US2214010A - Statistical card comparing machine - Google Patents

Statistical card comparing machine Download PDF

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Publication number
US2214010A
US2214010A US284075A US28407539A US2214010A US 2214010 A US2214010 A US 2214010A US 284075 A US284075 A US 284075A US 28407539 A US28407539 A US 28407539A US 2214010 A US2214010 A US 2214010A
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Prior art keywords
card
punch
comparing
master
stud
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Expired - Lifetime
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US284075A
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English (en)
Inventor
Karl J Braun
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Unisys Corp
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Remington Rand Inc
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Priority to NL68396D priority Critical patent/NL68396C/xx
Application filed by Remington Rand Inc filed Critical Remington Rand Inc
Priority to US284075A priority patent/US2214010A/en
Priority to CH216272D priority patent/CH216272A/de
Priority to GB11624/40A priority patent/GB542732A/en
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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

  • This invention relates to machines for comparing perioration patterns in different records, and, particularly, to means for variably controlling thepunching of additional perforations in selected records, as the result of the comparison, or non-comparison, of the compared perforation patterns.
  • Each of these operations may be-efiected selectively or in combination with eitheror both of the others upon the sensingof a comparison, or
  • Furthermoraan oper-' ation selector mechanism is provided whereby a given machine may be preconditioned, in accordance withthe several individual typ s of record handling problems that may arise in a given accounting or statistical system, to effect selectively any one of a plurality of-the various available 55 combinational operations of record sorting,
  • the present invention provides, as its principal object, an improved form of operation selector mechanism whereby the number of difierent combinational operations that may be performed on a given machine may be substantially increased.
  • Another object of the invention is to provide improved means for controlling record punching in such machines in accordance with the sensing of a comparison, or non-comparison, between designative perforation patterns in master and 29 detail records.
  • Fig. 1 is a conventionalized left'side elevation of the invention, in conjunction with the elements of a statistical card comparing machine that cooperate therewith, showing the relative positions of the several elements when the machine is in normal or stopping position;
  • Fig. 1A is a view taken along the line AA of 30 Fig. 1 showing the relative positions of the operation selector dial and the punch control lever;
  • Fig. 1B is a detail of the inner ratchet of the control device actuating mechanism
  • Fig. 1C is a detail of the outer ratchet of the 35 control device actuating mechanism
  • Fig. 2 is an enlarged elevation of a portion of the mechanismof Fig. 1, showing theseveral elements in operated position at the time the locking slides for the punch set pins are fully re- 40 tracted;
  • Fig. 3 is a plan view of the operation selector mechanism, taken substantially along the line 3-3 of Fig. 1;
  • Fig. 4 is a plan view of a portion of the control mechanism for the punch set pin retract mechanism, taken substantially along the line 4-4 of .F 1; v
  • Fig. 5 is a timing diagram
  • FIG. 6 is a schematic illustration of the principal elements of a statistical card comparing machine of the type disclosed in the above mentioned patent; and V Fig. 7 is a chart illustrating the various groups of combinational card handling operations that tion is particularly adapted to function, is includ-' ed hereinafter. For a detailed description of such machine, reference may be had to said patent.
  • the perforation pattern therein is sensed by pins in a reciprocating detail card sensing mechanism whereby a mechanical representation of such perforation pattern is transmitted, by means of pins in an upper pin box and translator wires in a translator 255, to
  • the master cards are placed in a master card magazine 290 and are passed seriatim to suitable feed rolls whereby they are conveyed to the master card sensing chamber in which their perforated data is analyzed. From the master card sensing chamber, the master cards are conveyed either to a receiver pocket 25 or to an eject pocket 26, depending on the setting of the card sorting control mechanism and the character of the designative data in the cards.
  • the mechanical representations of perforation patterns'in simultaneously sensed master and detail cards are mechanically compared, and the occurrence of a comparison, or non-comparison, between such perforation patterns is utilized to control or vary machine operations.
  • comparing slides 410 one of which is partially illustrated in. Fig.1.
  • the construction and arrangement ofthe comparing mechanism is such that in the event the compared perforation patterns are identical, the slides 410 are free to move to the left topermit leftward movement of a comparing slide sensing bail rod 640 as in Fig. 1, whereas, if either pattern contains a perforation for which there is no counterpart ln'the other, one or more of the slides 410 are blocked and serve to prevent the leftward movement of bail rod 640.
  • the manner in which bail rod 640 is operated to sense the position of comparing slides 410 is described hereinafter under the heading Control deviceactuating mechanism.
  • the punch mechanism includes a punch translator for transmitting mechanical representations of master card perforation patterns; a reciprocable set pin box, including set pins for sensing and retaining the mechanical representations of perforation patterns so transmitted, and punch gags for perforating detail cards in accordance with the setting of the set pins; a retract mechanism to cancel or erase the setting of the set pins; and a punch chamber in which the detail cards are retained during punching operations.
  • a removable punch translator 485 (Figs. 1 and 6) provided, with a plurality of rows of translator wires 490, is arranged beneath the master card comparing pin assembly 425.
  • the depression of any pin in the master card comparing pin assembly under control of a sensing pin in the master card sensing mechanism, results in the depression of the corresponding translator wire 490.
  • a mechanical representation of a master card perforationpattern is registered by depressed translator wires 49!], and, due to the arrangement of the locking mechanism for the pins in the reading retaining mechanism, such registration is retained until the succeeding master card is sensed.
  • a reciprocable set pin box 55 mounted with a plurality of rows of spring urged set pins 500 which, when depressed, may be locked in their lower positions by spring urged locking slides 502.
  • set pin box 495 is movedupwardly (see also Fig. 5), by complementary cams Sill keyed to a cam shaft 50, to force set pins 500 against all translator wires 49!) that 'are held depressed in accordance with the perforation patof any depressed set pin 500 by its associated locking slide 502.
  • set pin box 495 is provided with means to retract the set-up made by the preceding master card during the time a new master card set-up is made.
  • a retract bail bar 54! (Figs. 1 and 2), arranged to coact with the rearward ends of all locking slides 502, is pivotally supported by a pair of arms 542 fast on a rock shaft 543 suitably journaled inthe machine.
  • a vertical face 545 on the rearward edge of each arm 542 is arranged, during the entire vertical movement of set pin box 495, to ride against a roller 546 on an arm 54'! fast to a trans verse rock shaft 548 journaled in a bracket 558.
  • each of the mechanisms for effecting or varying machine functions such as card feeding, sorting, punching, and stopping the machine, as the result of the sensing of a comparison, or noncomparison, in the perforation patterns of master and detail cards, are actuated by individual control cams which may be rendered effective either singly or in combination, as desired, and are arranged for step-by-step operation by common actuating mechanism under control of the comparing mechanism.
  • the several control cams and their associated mechanisms, the manually settable means for rendering the control cams effective, and the control cam actuating mechanism are referred to as the Control device.
  • Eac h of the several i a machine of this type is secured to a sleeve 600 .
  • Each I is arranged to control its associated mechanism in one manner when the perforation patterns in simultaneously sensed cards compare, and in a differ- Therefore, the control cams are functions'whenever a non-comparison is sensed after a cycle in which a comparison was sensed and, also, whenever a comparison is sensed after a cycle in" which a non-comparison was sensed.
  • an actuating mechanism operable under control of the comparing mechanism, is provided to. cause recurrent step-by-step movement of sleeve 600.
  • This mechanism comprises an inner ratchet-"605 (see Fig.
  • ratchets are fast to sleeve 50D but are offset relative to each other so that teeth BIB of ratchet 6
  • Coacting with ratchet 605 is an actuating pawl 608, urged clockwise by a light spring (not shown), carried by the horizontal arm of a lever 518 which is pivoted on a frame stud BI!
  • ratchets 695, M5, and pawls 6118, H8 are such that during machine cycles following those in which a comparison is sensed, pawl 5B8 registers with a blank space on ratchet 505, whereas, pawl (H8 is adapted to register with a tooth M5 on ratchet M5.
  • levers 6H) and 620 are in their lowermost positions, a stud 623 on pawl 6B8 coacts with a cam surface 624 on pawl Git whereby pawl 6 I8 is moved counter-clockwise against the tension of sprin SIS to prevent the engagement of the pawl with a tooth 6 It.
  • an oifset push rod 825 For operating pawls 608 and H8, an oifset push rod 825, provided at its upper end with an abutment 625 arranged to coact with levers Bill and 628, is connectedto an arm 62'! pivoted at 628 and provided with a follower roller E29 coacting with a cam 63! keyed to front cam shaft 40.
  • the arrangement of cam 63! (see also Fig. 5) is such that levers 61B and 620 are held in their uppermost position by push rod 625 and abutment 626 during the greater part of each cycle, but are urged downwardly by their springs at approximately 30 before the end of the cycle, and reach their lowermost positions at the end of the cycle.
  • push rod 625 is elevated and, in the event either pawl such perforation patterns do eral positions.
  • cam 630 elevates push rod 625and, through lever 620, link 636, bell-crank 631, and arm 64!, rocks shaft 638 clockwise to move bail rod 640 out of engagement with interponents 416.
  • follower roller 629 rides into the low dwell of cam 630, thereby lowering lever 620 and link 636, and thereby permitting spring 643 to urge bell-crank 631 and shaft 638 counter-clockwise.
  • bail rod 640 is free to move leftwardly, whereby shaft 638 rocks counterclockwiseand withdraws shoulder 644 on arm 64
  • pawl 608 rides on a blank space of ratchet 605, and stud 623 coacts with cam face 624 to prevent the engagement of pawl 6l8 with ratchet -6l5.
  • stud 623 is ineffective to prevent the engagement of pawl 6l8, whereby spring 6
  • push rod 625 is again elevated to actuate lever 620 and pawl 6l8 which, in turn, actuate sleeve 600.
  • lever 6" In the event another non comparison is sensed at the end of the succeeding cycle, lever 6" is retained in its uppermost position, as above. In this case, since pawl H8 is now in register with a blank space on ratchet 6l 5, lever 620 moves idly and no further movement is imparted to sleeve 600. This condition is maintained as long as the perforation patterns in simultaneously sensed master and detail cards do not compare. However, when the next comparison is sensed, bail rod 640 and shaft 638 are free to rock counter-clockwise, and serve to disengage shoulder 644 from latch face 645 to permit lever 6l0 to follow. push rod 625 downwardly.
  • a statistical card comparing machine of the type disclosed in the cited patent comprises a punch mechanism, settable in accordance with the perforation patterns in master cards, whereby one or more columns of information in a master card may be transferred to one or more detail cards.
  • the patent discloses a control mechanism for the punch set pin retract mechanism whereby the machine may be set to 1. Punch additional data in comparing detail cards and prevent punching of additional data in non-comparing detail cards, or
  • the present invention provides means'operable by a single control cam for controlling theoperation of the punch set pin retract mechanism, whereby punching may be prevented when a comparison or a non-comparison occurs, as desired, and, further, provides an individual, manually settable control to permit the selection of any desired type of punching operation by itself, or in conjunction with any combinational operation or sorting and/or stopping that may be selected by the operation selector dial.
  • the set pin box in the punch mechanism is adapted to reciprocate during each machine cycle, and is arranged, during the mid-portion of each cycle, to sense and retain a mechanical representation of the master card perforation pattern registered by depressed punch translator wires, and to transfer such perforation pattern to a detail card at the end of the cycle. If it is desired to prevent the transfer of a perforation pattern to a non-comparing detail card, means must be provided to prevent the retention .of the perforation pattern in the set pin box when a non-comparison is sensed. Further, if it is desired to prevent the transfer of a perforationpattern to a comparing detail card, means must be provided to prevent the retention of the perforation pattern when a comparison is sensed.
  • the invention provides two arms 8!) and. 8!2 (Fig. 1) pivotally, mounted on a stud 8 on arm 55! of the punch set pin retract mechanism. Arms 8!0 and 8!2 are urged together by a light spring 8 5, and each is'provided with a latching shoulder 8! 8l3, respectively, capable of engaging a square stud 8l6 secured to bracket 550.
  • the arrangement is such that when arm 55! is rocked under control of cam 580 near the mid-point of a cycle, to cause the retraction of locking slides 502 ,(as in Fig. 2), arms M0 and M2 are raised sufiiciently so that either latching shoulder 8!!
  • arm 8 I 0 may be rendered efiective to engage stud 8 6 to prevent punching when a noncomparison is sensed
  • arm 8!2 may be rendered eifective to engage stud 8!5 to prevent punching when a comparison is sensed.
  • a man uallysettable punch control lever 800 (Figs. 1, 1A, 2 and 3) is pivotally mounted on a frame stud 652, and is connected at its lower end to a link 80! which is provided with a slot 802,
  • lever 800 projects through the frame of the machine at a point adjacent to the operation selector dial (see Fig. 1A), operator, so that it maybe set to either'an upper position (U), a lower position (L),v or an intermediate position (I), in each of which it is re tained by a spring urged detent pawl 804 (Figs. 1 and 2), pivoted on bracket 55!), that engages notches on the lower side of link 80!.
  • Fixed on link'80! is a stud 805 that projects between arms 8!!) and such that when lever 800 is set in its intermediate position, as shown in Figs. 1 and 2, the latching shoulders 8!! and 8!3 of arms 8l0 and 8!2 are held out of engagement with stud 8 6 at all times.
  • lever 800 when lever 800 is set in its intermediate position, arms 8! 0 and 8!2 are ineffective to hold locking slides 502 retracted, whereby the set pin box functions, as described above, to sense and retain a master card perforation pattern during each .cycle, and to transfer such pattern to a detail card held in the" punch chamber.
  • lever 800 when lever 800 is moved to its upper position, link 80! is shifted to the right, from its position in Figs. 1 and 2, whereby stud 805 rocks latching shoulder 8!3 on arm 8l2 further out of engagement with stud 8l6, but frees arm 8! 0 to permitthe engagement of shoulder ,8! with stud 8N5 unless such engagement is prevented by other means, as hereinafter described; whereas, when lever 800 is moved to its lower position,
  • a cam (see Figs. 1 and 2), similar in contour to the correspondingly designated cam. in the cited patent, is fixed to sleeve 600 of the control device. Coacting with cam 110 is a roller 71! carried on the horizontal armfof abell-crank 172 pivoted, at 113, on the left end of a lever 174 pivotally mounted on frame stud B52. Connected to the pendant arm of bell-crank 112 is a link 820 joined by pin-in-slot connections to a link 82! (see also Fig.
  • a comparatively strong spring 822 extended' between a stud 823 on link 820 and a stud 824 on link 82!, urges zontalmovement, urges-the linkage 820, 82! to 75 the left and, also, tends to maintain a roller l'll in engagement with the cam "0 when the cam is rendered effective to control detail card punching.
  • roller l'lI when roller l'lI is in register with a low dwell of cam 110, as in the case when a comparison is sensed, spring 826 pulls linkage 820, 82I to the left whereby stud 825 rocks arm 8I0 counter-clockwise to prevent the engagement of latching shoulder 8 with stud 8H3 (as in Figs. 1 and 2), and, if stud 805 is momentarily disregarded, permits the engagement of latching shoulder 8I3 with stud 8 I 6.
  • roller III when roller III is in register with a high dwell of cam 110, as in the case when a non-comparison is sensed, bell-crank I12 is rocked counter-clockwise to pull linkage 820, 82I to the right whereby stud 825 rocks arm 8I2 clockwise to prevent the engagement of latching shoulder 8
  • cam 110 In order to render cam 110 effective, means corresponding to those disclosed in the cited patent are provided to select this cam for operation when selective detail card punching is required.
  • a cam lug 111 may be placed at any desired position on a disc 118 which is secured to sleeve 102 of the operation selector mechanism. Then, when operation selector dial I00 is rotated to a position to place a lug IT! in register with a roller "6, carried on the right end of lever I14, lever I14 is rocked clockwise to elevate pivot "3 whereby roller I1 I is moved into operative relationship with cam 110 to render the cam effective for controlling card punching operations.
  • either of three different types of card punching operations may be effected, in accordance with the setting of punch control lever 800, at any setting of the operation selector dial I00 in which a cam lug 111 is placed in register with roller "I16 to render punch control cam 110 effective.
  • the machine may be set to 1. Punch additional data in comparing detail cards and prevent punching of additional data in non-comparing detail cards, or
  • punch control lever 800 is set in its upper position U (Fig. 1A) This setting shifts link I to the right and causes stud 805 to rock arm 0I2 clockwise to maintain latching shoulder 8I3 out of engagement with stud BIB, but tensions spring 8I5 to urge latching shoulder 8
  • a low dwell of cam is in register with roller I1 I, as shown in Figs.
  • punch control lever 800 is set in its lower position L (Fig. 1A). This setting shifts link 80I to the left and causes stud 805 to rock arm 8I0 counter-clockwise to maintain latching shoulder 8
  • a high dwell of cam 110 is in register with roller 11 I.
  • Bell-crank 112 is thereby rocked counter-clockwise to shift linkage 820, Ml to the right to cause stud 825 to rock arm 8I2 clockwise and retain latching shoulder 8I3 out of engagement with stud 8 I 6.
  • shoulder M3 is ineffective to engage stud BIG so that the set pin retract mechanism is free to operate momentarily near the mid-point of each cycle, as described above, to release all previously depressed set pins 500, and to permit the locking of all set pins 500 that are depressed in accordance with each new master card perforation pat- 75 tern.
  • the punch mechanism operates, in the usual manner, to transfer additional data from master cards to non-comparing detail cards.
  • sleeve 600 and cam 110 are rotated, as'
  • Arm H2 is thereby elevated and latching shoulder 813 is engaged with stud M6 by spring 815 whereby shaft 548 is locked in rocked position to retain all locking slides 502 in their rightward positions. Due to the coaction between roller 546 and the vertical face 545 on the arms 542 supporting bail bar 54!, this condition is maintained when the set pin box moves downwardly, and is continued as long as roller IH remains in register with a low dwell of cam 110. Thus, when a comparison is sensed, locking slides 502 are rendered ineffective to lock set pins 500, and the transfer of additional data to comparing detail cards is prevented.
  • punch control lever 800 is set in its intermediate position I (Fig. 1A). This setting shifts link 80
  • the set pin retract mechanism is free to operate momentarily near the mid-point of each cycle, as described above, to release all previously depressed set pins 500, and to permit the locking of all set pins 500 that are depressed in accordance with each new master card perforation pattern.
  • the punch mechanism operates, in the usual manner, to transfer additional data from a master card to a detail card whether there is a comparison or a non-comparison between the designative perforation patterns in such cards.
  • lever 800 when lever 800 is in its intermediate setting, permits the several other cams for controlling card feeding, card sorting, or machine stopping that may be mounted on sleeve 600, as described in the cited differentially their respective operations in the usual mannerwhen comparisons or non-comparisons are sensed, but renders cam 110 wholly ineffective for controlling punching operations even though it may have been selected for operation by operation selector dial 100.
  • punch control cam T10 when lever 800 is set in either its upper or lower position, punch control cam T10 operates conjointly with any selected combination of card feeding, card sorting, or machine stopping cams to effect the desired card handling operation.
  • Fig. 7. group A of Fig. 7, for example, it will be noted that when card sorting control cam 180 is ren-. dered effective by means of operation selector patent, to control a Referring to dial 100, in addition to punch control cam 110 and any desired card feeding control cam, the machine may be conditioned to perform three diiferent operations, corresponding to operations 1, 9, and 21 of Fig. 74 of the cited patent, merely by manipulating punch control lever 800. In the previously disclosed machine, a separate setting of the operation selector dial is required to effect each operation.
  • the present machine may be set to effect operation 1 of Fig. '74 of the cited patent, merely by removing the punch translator.
  • the setting of lever 800 is immaterial and has been designated by an X in Fig. 7.
  • the groups B to I, inclusive, of Fig. 7 indicate the various sets of operations, corresponding to operations described in the cited patent and indicated on Fig. 74 thereof, that may be efiected by manipulation of lever 800 and the punch translator, at a given setting of operation selector dial 100, when punch control cam is rendered effective conjointly with sorting control cam 180 and/or stopping control arm of the cited patent, in each of the several combinational settings of these cams.
  • any one of the several card feeding control cams described in the patent may also be rendered effective to obtain the type of card feeding required in a specific :accounting or statistical. system.
  • the present invention when applied to a statistical card comparing machine of the type disclosed in the cited patent, renders such a machine exceedingly more flexible and capable of performing a substantially greater number of card handling operations.
  • FIG. 3 there is a partial illustration of a typical application of the present invention.
  • operation selector mechanism comprising the actuating mechanism for sleeve 600 and the control cams thereon; operation selector dial M10; punch control cam I'll! and its associated linkage I12, I13, 114, etc., as described hereinabove, including punch control lever 800; card sorting control cam I80 and its associated linkage 182, I83, 184, etc., as disclosed in Figs.
  • a punch mechanism for transferring additional perforation patterns from master records to detail records, a plurality of punch disabling means to prevent the transfer of perforation patterns, means under the control of the comparing mechanism to render one of said punch disabling means ineffective when a comparison is sensed and to render a second of said punch disabling means in- Obviously, any desired combina effective when a non-comparison is sensed, and additional means settable to render said punch disabling means ineffective selectively, regardless of the action of the comparing mechanism.
  • a punch mechanism for transferring additional perforation patterns from master records to detail records, a plurality of punch disabling means to prevent the transfer of perforation patterns, means under control of the comparing mechanism to render one of said punch disabling means ineffective when a comparison is sensed and to render a second of said punch disabling means ineffective when a non-comparison is sensed, and additional means settable to render said punch disabling means ineffective selectively or concomitantly, regardless of the action of the comparing mechanism.
  • a machine for handling master and detail records including a comparing mechanism for sensing comparisons or non-comparisons between perforation patterns in preselected portions of such records; the combination of a punch mechanism for transferring additional perforation patterns from master records to detail records; said punch mechanism including a plurality of set pins selectable under control of the master records, locking slides operative to retain selected set pins in position to effect punching, and means to render said locking slides ineffective momentarily during each machine cycle; a plurality of disabling means to retain the locking slides in ineffective position whereby the transfer of perforation patterns is prevented; means under control of the comparing mechanism to render one of said disabling means ineffective when a comparison is sensed, and to render asecond of said disabling means ineffective when a non-comparison is sensed, and additional means settable to render said disabling means ineffective selectively, regardless of the action of the comparing mechanism.
  • a machine for handling master and detail records including a comparing mechanism for sensing comparisons or non-comparisons between perforation patterns in preselected portions of such records; the combination of a punch mechanism for transferring additional perforation patterns from master records to detail records; said punch mechanism including a plurality of set pins selectable under control of the master records, locking slides operative to retain selected set pins in position to effect punching, and means to render said locking slides ineifective momentarily during each machine cycle; a plurality of disabling means to retainthe locking slides in ineffective position whereby the transfer of perforation patterns is prevented; means under control of the comparing mechanism to render one of said disabling means ineffective when a comparison is sensed, and to render a second of said disabling means ineffective when a non-comparison is sensed, and additional means settable to render said disabling means ineffective selectively or concomitantly, regardless of the action of the comparing mechanism.
  • a machine for handling master and detail records including a comparing mechanism for sensing comparisons or non-comparisons between perforation patterns in preselected portions of such records; the combination of a punch mecha- 75 nism for transferring additional perforation patterns from master records to detail records; said punch mechanism including a plurality of set pins selectable under control of the master records, locking slides operative to retain selected set pins in position to effect punching, and a retract mechanism operative during each machine cycle to render said locking slides ineffective momentarily for retaining selected set pins; a pair of spring urged latches to retain said retract mechanism in operated position whereby the locking of selected set pins is prevented; means under control of the comparing mechanism to render one of said latches inefiective when a comparison is sensed, andto render the other of said latches ineflf'ective when a non-comparison is sensed, and additional means settable to render said latches ineffective selectively, regardless of the action of the comparing mechanism.
  • a machine for handling master and detail records including a comparing mechanism for sensing comparisons or non-comparisons between perforation patterns in preselected portions of such records; the combination of a punch mechanism for transferring additional perforation patterns from master records to detail records; said punch mechanism including a plurality of set pins selectable under control of the master records, locking slides operative to retain selected set pins in position to effect punching, and a retract mechanism operative during each machine cycle to render said locking slides ineffective momentarily for retaining selected set pins;

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Computing Systems (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
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  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US284075A 1939-07-12 1939-07-12 Statistical card comparing machine Expired - Lifetime US2214010A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL68396D NL68396C (en)van) 1939-07-12
US284075A US2214010A (en) 1939-07-12 1939-07-12 Statistical card comparing machine
CH216272D CH216272A (de) 1939-07-12 1940-07-11 Lochkartenmaschine.
GB11624/40A GB542732A (en) 1939-07-12 1940-07-12 Improvements in or relating to statistical card comparing machines

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US284075A US2214010A (en) 1939-07-12 1939-07-12 Statistical card comparing machine

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US2214010A true US2214010A (en) 1940-09-10

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US284075A Expired - Lifetime US2214010A (en) 1939-07-12 1939-07-12 Statistical card comparing machine

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CH (1) CH216272A (en)van)
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CH216272A (de) 1941-08-15
NL68396C (en)van)

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