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Патент USA US2117235

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May 10, 1938.
B. BAUMANN
2,1 17,235
TYPE-WRITER
Filed May 9, 1934
2 Sheets-Sheet 1
In vénton :
5. w“ Win71
May 10, 1938.
B. BAUMANN
2,117,235
TYPEWRITER
Filed May 9, 1954 ‘
2 Sheets-Sheet '2
Inventor’:
5. 54am???” ‘
awwwy?ié
enema‘ M41710. 1938
2,117,235 ’
UNITED STATES PATENT OFFICE
2,117,235
I
'
TYPEWRITER
. Berthold Baiimann, Nuremberg, Germany, as- ,
signor to Triumph-Werke Nuernberg A.-G.,
Nuremberg, Germany.
Application May 9, 1934, Serial No. 724,811
In Germany May 13, 1933
3 Claims.
((1197-28)
This invention relates to a novel kind of actu
by the’pull bar g with the pin h of the second in
ation for the type levers of typewriters, in which
two intermediate levers are interposed between
termediate lever is which is pivoted on the bear
ing shaft 2'. The pin m of this intermediate lever
' the key lever and the type lever. It has this > . k engages in the slot 11 of the type lever 11 which
5 advantage over the known arrangements, that . is pivoted on the bearing shaft .0 and the type 5
the type lever experiences an additional accel
head q of which, when in its extreme position.
erationin about the second half of its swinging strikes against the platen r. The members of
motion towards the platen, but that the pressure the system‘ so far described are known. A new
applied to the key remains, practically the same feature is the provision of a second pin s on an
10 and equally soft and elastic during depression arm t of the second intermediate lever k and
of the key. As the return swing of the type lever the provision of a second slot u in the type lever
also takes place with an additional acceleration, p. Through‘ the provision of these means ac—
a very great increase in typing speed results, cording to the invention the additional accelera
-which could not be obtained with the typewrit
tion of the type lever is obtained in the follow~
1-3 ing systems hitherto known. '
_
.
While type lever actuating systems are known,
in which the type lever is accelerated towards the
end of its swinging motion, in the arrangement
according to the invention this known accelera
tion has an additional positively regulatedaccel
eration imparted to it.
.
A further feature of the invention consists in
this, that for obtaining the additional accelera
tion of the type‘lever, the second intermediate
25 lever which engages with it has, besides the usual
engaging pin, a second engaging pin lying fur~
ther away from the point of rotation of the in
termediate lever and‘that the type lever has in
addition to its usual slot forthe ?rst engaging
30 pina second engaging slot for the second engag
ing pin. The means employed for obtaining these
conditions of motion are characterized by great
constructional simplicity which ensures ,a re
liable action;
35
'
In the accompanying drawings a constructional
example of the type lever-actuating means ac,
ing manneri
-
_
_
15
The key displacement is divided into ten equal
parts which are marked by horizontal lines 0 to ,
I0, so that there are 11 positions. To these 11
positions 0 to H] of the key lever there corre
spond the positions 0 to II] of the pin 1'' on the
?rst intermediate lever e. Through the conver
sion of the almost straight line downward mo
tion of the pin 0 into the rotary motion of the
?rst intermediate member e, an acceleration of >
the pin f is obtained in a known manner, which '25
will be seen from the constantly increasing paths
between the individual positions. The distance of
travel 9 to ill of the pin 1‘ is already considerably
greater than the distance D to I. The motion oi
the pin svand that-of the pin m take place in a
similar manner, as long as the latter is in en
gagement with the slot 11, and consequently the
motion of the type head q in the ?rst half of its
swinging motion.
In an intermediate position, however, (Fig. 3)
which is marked 3:, a change in the velocity and
cording to the invention is illustrated,
the acceleration occurs. In this position the pin
Fig.‘ 1 showing the actuating system in the po- ‘ m leaves the slot 11 of thertype lever p and the
sition of rest,
pin s enters its slot u. ‘As the distance of the pin
Fig. 2 the second intermediate lever to an en a s from the bearing shaft'i is greater than the
40
larged scale in its initial and its ?nal position,‘ distance of the pin m from this hearing shaft
and "
‘
,
- (Fig. 2), an acceleration takes place, that is to
Fig. 3 an intermediate position of the actuating say the type lever 10 is turned more rapidly from
members, which is marked :1: and from which the position a: onwards. Owing to the greater
iio‘nwards to the known acceleration of the type
radius there is however not only an increase 46
in the angular speed, but also an acceleration of
In all three ?gures of the drawings 11 posi
this increased speed. as owing to the slot guide
tions are indicated by the numerals 0 to 10 of ' of the pin s in the slot 11. the distance of the pin
the separate actuating members and a special s from the fulcrum o constantly decreases. ‘These
0 position :17 from which onwards the additional ac
increases in the speed and the acceleration of the 50
celeration commences.
‘
_
‘
~
type lever could not be obtained with the toothed
_ The actuating system consists of the key lever gearing hitherto used.v
‘
b which is pivoted on a bare and the pin 0 of
In Fig. 2 the enlargement of the increasing
which engages in the slot d, of the ?rst inter
distances‘ of travel due to the greater radius i-s _
medate lever e, the pin for which is connected instead of i--m will be seen, while Fig. 1 shows I‘
lever any additional acceleration is added.
2
2,117,235 ‘
the increasing distances which correspond to
equal distances in the depression of the key,
more particularly from the position a: onwards.
What I claim is:
>
1. A type bar action for typewriters, compris
motion of the ‘traction bar to the type lever and‘
- a second driving member on the second inter-5
mediate lever at a'di?erent distance from the
pivotal axis thereof than the ?rst driving mem
ber and arranged to engage‘the type lever sub
ing in combination a key lever, a type lever, a
traction bar interposed between said levers, an
intermediate lever connected with one end of
said traction bar, a driving connection, between
10 the key lever and said intermediate lever for im
parting movement to the intermediate lever and
sequently to the ?rst mentioned driving mem-v
ber and with a continuously increasing leverage
traction bar with continuously increasing accel—
movement of the type lever.
3. A type bar action for typewriters, compris
ing in combination a key lever having a driving
eration during the entire range of movement of
7 said key lever and a second intermediate lever
15 connected with the opposite end of the traction
bar and having driving means arranged to en
gage the type lever to transmit the motion of
the traction bar to the type lever and further‘
driving means on the second intermediate lever
arranged to engage the type lever subsequently
to the ?rst mentioned driving means and with
a continuously increasing leveragevso as to im
part a ?nal movement to the type lever with an
so as to impart a- ?nal movement to the type
lever with an increased acceleration over that
applied thereto by the ?rst mentioned interme 10
diate lever and produce a‘rapid initial return
pin thereon, a traction bar, an intermediate lever 15
connected with one end of said traction bar and
having a slot:therein in engagement with said
driving pin and so directed that during the move
ment of the key lever the driving pin travels to
wards the pivotal axis of the intermediate lever 20
so as to actuate the intermediate lever with con
tinuously increasing acceleration during the en
tire’ range of movement of the key lever, a sec
increased accelerationw over that applied thereto ond intermediate lever connected with the oppo
25 by the ?rst mentioned intermediate lever and site end of the traction bar and having a driv 25
produce a rapid initial return movement of the ing pin thereon, a type lever having a slot there
type lever.
’
in in engagement with the driving pin on the sec
2. A type bar action for typewriters, compris ond intermediate lever for imparting initial
ing in combination a key lever, a type lever, a movement to‘ the type lever and a second driv
30 traction bar interposed between said levers, an ing pin on the second intermediate lever at a 30
intermediate lever connected with one end of greater distance from the pivotal axis thereof
said traction bar, a driving connection between than the ?rst mentioned driving pin thereon, the
type lever having a second slot arranged for en'
the key lever and said intermediate lever for im
parting movement to the intermediate lever and gagement with the second driving pin on the
35 traction bar with continuously increasing accel- - second intermediate lever for imparting ?nal 35
eration during the entire range of movement of movement to the type lever with an increased
said key lever and a second intermediate lever acceleration over that applied thereto by the .
connected with the opposite end of the traction traction bar.
bar and having a driving member thereon en
BERTHOLD BAiiMANN.
40 gageable with the type lever to transmit the
40
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