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Патент USA US2128403

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«fîïug- 30» 1938-
T. o. R. DAHLBERG
TENS TRANSMITTING DEVICE FOR ADÜING MACHINES
Filed. Mav 18, 1935
I? SheeíS-Sheii‘t ly
Aug. 30, 1938.
T. o. R. DAHLBERG
2,128,403
TENS TRANSMITTING DEVICE lFOR ADDING MACHINES
Filed May 18, 1935
2 Sheets-Sheet
2.
f6
@IML
Patented Aug. 30, 1938
2,128,403
UNITED STATES PATENT OFFICE
2,128,403
TENS TRANSlVIITTING DEVICE FOR. ADDING
MACHINES
Tord Olof Rickard Dahlberg, Nockeby, Sweden
Application May 18, 1935, Serial No. 22,148
In Sweden September 13, 1934
4 Claims.
D
(Cl. 235-138)
The present invention relates to a tens trans
mitting device for adding machines having a
disconnectable totalizer wheel shaft and having
a counting rack displaceable on a setting bar,
which is displaceable nine pitches, the said count
ing rack being adapted during the tens trans
mitting to be moved one pitch after the setting
bar has returned to the Zero position and While
the totalizer is still in engagement. The said
tens transmitting device, which in the first place
is intended to be used in cash registers, is made
for the purpose of obtaining positive and safe
tens transmitting. In constructing the device it
has, therefore, been necessary to try to obtain a
there is, according to the invention, provided a
pawl I0 pivotally disposed on a stationary shaft
9, the said pawl consisting of a two-armed lever
in the embodiment shown. During the tens
transmitting the said pawl is adapted to be
brought into such operative position by means
considerable reduction of the number of members
the pawl I0 is adapted to force the tens trans
mitting element I2 to change its position whereby
constituting the tens transmitting means used
heretofore at the same time as it has been nec
essary to pay attention thereto that already each
separate part has worked reliably and safely and
20 that a durable shape has been given to the same.
The intended purpose has also been reached by
the device according to the invention and the
device is characterized substantially thereby that
a pawl, which is pivotable on a stationary shaft,
is adapted during tens transmitting to be brought
into such position (operative position) by the
counting wheel that it blocks a tens transmitting
element moving parallel to the setting bar and
forces the latter to change its position and to
displace the said couting rack at the same time.
An embodiment of the invention is illustrated
diagrammatically in the accompanying drawings,
the parts constituting the device being shown in
Figures 1 and 2 in two diiferent positions.
In the drawings, numeral I indicates the
toothed wheel of the totalizer wheel 2, the shaft
3 of the former being displaceable towards and
away from the counting rack 5, which is dis
placeable on the setting bar 4. The counting
rack, which is guided by two pins 6 extending
into longitudinal slots 'l provided in the rack 5
tends to be held in the position shown in Figure
1 by a spring 8. The setting bar 4 may be dis
placed nine pitches the slots l of the counting
rack only admitting of a displacing movement of
the last mentioned rack corresponding to one
pitch. In the type of adding machines in ques
of a shoulder, pin or the like II of the totalizer
2 that it comes in the path of a tens transmitting
element I2 movable in the return direction of
the setting bar. The element I2 consists of a 10
two-armed lever, which is pivotally connected
parallel to a member I3 moving with the setting
bar 4, the said member receiving its motion from
a cam disk or the like. In its operative position
said counting rack is displaced.
To retain the pawl I0 in operative and inop
erative position respectively there is provided a
draw spring I4, one end of which is united with 20
one end of the pawl Il) and the other end of which
is fixed on a pin I5 so located relative to the
pivot 9 of the pawl, that the lever I0, when it is
between two stationary shoulders I6, I'I, which
limit the pivoting movement of the pawl, will 25
assume a position of unstable equilibrium.
To
return the tens carrier element I2 to the initial
position there is a pressure spring I8.
When a ten is to be transmitted the pin I I of
the totalizer wheel 2 of the next lower denomi- "
nation actuates one end of the pawl IU and
moves the pawl in the direction of the arrow in
dicated in Figure l, the pawl, when the position
of unstable equilibrium has been passed, being
automatically forced by the spring I4 over to the
active position shown in Figure 2. The turning
of the totalizer wheel takes place during the
downwardly directed movement performed by the
setting rack with connected counting rack in or
der to reach its resting or zero position. When
the said position has been reached, the member
I3 moves towards its lower end position, the pawl
I0 blocking one end of the tens transmitting
member I2, and its other end, which is being
pivoted downwards, actuating the counting rack
5 representing the next higher value and displac
tion, as shown for instance in U. S. Patent No.
ing the same one pitch, a corresponding turn
1,185,696, and U. S. Patent 2,091,758, this latter
displacement, which occurs during the tens trans
mitting takes place after the setting bar has re
turned to the zero position, but while the totalizer
is still in engagement, thus, when the parts assume
the positions shown in Figure 1. In order that
ing being imparted to the counting wheel, which
this tens transmitting Shaîl take place Positively
is in engagement with the rack in question.
After, in the above described manner, all tens
have been released or transmitted in their proper
turns the totalizer wheel shaft 3 together with
totalizer wheels blocked thereon is displaced
Aaway from the setting bar, whereby alsoy the 55
2
2,128,403
counting rack 5 is released and by means of a
spring 8 is returned to its initial position.
A pivotable link 20, which is provided with a
projecting pin I9 or the like, upon each displace
ment of the totalizer Wheel shaft 3 away from
the setting bar 4 forces the pawl I0 back to its
inoperative initial position. The link 2U is actu
ated against a spring 2| by means of some suit
able driving device, for example lever arm 22 -en
gaged with the totalizer wheel shaft 3 so as to
transmit to link 20 a pivoting movement in the
direction indicated by an arrow in Figure 2.
The operation is as follows. When the ma
chine is started the counting wheels are out of
engagement with the racks 5, the latter assum
15
ing the relative positions with respect to the bars
4 shown in Figure l. By key actuation the bars
and racks of the machine are then caused to as
sume positions of various heights corresponding
20 to various numerical values, but the positions of
the bars 4 and racks 5 with respect to each other
are, however, unchanged. When setting has
taken place the counting wheels enter into en
gagement with the bars and racks and when the
racks are moved in downward direction the
25 wheels are rotated by amounts corresponding to
the setting of the bars.
If, however, the count
ing wheels, when entering into engagement with
the racks, assume positions corresponding to the
999 and only the unit figure “one” has been
80 figure
entered on the machine, the pin II of the unit
wheel, when the racks move downwards, will
actuate, when the wheel passes from 9 to 0, the
pawl I0 of the tens’ wheel and shift said pawl
to the position shown in Figure 2. When the bars
35 have reached their home or normal position, all
of the members I3 begin to move downwards be
ginning with the tens’ member and continuing
with the hundreds’ member etc. in their proper
turns. During this movement the member I2,
which is carried by the tens’ member I3, hits
the corresponding pawl I0, by which the corre~
sponding counting rack 5 is displaced one more
Several embodiments may of course be devised
within the scope of the invention and the various
members or elements may be shaped and also
be combined in manifold different Ways.
Having now described my invention, what I
claim. as new and desire to secure by Letters Pat
ent is:
1. An adding machine comprising for each
denomination a setting bar, a counting rack car
ried on and displaceable one pitch with respect
to said setting bar, a reciprocating totalizer wheel
adapted to be alternately engaged by and dis
connected from said counting rack, a cam con
trolled member movable in a direction parallel
to the counting rack, each member of the suc
cessive denominations being actuated in its proper
turn when the setting bar is in its home position
and the totalizer wheel is still in engagement with
the counting rack, a displaceable abutment ele
ment disposed on said cam controlled- member „
for engagement with the counting rack, means
to normally keep said element in an inoperative
position, a stationary support, a transfer initiat
ing pawl pivoted on said support, means on the
totalizer wheel of the next lower denomination to
bring said pawl into a predetermined position in
the path of said abutment element on said cam
controlled member, when said totalizer wheel of
the next lower denomination passes from nine
to zero, and means to retain said pawl in said po
sition, whereby said abutment element encoun
ters said pawl during movement of said cam con
trolled member and is displaced so as to trans
mit one pitch of said movement to the counting
rack and totalizer wheel.
2. The combination set forth in claim l, in L
which said abutment element also comprises
a two-armed pivotable lever, one arm being en
counterable by the pawl when the latter is in op
erative position, the other arm engaging with the
counting rack.
3. The combination set forth in claim l, in
which said pawl comprises a two-armed lever, in
pitch. During this operation the tens’ counting
combination with stationary shoulders limiting
wheel is shifted from 9 to 0, whereupon the pin
II of the said wheel shifts the pawl II corre
sponding to the hundreds’ wheel, and when the
corresponding member I3 reaches its lower po~
sition the hundreds’ wheel, via the counting rack,
the pivotal movements of the lever, and said 4.3
means to retain the pawl in operative position
include a dead center spring actuator for urging
is shifted from, 9 to 0, and in this manner the
60 transmission is continued until all of the count
ing wheels have been shifted. After that the
counting wheels move out of engagement with
the racks and the members I3 move to their up
per positions whereupon the bars 4 and racks 5
reassume the relative positions shown in Figure 1.
the lever into one or the other of its extreme
positions.
4. The combination set forth in claim 1, in- ,
cluding further means arranged to be actuated
by the reciprocating movement of said totalizer
wheel and restoring said pawl to its inoperative
position when said totalizer wheel is disconnected
from said counting rack.
TORD OLOF RICKARD DAHLBERG.
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