US1791883A - Tabulating machine - Google Patents

Tabulating machine Download PDF

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Publication number
US1791883A
US1791883A US294089A US29408928A US1791883A US 1791883 A US1791883 A US 1791883A US 294089 A US294089 A US 294089A US 29408928 A US29408928 A US 29408928A US 1791883 A US1791883 A US 1791883A
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Prior art keywords
shaft
card
machine
discs
printing
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US294089A
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Fred M Carroll
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Tabulating Machine Co
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Tabulating Machine Co
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Priority to DENDAT511599D priority Critical patent/DE511599C/de
Application filed by Tabulating Machine Co filed Critical Tabulating Machine Co
Priority to US294089A priority patent/US1791883A/en
Priority to FR675487D priority patent/FR675487A/fr
Priority to GB2231229A priority patent/GB315885A/en
Application granted granted Critical
Publication of US1791883A publication Critical patent/US1791883A/en
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  • FIG. 1 is a diagrammatic representation of FIG.
  • FIGS. 1 A first figure.
  • the present invention relates to accounting machines and more particularly to improvements in record card controlled machines whereby the latter may be used in connection with various types of record cards.
  • Record-card controlled machines have been designed to operate in response to either regular Hollerith cards wherein a single index I point perforation by its location determines the differential adjustment of data indicating, devices, or in response to cards designated as combinational hole cards.
  • a single index perforation or different combinations thereof constitute the data controlling means and such cards are, comparatively speaking, preferable since they permit a greater amount of data to be placed upon the card for a given area.
  • Various types of machines employing combinational hole cards have been designed, such as,
  • Another object of-the invention is to provide means for suspending the operation of the device which permits combinational hole record cards to select numeral and alphabet
  • Fig. 1 shows diagrammatical representa-- tions of the mechanicalelements of a complete machine chine; i
  • Fig. 2 shows the circuit diagram of the ma- Figs. and 11 are detail sections of parts of one of the clutches in Fig. 9, being taken on linesf10-1O and 11-11 of Figs. 13 and 12, res ectively igs. 12 and 13 are sections on lines 1212, and 1313 of Fig. 9;
  • Fig. 14 is a detail of the platen shifting and printing mechanism
  • Fig. 15 is a diagrammatic development of the translating mechanism illustratin the method of translating a multi-hole com ination into a single timed operation
  • Fig. 16 represents a card field with the character code represented thereon
  • Fig. 17 is a section through the translating mechanism showing a translating device in elevation beingtaken along the lines 17-17 of Fig. 1;
  • Fig. 18 is a sectional View along the lines 18-18 of Fig. 17;
  • Figs. 19, 20 and 21 are details of the trans lating mechanism showing the parts in different positions.
  • Fig. 1 the motor for driving the machine elements is shown at and is are mounted and shafts 54 and 55, the former of which operates the total timer 56 and the translating elements 57 and the latter of which operates the starter timers 58 and 59.
  • the printing drum 61 and the platen 62 are likewise driven from the gear train 51.
  • the shafts 53, 54, and the drum 61 rotate constantly as long as the motor 50 is in operation.
  • the card feed clutches enclosed in the clutch box 63, are driven from the shaft 53.
  • the card feed mechanism is driven from clutches through a gear train 156 and the clutches are so arranged that certain types of cards will be fed to the analyzing mechanism every fourth cycle as long as the card feed clutches are in operative position and regular Hollerith cards every machine cycle. That is, certain types of cards will be fed to the analyzing mechanism during one o cle and the card feed will then be suspende during the two following cycles and regular Hollerith cards will be fed every machine cycle.
  • the machine requires certain card feed cam contacts to be closed every cycle and certain other card feed cam contacts closed every three cycles.
  • the machine is provided witha switch bar 700 called the adding and listing switch bar.
  • the adding and listing switch bar serves to connect the accumulators and printing call magnets with the analyzing mechanism or brushes during adding and listing cycles.
  • the adding and listing switch bar is shown in open circuit position.
  • the adding and listing switch bar is controlled from a jack 81 which consists of a ram 82 mounted on shaft 53. As the shaft rotates the cam permits a rod 83 to rise and release the bell crank lever 84 thereby permitting a spring 85 to move the switch bar 700 to circuit closing position during the tabulating and listing portion of each machine cycle.
  • the timers 56, 58 and 59 driven by the shafts 54 and 55, consist essentially of a group of cam operated contacts whose function is to close certain controlling circuits at certain predetermined times during machine operation. These timers do not operate constantly but only when the card feed is initiated and during total taking operations.
  • the timers 58 and 59 control the starting of card feed and the timer 56 controls total taking. Each of these timers when set into operation is operative for six machine cycles to control contacts as will be hereinafter described.
  • the tabulating shaft 52 drives the several counter elements 120 of the machine.
  • Each counter element (see Fig. 8) is provided with an individual driving shaft 121 geared to the tabulating shaft through bevelled gear 122 and bevelled pinion 123 and constantly rotated thereby.
  • Fixed 'on the shaft 121 is a clutch member 124 and freely mounted on the shaft 121 is a slidable member 125 which corresponds to the usual counter element of accumulators.
  • the members 124 and 125 have cooperating clutch teeth on their adjacent faces and when the counter element 125 is shifted to bring its clutch teeth into engagement with those on the member 124 the member rotates with the shaft 121.
  • the shifting mechanism consists of a lever 126 which is urged by a spring 127 to constantly force the member 125 into clutching engagement with a member 124.
  • This shifting action is normally prevented by latch 128 whose end is under an arm on the shift lever 126.
  • Energization of the counter magnet 130 attracts its armature 131 and an extension 132 thereon. rocks the latch 128 from beneath the arm of shift lever 126;
  • the lever thereupon shifts the member 125 into engagement with the member 124.
  • a lug on a sleeve member 133 fixed to the shaft 121 engages the shift lever 126 at a predetermined point in the cycle and rocks it into latching position disengaging the counter element 125 from the driving element 124.
  • the magnet 130 is energized in response to perforations on a controlling record and the clutch kick-out is timed so that the movement of the counter element corresponds to the number reperence should be had for a com lete explanation of them. They have been cscribed very briefly in the present case merely to aid in'an understanding of the present invention.
  • the card feed mechanism has been modified to conform to the peculiar operation of the machine which makes it necessary to suspend the card feed during certain operative printing cycles for certain types of cards and to permit feeding or regular Hollerith cards during every machine cy'cle.
  • Other improvements have also been incorporated in the card feed, for example, the feeding mechanism is arranged to provide for the different spacing of the index point designations on the different types of cards used to control the machine.
  • the card magazine having a stack of cards therein is indicated at 160, and the discharge rack directly below it at 161.
  • the cards are fed from the magazine 160 by a picker 162 which is operated by an oscillating lever 163 driven by a connecting rod 164 whose end distant from the lever 163 is eccentrically pivoted on a gear wheel 165 attached to a shaft 165a which is driven, during one cycle and remains idle during the two following cycles or is driven once every machine cycle as will hereinafter be explained.
  • the picker oscillates it feeds the lower card of the stack in the magazine to a set of feed rolls 166, likewise driven by the gear 165,
  • the two brushes in each pair 167 and 168 are spaced apart so that asa card feeds under them, one of the brushes cooperates with an index point position in one field of the card while-the other cooperates with the correspondin'g index point position on the other card field, that is, as the card passes under the brushes one brush analyzes one field while the other brush analyzes the other at exactly the same time. Items on the two card fields may thus be entered into different accumulators or printed on different printers.
  • the brushes cooperate with conan extension 176 extends into the path of aportion of the card being analyzed. A card in passing rocks the extension 176 of the lever 175 counterclockwise, pulling the rod 174 to the right as shown in the figure and rocking the bail 173 to close the contacts 172.
  • each card after passing through the upper set of rolls is delivered to a lower set of feed rolls 180 which are driven from the drive mechanism of the upper rolls.
  • a pivoted member 181 is rocked during each card feeding cycle by a cam 182 also driven from the gear train driving the feed rolls and the movement of the member 181 is timed so that as the card feeds along the conveyor system its edge eventually encounters the member 181 and shortly after the cam rocks the member 181 forcing the card to the lower rolls 180 which eventually deliver it to the discharge rack 161.
  • a positive feed is provided for forcing the card from the last set of lower rolls 180 in the form of a member 184 which is operated to engage the trailing edge of each card through a link 185 and cam 186- Oar-d feeding devices
  • the mechanism for operatin the card feed mechanism for the combinational hole cards represented by Fig. 6 will now be explained in connection with Figs. 9 to 12, inclusive.
  • the shaft 53 (see also Fig. 1) rotates constantly while the drive motor is in operation, making one revolution for each machine cycle.
  • the card feed mechanism including the picker and the feed rolls, just described is driven from the shaft 191 mounted in alignment with the shaft 195 and driven therefrom through a one revolution clutch.
  • the shaft 53 through one to one gears 192 and 193 drives one element 196 of a one revolution clutch freely mounted on shaft 195.
  • the other element 198 of this clutch is fixed to the shaft 195 and clutching engagement between the elements 196 and 198 may be effected by a card feed clutch magnet in which case shaft 195 rotates revolution for revolution with the constantly rotating shaft 53.
  • the shaft 195 must drive the card feed shaft proper 191 under two different conditions; first, when the machine is started with no card under its upper brushes, in which case the first card will feed from the card magazine to the upper brushes during one machine cycle and from the upper to the lower brushes during the succeeding cycle;
  • the shaft has the driving element 205 of a second one revolution clutch fixed to it of which the driven element 206 is fixed to the shaft 191 (see also Fig. 10).
  • This clutch is normally engaged and consequently when the machine is put into operation with no card under the upper brushes the shaft 191 will make two revolutions with the shaft 195 feeding the first card first under the upper brushes and then under the lower brushes during successive machine cycles.
  • the first card reaches the lowor brushes of course the second condition prevails and card feed must now be suspended for two machine cycles after another card is fed to the lower brushes and analyzed.
  • the shaft 195 carries a gear 199 which meshes with a gear 200 fixed to a sleeve 208 freely mounted on shaft 201.
  • the gear ratio in this case is one to three so that sleeve 208 makes one revolution for every three revolutions of the shaft 195.
  • a driving element 202 of a third one revolution clutch whose driven element 203 is fixed on shaft 201.
  • This clutch is controlled by a secondary card feed clutch magnet which is energized only when there is a card under the upper brushes and the clutch 196198 is in operation. When this third clutch engages the shaft 201 rotates with a one to three ratio with shaft 195.
  • a cam 239 through suitable linkage then insures that when the clutch 196-198 is once engaged it will remain engaged for three machine cycles or revolutions and a cam 252 through suitable linkage causes the clutch 205 to engage during one machine cycle and to disengage during the two following cycles. This complete operation will be more fully described in connection with the following explanation of the clutch mechanical details and in the explanation of the circuit diagram.
  • the one revolution clutch for driving the shaft 195 from the shaft 53 consists of a disc 196 rigid with the gear 193 and having a notch 211 of a peculiar form in its periphery. This disc, of course, is free on shaft 195 and rotates whenever the shaft 53 rotates.
  • the second element 198 of the clutch fixed on shaft 195 carries a pivoted operating pawl 212 urged by a spring to constantly engage in the notch 211 but normally restrained from doing so by a latch 213.
  • the latch 213 is mounted on one element 225 of a toggle indicated generally at 214, the element 225 being fixed to a shaft 231 to which is also fixed an extending arm 215 having a hooked por tion 216 at its upper end which is engaged by a coacting hook on the ivoted structure supporting the armature 21 of the card feed clutch magnet 218.
  • the other element of the toggle consists of an arm 234 pivoted on a shaft 262 and connected with the element 225 by a pin and slot connection.
  • a member 227 Fixed to the shaft 262 (see also Fig. 11) is a member 227 having a double bevelled upwardly extending portion projecting into the path, of the tail piece of the pawl 212.
  • the member 227 is also provided with a notch 232 which straddles a shaft 229 and limits the movement of the member.
  • a light spring 235 urges the member 227 counterclockwise holding the lower edge of the notch 232 against shaft 229.
  • Energization of the magnet 218 attracts its armature 217, rocking the pivoted armature supporting structure and releasing the arm 215 which moves counterclockwise in response to the action of spring 219.
  • the toggle 214 breaks causing the latch 213 to release the pawl 212.
  • the pawl then rocks clockwise under action of its spring and its nose moves to the bottom of notch 211 in moving member 196, while its tail piece snaps past the bevelled end of member 227, the biasing spring of the latter yielding to permit this action.
  • the trailing edge of the notch 211 as indicated at 220 consists of a smooth curved surface terminating at the periphery of the disc in a slightly undercut portion 233.
  • a latch pawl 221 on the disc 198 slips into the notch 211 and engages a flat edge 222 of the notch, firmly locking the members together in a predetermined relative position.
  • theshaft 195 rotate for three revolutions.
  • thedisc 198 coacts a short distance and just erating members.
  • the driving member 203 is driven onethird of a revolution for each revolution of the shaft 195 and the drivingmember may sto in any one of three positions when the sha t 195 comes to rest in its home position. .
  • the provision of the three equally spaced notches insures that the shaft 201 will always start in the proper phase with the shaft 195 when the clutch magnet 245 of the clutch 202203 is energized.
  • the shaft 191 is driven by a clutch 205206 shown in the lower portion of Fig. 13 whose "clutching elements are exactly similar to those disclosed in connection with Fig. 12
  • the arm 249 is similar in its structure and operation to the supporting'structure for armature 217 (Fig. 12) and is operated by a pivoted arm 258 connected through a link 250 with a rock lever 251 whose end rides on a cam 252 fixed to shaft 201.
  • the cam 252 is provided with a raised surface 253 which once each revolution of shaft 201 rocks the arm 251 clockwise raising the link 250 and rocking the arm 258.
  • a rearward extension of the latter carries a pin 259 which engages the latch 249 rocking it clockwise to release the lever arm 247.
  • This raised portion 253 is so located on the cam 252 that in the normal rest position of the shaft 201, the toggle 246 will be broken permitting the clutch elements to engage. Now as long as the shaft 201 remains stationary the clutch 205-206 remains engaged and shaft 191 rotates with shaft 195. Thus when the machine is started with no card under the upper brushes the shaft 191 will make two revolutions with shaft 195 to feed the first card under the lower brushes. During these two cycles, of course, the driving element 203 rotates freely on the shaft 201 and the latter does not rotate. But now if the magnet 245 is energized to engage the clutch 202-203 the shaft 201 rotates and shortly thereafter the arm 251 drops to lower portion of cam 252 permitting the latch 249 to move to latching position.
  • Gard feed controlling devices The particular clutch mechanism just described is precisel the same as that disclosed in the prior app ication Serial No. 185,711 filed April 22, 1927, and is utilized for combination hole cards of the type shown in Fig. 6.
  • the feeding mechanism must be modified to insure cards are fed every cycle and that the different hole spacingbe taken care of.
  • the difference in the hole spacing of the two types of cards is readily apparent by a comparison of Figs. 6 and 7 and stated dimensionally adjacent combinational holes are spaced .184 apart while for Hollerith cards the spacing is .250".
  • shaft 191 is driven a complete revolution to feed a single card.
  • Fixed to shaft 191 is a gear 153 (Fig. 4) driving a gear 155 through a gear 154.
  • a gear 134 which in turn drives a gear 136 through gear 135.
  • the gear 136 is loosely mounted on a shaft 137 and drives a broad pmion 138 pivotally carried by a stud 139 carried by a yoke 140 which is mounted for a rocking movement about shaft 137.
  • the yoke is locked in the position. shown in Fig.
  • pin 141 is laterally adjusted to enter a hole fitted in the end of a reciprocating link 148 which is guided in its movement by an arcu'ately slotted guide plate 149.
  • Link 148 is articulated to an arm 150 whose roller 151 engages the race of a box cam 152 attached to shaft 191.
  • box cam 152 link 148 will be reciprocated thus reciprocating yoke 140 causing pinion 138 to roll over gear 136 while the latter is driving the gear 136 and also causing pinion 145 to roll over gear 146 while the latter is also being driven.
  • race of box cam 152 is so designed as to feed the card the remainder of its feeding movement at an increased linear speed to feed the card the proper distance to the next set of brushe and that the increased linear speed is also timed to occur to feed a-card from the stack 160 to the first set of brushes.
  • a suitable notch in the locking cam 267 is pre-v sented to the type carrier to permit it to be rotated about its pivot if it is selected for printing at this time.
  • the type are selected for printing by a call magnet 269.
  • the type carrier is actuated by a printing finger 270 having a hook 271 at its end adapted to 'engage an extension 272 on the type carrier if the printing finger is rotated about its pivot and this engagement, owing to the inertia of the rotating drum 61, forces one of the type on the carrier against the platen to effect printing on a record'sheet carrier thereby.
  • the finger 270 is normally held out of printing position by a compression spring 273.
  • A. pivoted lever 274 has a dog 275 pivoted to one of its arms which normally rests against the tipof the printing finger 270. The dog is free to rotate about its pivotbut is urged in a clockwise direction against suitablestops by spring 276. Another arm of the lever 274'is normally engaged in a notch 277 in the pivoted latch lever 278, the latch lever being urged to latching position by a spring -279.
  • the dog 275 being under the printing finger 270 thereupon rocks it against its spring 273 and forces the hook 271 into the path of the extension 272 on a type carrier which is thus called for printing.
  • the camming action between the extension 272 and the cam surface 287 continues after the'proper type is actually selected for printing and the dog 275 slips from beneath the end of printing finger 270 whereupon the spring 273 returns the printing finger to normal inoperative position and the latch lever 278 again engages 'the lever 274 and prevents its further operation until the call magnet 269 is again energized.
  • the platen is shown in full lines in one printing position and in dotted lines in its other printing positions. As previously stated it is necessary to shift the platen successively to its three printing positions so that when a type carrier is rotated about its pivot the proper type will strike the platen.
  • the mechanism for shifting the platen is also illustrated in Fig. 14.
  • the platen 62 is journalle d in a pivoted frame 290 normally held by a spring 291 so that the platen 62 assumes its upper position as shown in dotted lines.
  • Anoperating lever 292 pivoted on the shaft supporting the frame 290 has one arm operatively engaging a pin 293 on the frame and the other riding on the surface of a cam 294.
  • This cam through a one revolution clutch 294a controlled by magnet 295 may be clutched to the shaft 296 which through a gear train of suitable ratio is connected to the driving motorof the machine so that this shaft makes one revolution for every three machine cycles.
  • the earn 294 is provided with three dwells each covering. approximately one-third of its periphery and each at different radial distances from its center. Normally the lever arm 292 rests on the lowest dwell of the cam permitting the spring 291 to hold the platen 62 in its uppermost position. to the shaft 296 the platen remains in this position.
  • Fig. 16 The code of the combinational index point system by which the different characters are designated is indicated in Fig. 16.
  • a portion of a card field is divided by vertical and horizontal lines into horizontal rows and vertical columns.
  • the index point positions on the card correspond to the little squares formed by these lines.
  • the columns vertically contain six index point positions represented by the letters A, B, C, D, E and F to the left of the diagram, A designating the lowest index point position, B the nexthighest, and so on.
  • the alphabet, digits and other desired characters are indicated at the top the several columns.
  • the corresponding code of perforations b which they may be represented on the card field is shown in the column directly beneath them.
  • a character may be represented by either one, two or three perforations in a column.
  • the letter I is represented by a single perforation in the A osition
  • the letter D is represented by a per oration in the C position in combination with a perforation in the E position
  • the letter C is represented by a combination of perforations in the D, B and E positions.
  • This code requires only six index point positions to represent all the characters in general use and two of these card fields may be conveniently placed one below the other on the controlling card now in use, in effect doublingits capacity.
  • the present machine as will be understood from the revious description analyzes each column 0 a card field with a single brush and the analysis is made while the card is in motion. This means that the perforations of any given combination are not analyzed simultaneously but successively and as the printing and accumulating requires a single timed impulse to properly select the required type or to properly initiate the accumulating operation these successive analyses of the perforations in a given combination must be set up, held temporarily and converted in a single timed operation.
  • Fig. 15 shows a development of six discs A, B, C, D, E and F corresponding to the several index point positions in Fig. 16. These discs although actually all of the same size have been represented by concentric circles in Fig. 15 for the purpose of clearly showing their cooperation.
  • the discs are 1,791,aas
  • the indentations in the circles represent notches in the discs and normally any character will be printed if notches in the discs are aligned along the radial line corresponding to the character.
  • the printing of any character then requires six notches to be aligned along a radial line.
  • Notches on the discs corresponding to the index point positions which are not actually involved in the combination corresponding to a character are normally aligned. For example along the radial line representin the character A-notches in the F, D and C an A discs are on'the radial line while notches in the E and B discs corresponding to the indeX point combination for the letter A are not on this line.
  • the brush senses the positions A, B, C in order. ⁇ Vhen it encounters a perforation in the B position the disc B is shifted to bring a notch therein along the radial line corresponding to A. This is still not sufficient to select the A type for printing as the E disc still has no aligned notch.
  • the brush reaches the E position and encounters a perforation, the E disc is shifted on the shaft bringing a notch thereon to the radial line A whereupon each disc along this radial line has a notch on the radial line corresponding to A.
  • the discs rotate continuously regardless of this relative displacement and at a given point in the cycle a suitable member drops into the aligned notches and selects the printing type corresponding to the character for printing.
  • the characters are di vided into three groups around the periphery of the discs, the first group consisting of all the digits and the letters A, T, S and G.
  • the second group consists of a number of special characters and the letters of the alphabet from U to Z respectively while the third group consists of the remaining letters of the alphabet.
  • the member which searches the aligned notches is placed in a definite location pastwhich each group moves during a separate machine cycle. Thus three machine cycles are required to pass the three groups past the searching member.
  • the printing drum makes three revolutions for each revolution of the translator discs and the upper type on the carriers correspond to the characters in the first group.
  • the type carrier on which the type is located will be selected during this cycle.
  • the platen goes to the intermediate position to select the middle type on the carriers which correspond to the second group and the aligned notches in this case will select the proper type carriers to print characters of the third group.
  • the platen goes to its lowermost position to effect printing of any characters in the third group and aligned notches in this group will select the carriers during this cycle.
  • any character represented in the card which has been analyzed will be printed and any digit represented may be entered into the accumulators and accumulated.
  • Figs. 17 to 21 inclusive a complete translator for a denominational order is shown driven from the shaft 54 (see Fig. 1).
  • the translator comprises generally two sets of discs represented at 299 and 300 which are driven with a one to three ratio from the shaft 54.
  • the discs 300 correspond to the notched circles A, B, C, etc. in Fig. 15 and are frictionally mounted on a sleeve 301 freely rotatable on a stud 302 (see Fig. 18).
  • the sleeve 301 is provided with a flange 325 and the discs A, B, C, etc.
  • fric tion discs 303 are separated by fric tion discs 303 and the whole assembly is mounted on the sleeve and held against the flange by a retaining plate 326.
  • the plate 326, the friction discs 303 and the discs A, B, C, etc. are perforated to fit over tapped studs 327 fixed in the flange.
  • the friction discs 303 are provided with holes closely fitting the studs so that there is no relative movement between them and the sleeve, while the studs pass through slots 305 in the discs A, B, C, etc. (see Fig. 17) so that the latter discs, while they will always rotate with the sleeve are permitted a limited movement relative thereto.
  • Suitable machine screws 331 coacting with internal threads in the studs 327 hold the assembly of "discs firmly on the sleeve but permit ready removal if it becomes necessary to replace any disc.
  • the sleeve 301 is similarly held on the stud 302 by a screw 332.
  • the limited movement of the discs 300 on the sleeve 301 is utilized to align the notches in the discs as explained in connection with Fig. 15.
  • An operating pawl 320 cooperates with each of the discs 300. Any pawls which are released during the cycle ride on the periphery of the disc as shown in Fig. 19 until they reach a notch 323 in their discs whereupon each is actuated by an individual spring 338 to engage a deep notch 323 as indicated in Fig. 20. After the necessary pawls 320 have been released and engage their notches 323 in this manner a bell crank 328 is rocked by a projection 329 on a disc 330- also driven by the gear 309 and this bell-crank rocks the pivoted supporting structure of the pawls 320 against the action. of a spring 335 as shown in Fig. 20. This causes each o-perating pawl 320 which has engaged a notch 323 in its associated disc to shift the disc about the sleeve 301 in a. clockwise direction to the.
  • the translator is searched for set ups correspomling to type of the second or intermediate group and during the third cycle for set ups corresponding to type of the third or lower group.
  • a plurality of counters have been indicated at 364 and 365 which are of the type disclosed in my copending application Serial No. 147,960, filed November 12, 1926, whose counter magnets 366 are connected to sockets on the plug board 355.
  • The-machine is started in operation by one of the starting timers D and E and is controlled when total printing is desired by the total timer F.
  • the operation of all these devices are fully explained in my copending application above referred to and will be very briefly described in the present case.

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  • Delivering By Means Of Belts And Rollers (AREA)
  • Credit Cards Or The Like (AREA)
  • Handling Of Sheets (AREA)
US294089A 1928-07-20 1928-07-20 Tabulating machine Expired - Lifetime US1791883A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DENDAT511599D DE511599C (fr) 1928-07-20
US294089A US1791883A (en) 1928-07-20 1928-07-20 Tabulating machine
FR675487D FR675487A (fr) 1928-07-20 1929-05-22 Perfectionnements aux machines tabulatrices, calculatoires ou commandées par des cartes enregistreuses
GB2231229A GB315885A (en) 1928-07-20 1929-07-19 Improvements in or relating to record-card-controlled statistical machines

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Application Number Priority Date Filing Date Title
US294089A US1791883A (en) 1928-07-20 1928-07-20 Tabulating machine

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US1791883A true US1791883A (en) 1931-02-10

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US294089A Expired - Lifetime US1791883A (en) 1928-07-20 1928-07-20 Tabulating machine

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US (1) US1791883A (fr)
DE (1) DE511599C (fr)
FR (1) FR675487A (fr)
GB (1) GB315885A (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3033449A (en) * 1958-10-20 1962-05-08 Cummins Chicago Corp Coded information reading apparatus
US3100113A (en) * 1960-11-01 1963-08-06 Ncr Co Check feeding and alining mechanism

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GB315885A (en) 1930-10-20
FR675487A (fr) 1930-02-11

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