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Патент USA US3030028

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April 17, 1962
e. c. ELLERBECK
3,030,018
CALCULATING MACHINE CYCLE INITIATING MECHANISM
Filed May 29, 1959
TIE! __l_
3 Sheets-Sheet 1
April 17, 1962
G. c. ELLER-BECK
3,030,018
CALCULATING MACHINE CYCLE INITIATING MECHANISM
Filed May 29, 1959
5
3 Sheets-Sheet 2
United States PatentO
iCC
3,030,018
Patented Apr. 17, 1962,
2
1
3,030,018
CALCULATING MACHINE CYCLE INITIATING
MECHANISM
Grant C. Ellerbeck, San Leandro, Calif., assignor to
Friden, Inc., a corporation of California
Filed May 29, 1959, Ser. No. 816,749
7 Claims. (Cl. 235—145)
and ?xedly mounted on, longitudinally extending machine
frames 12 and 13. These frame plates conventionally are
mounted substantially perpendicularly from the machine
base 14 by suitable fastening means, not shown, and are
in spaced parallel relationship to each other. The key
supporting structure includes a top plate 16 and a bottom
'plate 17 disposed in spaced parallel relationship to each
other above the machine base. The bottom plate 17 is
This invention relates to automatic calculating ma
positioned between, and secured to, the side frames 12
chines, and more particularly to a ten-key, live keyboard 10 ‘and 13. The top plate 16 is ?xed above the bottom
for adding machines of the type disclosed in U.S. Patent
plate 17 by suitable posts 21 ?xed therebetween. The key
No. 2,832,531 of April 29, 1958, to Harold J. Chall.
supporting structure further includes a central support 18
It is a primary object of the present invention to pro
(see FIG. 2), which is secured to the bottom plate 17 in
vide an improved ten-key live keyboard for an automatic
any suitable manner, such as by welding, and to the ma
adding machine, by which is meant a keyboard in which 15 chine base 14 by suitable fasteners, such as screw 19. The
the value keys also function to initiate a machine opera
top plate 16 and bottom plate 17 are suitably apertured to
tion so that the operation of a separate control key be
slidably receive the stems 22 of the selection, or value
setting, keys 23.
comes unnecessary.
It is a more speci?c object of the present invention to
Each value setting key 23 has a key stem 22 of rec
provide an improved live keyboard for a ten-key machine 20 tangular cross-sectional shape, suitably received in corre
wherein a rocking movement, or tilting, of the key initiates
sponding registering apertures in the upper and lower
a machine function.
supporting plates 16 and 17, respectively. The keys 23
A further object of this invention is to provide a live
are arranged in a rectangular pattern, with the keys con
' keyboard wherein rocking of a depressed value key will
secutively numbered from “1” to “9” being arranged in
initiate a machine operation.
25 three rows of three keys in each row (as shown by the
Still another object of the invention is to provide a
numeral designations above the key stems in FIG. 1),
live ten-key keyboard requiring very light pres-sure to
and with the “0” key mounted on a pair of keystems
longitudinally move, or rock, the value key and thereby
initiate machine operation.
positioned forwardly of the “1,” “2” and “3” value keys.
Laterally offset arms 26 extend across the longitudinal
.Still a further object is to provide a ten-key keyboard 30 center line of the keyboard, each arm having a down
wherein the value keys may be rocked (after depression
wardly directed plunger portion extending through an
other aperture in the bottom plate 17. These plunger
apertures in the bottom plate are arranged substantially
control switches which initiate machine operation.
in a line extending longitudinally of the keyboard inter
‘Further objects and'advantages will become apparent 35 mediate the width thereof, as is fully shown in the Friden
vfrom the following description of a preferred embodi
and Chall patents above-mentioned. Each key stem 22
ment of the present invention, which will readily be under
also has a restricted stem portion extending through the
stood from the following description and the accompany
aperture in the lower plate 17. A compression spring 27
to set a value in the machine), in either of two directions,
thereby closing one or the other of a pair of electric
ing drawings in which:
‘
'
encircles each such restricted key stem 22 and rests on
FIG. 1 is a partial plan view of the keyboard and 40 the bottom plates 17, so that these springs resiliently urge
the keys upwardly to a limiting position, as determined
selector sectors, with the key tops removed, the view
being substantially parallel to the plane of the keyboard,
by the engagement of the top edge of the offset arm 26
as generally indicated by the line 1—1 of FIG. 2;
with the bottom surface of the upper key support plate 16.
FIG. 2 is a cross-sectional elevational view of the key- The key tops of the keys are not secured directly to the
board and further shows the pin box associated therewith, 45 key stems 22, as is conventional, but are secured to rock
the view being taken along planes immediately to the
able levers 31 pivotally and slidably mounted intermedi
right of the keyboard, as indicated by the lines 2--2 of
ate their length on a rod, or shaft, 32. These levers 31
FIG. 1;
are mounted on the shaft 32 by means of a slot 30, so
FIG. 3 is a right side elevational'view showing the
that they can be rocked about the shaft, or rod, 32, and
cycle initiating mechanism, as indicated by the line 3—3 50 also can be moved longitudinally of the machine on the of FIG. 1;
shaft. The upper surface of each key top is slightly con
FIG. 4 is ‘a fragmentary view of the power switch and
cave to readily receive the ?nger tips of an operator,
the switch closure mechanism, the view being taken along
thereby providing a surface whereby the operator can
the planes indicated by lines 4-4 of FIG. 3; and,
longitudinally move a depressed key, in either of two
FIG. 5 is a schematic wiring diagram employed in the 55 different directions and preferably as described herein
present invention.
forwardly or rearwardly, to initiate a machine operation,
The invention herein shown and described is preferably
‘as hereinafter described. The rearward extremity of each
constructed in an adding machine of the type shown in
lever 31 (to the right in FIG. 2) is provided with a slot 33
the above-mentioned Chall patent. It is not intended that
which cooperates with a pin 34 extending transversely
its use should be limited only to a machine of this type. 60 from the upper end of the key stem 22. It, therefore,
It is evident that the underlying principles thereof may be
can be seen that downward depression of the keys 23 '
advantageously applied to other types of machines, e.g.,
will move the appropriate key stem 22 downwardly and
the ten-key keyboard found in the Carl M. F. Friden
that the elongated slot 33 will allow limited forward and
Patent No. 2,731,752, patented March 20, 1945.
rearward movement of the key tops 23 and levers 31 with
Mechanisms which are conventional in the machine of
respect to the key stem 22 (see FIG. 2). A T-shaped slot
the above-mentioned Patent No. 2,832,531 will not be
35 is provided in the forward extremity of the position
described herein, unless necessary to provide a complete
, able levers, or arms, 31. The T-shaped slots 35 encom
understanding of the mechanism in the present invention.
pass a cross-member, or rod, 36, of a bail extending trans
Referring now to the preferred embodiment shown in
versely of the machine. This rod is mounted in the upper
FIGS. 1, 2 and 3 and more speci?cally to FIG. 2, the add 70 end of a pair of upstanding rockable arms 37 and 38,
ing machine is provided with a keyboard assembly 11,
including a key supporting structure disposed between,
which arms preferably are pinned to a transverse shaft 39
‘extending between the frame plates 12 and 13 and suitably
8,030,018
4
3
journalled therein. It, therefore, can be seen that upon
depression of any of the value keys 23, the rockable
lever 31 will rock about its pivot 32 and the downward
extending stem of the T-shaped, slot 35 will engage the
There is one settable stop pin for each numeral designa
tion of “1” to “8” of each selector 54, a ?xed stop being
provided for the “9” position, and the latch 59 holding
the sector in its "0” position. A resilient limit stop 70 is
secured between the side plates 46 and 47 and provides
bail rod 36 as the forward end of the lever 31 is raised.
Also, if the key is moved forwardly or rearwardly, it will
a home, or "0” position for the selector sectors by the
adjust the rod 36 correspondingly, about the shaft 39. The
engagement‘ of one of the radially positioned spokes of
forward and rearward movement of-the ‘rod 36 will ini
the selectors engaging a bottom portion of the stop 70.
The stop 70 also provides a limit stop for the selector
tiate a, functional operation of the machine, as will later
be described. A U-shaped centralizing spring 40 is pro 10 sectors when in the other limiting position, that is, when
vided for each rockable lever 31, rearwardly of the pivot
the selector sectors are rotated to the “9” position. It is
rod 32, the springs preferably being secured to an exten
conventional in machines of this type to have another
radially disposed spoke engage the resilient stop 70 when
sion of the top plate 16 by suitable fasteners, such as
._
the value of “9” is selected in the keyboard and the sec
A selector assembly 45 is provided, and includes a 15 tors 54 are unlatched to rotate about their pivotal shaft 53.
cage, or carriage, having side plates 46 and 47 extending
An ‘arbor 74 is mounted on the right and left side
longitudinally of the machine, substantially perpendicular
frames 12 and 13, respectively, and extends transversely
to the plane of the machine base and held in suitable ' thereof below the bottom plate 17. Pin setting bellcranks
parallel relationship to each other by spaced tie rods 48.
75, corresponding to the “1” and “8” keys of the key
49 and 50, extending transversely through the cage and
board, are pivotally mounted intermediate their lengths
secured in the side plates 46 and 47. The side plates 46
on the arbor 74 in side~by-side relationship to each other. .
~ and 47, respectively, are slidably mounted on parallel
The bellcrank levers 75 have upwardly curved front ends
guide rails 51 and 52 which extend transversely of the
so positioned below the bottom plate 17 that they ‘are in‘
machine and through apertures in the side plates. The
alignment with the lower ends of corresponding plunger ‘
length of the guide rails is such that the selector unit, or 25 portions of the numeral key stems 22, whereby the manual
depression of any numeral key 23 will impart a rocking
carriage, has a freedom of translational movement sub
stantially equal to its own length transversely of the ma
movement to its corresponding pin setting bellcrank 75.
chine. The side plates 46 and 47 support a sector mounting
Reai-wardly of the arbor 74, the bellcrank levers 75 are
shaft 53 which extends transversely across the space be
laterally oifset so that their rearward end portions are
tween them and is substantially parallel to the tie rods 48, 30 suitably received, one above the other, in a slot provided
49, and 50. A plurality of ordinarily arranged input value
in’ a ?xed plate 76. The plate 76 extends transversely ‘of .
selector sectors 54 are jonrnalled on the shaft 53. A live
the machine, being disposed immediately in front of the '
lower pin guide plate 67. The pin setting levers 75 are
pawl 58 is pivotally mounted atone end thereof on a
radially projecting spoke of each selector sector 54, which
so constructed and arranged that the lever operated by the
pawl bears adjacent its other end against the distal end 35 “1” key 23 has its rearward end at the lowest position in
of the coordinal selector sector. Each live pawl 58 is
the slot which is provided in the plate 76, the lever oper
resiliently held against the adjacent end of the correspond
ated by the “2” key has its rearward end next above the‘
rearward end of the leveroperated by the "1” key, etc.
ing sector by a tension spring 57 connected between the
live pawl and the spoke structure of’ the sector.
This arrangement continues, as is conventional, through
Each selector sector 54 is releasably held in its full— 40 the “8” key, which lever has its rearward end at the high
cycle, or home position by a coordinal latch lever 59
est position in the slot. Each of the levers 75 has its
rearward projection in alignment with the forward end
pivotally mounted intermediate its length on a latch shaft
' 60, which shaft extends between the carriage side plates
of a corresponding stop pin 69 in the ordinal row of pins
screws 41.
46 and 47 and is secured at its ends thereto. The latch
lying in the pin-setting position of the carriage, i.e., the
lever 59 is resiliently urged by a tension spring 61 to its 45 highest ordinal row when the carriage is in its home, or
latching position in which its rearward end engages the
inoperative position. Thus, when a numeral value key is
forwardly projecting nose on the free end of the pawl 58,
manually depressed, a corresponding stop pin will ‘be set,
the spring 61 preferably being tensioned betweenthe for ' as is conventional in this type of machine, and the car
riage will he stepped one order to the left to receive
ward end of the latch 59 and the tie rod 50. Each of the
selector sectors is urged to turn about the shaft 53 '(‘clock-, 50 another value.
'
wise in FIG. 2) by a tension spring 62~which is wound
An L-shaped bracket 77 is secured by suitable means
partly around a hub of the sectors and ‘has one end
to the central support 18 forwardly of the ?xed plate 76
connected to a sector carried stud 63 and its other end
and below the arbor 74. The pin-setting levers 75 have a
nose formation forwardly thereof, which formations abut
In addition to the ‘side plates 46 and 47 and the tie rods 55 against the. rearward surface of one leg of the L-shaped
48 to 50, inclusive, the selector assembly 45 includes a pin
bracket 77, so that positive positioning of the levers in‘
box 66 (FIG. 2). ' The pin box 66 has forward and rear
their normal, inactive position is maintained. ‘A tension
connected to the tie rod 49.
i
ward guide plates 67 and 68, respectively, disposed in
spaced and substantially parallel relationship to each
spring 78 is connected between an ear formation on each
lever 75 and the downwardly projecting leg of the L
other at the front side of the selector carriage '45 and is 60 shaped bracket 77 to resiliently urge the levers to their
secured between the end plates thereof. Both plates» 67
normal inactive position.
and 68 are provided with a series of registering apertures
A sector latch-releasing bar’ 81 extends longitudinally
extending transversely thereof in ordinal rows aligned
of the keyboard between the top and bottom plates 16
and 17, respectively, of the keyboard assembly, and under
with the coordinal sector 54. Each row has eight aper
tures differentially spaced, corresponding to values of “1” 65 the offset arms 26 of the key stems 22. This bar 81 is
supported at its ends by support arms 82, which arms are
to “8.” A settable stop pin 69 is suitably mounted in each
pivotally secured at their extreme ends to a longitudinally
pair of registering apertures. ‘Each stop pin 69 carries
extending shaft journalled ‘in the keyboard ‘assembly 11.
conventional limit pins (not shown) extending trans
The support arms 82 are‘so constructed and arranged
versely therethrough, which limit pins are engageable
respectively with the plates 67 and 68 to limit longitudinal 70 that thebar 81 can move downwardly under pressure of
the manually depressed keys and can be spring-returned
movement of the stop pins relative to the supporting
plates in their proper retracted and protracted positions.
to its normal position, as is conventional‘in machines of
A conventional spring de'tent 72 may also be engaged with
this type and as fully described in the above-mentioned‘
patents.
each of the stop pins 69 to releasably hold the associated
stop pin in- either of its retracted or protracted positions. 75 A bellcrank lever 83 is' pivotedv intermediate its length
3,080,018 -
5
6
on aipin 86 carried by the upper end of an arm 84, which
arm is secured to the bracket 77 by suitable fasteners, such
as screws 85. The bellcrank lever 83 has its forward leg
curved ‘upwardly to extend through an aperture in the
bottom keyboard plate 17 directly below the bar 81, so
that the lever 83 will be rocked whenever the bar 81 is
a forwardly extending pin 103 (see FIG. 2) which pin
underlies the rearward support arm 82 of the centrally
located latch release bar 81. Therefore, when the bar
81 is pressed ‘down by the depression of a numeral value
key 23, as described above, the support arm 82 engages
the pin 103 and forces the free end of the escapement
pressed down by depression of any of the numeral keys.
arm 97 downwardly. The retarding pawl 99 is provided
A latch releasing dog 88 is pivotally mounted at its
near its free end with a closed slot, not shown, having at
forward end on the central support 18, forwardly of the
its end nearest the free end of this pawl, a downwardly
?xed plate 76. The releasing dog 88 has at its rearward 10' extending recess. A terminal extension of the release
end a nose formation 89 which extends through an aper
bar 81 which projects rearwardly from the rearward
ture in the ?xed plate '76 and underlies the forward end
support arm 82 is received in this recess, so that as the
of the sector latch lever 59 lying in the pin setting posi
sector latch release bar 81 is moved downwardly, the
tion of the carriage, in a conventional manner. A link
extension thereof resting in the elongated recess will
90 is pivotally connected at its lower end to the dog 88 15 move the retarding pawl 99 ‘downwardly, and thus move
intermediate the length of the dog, and pivotally con
the inclined ear 101 into the nearest interdental space
nected at its upper end to the rearward leg of the bell
of the rack comb 95. Since the inclined car 101 has a
crank lever 83. Therefore, it can be seen that when the
thickness less than the distance between two adjacent
lever 83 is rocked (counter-clockwise in FIG. 2) by
teeth 96 of the comb 95, it will permit a sufficient move
downward movement of the bar 81, the forward end of 20 ment of the rack to the left (see FIG. 1) to bring a tooth
the sector latch lever 59 which is engaged by the nose 89
of the rack, or comb, above the detent 98 on the escape
of latch releasing dog 88 is raised against the force of
ment arm 97. When the manually depressed numeral
its associated tension spring 61, whereby the rearward
key is released, allowing the spring 102 to restore the
end of the latch lever 59 is moved out of engagement
arm 97 and pawl 99, the inclined ear 101 will be moved
with the coordinal selector sector 54. Thereupon the 25 out of the interdental space in which it is engaged, and
coordinal sector rotates under the force of its spring 62
also, the detent 98 will ?rst contact the bottom surface
to the differential position determined by the projection
of the tooth which is immediately above it, and then as
of a stop pin 69 into its path of travel.
the rack 95 shifts to the left, it is set into the next space
It can be noted at‘this time that as the selector seg
to the right and terminates the leftward movement of the
ments are set, the shiftable selector unit 45, including 30 shiftable carriage. Thus, the selector mechanism will
the cage and the selector sectors, stop pins and latch
then have been shifted one ordinal space and the selec?
levers carried by the cage, is stepped, or shifted, along
tion mechanism is ready to receive another digital value.
the guide rails 51 and 52 in a direction from right to
A zero shaft 104 (FIG. 2) is journalled near its ends
left in FIG. 1, so that the selector sectors are successively
in the upstanding brackets 106 provided on the forward‘
brought into alignment with the slots in the ?xed plate 35 and rearward edges of the bottom plate v17. The rear
76 as the digits of an entire number are registered from
ward end of the shaft 104 is secured to the retarding
the highest to the lowest order of the entry by depres
sion of the appropriate numeral keys 23.
A rack, or comb 95, is mounted on the upper and for
pawl 99 and provides the pivot therefor. The forward
end of the shaft 104 has secured thereto a lever 107,
which extends from the shaft to underlie a ?nger 108
ward edge of the selector carriage 45, as by being at 40 provided on the key stem 22 of the “0” value key 23.v
tached to the rearward guide pin plate 68 by suitable
Thus as the “0” key is depressed, which key does not set
screw fasteners. The rack 95 has forwardly directed
any of the pins in the pin box 66, the ?nger 108 will
teeth 96 thereon (see FIG. 1). An escapement arm 97
rock the lever 107 downwardly to rock the shaft 104v
is pivotally mounted at its left end on the left side of the
which is secured thereto (counter-clockwise if viewed
bottom plate !17 of the keyboardassembly (as shown in 45 from the front). As the shaft 104 is rocked it will move
FIG. 1). The escapement arm 97 extends to the right
the free end of the retarding pawl 99 downwardly. As
from its pivot, along and below the rack 95. This arm
the free end of the pawl 99 is moved downwardly the
97 is provided on its right, or free, end with a detent
formation 98 which projects upwardly between two adja
lower surface of the inclined ear 101 will engage the
upper edge of the escapement arm 97 to force this arm
cent teeth 96 of the rack 95 and releasably restrains the 50 downwardly. Once again the detent 98 is removed from
sector unit against movement. A conventional rack
the teeth 96 and the inclined ear 101 moves into the next
retarding pawl 99 is rigidly mounted at its right end on
interdental space of the rack, or comb, 95, whereby the
the rear end of a shaft 104 pivoted in brackets 106 at the
selector assembly 45 is shifted one increment to the left
ends adjacent the right side of the bottom plate 17 and
(see FIG. 1).
extends from its shaft to the left along and forwardly 55
When the shiftable selector unit is returned to its home
of the rack 95. The conventional retarding pawl 99 is
position by conventional mechanism, not shown, any of
provided at its left, or free, end with an inclined ear 101
the settable stop pins 69 which have been projected dur
which is normally disposed above the rack 95. Also,
ing the leftward movement of the unit from its home
conventionally,‘ the two pawls are rocked by a common
position are automatically retracted. Each stop pin 69
means ‘described in the next paragraph, so that both pawls 60 is provided at its forward, or lower, end, forwardly of
rock in unison. Thus, the ear ‘101 of pawl 99 is mov
the lower guide pin plate 67, with elongated slots. A
able into an interdent-al space of the rack when the nose
comb, not shown, is conventionally mounted on the
frame plate 13, the pin retracting ?ngers, or teeth 71, of
98 of pawl 97 starts its movement to disengage the rack,
whereby the selector unit is stepped to the left only a
which extend to the left through these slots. There is
small portion of an ordinal step upon the depression of 65 one retracting ?nger for each bank, or transverse row,
each pin 71 extending through the slots of all the pins 69
a value key 23, and is held in such intermediate position
until the key is released. The escapement arm and re
of its bank when the carriage is in its extreme righthand
tarding pawl 96 and 99,’ respectively, are provided at
position (which conventionally is one step to the right of
their pivotal ends with downwardly projecting extensions,
its home position). Thus a leftward movement of the
between which a tension spring 102 is connected to resil 70
carriage 45 to the left from its extreme to its home
ientlyurge the free ends of the arm 97 and pawl 99 up
position. (in ‘which the highest order of the pins and sec
wardly, whereby the detent formation 98 is positioned
tors are aligned with the slot in plate 76) moves the high
in an interdental space of the rack 95.
est order of pins off the teeth 71 of the comb to enable
The escapement arm 97 is provided at its freeend with 75 the pins to be set. Similarly, each leftward step frees the
meson-1:81
7
8.
adjacent lower order of pins from the comb. Each ?nger
I‘ 127, by a pivot screw 137, to the plate 126. The block
has a point at its left-hand end which is in alignment with
the small opening of the slot when a pin is in its pro
is resiliently urged upwardly (clockwise in FIG. 3') by‘
jected position, adjacent to which is a cam surface which
restores the settable pins of the corresponding rows to
their retracted position as the pins move to the right as
the carriage is returned to its right-hand position. The
a spring 138 which is secured between a leg of the block
135 and a stud 139‘ secured to the plate 126. The block
135 normally is restrained from its upward movement
by a pin 141, which pin is secured to the link 127 imme
diately above the block-when the link is in its neutral, or
inactive, position. When the lever 127 is adjusted for
foregoing pin-retracting mechanism is conventional and
wardly by the forward movement of a depressed value
a complete description thereof can be found in the
10 key 23, as explained earlier, the pin 141 moves off of the
Carl M. F. Friden Patent No. 2,371,752.
block, thereby permitting the block 135 to rotate upward
The foregoing description of the conventional sector
ly about its pivot 137 to move behind the pin 141 and
assembly 45 and its associated mechanism is believed suf~
latch the slidable member 127 in its forward adjusted po
?cient for a complete understanding of the present inven
sition.
tion hereinafter described. If a more detailed descrip
Similarly, the minus block 136 moves upwardly (coun
tion is desired of the operation and construction of this 15
terclockwise in FIG. 3) about a pivot screw 142, which
mechanism, reference may be had to either of the above
screw is secured to the plate 126 below the member 127.
mentioned patents.
The block 136 is resiliently urged ‘upwardly by a spring
To initiate either an additive or subtractive operation
143 connected between a leg of the block and a stud 144
of the machine, addition and subtraction keys 115 and
secured to the plate 126. This block 136, also, is nor
116, respectively, are located at the right-hand side of
mally restrained from upward movement by a pin 146
the keyboard assembly (FIG. 1), preferably being mount
which is secured to the adjustable link 127 immediately
ed for vertical movement on the right-hand side frame
above the block when the link is in its neutral, or inactive,
13'. The add key 115 is positioned near the forward,
position. The pin 146 also acts to latch the link 127 in
right-hand corner of the adding machine and comprises,
conventionally, an elongated ?at key stem 117 disposed 25 its rearward adjusted position when the link has been
moved rearwardly by rearward manipulation of the value
against the left-hand side of the frame 13. Convention
key 123, as explained above. The block 136 can then
ally, the stem’ 117 (see FIG. 3) is resiliently’ urged to
move upwardly, in front of the pin 146, to prevent the
its upper limiting position by a spring (not shown), which
return of this link to its neutral position.
spring is connected between the lower portion of the key
To initiate an additive or a subtractive power cycle of
stem and the upper portion of the frame 13. A stud 118.
operation of the machine automatically and to produce
projects laterally from the addition key stern 117, which
stud operates a conventional mechanism to close a motor
the same effect as would otherwise be obtained by man
switch and operate the clutch, as is fully described in the
Chall patent mentioned above. The stud 118‘, in the
present invention, is connected at its outer extremity
ual depression of the control keys 115 and 116, there is
provided the add solenoid 147 and the subtract solenoid
148. The add solenoid 147 is transversely aligned with
the add key stem 117 and is mounted on the outside of
to an armature 149 of an addition solenoid 147, the op
' e'ration of‘which will be described hereinafter.
'
the auxiliary mounting plate 126 by a U-shaped clip 150,
which clip is secured to the auxiliary plate by suitable
The subtraction key 116 is disposed immediately rear
screw fasteners, as shown in FIG. 3. Similarly, the sub
wardly of the addition key 115 and has an elongated, ?at
tract solenoid 148 is transversely aligned with the subtract
stern 119 disposed against the outer side of the frame 13.
key stem 119, and is also mounted on the outside of the
Conventionally, the subtraction key stem 119 is construct
mounting plate 126 by a U-shaped clip 150', which clip
ed for vertical sliding movement and is resiliently urged
is also secured to the plate 126 by screw fasteners as
to its upper limiting position by means of a spring (not
shown. The plunger 149 extends through the add so
shown) secured between the lower portion of the key
stem 119 and the upper portion of the frame 13. A stud 45 lenoid 147 and has its lower end connected to the stud
118 of the add key 115, as mentioned earlier. When this
120 projects laterally from the key stem 119, which
solenoid 147 is energized through a circuit described
stud 120 operates conventional mechanism to subtrac
herein, the plunger 149 will force the stud 118 and the
tively' operate the machine. The stud 120, in the present
add key 115 downwardly, thereby initiating mechanism
invention, is connected at its outer extremity to an arma
to additively cycle the machine. Secured to the upper
ture 153- of a subtraction solenoid 148, which will herein
end of the plunger 149‘ is a ?at disk 151 which cooperates,
after he described.
when the plunger moves downwardly, with an ear 152
As stated earlier, forward or rearward manipulation
formed on the lower portion of the plus block 135.
of a depressed value key will operate the machine for
Thus, as the plunger moves downwardly, it will restore this
either an additive or subtractive operation. Obviously,
when the forward end of the rockable arm 31 is moved 55 block 135 to its normal inactive position. It should be
mentioned at this time that when the block 135 is re
upwardly, the stem of the T-slot 35 will engage the bail
moved from behind the forwardly adjusted pin 141 the
rod 36, and forward or rearward manipulation of the
slidable member 127 will return to its normally inactive,
arm 31 will rock the rod 36 accordingly about its pivot
or neutral, position. The other pin 146 which cooper
shaft 39. The rod 36 extends transversely (to the right
in FIG. 1) through a slotted opening 125 in an auxiliary 60 ates with the minus block 136, will cam this block down
wardly, where the pin will once again rest above the edge
mounting plate 126.
portion of this block 136, as shown in FIG. 3.
A member, or link, 127 (see also FIG. 3) is slidably
The plunger 153 extends through the subtract solenoid
mounted on the upper portion of the plate 126 by pin
148, the lower end of which is secured to the stud 120,
and-slot connections 128 and 129. The forward end of
the link 127 is connected to the extremity of the rod 36 65 as mentioned earlier. Therefore, it is obvious that when
the solenoid 148 is energized, by circuit later to be de
and its other end is bent downwardly and has an inverted
scribed, the plunger 153 is forced downwardly, to move
V-notch 130 cut therein. Intermediate the end of the
link 127 is a resilient contact 131 of a plus-minus control
switch 132. ~The resilient contact 131 is insulated from
the subtraction key 116 downwardly to initiate a subtrac- .
The plus'block' 135 is pivotally connected below the link
in its rearward position by the minus‘ block 136 rising in
tive operation of the machine. The upper end of this
the link 127 by an insulating strip 133 positioned between 70 plunger 153 is provided with a disk 154 secured thereto.
The disk 154, when moved downwardly, engages with an
the resilient contact and the link.
ear 156 provided on the lower portion of the minus block
To provide a means by which the adjustable link 127
136, and returns this block to its normal, inactive posi
may be blocked, or latched, in its adjusted position, there
is provided a plus block 135 and a minus block 136.
tion. Since the adjustable member 127 had been latched
r
3,030,018 »,
10
front of pin 146, the rocking of the minus block by the
plunger will release the pin 146 to allow the return of
the member 127 to its normal, inactive position. It
should also be mentioned here that the pin 141 will cam
the add block 135 downwardly and the pin 141 will come
to rest above the upper portion of this block 135, as shown
in FIG. 3.
A bellcrank 158 is pivotally mounted on a stud 159.
1.2L.
pin 141 to latch the link 127 in its adjusted position. The
movement of the link 127 will also rock the bellcrank
158 and arm 168 to rock the shaft 167 and pawl 172, as
described above. Release of the depressed key will re
move the inclined ear 101 from the rack 95 and at the
same time the detent 98 will ?rst engage the bottom of
the adjacent tooth ‘96, and, as the carriage shifts, the detent
will move into the next adjacent notch of the rack 95 to
a?ixed to the upper rearward portion of the right side
terminate the shifting of the sector assembly 45. With
frame plate 13. A roller 160 is carried on the forwardly 10 the last two-thirds incremental movement of the sector
extending arm of the bell-crank 158, which roller rides in
assembly 45, the adjacent selector sector will engage the
the V-notch 130 of the shiftable link 127. The other arm
pawl 172 to axially move the shaft 167, to the left in
of the bellcrank 158 extends downwardly from the pivot
FIGS. 1 and 4.
159 and has an inverted V-notch 161 cut in its end. A
With the axial movement of the shaft 167, an insulating
spring 162 is connected between a stud 163 secured to the 15 bumper 173 which is secured to the hub of the arm 168
rearward portion of the auxiliary mounting plate 126
and extends downwardly therefrom, will ?rst engage and
and a spring seat 164 in the lower portion of the bellcrank
then close the contacts 174 and 175 of a main power
158, thus resiliently biasing the bellcrank to the central
switch 176. These contacts 174 and 175 operate to close
position shown in full lines in FIG. 3.
a circuit to the solenoids 147 or 148, as will hereinafter be
A transverse shaft 167 is journalled in the left and 20 described. A compression spring 179 (see FIGS. 1 and
right side frame plates ‘12 and 13, respectively, below the
4) surrounds the shaft 167 outwardly of the plate 13.
sector assembly 45 and rearwardly of the pin box 66-.
The spring 179 is disposed between the plate 13 and a
The transverse shaft 167 extends to the right beyond the
collar 180 which is pinned to the shaft 167. A limiting,
frame plate 13, as shown in FIG. 1. An arm 168 is
or stop, collar 181 also is pinned to the shaft 167, to limit
pinned to the extreme right end of this shaft 167, in a 25 the right-hand movement exerted by the expansion spring
plane adjacent that of bellcrank 158. A roller 169 is
‘179 to the shaft 167. The main power switch 176 is se
carried by the distal end of the arm 168, the roller riding
cured by suitable fasteners, such as screws 182, to an car
in the inverted V-notch 161 of the bellcrank 158. There
183, which car 183 is secured to the lower rearward por
fore it can be seen that when the adjustable lever 127 is
tion of the right side frame plate 13 in any suitable
moved either forwardly or rearwardly (to the right or
manner.
left in FIG. 3), the notch 130 engaging the roller 160
From the above description it can be seen that a prime
will rock the bellcrank 158 (counter-clockwise in FIG. 3)
advantage of the present invention is achieved, i.e., the
to the phantom line position shown. The notch 161 in
functional cycle of machine operation is delayed until the
the lower end of the bellcrank engages the roller 169 of
sector carriage has shifted into its proper ordinal position.
the arm 168, thereby rocking the transverse shaft 167 35 With the selector carriage having been shifted to its proper
(clockwise in FIG. 3).
ordinal position, the main power switch 176 will be closed
A switch-operating pawl 172 (see FIGS. 1, 2 and 4) is
and the control switch 132 in series therewith will be
pinned to the transverse shaft 167, a partial increment
selectively closed with either the add or subtract solenoids
of shiftable movement to the left of the sector assembly
147 and 148, respectively, to complete a circuit to energize
45. The pawl 172 is normally positioned below and out 40 either of these two solenoids.
of engagement by the selector sectors 54, as is best shown
Referring now to the schematic diagram of FIG. 5,‘
in FIG. 2. Whenever the shaft 167 is rocked (clockwise
there is shown a positive potential bus 186 and a negative‘
in FIGS. 2 and 3), the pawl 172 will be rocked into the
potential bus 187. A live wire 188 is connected to the
position shown in phantom in FIG. 2 in which position it
positive bus 186 with the other end of the live wire con
will be engaged by any of the selector sectors 54 when the' 45 nected to a terminal 189 of the power switch 176. A
selector assembly 45 is shifted along the guide rails 51
conductor 191 has one end connected to the other ter-‘
and 52. It will be recalled that depression of a value key
minal 192 of power switch 176, and the other end is con
23 operates an escapement mechanism which releases the
nected to the insulated movable contact 131 of the control
selector assembly for a partial shifting movement, the
switch 132. The control switch 132 is provided with two
major portion of the escapement movement occurring 50 selection contacts, e.g., a plus contact 193 and a minus:
after the key has been released. If the key is moved for
contact 194.
wardly or rearwardly at the end of its downward stroke,
A conductor 196 is connected to the terminal 197 of the
the consequent rocking of shaft 167 and its arm 172 moves
plus contact 193, and the other end of this conductor is
the arm into an angular position at which it will be
connected to the add solenoid 147. Similarly, a con
engaged by the adjacent sector as the carriage completes 55 ductor 198 is connected to the terminal 1990f the minus
its escapement after the key is released, thereby shifting
contact 194, with its other end connected to the subtraction
shaft 167 to the left to initiate machine operation.
solenoid 148. A common conductor 201 is connected
Depression of a value key 23 will not only rock the
between the add and the subtract solenoids 148 and 149,
arm 31, and operate the escapement mechanism, but will
respectively, and is bisected by a conductor 202, the other
operate the power cycle initiating mechanism, including
end of which is connected to the negative bus 187.
the rod 36, link 127, bellcrank 158, arm 168, shaft 167,
In operation, and referring generally to FIG. 5, with the
and pawl 172 as follows: The offset arm 26 will move
link 127 moved forwardly (in the additive selective direc—
the latch release bar 81 downwardly to remove the detent
tion), the normally open movable contact 131 will close
98 from engagement with the rack teeth 96. At the same
instance, the inclined car 101 will move downwardly into 65 with contact 193 of the control switch 132. With the
carriage being escaped to its full shifted movement, the
engagement with the adjacent tooth 96 to allow a one
insulated bumper ‘173 of the shaft 167 will close the con
third increment of movement to the carriage, as described
tacts 174 and 175 of the main power switch 176. There
above. While the key is held depressed the rod 36 is
fore, current will ?ow through the live conductor 188,
held in the stem of the T-shaped notch 35. If, at this
point, the key is moved either forwardly or rearwardly, 70 contacts 174 and 175, through the conductor 191, mova
ble contact ‘131, contact 193 of the control switch 132,
the bail rod 36 will have to rock about its pivot 39.
Assuming that an addition operation is desired and the
conductor 196 to the add solenoid 147, through the sole
key is pulled forwardly, forward movement of the rod 36
noid 147, through the common conductor 201, conductor
will adjust the slidable link 127 forwardly to a position
202 to the negative bus 187. This circuit will energize the
where the plus block 135 moves upwardly and behind the 75 add solenoid v147 whereby the plunger 149 will move‘
sheep-1s
1l
downwardly to depress the add key 115 and initiate an
additive machine cycle, as explained above.
With the link 127 moved or adjusted rearwardly (in
the subtractive direction), the normally open movable
contact 131 will close with the contact 194 of the control
switch 132. Again, as the carriage is shifted, the shaft
167 will be axially moved and the bumper 173 secured
tiate an operation of said ?rst electromagnetic means and‘
operable in another direction by said member to initiate
an operation of, ‘said second electromagnetic means, a
power circuit for both of said electromagnetic means in
cluding a normally open switch, and means operated by
said escapement mechanism for closing said switch.
3. In a calculating machine having a ten-key keyboard
thereto will close the contacts 174 and 175 of the main
including input value keys, a selector apparatus having
power switch 176. The closing of .these contacts will
ordinally arranged selector members, a shifting mecha:
allow current to flow through the live conductor 188, 10 nism operated by said keys for shifting said selector
the contacts 174 and 175 of the main power switch 176,
apparatus, and two function control members, the com
bination comprising a member adjustable in two different
the conductor 191, the movable contact 131, closed con
directions by said value keys, a ?rst electromagnet oper
tact 194 of control switch 132, conductor 198 to the sub
able to effect an operation of one of the said ‘control
traction solenoid 148, through the common conductor
201, conductor 202 to the negative bus 187. This circuit 15 members, a second electromagnet operable to effect an
will energize the subtraction solenoid 148 to move its
operation of the othersaid control member, a control
switch operable in one direction by said adjustable mem
plunger 153 downwardly, thereby depressing the sub
ber to control the operation of said ?rst electromagnet
traction key 116 to effect a subtraction cycle operation
and operable in another direction by said member to con
of the machine, as previously described.
From the foregoing description of a preferred embodi 20 trol the operation of said second electromagnet, and a
normally inoperative main power switch connected in
ment of my invention, it can be seen that I have pro
series to said control switch, and means operated by
vided a live key keyboard requiring little effort on the part
operation of said shifting mechanism to close said main
of an operator to control a machine functional operation,
switch, whereby the shiftingrof said selector apparatus
i.e., to initiate an additive or subtractive operation. In
summary,.it will be recalled that movement of a depressed 25 controls the supply of power to the control switch.
7 ,4. ‘In a calculating'machine having a ten-key keyboard
value key forwardly will operate an electrical control
switch through linkage, which will initiate an operation
including depressible .and laterally movable input value
keys, power-driven cyclic actuating means, and two func
tional control members, the combinationcomprising a
type, e.g., addition. Similarly, when the depressed value
key is moved rearwardly it will operate electrical switches 30 lever adjustable in two different directions operatiyely
connected to each said value key, a movable member
to energize another electromagnet, .thereby initiating a
associated with said adjustable levers and movable in
machine cycle of a second type, e.g., subtraction.
of an electromagnet to initiate a machine‘cycle of one
While I~have described my invention as being employed
in an adding machine, it is obvious that it may be em
either of the two different directions thereby, a bidirec
by those skilled in the art that numerous modi?cations
means, means operated by said solenoid to release said
tional link operated by said movable .member, latch
bodied in other speci?c forms without departing from the 35 means for latching said link in either adjustedposition,
a ?rst normally inoperative switch means rendered oper
spirit or essential characteristics thereof. The present
ative by movement of- s‘aid link in one direction, a ?rst
embodiment is to be considered ‘in all respects as illustra
control solenoid energized by said ?rst operative switch
tive and not restrictive. It, therefore, will be appreciated
and variations thereof are possible within the scope-of 40 latch means and to effect operationof one of the said
functional control members, a second normally inopera
the invention and thus the invention is not to be limited
tive switch means rendered operative by movement of
except by the terms of the following claims.
said link in the other direction, a second control solenoid
What is claimed is:
energized by said second operative switch means, means
1. In a calculating machine having a ten-key keyboard
operated by said solenoid to release said latch means and >
including ten depressible and laterally movable input
to effect operation of the other said functional control
value keys, power-driven cyclic actuating means and two
member, a power circuit including a normally open power '
arithmetical functional controlling means, the combina
switch for said switch means, and means operated upon
tion comprising a .member'movable in two different di
the release of a depressed and laterally moved key for
rections, means for connecting said member to a de
pressed one of said value keys, electromagnetic means 50 closing said power switch.
5. vIn a calculating apparatus having tencdepressible
selectively operable to etfect an operation of one or the
and laterally movable value input keys, a power-driven
other of said arithmetical functional controlling means,
cyclic actuating means, a selector apparatus having ordi
means operable in one direction by said movable member
nally arranged selector members differentially settable to
or in another direction by said member to optionally
energize .said electromagnetic means, a power circuit in 55 selected values by said value keys, and two arithmetical
functional controlling means effective to control operation
cluding a normally open switch for said electromagnetic
of said actuating means, the combination comprising a
common member adjustable in two different directions,
links for connecting said member to each of said value
2. In a calculating machine having a shiftable selec
tion mechanism, an escapement mechanism for shifting 60 keys, a ?rst electromagneticvdevice operable to effect an
operation of one of the said functional controlling means,
said selection mechanism, a ten-key keyboard including
means, and means operated upon release of a depressed
and laterally moved key for closing said switch.
depressible and laterally moveable input value keys, means
a second electromagnetic device operable to effect an
operation of the other said functional controlling means,
switch means operative in one direction by said adjustable
power-driven cyclic actuating means and two function 65 member to initiate an operation of said ?rst electromag
netic device and operative in another direction by said
control members, the combination comprising a mem
member to initiate an operation of said second electro
ber adjustable in two different directions, means for
magnetic device, a power circuitincluding a normally
connecting each of said value keys when depressed
operated by said keys for setting values in said selection
mechanism and operating said escapement mechanism,
open power switch for said switch means, and means
operated upon the release of a depressed key for closing
an operation 70 said power switch.
second elec
‘ 6. In a calculating machine having a plurality of po
operation of
sitionable input value keys, a power-drivencycle actuat
means oper
ing mechanism, a‘ selector apparatus having ordinally
able in one direction by said adjustable member to ini
arranged selector members shiftable as a unit and differ
to said adjustable member to move the same, a ?rst
electromagnetic means operable to effect
of one of the said control members, a
tromagnetic means operable to e?ect an
the other said control member, switch
13
3,030,01é
14
entially settable to selected values by said value keys,
from a depressed centralized position, an adjustable lever
an escapement mechanism for said selector apparatus
operatively connected to said input value keys and ad
operated by said value keys, an addition control member
justable in either of the two different directions thereby,
connected to said power actuating mechanism and opera
a centralizing means cooperating with said levers for
tive to establish an additive operating cycle thereof, and
centralizing said levers and said value keys, a common
a subtraction control member connected to said power
movable member connected to said adjustable levers and
actuating mechanism and operative to establish a subtrac
movable in either of two different directions by any one
tive operating cycle thereof, the combination comprising a
of said levers, a bidirectional link movable in either of
lever connected to each of the said positionable input
the two different directions by said movable member from
value keys and adjustable in two different directions 10 a normally inoperable position, a normally inoperative ad
thereby, a common movable member connected to said
dition control switch operated by movement of said bidi
levers and movable in either of the two different direc
rectional link in one direction, a normally de-energized ad
tions by any one of said levers, a bidirectional link oper
dition solenoid energized by said addition control switch,
ated by said movable member, a normally inoperative
means operated by said addition solenoid to effect opera
addition control switch operated by movement of said 15 tion of said addition control member, a blocking member
bidirectional link in one direction, an addition solenoid
operable to block said bidirectional link in one of its oper
energized by said addition control switch, means operated
ative positions and operable to unblock said link by the
by said solenoid to effect operation of said addition con
operation of said addition solenoid, a normally inopera
trol member, a normally inoperative subtraction control
tive subtraction control switch operated by movement of
switch operated by movement of said bidirectional link in 20 said bidirectional link in the other direction, a normally
the other direction, a subtraction solenoid energized by
de-energized subtraction solenoid energized by said sub
said subtraction control switch, means operated by said
traction control switch, means operated by said subtrac
energized solenoid to effect an operation of said sub
tion solenoid to effect operation of said subtraction con
traction control member, and a normally inoperative main
trol member, a second blocking member operable to block
power switch connected in series to said addition and 25 said bidirectional link in its other operative position and
said subtraction control switches, and means operated
operable to unblock said link by the operation of said
by operation of said escapement mechanism to render
subtraction solenoid, a rockable pawl operable by said
said main switch operative.
bidirectional link to angularly move into engagement
7. A calculating apparatus having a ten-key keyboard
with said ordinal selector members whereby said pawl is
including power-driven cycle actuating mechanism, a se 30 axially movable by operation of said escapement mecha
lector apparatus having ordinally arranged selector mem
nism and a normally inoperative main power switch con
bers angularly movable about a ?xed axis and differen
nected in series to said addition and said subtraction con
tially settable to selected values, a normally inoperable
trol switches operable by the axial movement of said pawl
escapement mechanism for said selector apparatus, an
to render the said main switch operative.
addition control member connected to said power actuat
ing mechanism and operative to establish an additive
operating cycle thereof, and a subtraction control mem
ber connected to said power actuating mechanism and
operative to establish a subtractive operating cycle there
35
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,656,980
of, the combination comprised of depressible input value 40 2,770,419
keys longitudinally movable in two diiferent directions
2.832.531
Fox ________________ .._ Oct. 27, 1953
Campbell et a1. __;_____ Nov. 13, 1956
Chall _______________ __ Apr. 29, 1958
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