US1856737A - Punching or like machine - Google Patents
Punching or like machine Download PDFInfo
- Publication number
- US1856737A US1856737A US384601A US38460129A US1856737A US 1856737 A US1856737 A US 1856737A US 384601 A US384601 A US 384601A US 38460129 A US38460129 A US 38460129A US 1856737 A US1856737 A US 1856737A
- Authority
- US
- United States
- Prior art keywords
- carriage
- striker
- key
- movement
- card
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004080 punching Methods 0.000 title description 30
- 230000007246 mechanism Effects 0.000 description 30
- 238000010276 construction Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 6
- 210000003811 finger Anatomy 0.000 description 6
- 230000000994 depressogenic effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 210000003414 extremity Anatomy 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 206010000060 Abdominal distension Diseases 0.000 description 1
- 241000219171 Malpighiales Species 0.000 description 1
- BFPSDSIWYFKGBC-UHFFFAOYSA-N chlorotrianisene Chemical compound C1=CC(OC)=CC=C1C(Cl)=C(C=1C=CC(OC)=CC=1)C1=CC=C(OC)C=C1 BFPSDSIWYFKGBC-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41K—STAMPS; STAMPING OR NUMBERING APPARATUS OR DEVICES
- B41K3/00—Apparatus for stamping articles having integral means for supporting the articles to be stamped
- B41K3/36—Apparatus for stamping articles having integral means for supporting the articles to be stamped with means for deforming or punching the copy matter
- B41K3/38—Apparatus for stamping articles having integral means for supporting the articles to be stamped with means for deforming or punching the copy matter separate from the stamping means
Definitions
- rl ⁇ his invention relates to a punching inamon striker operated mechanism which actuchine for record cards or the like and has for ates a punch by a light selecting bar being inits object to accelerate the action of punching terposed betweenk the striker and punch by a machines and in the case of hand operated key.
- T us instead of it being necessary to perforating machines for record cards, for inake rigid punch operating levers connectinstance, as used in statistical machines, to ing the individual keys to their respective provide a construction in Which the key touch punches, it is only required to provide a light is made more suitable for an operator, errors Connection from the key to the punch and the are substantially eliminated, and it is cheaper care necessar in the construction of the actuto manufacture; at the same time to provide al punching' mechanism can be concentrated ce a punching or perforating machine in which 0n 'the common mechanism with its single the card is visible immediately before punchconnection.
- lGIi 1S employed the keys need not directly A method of operating punches of a card Operate the Selector bars but may operate inpeyfomging machine according t0 the inventermediate members so that the control from 70 tion consists in transmitting eort to the the key t0 the Selector may pass through a punches from an actuating member during large angle, as for example, a right angle, as one movement in one direction thereof, so that hereinafter mOie particularly described.
- the punching and return stroke of the is so designed that 5 punches are effected during one stroke of the llllld'lut-ely after the commencement of its 7 actuating member.
- tie path of the selector rEhe invention further consists in a method MS liOt Operated, thereby the machine is of Opel-aging punches of a Card performing locked against a. subsequent operation until machine wherein eort is transmitted to the the lCCUIt @Ompletion of the striker With- ;ao punches from a striker by interposing a light ClIW-l Stmk@ s0 selecting member in the path of the striker, COHVGIHGIltly, the Striker is mounted on a and preferably the striker is reciprocated lClPPOCLtlIlg member positively moved byeiforttransmiited from an actuating meinhlfOUg'h 21- Cpuiplete reciprocation, i. e., to bm, dwing one movement in on@ direction strike and Withdraw during one movement in Cii only whereby a maximum speed for the strik- 011 ClrGCtOli Of an
- a quick resetting of the actuating member may be an intermittently machine, is attained, and the Whole of the rotated member operated by a paWl at predeperiod of the return stroke of the key is avail-A teluined intervals, or it may be in the form able for the travel of the card to the next posio a reciprocating member, in the latter ease e H01L in accordance with the invention the complete 99 A record card punching or perforating operation of the striker is attained during the machine operating according to the present movement in one direction of the reciprocatinvention includes means for operating at ing member.
- the striker may be carried es common to all the punches on the interposiby the sheath of an eccentric rotated through tioning between the striker and the corre- 8 0 by means of a paWl and ratchet device.
- the pawl may have tivo operative faces and by selector mechanism.
- Supposing the sethe ratchet co-operating lateral abutments lector mechanism comprises a keyboard for e. g.
- the eccentric may be driven by means of a pinion, connected in the manner of a free Wheel to the eccentric, the actuating member in this case being in the form of a. rack, the free Wheel connection permitting an inoperative return stroke of the rack immediately after a punching operation.
- the punches are arranged vertically and of sufficient Weight, they may be permitted to fall by gravity alone on the Withdrawal of the striker, but in order to assure as rapid as possible a clearing ofthe punch from the card the striker is caused to positively return the punch immediately after a punch operation.
- the punches maybe freely sliding members each formed with aheador some other lug or projectiomwhicli may be adjustable on the punch, the strikerV being formed to embrace the head or equivalent projection to positively impart the Working and Withdrawal strokes of the punches.
- the striker in its upstroke enga-ges the projected end of a selector b'ar, pushes this selector bar up with the respective punch for a distance necessary to assure the punching operation bythe punch and .then pulls down the punch and the selector bar back to initial positioinand thereafter the selector bar is Withdrawn again to resetting position when the operating key for the bansupposing a key action is employed-Would be reset as hereafter eX- plained.
- the bar is initially horizontal during the striking movement, its free end is moved upwardly withy the striker.
- the selector bar may be hinged at its end further aivay from the striker.
- the selector bar could be a reciprocal member with the end which is introduced betweenthe striker and its'respectiye punch as an articulated extremity to the selector bar.
- the selector bar may be flexible to permit the distention during the operation of thes'triker.
- a punch operating mechanism is preferably used in combination With a key action carriage for feeding cards to the punch step by step between the punching operation.
- the combination may be characterized by a key action effecting the interpositioning of a light selector between the striker and punches, as hereafter particularly described.
- Y y s With such an arrangement a novel method of operating punches obtains, such method being characterized by the fact that the Whole of the operation of perforating the card and withdrawing the punch from the hole is completed in the down stroke of a key, and the Whole of the period of the return stroke of the key is available for the travel of the card to the next position.
- An apparatus including in combination punch operating mechanism according to the. inyention and a key action carriage for feeding cards from the magazine tothe punch preferably includes a picker ctr-.ated by the carriage t'o'mve each cart. separately from the vmagazine to the carriage.
- the keys may be formed with actuating cams adapted to positively push and retract the light selectorfbars from into and out of selecting position for the punches.
- a combined card feeding and punching mechanism wherein a key action carriage is employed for feeding cards to the punch, the key action is preferably utilized'to operate the striker of the punch mechanism so that the punches are operated and Withdrawn on the depression of a key, thereby the period of return stroke of the key is available for the movement of the carriage With the card through the next step'permitted by the key action ready for the depression ofthe next key and the next consequential punching operation.
- the key action'operating the escapement of the carriage produces the engagement of the check and actuating paivls with the carriage rack thereby positively rriage rigidly during a puncl holding the ca ing operation.
- Vto a resetting position meant, so far as regards 'key action or key operated mechanism, the position ofthe Vparts before any key is depressed.
- the keys of the key action may be arranged in rows, each key of a rou' freely engaging aspring controlled rocking lever cointo the row, the said rocking levers being mon connected to the striker gear.y thereby on the depression of Aany key thestriker is operated. and the other keys are rendered inoperative.
- Thesaid spring controlled rocking lever may directly operate the pay'vl or rack, Whichever is 'employed of the striker actuating gear, or
- rlhe punches are preferably aligned in a column by a narrow die plate slotted transversely for the introduction of cards for a punching operation whereby only a column of the cards being punched is obscured from view and the punch support may be formed with a guide, e. g. in the form of a die or slot, for the card feeding carriage assuring correct vertical setting, the carriage preferably being also formed with a. circular slide moving in a. bearing assuring horizontal setting of the carriage, thereby assuring correct presentation of a card to the said apparatus assuming the card is accurately presented to the carriage.
- a guide e. g. in the form of a die or slot
- F ig. 1 is a perspective view showing the complete machine parts, being broken away for the sake of clearness;
- Fio. 2 is an end elevation of the machine the parts being in inoperative position
- Fig. 3 is a similar view to Fig. 2, only such parts being included as to show the striker raised as ay result of a key operation and a punch displaced;
- Fig. 4l is a side elevation of the parts in the position shown in Fig. 3;
- Figs. 5, 6, 7 and 8 are detail views showillustrated in Figs. l, 2 and 9;
- iO. 9 is a front elevation of the machine illustrated in Fig. 1;
- Fig. 10 is a rear elevation thereof.
- Fig. 11 is a plan view.
- Fig. 12 is a perspective view showing the modified arrangement for operating the light bars, and a modilication of the light bar construction
- Fig. 13 shows in perspective view a modied arrangement for operating the striker
- Fig. 14 shows a further modification of such arrangement
- Figs. 15, 16 and 17 show in diagrammatic elevation a plan and end view respectively, still further modified arrangement for operating the striker from a key action;
- Figs. 18 and 19 are a perspective view and sectional elevation of a modified form of dog for use with a skip mechanism
- Fig. ⁇ 2O is a front elevation of the carriage; of which ig. 21 is an end view, the parts of the car- ⁇ riage being' in non-gripping position;
- Fig. 22 is a rear elevation of the carriage showing the parts in gripping position
- Fig. 23 is an end view thereof
- Fi 2stA is a central sectional elevation taken on the line XX1V-XXIV of Fig. 10;
- Fig'. 25 is a fragmentary rear view of the card magazine showing the cradle collapsed for the reception of a batch of cards;
- Figs. 26 and 27 show in diagrammatic ele vation and plan respectively a modified arrangement employing picker mechanism for removing cards from the bottom of the pile.
- a vertical support 1 is pro vided for the punches P, the support including two horizontal guide bars 2 and 3 one for each end of the punches, and above the guide bar 2 a narrow die plate 4f.
- the upper guide bar 2 and the die plate l may be formed integrally by slotting transversely a bar so as to provide the necessary opening between the guide and the die plate forL the passage of a card after a punching operation.
- the die plate and guide are relatively adjustable so that the opening between them be varied.
- he punches P are loosely disposed within the guide bars 2 andv 3 and at their lower ends are provided with a bush or ring to form on each punch a head Under each punch P is disposed the extremity of a light selector bar B.
- the striker S is in the form of a vertical plate mounted for reciprocation between pairs of guides indicated at 5 and 6 formed on the support 1 hereinbefore referred to.
- he upper part of the striker is slotted as indicated at 7 for the reception of the end of a light selector bar B so that on an upstroke of the striker S the interposed bar B is struck up and also the punch P whose head overlies the interposed bar.
- the slot 7 of the striker S is large enough to permit the necessary travel of the punch to effect a punching operation, and the upp r part S of the striker though clear of the heads during an upstroke engages the heads on the downstroke of the striker and definitely pulls back the previously displaced punch to normal position, and as hereafter more fully explained the respective key, which causes the bar B to be interposed between the striker and the respective punch, is reset.
- the actuating member R is provided with an adjustable abutment by which the escapement mechanism of a card feeding carriage employed in the apparatus and hereafter particulariy referred to, is operated when a key member is depressed cansino ⁇ displacement of the actuating member R the escapement mechanism including T-shaped member 33 provided with a shoulder 34 which is engaged by the abutment 32 on the actuating member R and a. nose 35.
- roC 25 a shoulder is formed for engagement by the nose and the lever 33 to effect the movement of the rod 25 and reverse movement of the linger 24 to permit or cause a downward movement of the striker.
- Figs. 5 to 8 show the progressive positions from the lifting of the striker to the release of the striker to permit it to fall.
- Fig. 5 shows the trip 29 just to engage the' tail 23
- Fig. 6 shows he c mpleted movement of the striker lifted, 'ie trip just engaging the pin 37.
- Fig. 7 he defiection of the trip member from 23 of the striker lifting gear by enof the pin 37 and the engagement rer lifting gear the nose of the Fig.
- the striker may be carried by the sheath of an eccentric 39 as shown in Fig. 13 mounted on a rod 25a on which is carried a pinion 40 in mesh with a ratchet 4lactuated by a pawl 42 connected to the actuating member R of the striker.
- the pawl preferably has two operative faces 43 and 44 and the ratchet is provided with lateral abutments as for example pins 45 disposed so that the movement of the ratchet communicated to the striker through the eccentric 39 is effected by a variable effort which is lat a maximum at about half travel of the ratchet.
- the face 43 lirst engages a pin 45 and then the effort is transmitted to the face 44 which o crates at a shorter leverage, so that the linal part of the step movement of the wheel will have greater force, that is to say, that the striker will be moved first of all gradually up with the selector barV and punch and during the movement of striking will be given a maX- imum effort which also is utilized to withdraw the striker.
- the member R is connected to a lever 33 of the escapement mechanism so that the tension in the carriage can be utilized to assure returnof the actuated member R: for one forward moveare indicated at Without effecting ment ofthe member R the eccentric is turned through an angle ot 36()o and the sheath reciprocated so that the striker' Sis raised and lowered.
- the eccentric is initially set so that the actuating member commences the movement of the eccentric by applying eiiort at the maximum leverage.
- abraking lever 46 may be disposed inthe path ot' a lug 47 on the paWl 42 sothat the rockingzot the member 46 under the movement of the ratchet is opposedby the pawl member itself throughout travel ot the paWl and the: ratchet.
- a lear ⁇ spring 46av is employed to engage against the pins and so oppose the movement of the paivl 42 thereby an evenness, ot motion is obtained.
- the. actuating member Ris in the form ot1 a rack the teeth ot which 43 and the, rack isv integral Withthe part 23 connected to the levers 21 actuated 'through the keys.
- a spindle 25a isL provided as in the construction shown in Fig'. 13 with an eccentric 39fand on the eX- tremity is a pinion 40e which engages with the. teeth 43 o'lthe rack actuating member, the. rack having su'liicient teeth sovthat in one direction ot movement impelled by depression ot akey the rack causes a rotation ot the corresponding rotation ot y the eccentric through 3600 thereby the striker is lifted and Withdrawn.
- The-rack is connected to the pinion 40a by means-ot'what may be termed a tree Wheel construction to permitthe return of the rack the punches. Instead ot' the rack a toothed Wheel or quadrant may be employed as will be understood in the art;
- the tree Wheel'construction is obtained by cutting the teeth of the pinion ot gradually increasing length from a minimum to a manimum so as to have a proveot helical form clearly shown in Figs. 16 and 17 to engage with the end Jface of a bush 49 carried on the rodm, the face ot which bush is cut also in the manner ot heliX.
- the carriage C has in the usual manner a carriage rack 52 and an extension 53 torming' an anchorage 54 ior a cable connection 55 to a spring controlled drum 56 on which the spring isindicated at 57, this beingthe carriage tension.
- rl ⁇ he escapement includes the T member 33 which is pivoted at 58 on the trame ot the machine and carries a pin 59 which engages'with the check pavvl 60 virtually pivoted at 61 on the trame ot the machine.
- this operating the is effected by connecting thel loyver arm of the bell crank 63 to a link 66 by means of a pivot pin 56a to the plate 27 of the striker actuated mechanism, which plate is connected to the actuating member R as aforesaid, consequei D actuating' member R berating the lever 33 and moving the check paul also actuates the lever 63 through the agency of the plate 2i' and ting pavv'l @el to engage the he same time, all this being effected 'when the key is fully depressed, the carriage meanwhile being momentarily held by this actuating paivl, thereby the car ia-ge is rigidly held during the punching operation.
- the described arrangement of and actuating paWl and their control has the advantage also that should for any reason the carriage stick in its step by step progress the actuating paWl cannot be engaged with the carriage rack, hence the key cannot be depressed.
- the reason for using the T lever being to simplify the construction of skip mechanism -tvhich comprises the thumb plate or finger plate 69 on the end of the T piece away from the check paivl.
- rlhe carriage may also be skipped through predetermined intervals through the check paivl the T lever 33 any bell cra-nk agency i i frame of the machine, tl
- This movement of the scale bar is com municated by the lug 78 to a rocking lever 79 engaging a lug S0 on the T lever 33 that the rocking of the. scale by the depression of the skip key causes Jhe lug 78 to move upwardly and to depress the clear end of the T lever and consequently the lifting of the check pawl 60.
- the carriage may also be moved along at intervals of one tooth without moving selector bar B.
- a spacing hey 8l is employed which engages 'on' the rocking lever 19 so that the actuating member R is moved and consequently the check pawl raised and the actuating pawl simultaneously operated to control the movement of the carriage through one tooth space.
- Figs. 18 and 19 modified form of dog is indicated at 70a.
- the dog is of plat-e form and recessed on its underside as indicated at S2 afd the graduated scale member v73 accordingly need be slotted only on the upper side. rlhe dog is dropped into position and gripped thereat by the spring as indicated at 83.
- a carriage is employed as described and claimed in co-pending application of Arthur Thomas and Ititchard Fitz Fewer, Serial No. 384,602, iil d August 9th, 1929, the carrige comprising, as shown in Figs. 20 to 23, pivoted grippcrs 100 in form triangular plates pivoted at their apices indicated at 101, each gripper being controlled lisy a spring 102 so that one base corner is pulled towards an abutment 103 so that a cartL may be gripped between the grippers 100 and the abutment.
- the carriage In forni the carriage resembles a plate on edge and these grippers are in parallel relation therewith.
- the grippers are controlled by a common trip bar 104 whi h when moved in the direction of the arrow 105, Fig. 22, moves the grippers to operative position.
- the trip bar is pivotally connected at one and bottom of end, see 104e, to a bell crank member 106 and atthe leading end is associated Vwith a s )ring detent 107 carrying a pin 107 a passing through the carriage and provided with a spring 1075.
- the bell crank 106 moves over a stop 108 carried on the frame of the machine.
- the bell crank 106 is spring controlled as indicated at 109 and is mounted with an end plate on its pivot so that as the carriage moves to the end of its travel the bell crank is deflected and wiped past the stop 108, it then becoming disposed so as to pass over the stop immediately after the return movement of the carriage commences.
- the bell crank rides over the stop and is raised, consequentially moving the trip bar in opposite direction to the arrow 105, Fig. 22, thereby causing the grippers to move away from the abutment 103 so that a card X is free to fall therefrom, the grippers being then in open position as shown in Fig. 20.
- register pin 110 On the support 1 of the machine is a pin termed register pin 110, most clearly shown in Fig. 2. this pin being spring controlled and operable through the agency of a rocking plate 111 clearly shown in 1 and 2.
- the support 1 of the punches is formed with a slot 11.2 ⁇ see Fig. 2. which provides a positive guideway for the carriage, the part 53 of the carriage riding in the bottom of the slot.
- the carriage C is perforated as indicated at 113, Figs. 20 and 22, soy that the detent may be pushed away from abutment with the trip bar 104.
- the register pin on the support is located with regard to the punches P so that unless the carriage is pulled right home on the return journey the pin cannot pass through the carriage and engage the detent, whereas when the carriage is pushed home correctly the plate 111 can be locked and the pin 110 projected through the support 1, the perforation 113 in the carriage and on to the detent ⁇ 107 which is then deflected from the abutting ⁇ position with the locking bar, the latter then moving in the direction of the arrow 105, Fig.
- the carriage is so constructed that a card cannot b-e gripped by the carriage until the carriage is in correct relation with the punches and with the carriage is positively guided by the punches.
- the carriage may be provided with a plate 114 to facilitate manipulation.
- a carriage magazine and a picker mechanism operating synchronously with the carriage.
- a picker 116 the operating edge of the picker being parallel to the carriage so that a card engaged thereby is correctly aligned with the carriage when the grippers close upon it.
- the picker is mounted so as to overlap the card to be removed towards the carriage for a distance slightly less than its thickness, so that in moving the card forward the card is slid towards the carriage without the picker engaging the next juxtaposed card.
- the cards preferably are carried on a plate or platform 117, clearly shown in Figs. 10, 24 and 25, which is spring controlled to press the pile of cards against a transparent, as for example glass, cover 118.
- a throat knife 119 which extends to the card being' moved by the picker so as to prevent the juxtaposed cards from being the movement of the top card of which the knife 119 is clear.
- the picker is operated to push the card against the carriage just before the end of its travel so that the abutment 103 and grippers 100 pass over and under the longitudinal edge of a card respectively during the final movement of the carriage until it is in the correct register position before explained, thereon the projection of the pin 110 causes the operation of the grippers to grip the card so fed to the carriage.
- the final movement of the carriage is effected at the expense of tensioning the spring designed to return the carriage to register position, in which position the card gripped by the carriage is j ust clear of the throat knife thereby any obstruction caused by the knife due to deflection in the card is avoided.
- the picker is guided in its movements by the horizontal guideways 120 in the supports 1 and 1.15 before referred to, and it is operated by a rocker shaft 121 carried between these supports and provided with short rocker arms 122, one towards each end ofthe pickwenr and having spherical ends which loosely engage in similar recesses formed in the upper ace of the picker.
- picker can be moved from towards one PHT A the side of the rocker shaft 121, under it, to the other in the feeding movement. This movement is automatically effected from the carriage, the latter being provided with a shoulder 123'which during the final movements of the carriage engages one arm 124 of a bell crank pivoted at 125, see Fig.
- the plate or platform 117 in association with the top 113 comprises a magazine for the cards, and the plate 117 forms in fact a. false bottom to the magazine of which the glass 113 is the top.
- the plate 117 is sup ported by springs so that the top card is always pushed against the glass 118.
- the plate 117 is provided along its longitudinal edges with guides 129, see Fig. 10, to receive the ends of rocking arms 130 pivotally carried at the bottom of the magazine so that the plate 117 with the arms forms 1n nature a cradle about the magazine springs 131.
- the wall in order that the collapse of the cradle and the lowering of the platform for the recepelfected when the wall 132 is dropped down, the wall is provided with cam plates 134 which bear on lugs 135 mounted on a spindle which forms thepivotof the respective rocker arm 130 so that when the hinged wall is dropped down the cams 134 at each end there- 117 pulled down at the expense of tensionin springs 131.
- the cradle in collapsed position is clearly shown in Fig. 25, the magazine then being ready for charging.
- Figs. and 24 show the parts when practically the last card is leaving the magazine.
- the cam plates 134 act as abutments between the lugs 135 aforesaid preventing the return movement of the lugs under effort of the magazine springs 131. owever, when the hinged wall is raised the tension in the magazine spring is utilized to keep the lugs bearing against the plates so that the false bottom of the magazine rises to push cards to the top of the magazine as the hinged wall is rocked up to close the magazine.
Landscapes
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB23952/28A GB321952A (en) | 1928-08-20 | 1928-08-20 | Improvements in punching or like machines for operating upon record or like cards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1856737A true US1856737A (en) | 1932-05-03 |
Family
ID=10203977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US384601A Expired - Lifetime US1856737A (en) | 1928-08-20 | 1929-08-09 | Punching or like machine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1856737A (de) |
| DE (1) | DE544435C (de) |
| FR (1) | FR696399A (de) |
| GB (1) | GB321952A (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2749986A (en) * | 1950-12-29 | 1956-06-12 | Maul Michael | Machine for operating upon perforated record cards |
| US3752391A (en) * | 1970-05-01 | 1973-08-14 | Varifab Inc | Punch and print data card recorder |
-
1928
- 1928-08-20 GB GB23952/28A patent/GB321952A/en not_active Expired
-
1929
- 1929-08-02 FR FR696399D patent/FR696399A/fr not_active Expired
- 1929-08-09 US US384601A patent/US1856737A/en not_active Expired - Lifetime
- 1929-08-20 DE DEA58805D patent/DE544435C/de not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2749986A (en) * | 1950-12-29 | 1956-06-12 | Maul Michael | Machine for operating upon perforated record cards |
| US3752391A (en) * | 1970-05-01 | 1973-08-14 | Varifab Inc | Punch and print data card recorder |
Also Published As
| Publication number | Publication date |
|---|---|
| FR696399A (fr) | 1930-12-30 |
| DE544435C (de) | 1932-02-22 |
| GB321952A (en) | 1929-11-20 |
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