US2675961A - Electric calculating system - Google Patents

Electric calculating system Download PDF

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Publication number
US2675961A
US2675961A US217538A US21753851A US2675961A US 2675961 A US2675961 A US 2675961A US 217538 A US217538 A US 217538A US 21753851 A US21753851 A US 21753851A US 2675961 A US2675961 A US 2675961A
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United States
Prior art keywords
contact
registering
cylinder
contacts
timing device
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Expired - Lifetime
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US217538A
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English (en)
Inventor
Larsen Fridthiof Oska Valdemar
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DUBA AB
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DUBA AB
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Priority to BE475738D priority Critical patent/BE475738A/xx
Priority to NL75420D priority patent/NL75420C/xx
Priority to US765997A priority patent/US2581870A/en
Priority claimed from US765997A external-priority patent/US2581870A/en
Priority to GB22348/47A priority patent/GB650792A/en
Priority to CH274564D priority patent/CH274564A/fr
Application filed by DUBA AB filed Critical DUBA AB
Priority to US217538A priority patent/US2675961A/en
Application granted granted Critical
Publication of US2675961A publication Critical patent/US2675961A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/46—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using electromechanical counter-type accumulators
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/46—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using electromechanical counter-type accumulators
    • G06F7/461—Adding; subtracting
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/46—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using electromechanical counter-type accumulators
    • G06F7/462—Multiplying; dividing
    • G06F7/463—Multiplying; dividing by successive additions or subtractions

Definitions

  • the present invention relates to electrical Operating systems for registers, having a plurality of registering units arranged to be set individually about a common shaft to any desired one of a number of diiferent positions under the control of a timing device and multistage switching device for selecting the positions to which the difierent registering units are to be set.
  • One object of the present invention is to avoid this drawback in electrical operating systems for registers, e. g., in electrical calculating systems, to which end a single multistage switch is used for selecting the desired settings of all of the said registering units in combination with a second multistage switch for selecting the registering unit to be set.
  • Both of said multistage switches which may be of the electromagnetically operated rotary selector switch type which automatically returns tov its home positions when the setting magnet is de-energized, may be arranged for remote control.
  • Another object of the invention is to devise an electric operating system of the kind referred to in which a registering unit to be set is coupled to the driving shaft of the timing device at the starting moment of said device and automatically disengaged from said shaft in the moment of time after the start to which the registering unit has been set to the desired position, and in Which the operation of the timing device is automatically interrupted when the timing device has been rotated through an angle of 360.
  • a further object of the invention is to devise a simple construction of a rotary timing device for the common control of the setting of all of the registering units of a register.
  • a timing device in an electrical system comprises a rotary operative member and a stationary contact, facing said operative member and extending substantially in the direction of the axis of rotation of said member and a plurality of mutually spaced movable contacts engaging said stationary contact and arranged to be disengaged singly and in turns from said stationary contact by means of the said operative member, which is arranged to be coupled to the driving shaft of a registering unit to be set so as to be rotated synchronously with a registering unit and is further arranged to cause said spaced movable contacts to be successively disengaged from said stationary contact, which spaced electric contacts are arranged to be selectively connected up in the operating circuit of the operating circuit of the unit to be set in series with the said stationary contact by means of the multistage switches referred to above and adapted to determine the position to which the unit is to be set.
  • A. still further object of the invention is a modification of an electrical operating system for registers in which a timing device of the kind referred to above is arranged to simultaneously control the setting of two or more registering units.
  • the rotatably mounted member of the timing device is a cylinder having a helical row of radial projecting cams on its cylindrical face and the said common counter contact is a stationary rod arranged parallel to the axes of said cylinder spaced from the said cams, whereby each of the mutually spaced contacts arranged to cooperate with said oblong counter contact is movable radially in relation to said counter contact and said cylinder by means of an actuating member engaging the cylindrical surface of said cylinder in the region of movement of one of the cams of the cylinder.
  • Fig, 1 is a diagrammatic view showing the ar-.
  • Fig. 2 is a similar view of a modified form of a system according to the invention in which the registering units are arranged to be rotated about the driving shaft of the system, and
  • Fig. 3 is a diagrammatical view of a modification of a system according to Fig. 1 in which the timing device is arranged to set a number of registering units simultaneously.
  • Figs. 1 and 3 are a plurality of registering units rotatably mounted on a common shaft 2 and provided with numerals of other characters on their circumferential surfaces.
  • the registering units 1 are individually adjustable to positions in which desired characters on their circumferential surfaces are visible in a display opening 3, Fig. 3, of a casing i surrounding the registerin units I and their operating mechanism. This casing is for the sake of clearness not shown in Figs. 1 and 2.
  • the registering units 1 are arranged side by side and shaped as drums, but if desired they may be given any other suitable shape, e. g. that of a disc or a sector.
  • registering units i are rotatably mounted on a common shaft 2.
  • a gear wheel 5 meshing with a gear wheel 8 which in this embodiment is driven by a driving motor common to all registering units, which means all registering units l arranged to freely rotate about the shaft 2.
  • Each registering unit may be coupled to the shaft 21 of the motor 25 by means of a coupling magnet l3 individual thereto.
  • Each magnet l3 has an armature [2 which upon energization of the coupling magnet displaces the gear wheel 8 in its own plane in such a manner that, without being disengaged from the gear wheel 5, the gear wheel 8 is engaged with a gear wheel 28 on the driving shaft 21 which is common to all registering units l of a group.
  • the shaft 21 is coupled to the motor 25 through a reversing gear 23 that may be reversed by means of a remote controlled magnet 29.
  • a cylinder or drum 31 having a number of radially projecting cams 32 arranged along a helical line.
  • the purpose of these cams is, during rotation of the cylinder 3! successively and alternately to disengage a number of mutually insulated and spaced movable contacts l1 arranged in a row parallel to the shaft of the cylinder 3'! from a stationary oblong contact member l5 arranged along the cylinder 3
  • the contacts is and I! combine with the cylinder 3
  • Each of the contacts I! is provided with an insulating actuating piece 33 each of which engages the circumferential surface of the cylinder 3
  • the contact bar [6 is by way of a conductor 45 connected to the wiper arm 34 of a multistage switch or selector switch 34, 35.
  • Each of the stationary contacts 35 of this selector switch is connected to one end of the energizing coil of an individual one or" the coupling magnets 3.
  • the other ends of the energizing coils of all of the coupling magnets 13 are connected to one terminal of a current source 22, the other terminal of which is earthed.
  • M is the energizing coil of an electromagnet for stepping the wiper l9 over the contacts l8.
  • the said energizing coil is connected up in a circuit including in series the current source 22, the said coil 4!, the conductor 42 and a key or an interrupter 42 which if desired may be lo. cated at a remote operating place and arranged to be operated manually to cause the said circult to be alternately closed and interrupted in order that current impulses are produced stepping the wiper 19 in direction of the arrow pin Fig. l by means of the magnet 4
  • Wiper I9 is stepped against the action of a spiral spring lea, tending to move the wiper 19 in the opposite direction to set upon a separate contact i86-the home contact--from which the said stepwise motion of the wiper I9 is always started, and to which home contact the wiper is automatically retumed by means of said spring [9a, when the registration aimed at by the setting of the wiper :3 has been effected, as described below.
  • a ratchet wheel Sc secured to the wiper 13 to be rotated together with it cooperates with a pawl i917 preventing the return motion, but not the said stepwise motion, of the wiper as long as a relay 40 more especially referred to below, is energized, then causing the pawl lBb to engage the ratchet wheel against the action of a spring lfid.
  • the wiper 34 of the switch 34, 25, is adapted to be swept in a stepwise manner over the contacts 35 by means of an electromagnetic setting member, the energizing coil 43 of which is connected up in a circuit including the current source 22, the coil 43, a conductor :24 leading to a key or an interrupter I43 which may be located at a remote place from which the apparatus described is to be operated, and adapted to alternately close and interrupt the said circuit to cause current impulses to be created in same by the current source 22 for the purpose of setting the wiper 34.
  • a registering unit I is to be set in a desired position, i. e. in such a manner that a desired numeral on the circumferential surface of the registering member, the numeral 5, is visible in the aperture 3, Fig. 3, then the wiper 34 of the switch 34, 35 is to be set on that one of the contacts 35 which is connected to the coupling magnet l3 of the registering unit in question through a conductor 23.
  • This setting is effected by means of current pulses produced as described above in the circuit of the energizing coil 43 of the setting magnet, of the multistage switch 34, 35.
  • the wiper i9 is set by means of impulses produced in the manner described above in the circuit of the coil 4
  • the said contact i8 is connected to earth through the coil of a relay 40 and the wiper l9 and accordingly a circuit 'is' completed from earth via the source 22, the energizing coil of the coupling magnet I3 belonging to the registering unit I in question, the conductor 23, the appurtenant contact 35, the wiper 34, the conductor 45, the contact I6 of the timing device, the contact I! connected to the contact.
  • the contact arm IS the energizing coil of the relay 4B and earth.
  • the relay 49 attracts an armature A mounted on the pawl I91), causing the pawl to engage ratchet wheel ISc thus preventing return motion of wiper I9 to contact I80.
  • the coupling magnet I3 is energized and displaces the gear wheel 8 so asto intercouple the gear wheels 5 and 26 and at the. same time the relay 40 operates to lock'the wiper I9 .in the position to which it has been set and to close a contact 40a in the supply circuit of the motor 25, thus causing the motor to start and "rotate the. cylinder 3i and the gear wheels 28 so that themegistering unit I, the coupling magnet 63 of...which was energized is caused to move synchronouslywith the cylinder 3 I. During the rotation of the latter the cams 32 on the circumferential surface. of the cylinder will successively and alternately disengage the various contacts I 1 from the contact I6, and when the individual contact I?
  • the circumference of the disc 41 is mainly circular and co-operated with the contact '49 to cause this contact to engage 6i K 40a by way of a contact 49a, which was closed by the wiper I 9 when 'said wiper was returned to the home contact I80.
  • the short circuit is main tained until a recess 48 in the edge of the disc 41 is moved on to the contact 49. Then a projection 5
  • the position of the disc 41 relatively to the shaft 21 is so adapted, that this occurs when the cylinder 3i is moved into its said initial position.
  • the disc 41 causes the contacts 49 and 50 to short-circuit the contact 400. immediately after the initial starting motion of the motor 25.
  • the reversing gear 28 By operating the reversing gear 28, e. g; by remote control of the control magnet 29 of this gear, the'direction of; rotation of the registering members may be reversed. This will e. g. be necessaryin calculatingregisters that are to be used for subtraction. If such functions are not required',.the reversing gear 28.may be dispensed With.
  • the cylinder 3! is arranged to be driven by the driving motor 25 of the registering units 1.
  • This arrangement is not compulsory, seeing that it might be preferred tomodify the arrangement in such a manner that the motor 25 only drives the cylinder 3I, while the reversing gear, and the registering members are drivenby a separate motor which then controlled in such a manner as to run synchronously with the motor 25.
  • This is particularly advantageous in such cases where it is desired to arrange the cylinder 3I and the timing device'IB, II, 3I at a place remote from the registering members.
  • the selector switch 34, 35 may be dispensed with if the timing device is provided with a plurality of sets of contacts IT and appurtenant contact bars I 6, each set of contacts I6 and I! serving the purpose of controlling the setting of an individual registering member in a group.
  • Fig. 3 shows an embodiment of this kind.
  • '3 I' is a cam cylinder of the same nature as the cam cylinder 3
  • the said units I are arranged to be coupled to the shaft 2?, rotated by the motor 2 5, each by means of a gear 5, 8, 26 controlled in "the manner described above by an individual coupling magnet.
  • Two such coupling magnets I3'and'I31 are'shown in Fig. 3.
  • One end of the energizing coil of each coupling magnet i3, I31 is connected to one end of the same terminal of the current source 22, the other terminal of which is earthened.
  • each contact in each of said rows has a radially disposed actuating member 33 which is common to one contact I1, I11), I10 in each of said rows and engages the cylindrical circumference of the cylinder 3! in the region of movement of one of the cams 32.
  • the different contact devices l6, l1 and Nib, 11) and I60, I10 respectively form in combination a substitution for the multistage switch 34, 35 in Fig. l, and the timing device shown in Fig. 3 is thus to be considered to constitute a combination of a timing device of the kind described above in connection with Fig. l and the multistage switch 34, 35 shown in Fig. 1.
  • the contacts I1 are connected each to an individual bank contact if; in a selector switch [8, IS, the wiper l9 of which is controlled exactly in the same manner as the wiper H! in Fig. 1 by means of the driving magnet 4
  • the contacts I12) and H0 are connected each to one of the contacts I82) and
  • 9c is connected to earth through the winding of the relays 40, 49b and 400 respectively.
  • Each of these relays controls a contact 40a, 40a respectively, in the circuit of the motor 25 in the manner and for the purpose described above in connection with the relay 40 in Fig. 1.
  • the operation of the embodiment shown in Fig. 3 is exactly the same as that shown in Fig. 1, are only with the difference that the registering units are set individually or two or more at a time, according as to whether earth potential is applied to one of the contacts l6,
  • the setting of the registering units will then take place exactly in the same manner as described with reference to Fig. 1. In this manner, a plurality of the registering units may be set simultaneously.
  • each of the contact bars it, i611 and 15s are to be selectively connected to one end of the energizing coils of the coupling magnets i3 of all of the registering units in one and the same group by way of a selector switch similarly to the arrangement illustrated in Fig. 1 comprising the selector switch 34, 35, the conductors 23 and the conductor 45 and the operating magnet
  • the motor 25 may be arranged to run continuously, the cylinder 3
  • An example of an embodiment of this character is shown in Fig. 2.
  • to control the registering members is exactly the same as mentioned above in connection with the embodiment according to Fig. 1.
  • the registering units are mounted to rotate about the part 300 of the driving shaft 21 instead of about a separate shaft 2, as in Figs. 1 and 3 and are each provided with a brake not shown of any suitable kind adapted to prevent the units from rotating about the shaft 309 when such rotation is not intended to.
  • the registering units may be individually coupled to the said shaft 21 by means of magnetically controlled clutches 54.
  • Each clutch 54 is controlled by a coupling magnet 55 having an armature 56 which, when attracted, engages the clutch and, when released, permits the clutch to be disengaged under the influence of a spring 51.
  • is coupled to the shaft 21 by means of a magnetically controlled clutch 58 adapted to be engaged by means of a coupling magnet 59 and to be disengaged by means of a spring 50.
  • the motor 25 is arranged to continuously rotate the shaft 21, 300 of the registering units.
  • the procedure of setting a registering unit on a desired figure in an embodiment according to Fig. 2 is as follows:
  • the arm I9 is set by means of the coupling magnet 4
  • the relay closes a contact 40a, causing an energizing coil 59 of a magnetically controlled clutch 58 to couple the cylinder 3
  • the registering unit is then set in the manner described, and the setting movement of the registering unit is stopped when the cam cylinder disengages the contact l1 in question from the contact l6 because then the circuit through the coil 55 is interrupted at said contact l1.
  • continues to rotate, because the coil 59 remains energized in the circuit including in series the current source 22, the contact 4911 and the energizing coil 59, and the contact 49, arranged to be engaged by a disc 41 arranged to rotate together with the cylinder 3
  • the disc 41 and the contacts 49, 5O serve a similar purpose of the corresponding parts in Fig.
  • and the registering units l are driven at a predetermined angular velocity relatively to one another, so that corresponding to a certain angleof rotation of the cylinder there will be a certain angle of rotation of the registering unit controlled by the cylinder in each particular instance.
  • the same result may be obtained more conveniently and rapidly according to the invention by arranging'for the registering units, at the registration of each individual figure of one factor, to performa rotary motion as many times as great as the motion they would normally have to perform in order to register the figures in question, as the figure of the second factor with which the first-named figure is to be multiplied, is greater'than unity.
  • This may be obtained by coupling the cam cylinder 3
  • may be rotated at higher speed in the case of division, so that the turning movement of the registering units becomes a multiplum of the movement that would be necessary in the case of subtraction to introduce a figure corresponding to the divisor in the numbers to be divided by each other, via, a multi plum equal to thequotient of divisor and dividend.
  • Themanner in which this division is performed does not as such form part of the present invention,,but ,it-is just to bementioned thatthe cal.- culation apparatus in consideration may be adapted for performing these calculating operations.
  • the only distinguishing feature of the invention ,ofthis connection is that the cam cylinder may be coupled vto the shaft 21 through a variable-speed gearing.
  • An electrical operating system for registers having a driving motor, a driving shaft coupled to said motor, a number of registering units freely rotatable about said driving shaft, a number of coupling devices for coupling said units individually to said driving shaft, electromagnets for operating said coupling devices, a current source for energizing said electromagnets, a timing device for controlling the setting of any one of said registering units coupled to said driving shaft and comprising an operative member rotatably mounted on said driving shaft, a clutch for coupling said operative member to the driving shaft, an electromagnet for operating said clutch, a stationary contact facing the said operative member at spaced interval from same and extending substantially in the direction of the axis of rotation of said member, a number of movably spaced contacts arranged to engage said stationary con tact and mm singly and in turn temporarily disconnected from same during the rotation of said operative member, a control switch for automatically disengaging the clutch of said operative member after said member has operated all of said spaced contacts, an electromagnetic-ally controlled multi
  • An electric operating system for registers having a plurality of registering units repeatedly rotatable about a common axis through positions corresponding to digital values zero to nine, a current source, an electric motor arranged to be fed from said current source, a driving shaft to be rotated by said motor, clutches for selectively coupling said units to said driving shaft, electromagnetic clutch control members for engaging and disengaging said clutches, a first selector switch for connecting any of said clutch control members separately in an operating circuit, to energize said clutch control member, a timing device having a rotatable cylindrical operative member, electromagnetically controlled means for starting a rotation of said operative member synchronously with the rotation of the said driving shaft and simultaneously with the energization of the said clutch control member connected in said operating circuit by said.
  • first selector switch means on said operative member for interrupting said operating circuit at apredetermined interval of time after the start of the rotary movement of said operative member, a control member for interrupting the rotation of the said operative member upon having rotated through a full cycle
  • the said, timing device comprising a stationary contact spaced from said operating member and extending substantially parallel to the axis of said operative member, a number of mutually spaced movable contacts engaging saidst'ationary contact and arranged to be operated by said operative member when rotated so as to be alternatively and temporarily disengaged from said stationary contact during a full revolution of said operative member-,and a second selector switch arranged to selectively connect any of said movable contacts in the said operating circuit, said operating circuit including in series a current source, the clutch control member connected by said first selector switch, the stationary contact of said timing device, the movable contact of the timing device connected by said second selector switch and the said means for starting rotation of said operative member.
  • An electric operating system for registers having a plurality of registering units repeatedly rotatable about a common axis through positions corresponding to digital values zero to nine, a current source, an electric motor, a starting switch for connecting said motor to a supply circuit including said current source, means for operating said switch electromagnetically, a driving shaft to be rotated by said motor, clutches for selectively coupling said units to said driving shaft, electromagnetic clutch control members for engaging and disengaging said clutches, a first selector switch for connecting any of said clutch control members separately to an operat ing circuit to energize said clutch control means, a timing device having a.
  • the said timing device comprising a stationary contact spaced from said operative member and extending substantially parallel to the axis of said operative member, a number of mutually spaced movable contacts engaging said stationary contact and arranged to be operated by said operative member when rotated so as to be alternatively and temporarily disengaged from said stationary contact during a full revolution of said operative member, and a second selector switch arranged to selectively connect said movable contacts in the said operating circuit, said operating circuit including in series a current source, the clutch control member connected by said first selector switch, the stationary contact of said timing device, the movable contact of the timing device connected by J said second selector switch and the said means for operating the starting switch of the said motor to start the rotation of said operative member.
  • An electric operating system for registers having a plurality of registering units repeatedly rotatable about a common axis through positions corresponding to digital values zero to nine, a current source, an electric motor, an electromagnetically controlled starting switch for said motor,
  • first series of clutches for selectively coupling said units to said driving shaft, electromagnetic clutch control members for engaging and disengaging said first clutches, a first selector switch for connecting any of said clutch control members separately in an operating circuit to energize said clutch control member, a timing device having a rotatable cylindrical operative member, a second elcctromagnetically controlled clutch for coupling said operative member to said rotating driving shaft simultaneously with the energization of a first clutch control member, means on said operative member for interrupting said operating circult at a predetermined interval of time after the moment of intercoupling of said operative member and said driving shaft, a control member for disengaging said operative member from said driving shaft when the operative member has been rotated through a full cycle, the said timing device comprising a stationary contact spaced from said operating member and extending substantially parallel to the axis of said operative member, a number of mutually spaced movable timing device, the movable contact of said timing device connected by said second selector switch and the electromagnetic
  • An electrical operating system for registers having a number of registering units arranged to be rotated about a common axis, an electric motor, a driving shaft coupled to said motor, a number of coupling devices arranged each to couple an individual one of said registering units separately to said driving shaft, electromagnets for operating said coupling devices, a current source for energizing said electromagnets, a timing device comprising a rotatably mounted cylindrical operative member arranged to be rotated about its axis by said shaft simultaneously and synchronously with a registering unit coupled to said shaft, a number of spaced contacts arranged to be operated by said timing device, a first electromagnetically controlled multistage switch for connection to any one of said timing device contacts, a second electromagnetically controlled multistage switch for connecting the energizing coil of any one of said electromagnets in an operating circuit, said operating circuit including in series the energizing coil of said electromagnets, said first multistage switch, a contact of said timing device, the said second multistage switch and said current
  • timing device is provided with a plurality of stationary spaced contacts spaced at varying distances from the operative member of said device and extending substantially parallel to the direction of the axis of rotation of same, and in which a separate set of spaced movable contacts are arranged along each separate one of said stationary contacts, said stationary contacts being connected each to one end of an individual one of the energizing coils of the electromagnets for operating the coupling devices of a separate registering unit, and the contacts of each set of spaced movable contacts being connected to a bank contact in a separate multistage switch for connecting up any desired one of the movable contacts of the set in question in the circuit of the energizing coil one end of which is connected to the appurtenant stationary contact.
  • An electrical operating system for registers characterized by a gear having a variable ratio of exchange and arranged to couple the rotatable member of the timing device to the driving shaft of said register.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
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  • Computational Mathematics (AREA)
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  • Mathematical Optimization (AREA)
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  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
US217538A 1946-04-29 1951-03-26 Electric calculating system Expired - Lifetime US2675961A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE475738D BE475738A (ru) 1946-04-29
NL75420D NL75420C (ru) 1946-04-29
US765997A US2581870A (en) 1946-04-29 1947-08-04 Total transfer mechanism
GB22348/47A GB650792A (en) 1946-04-29 1947-08-12 Electrical calculating apparatus
CH274564D CH274564A (fr) 1946-04-29 1947-08-28 Machine à calculer électrique.
US217538A US2675961A (en) 1946-04-29 1951-03-26 Electric calculating system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK650792X 1946-04-29
US765997A US2581870A (en) 1946-04-29 1947-08-04 Total transfer mechanism
US217538A US2675961A (en) 1946-04-29 1951-03-26 Electric calculating system

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US2675961A true US2675961A (en) 1954-04-20

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US217538A Expired - Lifetime US2675961A (en) 1946-04-29 1951-03-26 Electric calculating system

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US (1) US2675961A (ru)
BE (1) BE475738A (ru)
CH (1) CH274564A (ru)
GB (1) GB650792A (ru)
NL (1) NL75420C (ru)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789758A (en) * 1953-12-30 1957-04-23 Monroe Calculating Machine Means for connecting a calculator with a printer or other recording means
US2896845A (en) * 1958-07-16 1959-07-28 Gen Dynamics Corp Mechanical character display device for electronic means
US2948464A (en) * 1954-06-11 1960-08-09 Hobart Mfg Co Computing mechanism
US2998596A (en) * 1957-12-05 1961-08-29 Bell Telephone Labor Inc Translator and display device
US3019980A (en) * 1956-12-13 1962-02-06 Brunsviga Maschinenwerke Ag Apparatus for the reception, storage, and re-emission of positive and negative numerical values, especially for use with standard office machines

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1302616A (en) * 1915-05-19 1919-05-06 Powers Accounting Machine Company Automatic tabulating-machine.
US1882764A (en) * 1927-08-05 1932-10-18 Tabulating Machine Co Electric transfer for tabulating machines
US2236794A (en) * 1935-10-09 1941-04-01 Furber Henry Jewett Mechanism for division
US2416369A (en) * 1940-08-02 1947-02-25 Marchant Calculating Machine Actuating mechanism for registers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1302616A (en) * 1915-05-19 1919-05-06 Powers Accounting Machine Company Automatic tabulating-machine.
US1882764A (en) * 1927-08-05 1932-10-18 Tabulating Machine Co Electric transfer for tabulating machines
US2236794A (en) * 1935-10-09 1941-04-01 Furber Henry Jewett Mechanism for division
US2416369A (en) * 1940-08-02 1947-02-25 Marchant Calculating Machine Actuating mechanism for registers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789758A (en) * 1953-12-30 1957-04-23 Monroe Calculating Machine Means for connecting a calculator with a printer or other recording means
US2948464A (en) * 1954-06-11 1960-08-09 Hobart Mfg Co Computing mechanism
US3019980A (en) * 1956-12-13 1962-02-06 Brunsviga Maschinenwerke Ag Apparatus for the reception, storage, and re-emission of positive and negative numerical values, especially for use with standard office machines
US2998596A (en) * 1957-12-05 1961-08-29 Bell Telephone Labor Inc Translator and display device
US2896845A (en) * 1958-07-16 1959-07-28 Gen Dynamics Corp Mechanical character display device for electronic means

Also Published As

Publication number Publication date
BE475738A (ru)
GB650792A (en) 1951-03-07
CH274564A (fr) 1951-04-15
NL75420C (ru)

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