US3081446A - Decoding and printing system - Google Patents

Decoding and printing system Download PDF

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US3081446A
US3081446A US806161A US80616159A US3081446A US 3081446 A US3081446 A US 3081446A US 806161 A US806161 A US 806161A US 80616159 A US80616159 A US 80616159A US 3081446 A US3081446 A US 3081446A
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relay
information
digit
operated
contact
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Toussaint Jean Emile Ghislain
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International Standard Electric Corp
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International Standard Electric Corp
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations

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  • the invention relates to a decoding and printing system.
  • Such a system may for example be required for the autornatic processing of documents and data e.g. a system conceived for the automatic processing of bank cheques.
  • each cheque which has to be processed, is first inserted in a document carrier, provided with a magnetic tape strip, on which the relevant cheque information, e.g. account number and amount, is inscribed.
  • the insertion operation is realized by means of a machine sueh as described in Belgian Patent No. 577,761, while the encodingr operation is executed by a mechanism, such as disclosed in Belgian Patent No. 577,749, patent application No. 226,884, the above mentioned encoding and printing system controlling the encoding operation.
  • the processed cheques are thus divided in at least two groups: incoming cheques, which are cheques of the bank itself, and outgoing cheques, which ⁇ are the property of other banks.
  • the system in accordance with the present invention is particularly, but not exclusively, devoted to the processing of outgoing cheques, together with the control of their extraction out of their document carriers.
  • the principal object of the present invention is to provide an electrical and electronic control for such a machine and particularly for decoding and printing the information, which is encoded on the strip of magnetic tape that is fixed on the document carrier wherein the cheque is held.
  • At least one storage device into which the whole information, read from the document carrier with the help of a reading mechanism, may be stored and from which the required decoding and printing operations may be carried out.
  • a system for decoding and printing information encoded on a magnetic record is characterised in, that said magnetic record appears on individual documents or on document carriers, eg. a piece of magnetic tape affixed on a carrier enclosing a cheque, that said system includes first means for reading said encoded information, second means for transmitting the read information to a storage device, third means for transmitting the stored information to a decoding circuit, and fourth means, ⁇ associated with said decoding circuit, for transmitting the 3,081,446 Patented Mar. 12, 1963 ice decoded information to a printer which is able to print this information.
  • Another object of the invention is to save time in printing serially by avoiding the'printing of an account number, or other identifying information, whenever this is the same as the number of the preceding item.
  • a decoding and printing system as described above, is characterised in that it comprises a comparison circuit associated with said storage device for comparing said read information, or part thereof (eg. the account number), with the corresponding part (eg. the account number) of the information previously stored in said storage device.
  • a comparison circuit associated with said storage device for comparing said read information, or part thereof (eg. the account number), with the corresponding part (eg. the account number) of the information previously stored in said storage device.
  • a decoding and printing system as described above, is characterized in that it includes an adding machine which enables the information or part thereof (eg. the amount) to 4be stored in its totalizer.
  • FIGS. l to 7, the latter three assembled as shown on FIG. ll, constitute a complete circuit diagram of a detailed embodiment of the invention.
  • FIG. 8 is a timing chart of the reading operation
  • FIG. 9 is a timing chart of the ⁇ generation of a train of four advancing pulses.
  • FIG. l0 represents a disk, part of a reciprocating mechanism for displacing a magnetic head
  • FIG. 11 shows how FIGS. 5 to 7 have to be assembled
  • FIG. 12 is a block diagram of the decoding and printing system of this invention.
  • the information encoded on a checque is constituted by an eight-digit account number, a two-digit sorting prefix which characterizes the type of cheque is constituted by an eight-digit ⁇ account number, cheques, ⁇ a one-digit sign of amount to indicate debit or credit for the bank, an eleven-digit amount, and ⁇ a last digit or stop symbol which characterises the end of the multi-digit information.
  • a three-digit so-called credit item, characterizing the number of cheques accompanied by a deposit ticket may be encoded on the documen-t carrier.
  • a deposit ticket is a ticket deposited by the owner of a bank account when he delivers a number of cheques to his bank to be added to his bank account. He thereon inscribes his own yaccount number and .the total of the amounts of said number of cheques.
  • each full number including the end code is inverted to give the second representation and the inverted end code also cannot correspond to one of the decimal digits.
  • the double serial encoding of each full number in normal ⁇ and inverse form, the fuil inverse form following the full normal form has the advantage that it is practically impossible for any error to remain undetected. This would require ⁇ that if a fault causes a binary 1 to become a binary 0, some other fault should simultaneously transform the inverse O into a l, and the chances of such complementary errors are too remote to be taken into account.
  • the stop symbol is the 4digit binary number 0110.
  • the 'l-digit binary numbers 1111 and 0G00 are respectively allotted to the -iand signs of amount.
  • the above mentioned presorted (in accordance with sorting prefix and account number) cheque carriers are delivered, one by one, to a so called reading position in a manner disclosed in the above mentioned ⁇ Belgian Patent No. 577,761.
  • the encoded information relative to a first arriving cheque is then read by a mechanism such as described in the Belgian Patent No. 577,749. Afterwards it is transmitted to an electronic storage device which may conveniently be a pattern shift register such as disclosed in the United States ⁇ Patent No. 2,649,502 of A. Odell where each stage, adapted to store a binary-bit, includes a cold cathode tube plus associated circuitry.
  • the information is transmitted digit by digit through a self-checking decoding circuit to an adding machine, and when no discrepancies are detected by this self-checking circuit, the information is printed by a printer which is a part of said adding machine.
  • a following document carrier is then transferred to the reading position and the information encoded on its tape is also read and serially stored in said shift register.
  • iirst cheque may be serially compared i.e. bit by bit with the corresponding information, relative to said iirst cheque, already stored in the shift register in normal form (i.e. in the case of the so called automatic feed).
  • the compared information is prevented from being transmitted to said ⁇ self-checking decoding circuit so that it cannot be printed. It is to be remarked that the amount is always transmitted to the adding machine and printed when no discrepancies are detected by said decoding circuit.
  • the machine is provided with a mechanical counter for counting the document carriers arriving in a so-called output position.
  • the latter carriers are transferred to an output stage which is enabled to contain only a certain predetermined maximum amount of document carriers, e.g. 1000. 1t may however be desired to make bundles of the cheques (eventually only one cheque) which are provided with the saine account number and to remove these bundles out of the output stage immediately after they have been foi'med. It is clear that in that case the counter has to be reset ⁇ to its zero condition.
  • the machine In case of automatic feed, the machine will be stopped after a difference between two compared bits is detected i.e. at a moment when at least the first bit of the first digit of the sorting prefix of the read cheque is stored in the shift registers.
  • the new information of the new cheque having a different account number will nevcrtheless continue to be entered in complementary and in noi'- nial form in the shift registers.
  • the circuit which provides wipingout pulses for the shift registers in case a discrepancy between the two forms of the same information is detected will be actuated to wipe out the information of the new cheque which must be read again to permit printing of the new account number.
  • the machine can be ptit in a so-called single-feed condition, whereby the account numbers of two successive cheques are not compared. Due to the latter fact, the shift registers must also not be cleared and the total key must not be depressed during each stop period.
  • the machine has been provided with a so-called automatic or single feed key. With the key in automatic feed position, the machine works as described above, while with the key in the ⁇ single feed position, the total key need not be depressed in order to be able to process a following cheque.
  • the reading station the read cheque is transferred to a position wherein it is extracted out of its document carrier, and afterwards the latter is then transferred to an output stage.
  • the reading position is provided at its left and right top corners with a photocell Phl and P112 respectively near the entrance and the exit of said position. In its middle it is yfurthermore provided with a photocell P113. The location of these photocells is not shown here but the corresponding signals appear on FIG. 4.
  • the former two photocells P111 and Ph2 are prevented from receiving the light ⁇ from their corresponding light source by a document carrier positioned .in the reading stage, while the latter photocell Pita is prevented from receiving the light of its light source .by a document actually positioned in said Adocument carrier.
  • the relays Glr, G21 and G5r are normally operated.
  • the relay G21' is thu-s operated, and by closing its make contact g2r (FIG. 4), it energizes the relay G31'.
  • the relay G31' By opening its break contact g3r2, the latter removes the ground from the relay F51' (FIG. 3), ⁇ and by closing its make contact g3r, it operates the relay G4r as follows:
  • the relay G41' light-s the lamp no drop or shift NDS (FIG. 4) by closing its make contact g4r, while it prevents, in a manner not shown, the operation of the mechanism located in the next or so called unjacketing position, described in detail in the above-mentioned Belgian Patent No. 577,767.
  • the relay G4r is prevented from being operated due to the opening of make contact gar, sothat the no-drop-orshift lamp is not lighted and the operation of the mechanism located in the above mentioned unjacketing position is not interrupted.
  • Relay G12r is unlocked by the operation of the relay G1413 since the later releases the relay Gur. It is also unlocked by the reject signal in a manner described above, since the relay Gwr is then operated.
  • a start key SK (not shown) is depressed, thereby closing its contacts 8K1, SK2 (FIG. 4) and 8K3 (FIG. l).
  • the relays G121' and Glgr are operated.
  • the former relay (3121F is locked through the' closed make contacts gurl, gur and through the closed break contact glor of the unoperated relay Gmr.
  • the latter relay G13r is locked through the closed make contact gurl and the closed break contact cwg of the carnwheel (not shown).
  • the relays G121' and G131' each apply a ground connection to an associated contact of a so-called automatic or single feed key AFK, shown in (FIG. 4) in its neutral position.
  • the latter key may be put from its neutral into one of its two active positions: automatic or single feed.
  • the so called main clutch Mn is operated and the machine starts an automatic cycle.
  • the contacts AFI, AF2 are closed, while the contact SF is opened, while in the single feed position, the contacts AFI, AF2 are opened and the contact SF is closed. It is now supposed that the key is put in its automatic feed position.
  • the relay A11' operates the relays A31' and A41' (FIG. l) by closing its make contacts alrl and a1r2 respectively, and the relay A31' locks itself on a ground given through the closed break contact c1711 and on a ground given through the closed make contact a4r1.
  • the relay G31' being released in a manner described above, Voperates the relay F51A through its closed break contact g3r2 (FIG. 3). By opening its break contact f51'1 the relay F5r releases the normally operate-d relay F21' (FIG. l). However, due to the operation of F3n the relay F21 (FIG. l) is then again operated through the closed make contact f31.
  • the relay AG1' discharges the capacitor C1 which was, through the closed contacts ⁇ a61'1, (151'1 and the coil of the relay A1111' (FIG. 2), at nearly the complete battery potential, since the value of the resistance R1 is high with respect to the value of the coil resistance of the relay Amr.
  • a ground is given by the closed make contact arg, so as to reduce the discharge time.
  • a resistance R1 is further connected in series with the capacitor C1 in order to limit the discharge current on said Contact arz.
  • electromagnets constitute parts or" an encode and read mechanism, of the type mentioned above, which enables a reciprocating motion of a magnetic head which is normally uncoupled from a constantly rotating motor, since said so-callcd brake eleotromagnet Sp is normally operated.
  • it is sutiicient to release brake electromagnet Sp and to operate a coupling electromagnet St.
  • This cushion is therefore attached to the plunger armature of a pressure electromagnet Pr which is operated simultaneously with said coupling electromagnet Sr.
  • the read mechanism comprises a synchronizing slotted disk which enables, due to its association with one or more photocells, the delivery of signals during well defined time intervals.
  • the disk is slotted as shown on FIG. l0, and it is associated with the photocell Plz.
  • the length of a So-called reading authorization signal Reh a' is determined. Indeed, this authorization is given as long as the photocell Plz receives the light from a light source through one of said slots. Since the disk makes one rotation for two cyclic displacements of the magnetic head, two slots are provided.
  • the operation of the relay C101' makes the total key TK inoperative (HG. 3) by opening its break contact C1571.
  • the relay B11' By closing its make contact b1r, the relay B11' (FIG. l) operates the parallel connected relays B21' and Br (PEG. 2) which are both locked through the closed make contact b21' and the closed break contact br.
  • a constantly rotating motor being coupled to the encode and read mech- :mism as described above, reading authorization signal Rr/Au is given when the above mentioned photocell Plz (Piu. 6 and l0) receives the light from a light source through one of the slots provided in said disk (FIG. 10).
  • the relay Agr (FIG. l) is operated, and by the closure of its make contact ngrz and ngrg, respectively, the relays Amr (FIG. 2) and Amr (FIG. 1) are energized.
  • the relay A-,fxr By closing its make contact nur, the relay A-,fxr operates the relay A131' (FIG. l).
  • the break contact a9r1 being open, the capacitor C2 (circuit of relay Ar), previously charged through t .e winding of Aqr and slightly discharging through R2, is now fully discharged through protecting resistor R during closure of the make contact amrg.
  • the above mentioned recording tetrad is a part of a chain of shift registers including the shift registers ML1 and ML2 (FIG. 5). It is constituted by four series-connected cold cathode tubes, while said shift registers are each formed by eleven consecutive tetrads so that they are adapted to store the sorting prefix, the account number, and the sign of amount on the one hand, and the amount of a cheque on the other.
  • the read mechanism is kept running as long as the start key SK is depressed. Normally the start key will be released before the end of the reading operation, so that the brake electromagnet is operated at a convenient time sutlicient to stop the read mechanism in a position such that the displaced magnetic head is in one of the limit positions of its reciprocating travel. It may however, happen that, at the moment the start key is released, the displaced magnetic head takes a position close to one of said limit positions.
  • the relay Agr (FIG. l) releases and energizes temporarily the relay A11' during the charge of capacitor C2. Two different cases may now be distinguished due to the fact that the start key may be released during said short operation time or not.
  • the relay A31' releases as soon as the reading authorization is removed, i.e. when the relay A11' is temporarily operated. Indeed, the relay A31' was locked through the closed break contact o11'1. The relay A31' being released, the relay Aar also releases and operates the brake electromagnet Sp (FiG. 3) and the mechanism is stopped in the appropriate limit position.
  • the relay A41' (FIG. l) is locked through its own closed make Contact n i'g and the closed make contact aqrz. It thus keeps relay A31' (FIG. 1) operated through its closed make contact 11.11'1 until the relay A11' releases. At that moment the relay A31' locks itself again through the closed break Contact a7r1 for another new but ineflective cycle of the mechanism. The latter mechanism will then stop in appropriate position, as described above.
  • the reading of the information encoded on the document carrier positioned in the reading stage may start. Since on the tape, the complementary form of the information follows the normal form, it will be transmitted to the shift registers after inversion so as to finally store the information in normal form.
  • an information and a parallel synchronizing pulse track are encoded on the magnetic tape strip lined on each document carrer and every binary digit encoded on the tape is followed at a half period distance by a reversal of magnetisation on that synchronizing pulse track. Furthermorc it is to be remarked that a 1 corresponds to a change in magnetisation of the tape, while no change is made for a O.
  • the information and synchronizing pulse 4 racks are respectively read by the reading amplifiers RAI and l-lAA (FlG. 6) connected to the twin magnetic head MH.
  • Every magnetic saturation reversal on the information track read by the reading amplier RAI triggers the monostable multivibrator M55 to obtain, through the AND gate g1g, a ciean pulse of 10 as., the other input lead of g1g being activated by the reading authorization signal.
  • the pulse produced by M85 is fed to a special stage T2 of the shift registers designed to record this pulse.
  • the state of the tube used in T2 will then control the synchronizing pulses received through amplifier -RAA from the master channel, and which lag by about half a period behind the eventual information pulses, so that these synchronizing pulses Will actually produce pulses or not, in accordance with the respective absence or presence of an information pulse on the corresponding track. In this manner, the operation becomes independent, Within one period, of the small phase shifts between the pulses on both tracks, since the pulses from the master channel Will perform the double task of actually feeding the information to the shift registers as well as advancing the information pattern.
  • every magnetic reversal thereon delivers a pulse which is fed through AND gate g21, the other input Ilead of which is already activated by the reading authorization signal.
  • the pulse thus obtained, hereafter called A pulse, is applied to an input lead of AND gate g1g (FIG. 6), the other input lead of which is conditioned by the state of tube T2.
  • This A pulse is thus only permitted to be fed through said gate when the latter tube was not tired i.e. when no information pulse, or, in other Words, when a was read from the tape.
  • the resulting pulse is delayed by 60 us. by delay unit D2 4and then applied to monostable multivibrator MSG which produces a clean pulse of ,11s.
  • a pulse is also applied through the mixer m11 (FIG. 6) and through a delay unit D3 of 10 ,ws to the monostable multivibrator M812 which produces an advancing pulse of fis.
  • This advancing pulse is then simultaneously applied to the partial shift registers ML1 and ML2, to the recording tetrad Rt, and to the special tube T2, as Well as to -another tube T1 the purpose of which will be explained later, and shifts the information previously stored therein.
  • the pulse eventually produced by the monostable multivibrator MSG, arrives at the starter of the tube 1 of the recording tetrad, it will find the latter deionized.
  • the tube T2 is -able to receive a following bit.
  • a pulse is .moreover also applied through a delay element D4 of 100 tvs. to a comparison circuit, the output of the delay element D4 being designated B pulses.
  • two comparisons are execute when processing a cheque: -a comparison between the account number of thischeque and the account number of the previously processed cheque, and a comparison between the normal and complementary forms of the same cheque.
  • a first cheque e.g. of a group with a same account number
  • the first comparison is naturally not possible and is not made.
  • the last tube 44 of the shift register ML2 (FIG. 5) is electrically coupled with an auxiliary tube T1, designed for memorizing the 4state of said last tube. Indeed, at the end of the advancing pulse shifting the information from the shift register ML2, the tube T1 Will eventually -be tired. This happens when the tube 44 was found to be fired When the advancing pulse Was applied thereon, i.e. when a 1 was stored therein.
  • the output leads of these tubes constitute the input leads of the AND gate 11.1 (FIG. 5).
  • the signals appearing on lthese leads are furthermore inverted by inverters i8 and i9 and 'applied .to the AND gate g13.
  • the above mentioned 10() us. delayed A pulse, hereafter called B pulse, is applied on said gates g13 and g14. Since it arrives as. after the A pulse one ensures that the tubes T2 and I of Rt are in the stable state when the .comparison .pulse is applied to these gates g13 and gm. Thus, it is easy to see that, only in case of non-conformity of t-he information, stored in the register andread from the tape, an output signal will appear at the common output lead x of the gates 13 and g14.
  • the start key SK need only be operated for the first processed cheque when the automatic or single feed key AFK is in its automatic feed position, as was assumed. In this manner the relay B1r is already released when processing the following cheques. A so-called account number authorization (can) is then given by the closed break contact b.11'1 (FIG 5). The iirst arriving A pulse is then permitted to be fed through the AND gate g1() to the long timing monoetable multivibrator MS2 which delivers a .signal during 20 ms. Indeed the input lead 3 of the gate g1g is activated, due to the monostable multivibrator M84 being in its stable condition.
  • the relay B151' (FIG. 2) operates the relay B121- when closing its make :contact b15r1.
  • the relay B121' then operates the parallel connected relays C21' and C21A (FIG. 2) through its closed make contact b121'2, While it energizes temporarily the relay C121A (FIG. 2) during the charge of the capaci-tor C1, the resistance R4 being too large to permit C12r to remain operated.
  • the latter relay G111' further releases the relay G12r by opening its make contact g111, While it brings a ground on the contact c2r1 (FIG. 2). Due to the opening of the make contact g131'2, the automatic cycling of the machine is interrupted, Mn (FIG. 4) being released. By closing its make contact 1141"1 the relay G14r furthermore operates the relay G15r, Which then lights the so-called end of run lamp ER (FIG. 3) when closing its contact g15r2. The relay C1151' remains locked through its closed make Contact g15r1. The break contact c2r of the relay C2r being open, the paralleled relays Bar, B11r and B1611 (FIG. 2)
  • the information leaving the tctrad Rt (FG. 5) is transmitted to the shift register ML1 (FIG. 5) by means of the monostable multivibrator M89 (FIG. 6) acting as butter circuit which is triggered each time an advancing pulse deionizes the tube f; of the tetrad RT, i.e. when the latter tube was previously tired.
  • the pulse of 50 ps. is then fed through the AND gate g2g (FIG. 6) the other input lead of which is activated by the reading authorization signal, and the mixer m21 (FIG. 6) to the tube 1 of the shift register ML1 which is then tired. Due to M59 being in its stable condition, except only when triggered from stage 4 of Rt, gate g2g cannot allow the passage of any undesired signals.
  • a supplementary so-ealled Had signal is also applied to the gate gm.
  • this signal is only high when a complete decimal dig't is entered in the shift registers, as will be explained later, the output lead of the gate g1g is accordingly activated only when the actual stop symbol is stored in tubes :il to 4d. This takes care of false stop symbols produced by the end of a digit and the start-of the next. Consequently the common input lead of the AND gates g11 and g1g is also activated.
  • the corresponding following B pulse will be the last to eventually pass g3 since it will now pass through LQ11 to trigger the monostable multivibrator M54 for 8O msecs. and block gate gm.
  • the following A pulses for thc digits of the amount will be prevented from passing through gm, and the first of these will instead pass through g1g to reset M33 to its stable condition and therefore block gs-
  • the advancing pulses being still applied to the shift registers, the information of the ead cheque continues to be serially stored in these registers. Its complementary form is completely transmitted therein when the complementary form of the stop symbol (100i) appears in the tetrad Rt, and thus the iirst recording of the information pertaining to the new cheque has now been read.
  • the relay B131' By closing its make contact b13r2, the relay B131' operates the parallel connected relays B111r, F1r, C1Gr and D161' (FIG. 2) which are then locked through the closed make Contact d151'2. By closing its make contact f1r, the relay F11' lights the so-called no read lamp NR (FIG. 3). By closing its make contact b1Gr1, the relay B101' provides an additional operating circuit for relay A11r which was already operated through make contact (1111's due to the operation of relay Agr at the beginning of the reading authorization.
  • the relay B111r By closing its make contact b111r2, the relay B111r operates the parallel connected relays C21' and Cgr.
  • the break contact Car being open the locking circuit of the relay C161' is opened, this relay releases, and the total key TK (FIG. 3) is made effective.
  • relay Agr releases, followed by the release of relays A121', A111' as vell as the temporary operation of relay A11', the release of relay A31', and in turn of relay A61'.
  • the reading operation is finished when the normal form of the stop symbol is stored in the tetrad Rt.
  • the output loads of the tubes of this tetrad constitute input leads of the AND gate gm, the signals appearing at the tubes 2 and 3 being previously inverted by the inverters i1; and 1'13 respectively.
  • a supplementary signal, the above mentioned Had signal, is also applied to the gate g11.
  • the output lead of the gate 17 is activated since the Had signal is high. As it is applied to the coil of the relay A11r after having passed through the inverter' i11, the latter relay A111' is released.
  • relay A12r is still operated, as mentioned above (Contact b111r1), whereby relay A51' cannot be operated.
  • relay Amr upon the release of relay AG1', relay Amr will be temporarily operated while condenser C1 is charged.
  • relay Aer requires, starting from the release of relay Agr, the operation of relay A1r and the release of the relay Aar, while the operation of the relay A5r only requires, starting from the release of relay Agr, the release of relay A111r.
  • the relay A51' (FIG. l) is then operated as follows:
  • the relay D201' (FIG. 2) is then temporarily operated during the charge time of capacitor C1 through the closed make and bre l; contact 1:51'2 and :1.11'1 respectively. Ey closing its make contact c1201' and the relay Cgr being unenergized since no discrepancies were previously detected, the parallel connected relays B111', B111' and B151' (FIG. 2) are operated through the closed break contact C21'. By opening its break contact [216.”1, the relay B161' makes the Start SK ineffective, while by closing its make contact L'mrg, it operates the relay B111' (FIG. 2) which locks itself through its contact burg. By closing its contact by'.
  • the relay B111' cnergues the (FG. 2) through tlze closed break Contact cr.
  • the relay C151- applies an impulse to the single pulse generator SPG1 (FIG. 7).
  • This single pulse generator is designed to produce a single signal of 300 microseconds which cannot -be aiected by eventual contact vibrations of relay C151' during .the period of this signal. It activates a common input lead of the AND gates g1 and g2. Before describing the eiiect of this signal, the production of local pulses of 5 kc./s. will be described.
  • the system is provided with a stable multivibrator As (FIG. 6) with built-in output diterentiators, which produces a iirst series of pulses, called C pulses, at 200 us. intervals, and an identical series of D pulses with the same Ifrequency .but phase shifted by a half period of l() us.
  • the C pulse are continuously applied to the input lead of the AND gates g1, g2 (FIG. 7), g2, g4, g5 (FIG. and g25 (FIG. 6), while the D pulses are applied to the AND gate g26.
  • cheques processed one by one with the automatic or single feed key in the single feed position including the irst cheque processed with the key in automatic feed position, and the second, :third cheques processed with the key in the automatic feed position.
  • the complete information stored in the shift registers has to be transmitted to the adding machine, while in the second case, only the amount has to be transmitted therein.
  • an account number provided with at least one non-significant Zero digit is stored in the shift registers.
  • a zero as highest signiiicant digit is stored in the last tetrad of 4the shift register ML2 (tubes 41 to 44).
  • the output lead of the AND gate g2 is activated, and this signal is applied through the mixer m3 to the gate g2. Since both the input leads 1 and 3 of the gate g2 are thus activated, while the signal pulse lasts, the iirst arriving C pulse is able to trigger the monostable multivibrator MSB through the mixer m19. This monostable multivibrator delivers a high signal during ms.
  • This signal is Yfed ⁇ through the mixers m13 and m15 in cascade to the input lead 1 of the AND gate g2g. Since the input lead 2 of this gate g2g is activated, the inverse signal of the reading authorization signal being applied thereto, D pulses are permitted to be ted through the gate g26, the mixer m11, and the delay element D3 of l0 its. to the monostable multivibrator M812 which produces advancing pulses of us.
  • gate gq will in fact no longer deliver a signal, but the output of inverter i12 constituting the inverse Had signal, still provides an activating signal through mixer m2, until the 4 binary digits of the iirst account number digit, distinct from 0, are stored in stages 4i to 44. Indeed, at that moment, the output lead 1t of the mixer m3 is deactivated. This signal is applied to the inverter i1 (FIG. 7) and further fed through the mixer m1 to the gate g4, the other input lead of which is activ-ated dueto the above mentioned (pria) signal.
  • relay Bqr (FIG. 2) is operated.
  • the operation of this relay indicates that all the digits of the account number still stored in the shift register ML2 may be transmitted to the adding machine.
  • Both relays B51' and B81' are then locked through the closed break and make contacts 1121'1 and b81'2, respectively. These relays thus keep into memory the operation of relay Ber.
  • the digit stored in the last tetrad 4l4d of the shift register ML2 is noW set up in the adding machine by means of a self-checking decoding circuit.
  • the adding machine is provided with a single series of ten digit solenoids (0 to 9) and with a series of print bars corresponding to the different digits that have to be printed after having been successively set up. Each of said solenoids is able to actuate a so-called stop member, and ten such stop members are provided per print bar.
  • the adding machine is moreoevr provided with a so-called distribution bar which may be placed in a position corresponding to the rank of the digit to be printed i.e. corresponding to a print bar.
  • the adding machine is naturally provided with a totalizer such that c g. an amount set up in the adding machine may be added to the previously obtained total of amounts.
  • the operated relays D101' and D151' respectively release the parallel connected relays E101', E101', E111', E191' and E141', E101', E111', E101' (FlG. 3). ln this manner the following circuits are closed for the adding machine digit solenoit 3 (FIG. l).
  • the relay D11' has however been operated in a manner described above, so that a common ground L/:1 is siinul taneously given to thc relay D101' and the solenoid 3 through the closed make contact 1111' and the closed break contacts c11'1 and c31'1 when no discrepancies were previously detected.
  • the corresponding stop member S is then actuated by the operated digit solenoid 8, which also closes one (mi) of the above mentioned and parallel connected top contacts (111'0-1110 on FIG. 2).
  • the parallel connected relays C11' and D101' are operated (FIG. 2) and locked through the closed break and make contacts c131'2 and 6.11'2, respectively.
  • the relay C131 is operated only when four advancing pulses are transmitted ⁇ to the shift registers.
  • the relay D101' is not operated and when the relay D101' is operated in a manner described above, the parallel relays B101', F11', C10r and D101' (FlG. 2) are energized through the closed make and break contacts 1181' and d121'1, respectively.
  • the parallel relays B101', F11', C10r and D101' (FlG. 2) are energized through the closed make and break contacts 1181' and d121'1, respectively.
  • the closing of the Contact 1110111 these relays are locked, while by the opening of the closed break contact (1101'1, the operating circuit for the relay D11' and D11' is opened.
  • These relays thus release, and so digits solenoids can be energized, the make contact d11' being opened.
  • the machine is then stopped and the no-read lamp NR is lighted.
  • the total key is further rendered effective, the relay C101' being released.
  • the operator may then depress this key, which, in a manner which will be described later, will cause the information to be wiped out from the register'.
  • the single pulse generator SPG1 may include an input cold cathode tube which is tired by the application of ground, produces an output anode pulse to drive an output monostable circuit, and is deionized automatically by a time constant circuit in its anode circuit, in SPG2 (FiG. 6), said cold cathode tube remains ionized and may only be deionized by opening its cathode lead (conductor k).
  • the cold cathode tube part of the single pulse generator SPG0, may be ionized, and when the break Contact c1111 is opened, due to the operation of relay C111', the cathode circuit k of said tube is opened and the latter tube is deionized.
  • rIhe input lead 2 of the gate 1.15 being activated during 390 as., at least one, and at most two, C pulses of 200 11s. period are permitted to be fed through this gate.
  • the lirst of them is applied to the monostable multivibrator M511 which is triggered and activates during 400 11s. the input lead of the gate ,120 through the mixers m11 and 11115, so that at least one D pulse is applied through the gate 120, the mixer 11111, and the delay element D3 of l0 11s. to the monostable multivibrator M511l which produces advancing pulses of 25 11s.
  • bistable devices B83 and B51 are arranged as a counter-of-4 with BS3, the input bistable device, driven by the rear edge of the advancing pulses.
  • bistable devices B83 and B81 when power is initially applied to the circuit, they are now both in condition 0, since otherwise a signal passes mixers 11111 and 11115 to authorize gate 120 to send D pulses to produce advancing pulses. In this manner, the input lead l of the latter gate 1.10 is activated during 735 11s. (FIG. 9) in total, so that exactly four advancing pulses are produced, which are applied to the shift registers. After the fourth pulse, both BS0 and BS.1 are again in condition 0, and since M811 is now back to normal, the generation of further pulses is stopped.
  • the information thus leaving the tube 44 of the last tetrad of ML0 is applied to the monostable multivibrator M81 (FIG. 6) which is however only triggered when a 1 digit leaves said tube ⁇ 44.
  • the thus produced 50 11s. signal then may he fed to the tube 1 of the recording tetrad Rf through the AND gate 72,1 and the mixer 11110.
  • the other input lead of this gate g1 is constituted by the output lead of the AND gate 123 which delivers a Ihigh signal, since bot-h its input leads are activated, due to the reading authorization being removed and the relay D1.1r being released (-25 volts, i.e. an inhibiting signal at input of inverter i6).
  • the information is further transmitted through the monostable multivibrator M59, the gate g21, and the mixer m21 to the tube 1 of the shift register ML1 in a manner already described above.
  • the output lead of the mixer m14 is activated during 600 as. i.e. during the generation of :the last three advancing pulses.
  • the signal appearing at the left output lead of the bistable multivibrator BS4 is applied, together with the signal appearing at the left output lead of the bistable multivibrator B83, to the gate g2g which thus delivers the so-called Had signal that is able to operate the monostable multivibrator MS10 at the end ⁇ of :the fourth advancing pulse, i.e. when b-oth BSS and B81 again reach their 0 conditions together.
  • the resulting 35 ms. signal then operates the relay C13r so that the parallel connected and previously operated relays C11', D181' are released by the opening of the closed break contact 01312.
  • the other digits may now be successively set up in the adding machine, the information stored in normal form being recirculated, all in the manner ⁇ described above.
  • the sorting prefix and the account number are completely set up in the adding machine at the moment the normal form of the stop symbol is stored in the tubes 37 to 40 of the shift register ML1.
  • the sign of amount is then stored in the last tetrad of the shift register ML2.
  • the relay C11' Since the operation of the relay C11' removes the ground from the contact d11' (FIG. l), when opening its break contact c11'1, no digits can be entered into the adding machine, so that the sign of amount stored in the last tetrad of the shift register ML2 cannot be set up in the adding machine.
  • the relay C1r By closing its make contact c1112, the relay C1r further operates the relay D31'.
  • the ground from the home position contact HPC of the printer is brought on the relay C11r, which further operates C14r, so las to produce a series of four advancing pulses that shift the sign of amount out of the las-t tetrad of the shift register.
  • the home position contact HPC of the printer is a change-over contact which takes a position, as shown on FIG. 2, only when the printer is at rest.
  • gate g5 delivers a pulse which passes through mixer m20 to trigger the nionostable circuit M38 back to its stable condition. Operations will then proceed, as described in the case of single feed.
  • the relay E21' By opening Iits break contact e21'1, the relay E21' removes the ground from Lk1 (FIG. 2) thus releasing all the relays locked on Lk1, while by closing its make contact e2r2 it energizes the relay C61' (FIG. 2), so that the charged capacitor C3 is discharged by the closure of the make contact ⁇ 061'2 in a manner ⁇ analogous to that described for the capacitor C1 (circuit of relay A151').
  • the relay C61' afterwards releases, the printer being again in its home position (HPC closed), the relay C11' will be temporarily energized during the charge-time of the capacitor C3. It thus releases the relay C101', in case of single feed (AF1 open), and makes the total key effective.
  • the relay C51 By opening its break contact c5r, the relay C51 opens the circuit for the relay C151' so that the single pulse generator SPG1 may no longer be operated. In this manner the corresponding input leads of the gates g1 and g2 rnay no longer be activated.
  • the sorting prefix, the account number and the sign of amount are notwset upV in the adding machine and the printer need not be operated.
  • the sor-ting prefix ⁇ and the account number are set up in the adding machine and the printer is operated for printing this information.
  • the information stored in the adding machine is printed. After this is finished, the ystoring of digits in the adding machine may then continue in a manner describedv above.
  • the nonsigniiicant zeros of the Iamount are then also prevented from being printed, as described with regard to the sorting prefix and the account number.
  • the stop symbol arrives in the last tetrad of the shift register ML2.
  • the output leadof the gate gso is then activated and this signal is applied through the mixer m11 to the gates g4 and g5.
  • the advancing pulses will be stopped as follows.
  • the first arriving C pulse then resets the monostable multivibrator MSE, through the gate g5 while in the case of single feed, it is reset by -a C pulse fed through the ygate g1.
  • the output signal of gate g2g also operates the relay C3r. Due to opening of its break contact 0211 no digits can be set up in the adding machine, since the ground is removed from the circuit of the digit solenoids (FIG. l). By closing its make contact 031'2 the parallel connected relays A131', D41' are operated and also the relay A21' but only in the case of automatic feed, the contact AF, then being closed.
  • the relay D11' energizes the add electromagnet AM (FIG. 3) as follows:
  • the relay D41' By closing its make contact d41'1, the relay D41' operates the relay C111' through the ground of the home position contact of the printer. Thus a series of four advancing pulses are applied to the registers, shifting the stop symbol out of these.
  • the printer motor is started, the information (i.e. the amount) stored in the adding machine is printed, while it is stored in the totalizer.
  • the relay A131' By closing its make contact 11131', the relay A131' operates the feed electromaguet FM (FIG. 3) which commands the removal of the document carrier positioned in the reading stage.
  • the relay A21' only operated in case of automatic feed, acts nearly in the same manner as did the relay A11' when processing the first cheque, so that another document may be brought in the reading position. No circuit is then closed for the operation f the relay B41' which thus remains released.
  • the add electromagnet AM When the add electromagnet AM operates, it closes its top contact Epe so as to operate the relay B5r which causes the relays B91', B111', B16r, A15r and eventually B21', B41' to release.
  • the relay B31' (FIG. 2) is operated through the closed half cycle contact hcc, thus unlocking the parallel connected relays B61' and Bar when opening its break Contact B31'.
  • the parallel connected relays E31', D141' and F11' are operated.
  • the relay D141' activates the input lead of the gate gg through the mixers 11113, m15, so that advancing pulses are applied to the shift registers. Since the relay D141' is operated more than 20 ms., it is assured that enough advancing pulses will be applied to the shift registers to clear them completely.
  • the relay E31' operates the total electromagnet TM.
  • each of the bistable multivibrators B51 and B52 takes place by the removal of the 250 volts, leading to an increase of the resistance (due to the removal of a short-circuit) in their anode-grid potentiometer circuit and a consequent triggering of each of the devices in a predetermined condition.
  • the electromagnet TM causes the adding machine to produce the total of the amounts and initiates another cycle of the printer mechanism which prints the thus obtained total.
  • By opening the break contact e311 the ground is removed from Lkz, thus resetting all the relays locked on Lkg.
  • a system for decoding digital information recorded on documents comprising:
  • (1') verification means coupled to said register, said receiving means, said first control means and said comparing means for producing a verification indication during the redundant transfer of said second form of said information from said receiving means into said register, thereby producing an indication of malfunction whenever said shift register is improperly operated or whenever said second form of said information does not precisely correspond to the previously transferred first form thereof.
  • a system according to claim l including:

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US2954166A (en) * 1952-12-10 1960-09-27 Ncr Co General purpose computer

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Publication number Priority date Publication date Assignee Title
US2954166A (en) * 1952-12-10 1960-09-27 Ncr Co General purpose computer

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