Improvements in Typewriting Machines.
Year: 1896

page_text: Date of Application, 13th May, 1896-Accepted, 4th July, 1896
COMPLETE SPECIFICATION.
Improvements in Typewriting Machines.
I, OTTO FERDINAND MAYER of 4, Charlottenstrasse, Berlin in the Empire of
Germany, Technologist, 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 for its object a typewriting machine in which the type are
arranged on the periphery of a typewheel, and adjusted into the printing position
by the rotation of said wheel, the impression of the type thus adjusted being then
effected by a radial pushing forward of the typewheel.
The paper carriage and the device for inking the type of the typewheel are not
within the compass of the present invention, and are therefore not shown.
In the accompanying drawings,
Figure 1 is a plan view of the machine, in which, for the sake of clearness, only
a portion of the type levers are shown;
Figure 2 is a vertical section of Figure 1, and
Figure 3 is a partial view of Figure 1, showing the position assumed by separate
mechanisms when a key of the right hand type group is depressed.
The arrangement and mode of action of this typewriter will now be described,
taking for example the action when a given key, for instance of the right hand
group of type is depressed.
If the key, which is movable in guide slots m¹ be depressed, this pressure is
conveyed by the corresponding key lever m to elbow levers n n¹ revolubly mounted
on a spindle 1. One arm n of this elbow lever nis formed as a universal
bail n o p, which is operated by a given number of type levers m all revolubly
mounted on the spindle 1. On the key being depressed the elbow lever n n
revolves on the spindle and presses with its arm n' against the radial edge of a
toothed sector g', which is revolubly mounted at h on a sliding frame 6 and which
gears with a toothed wheel g also carried by the said sliding frame b. By this
pressure against the radial edge of the toothed sector g', this latter is rotated on
its axis (against the action of a spring e firmly connected with said axis) until an
arm i firmly connected with it and having on its free end a pin which projects up
through a slot a' in the frame plate a strikes laterally the depressed type lever (see
Figure 3) and is thereby checked and limited in its movement.
By the rotation of the toothed sector g' and the toothed wheel g, a typewheel
mounted on the spindle f of the latter is adjusted into the position for impressing
the desired type.
If then the key which has been struck be pressed further downwards as the
toothed segment gl and the type wheel cannot further rotate, the sliding frame b
and all the mechanisms carried by it will be pushed backwards on to the paper
roller against the action of a spring 9, being guided by guide bars c c c in
guides d d' d' so that an impression of the adjusted type is effected on the
paper.
The depressed type lever on being released, springs back again into its
uppermost initial position by the action of a spring r connected therewith (see
Figure 2). The springs are not shown in Figures 1 and 3 for the sake of
clearness.
As the pressure on the elbow lever n n is relieved by the key returning to its
normal position, the sliding frame b will be returned by means of the spring q into

page_text: its initial position, which is determined by means of a fixed stop or contact piece.
Simultaneously the arm i is returned to its middle position by means of the spring e
on the spindle h, and the toothed segment gl, Figure 1, and thereby also the
gearing g and the typewheel f¹ are all returned to their normal positions, so that
a fresh key may then be struck for the purpose of impressing another type.
The same action is repeated on striking of any of the other keys, whether the
same belong to the right or left hand group of keys. A separate elbow lever n n'
is however provided for each group of keys, and the direction of rotation of the
toothed segment g' is different according to which group the key belongs which has
been struck.
Of course, the elbow lever n, n¹ of the one group of keys must remain without
action when that of the other group is pressed against the toothel segment g'.
This may be attained by the non-operated elbow lever n n' being raised so far by
means of a special spring that the toothed segment can travel unimpeledly beneath
it. If this special spring be omitted the unoperated elbow lever n noves with
its arm n loosely over the surface of the toothed sector g' when the latter
revolves, thus offering no special resistance. This latter case is assumed in the
drawing.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A typewriting machine with rotary type wheel, in which the impression of
the selected type is effected by the type adjusting mechanism being first blocked
by the depressed type lever and then by a further pressure on the key pushed
backwards together with the type wheel against the paper roller in straight guides,
substantially as described.
2. A form of construction of the herein described typewriting machine having a
rotary typewheel, which effects the adjustment and impression of the type by a
rotation and a backward movement respectively, in which on a key being depressed
a toothed sector which gears with a toothed wheel on the spindle of the type wheel
is rotated by means of a lever (n n') until an arm (i) firmly connected with said
sector bears with a contact pin (i) against the depressed type lever whilst on a
further depression of the key the toothed sector having its further rotation thus
stopped is pushed together with the type wheel backwards in straight guides by
the said lever (n n') against the paper roller substantially as described.
Dated this 12th day of May 1896.
WM. P. THOMPSON & Co.,
Agents for the Applicant.