriage. The
present improvement in this part of the machine has reference to means for adjusting
said standard in order to regulate the time of escapement of the pawls from the feed
rack on the carriage and it consists in providing the binding screw H¹ having
preferably a ball or convex face H2 on the side of its head towards its threaded body
which ball or face is fitted to a concave or countersunk recess at the aperture G in
the central bridge G5 of the bail. In the aperture G' there is threaded an adjusting
screw H³ which abuts against the lower end of the standard H, which lower end is for
convenience and illustration shown as bevelled with relation to its sides which are or
may be parallel. By slightly loosening the screw H¹ and loosening or tightening the
adjusting screw H³ it may be seen that the upper end of the standard carrying the
pawls will be tilted in a forward or backward direction as desired whereby the escape-
ment of the pawls from the rack bar may be regulated with relation to the oscillation
of the standard and of the bail on which it is mounted.
I represents the spool- and locking-plate supporting-standard which is secured to
the base I of the machine about opposite the printing point. Near the top of the
standard is a double headed screw 12 and between the heads of said screw a cross
bar F of the ribbon support F oscillates. The distance between the heads of the
screw I is sufficient to permit such oscillation of the ribbon support or carrier as will
expose a character when impressed on the paper. By introducing a screw driver
between the ribbon support and the platen, the screw 12 may be run out or in so as at
different times to cause different longitudinal portions of the ribbon to be brought to
the printing point it being understood that only a portion of the width of the ribbon
is utilized in making an impression; thus the entire width of the ribbon may be
subjected to use.
J represent the ribbon spools and J₁ the gear wheels with which the spools are
operatively connected. On the front of the standard I is the pivot K of an oscillating
plate K' which as shown in dotted lines in Fig. 5 is substantially tee-shaped and on each
arm of the tee is supported an anti-friction roller K². These rollers are arranged to
un opposite that portion of the spools which carries the ribbon so when spool is
illed the roller and arm beneath that spool are depressed so as to tilt the plate K
on its pivot. Projecting from the upper end of the plate K' is a spring K³, which
n this instance, is in the form of a close coil to give it resiliency in all lateral
directions, which spring is secured by a screw K₁ to the plate K¹, it
e secured in any other desired manner. This spring projects into a slot L¹ formed
may however
t the upper end of a plate L mounted on a pivot L² projecting from the back of the
tandard 1. The plate L has formed thereon two lugs L³ one of which in Fig. 5 is
hown projecting out from each vertical side or edge of the plate. M represent two

page_text: locking hooks which are pivoted by means of screws M₁ to the standard in a plane
passing back of the plate L. The upper ends of the locking hooks are held apart
by means of a two-armed spring N. At the lower end of the plate L there is
journalled a transverse shaft O carrying at each end a pinion O' which is adapted to
mesh with one of the gear wheels J. Centrally on the shaft is a ratchet wheel P and
on the face of the plate L is a detent P. The ribbon support F carries a pawl Q
which by means of a spring Q' Fig. 4 is held upwardly against the ratchet P. Pro-
jecting forwards from the plate K¹ is a stud K' and in each of the locking hooks M is
an adjusting screw M³. One of these screws is shown in dotted lines back of the
lug K in Fig. 4. The object of the screws M2 is to provide for the adjustment of the
movement of each of the locking hooks so as to adjustably determine the extent of
the escapement of each hook from the lugs L³ of the plate L, as hereinafter described.
The key levers R Fig. 1, of the machine are arranged to bear on the bail proper G³
so that when depressed the bail G is moved on its pivots and the ribbon support F
is caused to approach the printing point and when the key is released the ribbon
support recedes from the printing point. In this movement of the ribbon support
the pawl Q actuates the ratchet wheel P which rotates the shaft O and its pinions 01
and one of the latter gives movement to the gear wheel J₁ of that spool which is
winding up the ribbon. When that spool becomes filled with ribbon the roller K²
is depressed so as to tilt the plate K₁ and cause the spring K³ to bear yieldingly
against the side or wall of the slot L' of the plate L which is nearest the full spool.
The pressure of the spring K³ has a tendency to tilt the plate L to the right in Fig. 5.
Such tilting however is prevented by the locking hook M until by the displacement
of the plate K¹ and its lug K the latter makes contact with the adjusting screw M²
in said locking hook when said hook is disengaged from the lug L³ of the plate L
and said plate is then by reason of the power stored in the spring K³ quickly tilted,
so as to throw the pinion O¹ formerly in gear out of gear and that formerly out of
gear into gear with the respective spool-gear-wheels J. In this manner the winding
of the ribbon is automatically changed by the spools when they alternately become
.filled.
I do not confine myself to the exact details of construction herein shown and
described as without departing from the spirit of the invention I may alter the same
in many ways as will be apparent to persons conversant with the construction of type-
writing machines, such alterations for example may include simple reversals of the
devices herein shown and described with relation to each other, and as another example
it may be explained that in the rivet E employed for mounting and taking up the
wear of the type bar bearings, the inclination may exist in the under or inner face
of the rivet head E³ instead of upon the outer surface of the bracket arms D³.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent, and in what manner the
same is to be performed, 1 declare that what I claim is :-
:―
1. In a type-writer a platen removable from the carriage by means of removable
gudgeons or journals such as A³ substantially as described and illustrated in the
accompanying drawings.
2. In a type writer a platen provided with screw-threaded ends such as A° A in
combination with a journal such as A³ fitted therein and extending directly into the
platen or into a sleeve or lining such as A¹ fitted into said platen substantially as
described and illustrated in the accompanying drawings.
.
3. In a type writer the combination with the carriage and its wheel or caster B of
a rod such as B2 and hook B' taking under the rod and connected with the carriage
substantially as described and illustrated in the accompanying drawings..
4. In a type writer an adjustable bell-trip pin frictionally connected with its
.support.
5. In a type writer an adjustable bell-trip pin such as C (300 frictionally con-
nected with its gauge plate or other support substantially as described and illustrated
in the accompanying drawings.

page_text: 6. In a type writer the combination with a type-bar-supporting bracket such as D¹
of a revolvable rivet having an eccentric head substantially as and for the purpose
described and illustrated in Figures 7 and 8 of the accompanying drawings.
7. In a type writer as a means of taking up the wear at the bearing of a type bar
the employment on or in connection with the pivot pin of a cam face substantially as
described.
8. In a type writer a bail such as G formed in one piece and comprising a pivot
bar Ga bail proper G³ connecting bridges G and G and a bracket such as G8
substantially as described and illustrated in the accompanying drawings.
9. In a type writer the combination with the ribbon support F of a bracket such
as G to which the support is pivoted and an eccentric rod such as F2 F4 extending
from side to side of the support and having a bearing in the bracket substantially as
described and illustrated in the accompanying drawings.
10. In a type writer the combination with a bail and dog standard H of an adjusting
screw H³ and with or without an attaching screw such as H¹ H2 substantially as
described and illustrated in the accompanying drawings.
11. In a type writer the combination with a ribbon support such as F of a screw
such as I having two flanges or heads substantially as described and illustrated in
the accompanying drawings.
12. In a type writer the combination with the ribbon support F carrying a pawl Q
of a ratchet wheel mounted on a shaft O carrying pinions 0 and adapted to oscillate
whereby the pinions may be thrown into and out of gear with suitable gearing for
operating the spools substantially as described and illustrated in the accompanying
drawings.
13. In a type writer the combination with the ribbon support F of the ribbon
feeding device and a rail F¹ and double headed screw such as I² substantially as
described and illustrated in the accompanying drawings.
14. In a type writer the combination with the ribbon support and a pawl Q
mounted thereon of an oscillating plate such as L carrying a shaft O provided with a
ratchet wheel P and pinions O₁ and ribbon spools provided with gears J¹ and a
device operatively connected to tilt the pinion and ratchet carrying plate by pressure
exerted by the ribbon substantially as described and illustrated in the accompanying
drawings.
15. In a type writer the combination with the ribbon support of a tilting plate such
as L carrying a shaft O provided with pinions O¹ and ratchet wheel P of a plate such
as K' operated by a ribbon and connecting mechanism between the two tilting plates
substantially as described and illustrated in the accompanying drawings.
16. In a type writer the combination with the ribbon support of a plate such as L
carrying a shaft O provided with pinions O' and ratchet wheel P of a tilting plate
such as K' operated by the ribbon resilient connecting mechanism consisting of a
closely coiled spring such as K³ substantially as described and illustrated in the
accompanying drawings.
17. In a type writer the combination with the ribbon support having a pawl Q of
an oscillating plate such as L carrying ratchet and pinion devices and having lugs
such as L of locking hooks such as M and means for releasing the same substantially
as described and illustrated in the accompanying drawings.
18. The combination and arrangement of parts constituting the type writing
machine adjuncts substantially as described and illustrated in the accompanying
drawings.
Dated this 20th day of September 1890.
W. P. THOMPSON & BOULT,
Agents for the Applicant.