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Jan, 7, 1g47.
Filed Nov. 20, 1945
6 Sheets-Sheet 1
Jan. 7, 1947.
Filed Nov. 20, 1945
6 Sheets-Sheet 2'
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1259” .
Jan. 7, 1947..
Filed Nov. 20, 1945
e Sheets-Sheet 4
Jan. 7, 1947. _
‘ Filed ‘Nov. 20, 1945
6Shee’cs-Sheet E
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Patented Jan. 7, 1947
Luring Pickering Crosman, South Orange, N. J.,
assignor to Monroe Calculating Machine Com
pany, Orange, N. J., a corporation of Delaware
Application November 20, 1945, Serial No. 629,777
1 Claim.
(01. 235—61)
The invention relates to an improved means
for selecting and registering partial products in
multiplying machines.
fecting this result form no part of the present
invention, they have not been shown in the pres
ent application. However, in so far as the disclo
In prior decimal system machines of this type
sure of the Fleming application may be per
the graduation of the partial product plates rep~ C1. tinent as providing for an advantageous appli
resenting the units and those representing the
cation of the present invention in a complete ma
tens digits of the partial products related to a
chine, such disclosure is made of record.
given multiplier digit have consisted of series
Alternative arrangements, coming within the
of stepped faces of eight or nine steps each, with
scope of the present disclosure, will be consid
a corresponding extension of the plates in two of 10 ered more conveniently in connection with the de
their dimensions. This, together with similar
tailed description of structure.
provision for the remaining multiplier digits, and
Entering the factors
the duplication of the entire partial product
table in each denominational order of the ma
In accordance with above noted disclosure,
chine, has resulted in the employment of an as 15 amounts set up by the digit keys 2l5 (Fig. 1)
sembly of plates of considerable mass and extent.
may be transferred to an accumulator Ii 3, upon
The present invention provides means for em
operation of the machine, by means of a series
ploying a lighter, more compact plate assembly,
of differential actuators 6lii. These differential
and it consists in the novel construction and com
actuators are spring operated, and are normally
bination of parts, as set forth in the appended 20 restrained by frame Hi6. Each actuator Sill is
fulcrumed at 608, a forward arm thereof having
segmental. gear teeth for rotating an accumulator
wheel and an upper arm being pivotally connected
with a digit index bar M5. The actuators are
factor keyboard of a listing machine to which 25 normally held under restraint of a series of col
the invention has been applied.
umn latches 2 M, each latch being releasable upon
Fig. 2 is a left side elevation showing various
depression of any key 255 in the same column by
multiplication control devices.
means of a slide 2 l3. Upon operation of the ma
Fig. 3 is an enlarged left side elevation of the
chine and consequent movement of the frame 6 l 6,
factor value locking means and of certain mul
the released actuators will be rotated countertiplication control cams.
clockwise each until stopped by contact of a lug
Fig. 4 is a vertical section taken through the
of the related index bar Gilli with the stem of a
In the accompanying drawings illustrating the
Fig. 1 is a vertical section taken through the
parts lying forward of the keyboard.
Fig. 5 is a detail perspective view of a portion
of the units feeler actuating means.
Fig. 6 is an axial section through the partial
depressed key.
The multiplicancl is set up on keys 2|5, and
the partial product plates are adjusted accord
ingly during a non-add operation of the actuators
product plates.
5m. During this operation accumulator 413 is
Fig. '7 is a detail right side elevation of the par
moved out of mesh with the actuator segments,
tial product transmission means.
and a cam till (Fig. 2) is rocked by a shaft Sill,
Fig. 8 is a section taken on line 8-8, Fig. 4i. 40 to reciprocate frame Sit in known manner.
Fig. 9 is a detail plan view of the tens feelers and
The setting movements imparted to the actu
associated parts.
ators Bill during the forward stroke or cam 3H5
Fig. 10 is a series of detail elevations show
are transmitted to related stop plates 536 (Fig. 1),
ing the ?ve partial product plates.
loosely mounted upon a shaft 53'! and held in
Fig. 11 is a timing diagram illustrating the 45 contact with the actuators by springs
movements of various parts.
the end of this forward stroke the stop plates
The ?ve partial product plates herein illustrat
are locked in adjusted positions by engagement of
ed provide for the products involving the multi
a rotary bar 569 with graduated faces of said
plier digits from 1 to 5. (‘Jo-pending applica
plates. Bar 509 is rocked into locking engage
tion Serial No. 629,841, ?led ‘by Howard M. Flem
ing, of even date herewith, and entitled Mul
.tiplying machine shows means whereby these
?ve _'-plates may be used to control the registra
tion of products involving all or the multiplier
digits from» 1 to 9, but since the means for vef
ment with the stop plates 595 by contact of a
projection 5H3 (Fig. 3) of cam 3E8 with 2. lug
5| I of pivoted arm 5I2, contacting an arm 5&9’
of said bar, the locking engagement. being main
tained during thereturn stroke of the cam by en
gagement of a spring ‘latch 513 with lug 5! I. At
the end of the return stroke of the parts, latch
5E3 will be lifted by a pin 5H1 mounted in the
actuator segment 58%, in order to reduce the
number of graded steps of the partial product
cam, and bar 589 will be rocked to unlocking po
plates, with a consequent permissible reduction
of diameter.
It will be noted that this reduction of diameter
sition by a spring 5l5.
During that portion of the non-add cycle in
is further dependent, in the illustrated embodi
ment of the invention, upon the limitation of the
tens value feelers to a travel of four steps, made
which the multiplicand value is locked in the
plates 566, a series of feelers will be brought into
contact with said plates, whereby the values will
be entered in the partial product plates.
possible by the employment of the semi-comple
mental multiplier arrangement set forth in the
hereinbefore mentioned Fleming patent appli
cation. However, the same advantage would be
obtained with a complete partial product table,
For this purpose a bail 528 (Fig. 4) is rocked
clockwise, said bail lying in rear of a series of
spring impelled segments '529, loosely mounted
upon a shaft 536.
Upon release from the re
representing values from 1 to 81, since the two
straint of bail 528, the segment springs 53] will
rotate the segments clockwise until feelers 532,
pivotally connected thereto, come into contact
with studs 533 of the adjusted stop plates 506.
The segments 523 mesh with intermediate gear
members 5%, meshing in turn with gears‘ 531',
ieeler arrangementshown as applied to the units
values might be duplicated for the tens.
The settings of the two feelers are combined as
Feeler 6'i9 has pin and slot connection with the
outer end of a pivoted arm E35, mounted upon a
each rotatably connected to a series of ?ve par
tial product plates 538 (Figs. 6, '7, 10), mounted
plate 685 supported upon the auxiliary actuator
upon a sleeve supported upon a shaft ‘539. Clock
shaft 68?, arm 585 being provided with a stop lug
638 designed for contact by one of a series of
wise rotation of the related segments 529 will thus
of plates a number of steps (from one to nine)
in accordance with the multiplicand value set in
graded stop shoulders of the actuatorsegment
eat, the shoulder making contact being deter
mined by the degree of clockwise adjustment of
the corresponding stop plate 506.
the feeler. The shoulders of the segment are so
rotate the partial product plates 538, each series
spaced as to provide for 0, 3, 6, or 7 steps of move
As shown, a partial product plate is provided
ment, controlled by four evenly graded steps of
to represent the products of each multiplier digit,
and the multiplier is selected by moving the se 30 the partial product plate. Feeler 589 is provided
with a stop lug 5S8 designed for contact with one
ries of plates laterally, to bring the required
of a series of three evenly ‘graded stop shoulders
plates opposite the feelers which control the reg
of the plate 686, the shoulder making contact
istration. For this purpose, it may be noted, the
being determined by counter-clockwise adjust
intermediate gearing 534 is swung forward, out
of mesh with the gears 53?. Obviously, with a 35 ment of the feeler, controlled by three evenly
graded steps of the partial product plate. Upon
different arrangement of the values upon the
contact of the segment with stop E88 plate 688
partial product plates, a different method of mul
will be carried counter-clockwise, against the ten
tiplier selection might be employed.
sion of its spring see, so that the pivotal support
Registering the partial products
40 of arm 585 will be carried forward to allow for
0, 1 or 2 steps of movement of the actuator seg
The multiplication is effected by rotation of an
operation control shaft 56? (Figs. 2 and 3) upon
ment.v Therefore, by combining the settings for
which are mounted a series of cams which act
to determine the calculation and registration of
the partial product values.
Cam 868 (Fig. 3) operates the units value feel
ers, this being the ?rst operation effected during
additive calculations (see diagram, Fig; 11). A
spring urged cam follower 669 is rocked counter
clockwise by cam 868, said follower, through link
Elli and bell-crank lever ?ll, rocking a shaft 673.
Shaft 6'53 has link connection ?'lZ with a pair of
supported upon shaft EM (Figs. 4 and
7) and having pivotal connection 616 with a pair
of hangers Eli’ (Fig. 5) engaging perforations of :
two spaced bars 518, riveted together to form a
rigid frame. This framevhas yieldable connec
tion with the units feelers Elli, 680, there being a
pair of such feelers related to each accumulator
l or 2 steps of movement with the settings for
3, 6 or '7 steps any of the digits from 1 to 9 may
be registered.
The tens feelers 69! are operated through a
shaft 695. Keyed to shaft 695is a series of arms
596 (Figs. 4, 7, and 9) having yieldable drive con
nection by means of the transverse spring 691
with a series of stops 698, loosely mounted upon
shaft 695 and having each pin and slot con
nection with a tens feeler 69L The stops and
feelers are normally located by contact of the
stops with overlying lugs of the arms 6%. The
rear ends of stops 6%’ are designed to be con
tacted each by one of a series of ?ve graded stop
shoulders of the actuator segments 684, in ac
cordance with the contact of feelers 69! with one
of a series of ?ve graded steps of the partial
wheel unit. Each yieldable connection comprises 60 product plates (see Plate 5x, Fig. 10), to provide
for registration of the values 0, 1, 2, 3, 4, upon
a link 68!, pivotally connected with its feeler and
clockwise rotation of the segments. During these
having a slotted extremity engaging a notched
operations the vpartial product plates are held in
portion of one of the bars 618, a spring 682 bear
set position by spring detents 699 (Fig. 4) en
ing against a shoulder of the link and against
gaging the gears 537.
the bottom of the bar. Upon rocking movement
The auxiliary actuatorsegments 684 are driven
of shaft tie frame bars 678 will be depressed, and
by a pair of complemental cams ‘F20 (Fig. 3),
feelers are, 63%] will be rocked about their pivot
through cam follower ‘Hi, link ‘I22, arm ‘I23 and
58-3, each pair into contact with the selected par,
shaft 724i. Shaft 124 has yieldable drive con
tial product plate 538 of its related group, the
spring 582 yielding when such movement is in
terrupted by contact of afeelerwith the plate.
“ Two units feelers are employed ‘in each order,
and their settings are combined to provide for a
differential oneto nine step counterolockwisero
tation or the related auxiliary or multiplication
nection with a series of segments T25 (Figs. 4, 7,
8) , the connection-being effected by aseriesof U
shaped plates 126, having each spline connection
with the shaft and lugs‘upon', its opposite arms
normally engaging theopposite ends of a spring
vs 121, said spring also normally engaging lugs of
two adjacent segments ‘I25. This arrangement
provides a yieldable drive of the segments upon
rocking movement of shaft 124 in either direction
from the normal position illustrated in Figure 4.
Each segment 125 meshes with a pinion ‘I28 hav
ing ?xed connection with one of the auxiliary
actuator segments 684, so that the latter segments
will be driven against the feeler connections upon
movement of shaft 124. ‘
in the calculation of the previously noted ex
ample, 4 X 775.
The partial product plates marked 4m in Figure
10 are brought opposite the feelers 619, 680, and
Three of the partial product plate groups have
been advanced to represent the multiplicand, the
groups in the hundreds and tens orders seven
steps and the units order group five steps. In
During each calculating cycle, the accumulator 10 the hundreds order feeler 619 (Fig. e) enters two
pinions 403 will be meshed with and unmeshed
steps in contacting the plate 538, positioning the
from actuator segments 684 under control of a
lug E88 opposite the third shoulder inward from
cam 129 (Fig. 2). Cam 129 acts through cam
the periphery of segment 684, to represent the
follower 130 to rock an arm 13!, fast with one
value six. Feeler 68$ enters two steps, bringing
arm of a toggle I0 which has connection with 15 lug 689 opposite the outer shoulder of plate 686,
the accumulator shaft 412.
The successive actions effected by the calcula
and thus allowing two extra steps of counter
clockwise movement of the segment, which, add
tion controlling cams may be traced on the
ed to the six steps allowed by feelers 619, gives
diagram, Figure 11, as follows:
a total of eight steps to represent the units value
During an additive cycle of operation, cam 668 20 of the partial product 23. Feeler 69! enters two
?rst operates the units feelers to position the
steps in contacting plate 538, providing for two
stop lugs 688 and 689 (Figs. 4, 7) in accordance ‘
steps of movement of the thousands segment 684,
with the units values. Cams 120 then act to
In the tens order the feeler actions are the same,
rotate the auxiliary segments 684 counter-clock
except that the units and tens of the partial
wise, into engagement with lugs 688, in which
product are registered in the tens and hundreds
position the segments will be held while cam 129
order, so that, in the hundreds order, segment,
acts to move the accumulator pinions 403 out of
B84 is allowed eight steps of counterclockwise
mesh with the lister actuator segments BIO and
movement and, during the return or clockwise
into mesh with the auxiliary actuator segments
stroke will move eight steps to its neutral position
684 and while a cam (not shown) acts to rock < plus two steps beyond that position, giving a, reg
shaft 695 and operate the tens feelers to position
istering movement of ten steps. Finally, in the
the stops 698 in accordance with the tens values.
units order, where the partial product plates were
This is the position of the parts illustrated in
advanced ?ve steps, feelers 5'19 and 680 are held
Figure '7, the dot dash showing of segment 684, in
on the extreme outer surface of plate 538, to pro
dicating a registration of nine and the fragmen- ‘~' vide for contact of the outer shoulder of segment
tary full line showing indicating a zero. Cams
684 with lug 68B and plate 686 is held against
120 will now act to rotate the segments 684
movement, so that no counterclockwise move
clockwise to their normal position, to register the
units and beyond said position, into contact with
ment of segment 684 can occur. Feeler 69! how
ever enters two steps, so that an additional two
the stops 698 to register the tens, a maximum of 40 step movement of the tens order segment 538 is
thirteen steps of movement. Cam 568 will now
retract the units feelers and cams 120 will un
mesh the accumulator pinions from segments 684
and mesh them again with the lister actuator
segments 6H], during which time the segments
684 will be held stationary. Cams 120 will next
return the auxiliary actuator segments 684120
and slightly beyond their normal position, to
afford clearance with the tens stops 698, which
provided for, representing the partial product 20.
Thus during the calculating cycle, the four right
hand segments 538 will register the values 2800,
280 and 20, which will be accumulated as 3100.
I claim:
In a multiplying machine having an actuator
segment and a selectively settable partial product
plate provided with two series of graded stop
faces; a member settable to variably limit the
extent of movement of the actuator segment, tWo
are then restored by their cam. Finally, ‘the
segments 684 are moved through the true neu
tral position into their normal position of rest,
in which clearance is provided with the units
lected stop face of its related series, and differ
ential connections between the feelers and the
lugs 688.
settable member designed to transmit adjustable
The operation of the partial product calcula
ting mechanism above described may be illus
trated by following through the actions involved
feelers each adjustable into contact with a se
movement of one or alternatively of both said
feelers to variably set said member in accordance
with the setting of the partial product plate.
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