US2397605A - Machine for making records on statistical cards - Google Patents

Machine for making records on statistical cards Download PDF

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Publication number
US2397605A
US2397605A US569294A US56929444A US2397605A US 2397605 A US2397605 A US 2397605A US 569294 A US569294 A US 569294A US 56929444 A US56929444 A US 56929444A US 2397605 A US2397605 A US 2397605A
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column
slide
punch
punches
record
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English (en)
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Holden Norman Geoffrey
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POWERS ACCOUNTING MACHINES Ltd
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POWERS ACCOUNTING MACHINES Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41B—MACHINES OR ACCESSORIES FOR MAKING, SETTING, OR DISTRIBUTING TYPE; TYPE; PHOTOGRAPHIC OR PHOTOELECTRIC COMPOSING DEVICES
    • B41B25/00—Apparatus specially adapted for preparation of record carriers for controlling composing machines

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  • This invention relates to machines'for making records on statistical cards.
  • the present invention has for its main object to provide an improved form of mechanism for actuating the record-forming elements in a machine for making coded records in either or both halves of each column of a record card which is virtually divided into two halves longitudinally as described above.
  • a further object of the invention is to provide a. machine Which can be used to make coded records in either the upper or lower half of a card, or to make single records each in a vfull column of a card.
  • a machine for making records on statistical cards comprises in combination a column of record-forming elements whereof the elements in one half of the column of elements represent the same data as corresponding elements in the other half of the column, and in an embodiment of the invention now favored such machine comprises a plurality of crossbars each disposed with its ends resting on the upper ends respectively of two corresponding record-forming elements in the column, a pivoted'actuator for each crossbar, each of said actuators resting on its associated crossbar between the ends of the lattenand means for blocking downward movement of either end of each crossbar at will, whereby on depression of any actuator, the blocked end of the associated crossbar serves as a fulcrum about which said crossbar rocks to operate the record-forming element on which its other end rests, the other record-forming element remaining inoperative.
  • the record-forming elements may be in the form of punches for perforating record holes in the cards, and in this connection a presently preferred embodiment of the invention is a machine comprising in combination a column of punches whereof each punch in one'half of the column has the same value as 'thecorrespondingly positioned punch in the other half of the column, a plurality of double-armed levers each having one end resting "on the upper end of a punch in one half of the column and its other end resting on the upper end of the corresponding punch in the other half of the column, a pivoted actuator for each of said levers, each of said actuators resting on the associated lever midway between the ends of "the latter, and means for locking the punches in either half of the column against downward movement at will, whereby ondepression of any actuator the locked punch on which one end of the associated lever rests serves as'a fulcrum about which the associated lever rocks to operate the unlocked punch on which its other end rests.
  • each of the record-forming elements in the column may be provided with an additional pivoted actuator individual thereto and'overlying a projection or shoulder on the associated recordforming elements, and the machine may include means for disabling the blocking means for all the record-forming elements simultaneously, whereby the same machine can be used for recording data by single records (e. g., perforations) each in a full column of (e. g., twelve) index point positions, or by one, or two, records (e. g., perforations) duplicated in the lower and upper halves of a column of (e. g., six) index point positions, or by records of the latter kind in either half column.
  • Fig. 1 is a side elevation of the machine, par-. tially in section, with the base broken away at its ends, and with certain parts omitted, to wit, the actuating bar 20a and the arm I55 shown in Figs. 2 and 7 and the left-hand end portion of the lever 38a, this lever best shown in Fig. 12,
  • Fig. 2 is a plan, partly in section on the line II--II in Fig. 1,
  • Fig. 3 is an end elevation of the machine, partly in section,
  • Fig. 4 is a art section on the line IVIV in Fig. 1, illustrating part of the means for guiding the punches which form the records,
  • Fig. 5 is an exploded View of the punch guide means shown in Fig. .4, I
  • Fig. 6 is a part horizontal section on the line VI-VI in Fig. 1.
  • Fig. '7 is. a perspective view of the punch selecting and actuating mechanism, including the crossbars, g
  • Fig. 8 is a horizontal section on the line VIII-VIII in Fig. 1. certain actuating levers for the punches being omitted,
  • FIG. 9 is a perspective view from the back of the machine showin an interlocking mechanism for certain sett ng slides which serve to control the punch locking means, 1
  • Fig. 10 is a fragmentary plan view of a record card perforated in the upper halves of its colindex point positions in a column of a record card.
  • Each card has 45 columns, each having twelve index point positions, but the card is divided ent specification No. 430,251.
  • Fig; 11 is a view looking down on the two banks of keys provided. with the keyboard plate removed. and showing in d t-and-d sh lines the key bank to the left in Fig. 2. and in full lines the key bank to the ri ht in Fig. 2 and the punch actuating levers operated by the keys of that bank, the several punch carr ers being outlined in top plan in full lines, and the locations ofthe crossbar midpoints laterally of the machine being indicated by dot andedash arro s, v
  • Fig. 12 is a-view similar to Fig. 11, but show ing the punch-actuating levers operat d by the keys of the bank to the left in Fig. 2.
  • Fig. 13 is a detail view, showing in'top plan a ho izontal locking plate, together with certain associated devices. and i Fi 14 illustrates a mod fication of the means for blockin the punches allottedlto either half column of a record card and for then rendering operative the punches allotted to the other half column.
  • the machine comprises a'bedplate I carrying supports 2 across which'is secured, by screws 3, a lower bridge plate 5.
  • the bedplate I carries a die plate 5 having twelve holes 5a therein, and above the die plate a stripper plate 6 formed with twelve corresponding holes.
  • the lower bridge plate 4 is formed with a longitudinal opening 1 (Fig. 5) through which pass the punch carriers. These last are twelve plates 8 each havin a punch 9 de ending from its. lower end. Plates 8 are guided at their upper ends by a comb plate is secured to the lower bridge plate 4 by screws l l and a retaining bar 12 secured to the plate 4 by screws [3. At their lower ends the plates 8 are guided by the passage of the punches 9 through the respective holes in the stripper plate 6.
  • A. spring [4 is disposed around each punch 9 between the stripper plate 6 and the lower edge of the corresponding plate- 8. said springs urging the punch upwardly, and the upward movement being limited by engagement of a shoulder 8a' (Fig. 7) on they plate 8 with the underside of plate 4.
  • Themachine thus includes twelve punches arranged in a column in accordance with the twelve recording the 0 and 9 values alongside each other.
  • each even number-0, 2, 4, 6, 8--is recorded by punching a single hole in the card the odd number 9 is similarly recorded, and the other odd numbersl, 3, 5, '7 and 1l-are each recorded by punching two holes one of which is always the same T punching as for the 0 hole.
  • the number or value and 9 combination is used for recording the num her 11, it is desirableto have the punches for Hence the machine herein illustrated includes six punches for the values 2, 4, 6, 8, 0 and 9 are arranged in that order relative to the index point this bunch, which in these two views is additionally marked A, isthe 2-value punch and the next five punches to the right.
  • ! and the actuating bar 20a rests freely on a pivot pin 2
  • Each crossbar 23 has one end 24 resting on the upper end of a plate 8 in one half column and its other end 25 resting on the upper end of the corresponding plate 8 in the other half column.
  • a crossbar 23 common'to these two plates will have its ends 24 and 25 resting respectively on the left hand plate and the right hand plate, the common crossbar 23 being'operable by the one actuating bar 20.
  • Such crossbar is the one shown to the left in Fig. 7.
  • through which a bar 29 or 20a transmits movement to a cross bar 23 is mounted as follows:
  • the crossbars 23 are mounted side by side in contact and are held in position by two stepped plates 39 and 3
  • Plate 39 is supported on short posts I 6 to which it is attached by screws I! and plate 3
  • is carried by a holder 32 rounded at the bottom to fit a correspondingly rounded depression 33 formed in the upper edge of the -crossbar 23 so that the bar 23 can rock about the centre of the lower end of the member 32.
  • a retaining plate 34 is screwed to the outside face of each of the two outside crossbars of the group.
  • the plates 8 are cut away at the to as indicated, for example at 8b in Fig. '7, to admit the downwardly projecting portion 231; of any crossbar which passes over them, this downwardly projecting portion being provided to strengthen the cross bar in view of the depression 33 formed in the upper edge of the bar 23 to receive the member'32.
  • and the socket 22 in each actuating bar 25 and in the actuating bar 23a is near the left hand end of the actuating bar in Fig. l. and close- 1y adjacent to its left hand end the actuating bar is freely pivoted about a fulcrum pin 35- screwed into an upper bridge plate 31.
  • the fulcrum pin 35 is rounded at its lower end and enters a socket 36 in the upper edge of the bar.
  • each of the five bars 20 (corresponding to the digits 2, 4, 6, 8 and 0, respectively) is provided with a key lever 38 (Figs. 2 and l2)'1oosely pivoted on a shaft 39 (Figs. 1 and 2) mounted in bearings 40 projecting upwardly from the upper bridge 31, each key lever 38 having a key stem 4
  • Each key lever '38 also has a downward nose 43 (Figs.
  • the key 42a bearing the numeral 9 is similarly connected to a key lever 38a freely mounted onthe shaft 39 and carrying a pin I50 (Figs. 2 and 12) overlying the 9 actuating bar 20a.
  • a pin I50 Figs. 2 and 12
  • Each of the five keys 42b bearing the numerals "3, “5, “7, and “11 is similarly connected to a key lever 38b freely pivoted about the shaft 39 and carries a pin I5I. Each of these pins overlies a step I52 in one of five collars I53 (Figs. 2 and 7) fixed to the shaft 39.
  • Each key lever 3812' also carries a pin I54 overlyingthe actuating bar 26 which is directly actuated by the key 42 bearing the next higher even number, i. e., the key lever 38b of the "1 key 42b carries a pin I54 overlying the bar 20 for operating the 2-value punclnand so on.
  • the lever 38b of the "11 key 421) however, carries a pin I54 overlying the bar 20 for operating the O-value punch.
  • an arm I55 Secured to the shaft 39 is an arm I55 carrying a pin I56 overlying the bar 2041 for operating the 9-value punch.
  • Each lever 38b carries a depending lug 38c and these lugs together with a similar lug I550 act as guides for the ends of the bars 20, 20a.
  • the upper bridge plate 31 is supported (Figs. '1 and 3) by four posts 44, one at each corner, standing up from the supports 2.
  • each slide also carrie'sa 'pin 51 guiding a spring 58 and passing through a plate 59 screwed-to the outside of the right hand support -2 which is cut away at 69; Fig. 8, for the purpose described below.
  • the springs 58 are compressed between the end of the slide and the inside of the plate 59.
  • the slide 59 has six teeth 6
  • is the same as the pitch of the punches 9 and by displacing the slides longitudinallyv each slide can occupy a left hand, or effective position, or a right hand, or ineffective position.
  • the slides are provided with an interlock as hereinbelow described, by means of which when one slide is set in the effective position the other slide is set in'the ineffective position and vice versa. and if for example the slide 50 is moved to the right hand end of'its travel (Figs.
  • this plate 8 will serve as a fulcrum for the right hand end 25 of bar 23 which will consequently rock counterclockwise about this end, and its left hand end 24 will depress the plate 8 in the left hand half column which carries the punch 9 additionally marked A, thereby perforating a card with a hole in the ,2 value position in the left hand half column. 7 V
  • the setting slide HI- is controlled by a key 89 (Figs. 1, 2 and 9) attached to a key 'steinBl passing through a slot 92 in a plate 83 supported by four posts 84 extending upwardly. from the upper bridge plate 3
  • (Fig. 9) is cut away to form acam face 85, the reduced end 86 of the stem passing through a slot 8! in the plate 14, this slot also extending through the plate 81 beneath.
  • a guide. 88 is provided which bears against the rear face of the key stem.
  • This guide 88 is constituted by a lug bent off from a strip 89 secured at 99.
  • a key 92 having a key stem 93 is provided, the keystem 93 being cut away at its lower end to form a cam face 94 and being guided in the same manner as key'stemsl.
  • the key stems BI and 93 are urged upwardly by means of springs 8 la and 9341 respectively, the
  • the key stem 93 In order to disable the punches in the upper half column when thekey 92 is depressed the key stem 93 carries an arm I05 having. a depending lug I06 disposed above the tail of the latch 91 for the slide I0 so that when key 92 is depressed the lug I06 rocks latch 91' to release the slide which is moved to the right in Fig. '7 by its spring 96 (Fig. 9) thereby'moving lug 69 away from the upper end of lever 66.
  • Spring 58 (Figs.
  • carries an arm I0-1 having a lug I08 depending above the tail of the latch I02 for the slide 12 so that on depression of the key 80 the lug rocks the latch I02 to release the slide 12 thereby permitting the spring 58a to push the slide 5I to the left and thusbring the teeth 62 under the plates 8 of the lower half column so that these plates-serve as abutments about which the cross bars 23 rock to actuate the punches 9 in the upper half column.
  • each of the twelve punches 9 in the full column may be provided with an independent actuating lever IIO controlled from a corresponding one of a bank of twelve additional keys I I I I.'
  • Each of the actuating levers H0 (Figs. 1, 2,11 and 12) is connected. to the stem IE2 of its key III by a loop II3 formed at the end of the lever H0 and embracing a reduced portion I'M'of the key stem. See in this connection the key stem H2 at the right in Fig. 1, and the 1 key III in Fig. 11.
  • each lever H0 at its forward end has a depres-- sion 5 in its upper edge which is maintained in engagement with a pivotpin I-IG by a bracket I I1 screwed to a plate '8 depending from th edge of the lower bridge-plate 4.
  • Each key lever IIO overliesa pin H9 (Figs. 3, 9- and 11) projecting from the side of the plate 8 carrying the associated punch so that, assuming the punches to be free to move, depression of any of the additional keys II I willcause operation of the corresponding punch 9.
  • a third control key I20 for the slides 10 and 12 is provided as shown best in Fig. 9.
  • the stem i2! of this key is guided in a manner similar to that described for thekey stem BI and the lower end of this key stem I2I is cut away to form a cam face I22 wide enough to overlap shoulders I23 and I24 on both slides 19 and 12 simultaneously.
  • a bail I64 Freely mounted on a shaft IE3 is a bail I64 carrying near its centre alug I651which is engaged I by a tail I56 projecting from a small adjustable 7 plate Ififia '(Fig. 8) having two slots lfifib for screw securementto the bail plate I56.
  • the bail ie l'co'r corresponds to the horizontal 7 part of the angle plate I1 described in British patent specification No. 430,251, and carries a pin I 61 bearing on an arm' I68 by means of which the escapement 'pawl IE9 is operated.
  • the parts I61, I68,-and I69 correspond to the parts 29c, 29
  • of the slide Elland the teeth 62 of the slide i may be disposed on a single locking slide disposed along one 7 side of the column of punches 9.
  • a single slide'l15 is shown as longitudinally shiftable on fixed parts I16,"I16 of the machine and as carrying along itstop a group of teeth I11, correspending to the teeth GI, and also a group of teeth I18, corresponding to the teeth 62.
  • the group of teeth I18 are displaced along theslide, from thegroup of teeth I11, by a distance equal to half the pitch of the punches 9, so that, when the slide isat one end of its travel, the teeth I11 will be disposedbelow the plates 8 in the one half column while the teeth I18 are in between the plates 8 of the other half column, whereas when the slide is moved to the other end of its travel the teeth I11 will bebetween the plates 8 in the one halfcolumn, and the teeth I18 will be below the plates 8 in the'other half column.
  • the plates 8 and punches! are indicated in Fig. 14 in dotdepress the corresponding punch in the other halffcolumn in th 7 above.
  • The'single locking'slide maybe biassed to one a of its extreme positions by means of a spring I80, and a key I8I may be provided to displace it-to the otherposition, a latch device I82,releasable on actuation of another key I83, being provided to retain the slide in the position to which it has :been set by the first mentionedkey.
  • the keys .I8I and I83 are shown as provided with conven- V tional return springs I84 and I85 respectively.
  • the 7 latch I82 which includes a tooth tee the slide and a dog I9! fixedly pivote'd at 192', would look the slide as thus s'hifted,ifollowing clockwise rooking of the dog by thelto'oth' I90 during movement of said tooth to'the' left, at the conclusion of which movement the spring I85 would cause the do to drop behind the tooth I98. With the parts so arranged, the slide I would be returned to V th position shown on depression of the key I33,
  • Constructions according to the invention in V which means is provided for unlocking all twelve 7 parts lengthwise, or for'punching data in the r punches in the column simultaneously or for locking the six punches in either half column at will have the advantagethat 'asingle machine can be used for punching standard (e. g.,; column) cards or for punching data in the upper half of-a standard card which is divided into two lower half of such a card.
  • standard e. g.,; column
  • the record forming elements may be arranged to impress the records on the cards in other'ways, e; g., by printing spots, or making electro-conductive marks on the cards.
  • WhatIclaim is: r s r 1.
  • the combination of a column of record-forming 7 bar serves as a. fulcrum about which said cross-.
  • a column of punches whereof each punch in one half of the column has the same value as the cor respondingly positioned punch in the other half of said column
  • a plurality of crossbars each having one end resting on the upper end of a punch in one half of thecolumn and its other end resting on the upper end of the corresponding punch in the other half of the column
  • an actuator to each of said crossbars each of said actuators resting on itsassociated crossbar midway betweenthe ends of,the latter, and means for looking all the punches in either half of the column against downward movement at will, whereby on depression of any actuator, the locked punch on which 7 one end of a crossbar rests blocks said endof said crossbar against downward movement and thereby serves'as a fulcrum about which said crossbar rocks to operate the unlocked punch on which its other end rests.
  • a machine for making statistical records the combination of a column of record-forming elements whereof the elements in one half of the column representthe same data as the corresponding elements in the other half'of said column, a plurality of crossbars each disposed with its ends resting on the upper ends respectivel of two corresponding record-forming elements in the column, an actuator to each crossbar, each of said actuators resting on its associated crossbar between the ends of the latter, means for blocking downward movement of either end of each crossbar at will, an additional .actuator to each of said record-forming elements, and means for disabling the blocking means for all the crossbars simultaneously whereby the same machine can be used for recording data by single records each in a full column of index point positions, or by combination records in either a lower or an upper half column.
  • each punch two groups of locking abutments, and means for moving the locking abutments, in one group under the abutments-of the punches in one half of the column while moving the locking abutments of the other group clear of the abutments of the punches in the other half of the column and vice versa.
  • a column of punches whereof. each punch in. one half ofthe column has thesame value asv the correspondingly positioned punch in the other half of-said' column, a plurality of crossbars, each having one end resting on the upper end of: a punch in one half of the columnand. its other end resting on the upper end of the corresponding punch in the other half of said column, an actuator to each of said crossbars, each of: said actuators resting on its associated crossbar midway between the ends of the latter, an abutment on each punch, two groups. of locking abutments, means for moving the locking abutments.
  • a machine for making statistical records the combination of a column of record-forming elements whereof the element in half of the column represent the same data as corresponding elements in the other half of the column, a plurality of crossbars each disposed-with its end resting on the upper ends respectively of two corresponding record-forming elements in the column, an actuator to each crossbar, each of said actuators resting on its associated crossbar between the ends of the latter, a locking slide for the record-forming elements in one half of the column, a locking.
  • a machine for making statistical records the combination of a column of record-forming elements whereof the elements in one'hal'f of the column represent the same data as correspond-ing elements in the other half of the column, a plurality of crossbars each disposed with its end-s resting on the upper ends. respectively of two-cor-' responding record-forming elements inthe column, an actuator to each crossbar each of said actuators resting on its associated crossbar between the ends of the latter, a locking slide for the record-forming elements in one half of the column, a locking slide for the record-forming elements in the other half of the column, an abutment on each of saidrecord-forming.
  • the abutments in each half column being disposed over the respective locking slide, teeth on each locking, slide'spaced apart along said slide by amounts equal to the spacing of the abutments in the respective half column, means for moving one looking slide to bring its teeth into register with the abutments in the respective half column 7 and the other locking slide to bring. its teeth out of register with the corresponding abutments, and
  • each of'saidactuators resting on itsassociated crossbar midway between the; ends of the latter, an abutment on each record-forming vele- 'ment, a locking slide to each half column, each of vice Versa, an additional actuator to each of said Y record-forming elements and means for positioning both locking slides with their teeth out of register with the respectiveabutments.
  • a column of puncheswhereof each punch'in one half of the column has the same value as the correspondingly positioned punch inthe other half of the column, a plurality of crossbars, each having one end resting on therupper end of a punch in'one half of the column and its other end resting on the upper end of the, corresponding punch in the other half of'the column, an actuator to each of said crossbars, each of'said actuators resting on its associated crossbar midway between the ends of the latter, a locking slide for the punches in one half of the column, a locking slide for the punches in the other half of the column, an abutment on each punch, the abutments in each half column being disposed over the respective lockin slide, teeth'on each locking slide spaced apart along said slide by amounts equal to the spacing of theabutments in the respective.
  • each of said crossbars each of said actuators rest-H said locking slides having teeth disposed thereon for co-operation with the abutments on thereoord-forming elements in the respective half column, a spring to each locking slide each of, said springs urging their respective slides into an effective position in which their teeth are disposed below the abutments of the record-forming elements in the respective half column, an actuating member individual to'each locking slide for movingfsaid locking slide to an ineffective position against the action of its spring, a latch for retaining each locking slide in the inefiective position when moved thereto, and releasing means for each latch, each of said releasing means being operable by the actuating member for the slide associated with the other of said latches.
  • V 12 In a machine for making statistical records thecombination of a column of record-forming elements whereof the elements in one half of the 'column represent the same dataas correspond-1 ,ingly positioned elements in the other'half. of the l 7 7 means for'positioningboth locking slides with 1 their teeth out of register with the respective;
  • a column of record-forming elements whereof the elements in one half of the column represent the same data as correspondingly positioned elements in the other half of the column, a pluralit of crossbars each disposed with its ends resting on the upper ends respectively of two corresponding record-forming elements in the column, an actuator to each crossbar, each of said actuators resting on its associated crossbar midway between the ends of the latter, an abutment on each record-forming element, a locking slide to each half column, each of said locking slides having teeth disposed thereon for co-operation with the abutments on the record-forming elements in the respective half column, a spring to each locking slide, each of said springs urging their respective slides into an effective position in which their teeth are disposed below the abutments of the record-forming elements in the respective half column, a, setting slide individual to each locking slide for moving said locking slide to an ineifective position against the action of its spring, an actuating member individual to each setting slide, each of said
  • a column of record-forming elements key operated means for actuating all said elements and including a plurality of keys and a plurality of wholly mechanically acting operative connections between each of the keys and a different one of said elements, wholly mechanically acting devices each for actuating a different record-forming element in a part of the column and for simultaneously actuating a record-forming element having corresponding placement in another part of the column, a second key operated means including said devices and a second plurality of keys and wholly mechanically acting operative connections some of which are each between a different one of some of the lastnamed keys and a different one of said devices and others of which are each between a difierent one of others of the last-named keys and a different plurality of devices, and means for at will disabling said devices relative to the record-forming elements of one or the other part of the column.
  • a column of record-forming elements key operated means for actuating all said elements and including a plurality of keys and a plurality of wholly mechanically acting operative connections between each of the keys and a different one of said elements, wholly mechanically acting devices each for actuating a different record-forming element in a part of the column and for simultaneously actuating a recordforming element having corresponding placement in another part of the column, a second key operated means including said devices and a second plurality of keys and wholly mechanically acting operative connections some of which are each between a, different one of some of the last-named keys and a difierent one of said devices and others of which are each between a difierent one of others of the last-named keys and a different plurality of said devices, means for disabling said devices relative to the record-forming elements of one or another part of the column, and means for disabling said devices relativeto all the record-forming elements of the column.
  • a column of recordforming elements key operated means for actuating all said elements and including a plurality of keys and a plurality of wholly mechanically acting operative connections between each of the keys and a different one of said elements, wholly mechanically acting devices each for actuating a different record-forming element in a part of the column and for simultaneously actuating a record-forming element having corresponding placement in another part of the column, a second key operated means including said devices and a second plurality of keys and wholly mechanically acting operative connections some of which are each between a difierent one of some of the lastnamed keys and a different one of said devices and others of which are each between a different one of others of the last-named keys and a different plurality of said devices, means for looking the first-named plurality of keys, means for disabling all of said devices, and means responsive to operation of the disabling means for releasing the locking means.
  • the combination of a column of punches means operable to actuate any selected one of the punches, for straight punching, means for preventing operation of the first-named means, means operable to actuate any selected one or any selected plurality of the punches in a part of the column, for code punching, means operable at will for disabling the second-named means, and means responsive to operation of the disabling means for rendering the first-named means ineffective.

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US569294A 1943-12-17 1944-12-14 Machine for making records on statistical cards Expired - Lifetime US2397605A (en)

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GB21240/43A GB570356A (en) 1943-12-17 1943-12-17 Improvements in or relating to machines for making records on statistical cards

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729289A (en) * 1951-11-17 1956-01-03 Maul Michael Keyboard operated multi-deck record perforating machines
US6622908B2 (en) * 2000-01-19 2003-09-23 Daido-Kogyo Kabushiki Kaisha Punch machine
US20030177878A1 (en) * 2002-03-20 2003-09-25 Yang Chia Hsiang Sequential punch press with complementary sliding plates

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729289A (en) * 1951-11-17 1956-01-03 Maul Michael Keyboard operated multi-deck record perforating machines
US6622908B2 (en) * 2000-01-19 2003-09-23 Daido-Kogyo Kabushiki Kaisha Punch machine
US20030177878A1 (en) * 2002-03-20 2003-09-25 Yang Chia Hsiang Sequential punch press with complementary sliding plates
US7086582B2 (en) * 2002-03-20 2006-08-08 Hon Hai Precision Ind. Co., Ltd. Sequential punch press with complementary sliding plates

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DE932279C (de) 1955-08-29
FR916701A (fr) 1946-12-13
GB570356A (en) 1945-07-03

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