Improvements in or relating to Cylinder or Wheel Type Writing Machines.
Year: 1898

page_text: Date of Application, 22nd June, 1898 -Accepted, 13th Aug., 1898
COMPLETE SPECIFICATION.
Improvements in or relating to Cylinder or Wheel Type Writing
Machines.
I, EUGEN EDELMANN, of Sebastian Street 72, in the City of Berlin, Germany,
Manufacturer, 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:-
My invention relates to that class of type writing machines in which the types
are arranged on the surface of a wheel or a cylinder, and selected and printed by
means of a single key lever susceptible of a horizontal and a vertical swinging
movement; and the object of my invention is to provide a comparatively large
stroke for the type wheel or type cylinder, so that the printed type is always visible
to the operator in the raised or in the operative position of the type carrier (wheel
or cylinder) and manifolding can be performed.
I attain these objects by the means represented in the accompanying drawing,
in which Fig. 1 is a side view of my invention showing the type cylinder in its
raised or inoperative position, and Fig. 2 a top view of the same, the type cylinder
being depressed and in printing contact with the paper carrier or platen.
Referring now to the drawing, a frame plate 1 is provided with a guide way
for the paper carriage supporting the platen 2, and with a support 3 for the key
lever 4. Two uprights 56 extend from plate 1, provided with pivots for a rocking
frame 7 of the type cylinder 8 and supporting a top plate 9. A crown wheel
segment 10 is loosely mounted on a vertical stud projecting from support 3, and
provided with a square hub 11, to which the forked end of the key lever 4 is pivoted,
the latter thus being susceptible of a horizontal and a vertical swinging movement.
The type cylinder is firmly mounted on a shaft 12 which passes through a hollow
shaft 13 journaled in the rocking frame 7 and carrying at one end a toothed con-
trolling wheel 14 with a pin 15 and at the other end a pinion 16 engaging with the
toothed edge 17 of segment 10. Pin 15 extends through a bore hole of the type
cylinder so as to take along with the latter whenever shaft 13 performs its turning
movement, and allowing at the same time of a longitudinal shifting movement
of the type cylinder in the case the latter should be provided with a plurality of
circular sections or ranges of types as commonly and as supposed in the drawing.
This shifting movement may be performed in the well known manner by means
of special shifting keys and a lever controlled by the same and actuating shaft 12
against the pressure of a spring 121; but as this arrangement is old and forms no
part of my invention I have not represented the same in the drawing.
Key lever 4 is provided at its free end with an arm 18 carrying a handle 19
and a blade 20. A bent plate 21 is fixed to the lower end of plate 9 and provided
with vertical recesses 22 corresponding each to one of the longitudinal type rows
of the type cylinder and marked accordingly in the well known manner by
corresponding letters or numerals registered on sections abc of plate opposite
to the several recesses. By these means the type of the type cylinder to be printed
will be selected by horizontally adjusting key lever 4 so as to bring blade 20

page_text: opposite the recess controlling the respective longitudinal type row of the type
cylinder, and by depressing the special shifting key which controls the corresponding
circular section of types of the type cylinder. The printing is then performed by
depressing key lever 4 to enter the opposite recess, as follows.
Two rods 25 are pivotally suspended on the type cylinder frame 7 at 23 and 24 5
and connected to each other by a horizontal bar 26 extending underneath key
lever 4. Therefore, by depressing the latter, as heretofore described, bar 26 and
rocking frame 7 will be taken along with and the type cylinder carried against
the platen, whereby the type cylinder is definitively adjusted by the controlling
wheel 14 engaging, as commonly, with a knife edge 28 of an arm 29 projecting 1
from plate 9. When releasing or raising the key lever the type cylinder is restored
to its normal or inoperative position, Fig. 1, by means of a spring 30 fixed to
plate 9, an elastic abutment 31 serving the purpose of weakening the impact and
deadening noise.
From the foregoing description it will appear that in consequence of the arrange- 1
ment of the type cylinder frame 7 and its connection with the key lever 4 a
comparatively large stroke or rocking movement of the type cylinder can be
obtained with the double effect to render always visible the printed type and to
enforce the impact of the type cylinder against the platen for manifolding purposes.
The shifting of the platen is performed by the well known means, forming no 2
part of my invention and therefore not represented in the drawing.
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 as my invention is:-
In a type writing machine, the combination of a rocking frame carrying a type 2
wheel or type cylinder, a horizontal working bar suspended from the rocking
frame, a toothed segment loosely mounted on a stud of the frame work of the
machine and engaging with a pinion of the type wheel or type cylinder shaft,
and a swinging key lever pivoted to the toothed segment and extending above
and across the said horizontal working bar, substantially as and for the purposes
described.