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Summary of Contents for ELECTRONIC MULTIPLIER

Page 1: ...N C H E D C A R D ACCOUNTING MACHINES CUSTOMER ENGINEERING MANUAL OF INSTRUCTION ELECTRONIC MULTIPLIER T Y P E 603 I N T E R N A T I O N A L B U S I N E S S M A C H I N E S C O R P O R A T I O N N E...

Page 2: ...by Department of Education International Business Machines Corporation Endicott N Y Copyright 1948 International Business Machines Corporation 590 Madison Avenue New York 2 2 N Y Printed in U S A Form...

Page 3: ...RCUITS Time Delay Circuits Start Circuit and Bias Interlock Start Interlock Circuits Gang Punching Only Start and Running Circuits N o Cards in Machine Start and Running Circuits Cards in Machine Read...

Page 4: ...Feed Hoppar Start Stop Keys Joggle Plate Read and Punch Unit Electronic Computing Unit E L E C T R O N I C M U L T I P L I E R T y p e 6 0 3...

Page 5: ...it for reading and punching and an electronic computing unit connected by a cable This key is depressed to start the feeding of as shown by the general view of the machine on the cards at the beginnin...

Page 6: ...fields Cards are placed in the card hopper face down current 9 edge first The capacity of the hopper is approxi This machine is supplied to operate only on 115 mately 800 cards volts or 230 volts A C...

Page 7: ...Figure 2 Control Panel Explanation o f Hubs...

Page 8: ...hen the punching has been checked in the be retained in the product are wired from Product original run the double punch and blank column Exit to Punch Entry detection feature may then be used in a se...

Page 9: ...carry the group multiplier if the factor reversal switch is set ON The multiplier must be punched in a card designated by a 9 punch and placed at the front of each group The multiplier counter will n...

Page 10: ...then be processed man ually The necessary control panel wiring is shown by wiring 8 in Figure 3 A 12 is punched in column 70 of the card with an overflow product Figure 3 Product Summary Often it is d...

Page 11: ...press punching in a card the card is either X punched or punched with a control digit in a specified column The control punching hen causes the suppression of punching on that card with proper wiring...

Page 12: ...ign may be indicated by an X punch Any column may be used for the X punch indicating the sign of a fac tor but preferably it should be the unit column of the factor field Wiring for sign control is sh...

Page 13: ...n of the product is taken through the column split hub because of the X punched over the units position in negative products Figure 6 Multiplication and Checking with Sign Control punch the punching o...

Page 14: ...rough 11 show the location of all parts and units which are visible at a glance Certain other features not readily visible must be illustrated schematically The front view Figure 7 shows the card leve...

Page 15: ...rmit access to the rear of the cable connector the frame on which the cable connector and the selenium rectifier are mounted can be swung down if the latch holding heframe in place is released The sel...

Page 16: ...The glass fuses are in the punch circuits and in the tube power supply circuits The conventional arc suppressing capaci tors are mounted between the relay brackets and above the half wave selenium re...

Page 17: ...0 volrs and 250 volts for the operation of tubes in the electronic unit The main transformer supplies A C of proper voltage to the 40 volt and 140 volt selenium rectifiers it also supplies the filamen...

Page 18: ...second set of feed rolls The punch brush 2 card lever is mounted directly above the punch brush 2 contact roll However all card lever contacts are mounted on a plate at the front of the machine as sh...

Page 19: ...ing Station I Punching Station I I Entry and Control I I Reading Station Checking and I Gang Punching I Figure 12 Schematic of Read and Punch Unit Stacker H Chassis M Chassis N Chassis Product Input l...

Page 20: ...punch bail The operation of this bail is discussed in connection with the principle of punching The geneva drive gear operates the geneva and geneva pawl and also the punch clutch idler gear and shaf...

Page 21: ...P R I N C I P L E S 17 I I X Chassis Gate Stop Rod Cover i Block All Chassis Terminals are marked Figure 15 Electronic Computing Unit with Gates Open Punch Brushes2 Eccentric Shaft Figure 16 Schematic...

Page 22: ...rincipal parts of the clutch are a continuously running one tooth ratchet a clurch pawl a latching mechanism and a magnet The magnet provides a means of electrically controlling the operation of the c...

Page 23: ...s under cycle poifzts The most logical unit of division is the control of a complementary cam and follower the distance between successive punching positions mounted on the punch clutch shaft Figure 1...

Page 24: ...position The geneva disc has seven deep slots and seven shallow cuts in it The roller of the drive gear operates in the deep cuts in the geneva disc and the cam surface rides in the shallow cuts As th...

Page 25: ...eneva disc has 7 cuts in it and moves the card one cycle point for each cut The machine is a fourteen point cycle machine therefore the gen eva disc must make two revolutions per machine cycle which m...

Page 26: ...the return stroke the punch is positively withdrawn from the card by the ac tion of the punch bail The purpose of the knock off bar is to disengage the interposer from the punch bail tongue As the int...

Page 27: ...t and not according to the column of the card as placed in the gang punches It can be seen that the inter posers have been relieved to provide a space be tween them This space prevefits the interposer...

Page 28: ...geneva and gears The rotor is pivoted off center in the housing as shown in Figure 27 The expansion chamber at the inlet provides a vacuum and causes the oil to enter the pump from the well below The...

Page 29: ...ronze cam This cam strikes the contact latch lever and unlatches rhe contact plunger In this manner the contact duration may be adjusted There is a maximum of 41 cams and contacts mounted in the P cam...

Page 30: ...plate in elongated holes to provide for 008 to OIO clear ance between the armature and cores when the latch is against the stop screw Figure 3I There should be 003 clearance between the keeper and th...

Page 31: ...pproximate adjustment may be obtained by setting the bracket so that the locking screw is about one third of rhe way up from the bottom of the elongated hole Figure 33 Geneva Clutch A two pawl geneva...

Page 32: ...The ltnife must project evenly all the way across and both knives must be adjusted for the same condition After a period of use the knife blocks may wear particularly at a point near the feed knife i...

Page 33: ...held parallel to the card line Tighten these guides or they will bind and make it difficult the rhroat knife and check to see that a OlO to remove the die gauge will not enter the throat from any ang...

Page 34: ...Remove the front punch bail connecting link pin 2 Turn the machine until the punch bail is in the extreme upward position eccentric up Figure 37 Punch Magnet Armature Adjustment 3 Adjust the rear punc...

Page 35: ...s and separators can be moved to the front or back if the three locking screws in the slide assembly are loosened Figure 38 Scribed Lin A d Holding Screws Figure 38 Brush Slide Assembly Common Brush A...

Page 36: ...magnet unit for the pro per vertical alignment as in the above adjustment recheck for the slight clearance between the punch bail tongue and the interposers when the punch bail is at the top of its st...

Page 37: ...ontact ter minal block and the contact strap to provide O15 to 018 air gap between the contact points Fig ure 43 4 Check to be sure that the plunger does not bind The design of the split bushing is su...

Page 38: ...ell of the cam and the plunger On the non latch type rhere should be a 003 minimum clearance between the low dwell of the cam and the contact plunger when the plunger is against its stop Figure 47 If...

Page 39: ...atching cam screws Figure 46 Turn the machine to the proper index point and move the unlatching cam in its slot until the contact opens Tighten the holding screws There are six possible positions for...

Page 40: ...two primary coils and more terminals are necessary In these ma chines there are 24 terminals on the main trans former and 15 on the tube power supply chassis The terminals designated as CN for exampl...

Page 41: ...sts of two strips of different metal placed one on top of the other and bonded together These two metals ex pand at a different ratio when heated and hence the strap will bend A coil of high resistanc...

Page 42: ...2 sup plies minus 100 volts or 100 volts belotv grozl d making the voltage between C H 2 and CH4 250 volts Terminal C H I supplies minus 250 volts Each of the power lines is protected by a 2 amp glass...

Page 43: ...imultaneously completes a circuit to the P clutch and HD1 motor relay Circuit for the P clutch is as follows post 3 fuse 5 punch clutch coils RlOBU P16 cam contact to PI and post 1 This circuir ener g...

Page 44: ...e contacts is opened Reading Brush Circuits R8B contact is used in the read for entry and control brush reading circuit while R7A contacts are similarly used in read for gang punching and checking bru...

Page 45: ...s picked up R26A points transfer and either the multiplier or the multiplicand counter depending upon the setting of the factor reversal switch is cleared by PI2 under further control of R27 3 points...

Page 46: ...to CNp28 Section 4A P14 to I40 volt terminal Punch Suppression If it is desired to suppress punching in a card the card is either X punched or punched with a control digit in a specified column The c...

Page 47: ...on 8A are closed to permit read out from the product counter and R19A points Sec tion 5A are open to permit cancelling the product counter when PI1 opens Thus an X or digit punching will cause normal...

Page 48: ...iplier enrer the multiplicand and vice versa R24 reverses the multiplier and multiplicand read in control and cancel circuits on a group multiplying setup while R25 is used in connection with sign con...

Page 49: ...ication of a group of cards by rhe same multiplier The multi plier factor is unchedin the first card of each group and is known as the rate card or lzaster card The rate card is identified by a 9 punc...

Page 50: ...ing is shown in Figure 50 This in con sequence chart should be studied carefully nection with the group multiplying circuits In the following circuits it is assumed that the factor reversal switch is...

Page 51: ...split to separate the O from the X The Hot 1 hub provides a source for a 1 impulse under control of P20 cam contact Section 7A This may be used to punch 1 s or to enter a 1 into the electronic counter...

Page 52: ...set of brushes and the X hole is read R96 would be energized if there were an X identifying a nega tive multiplier R95 holds through its holding coil R95AU and P39 until 5 of the following cycle and R...

Page 53: ...ct X were punched Since the assumption is that no product X is punched R99 is not picked up R96 holds through its R96H coil R96AU points and P39 until 5 of the nexr cycle R96B points set up the circui...

Page 54: ...rol is de sired the D hub is used to pick R8O R8O holds through its R80H coil R8OA and P21 until 14 of the cycle following its pickup At 13 6 of this same cycle R81P is energized through R80B and P22...

Page 55: ...tron 3 HD4 points primary terminal 17 primary coil terminal 19 for 115 volt supply fusetron 4 to post 7 The RMS or effective volxage pro duced at fz llload by transformer action between each of the s...

Page 56: ...h dotted section in Sec tion 4 of the main wiring diagram The tube power supply transformer for 115 volt A C oper ation is provided with taps on the primary in 5 Transformer volt steps to permit const...

Page 57: ...tred lines between the primary and secondary windings in Figure 54 The purpose of these electrostatic shields is to prevent any high frequency transients in the A C line from being passed to the secon...

Page 58: ...s for the 100 volt line the voltage ratio regulator circuit provides a regu lated 50 volt drop Btforc discussing the voltage replator the rec tifier circuit for the 250 volt bias supply will be discus...

Page 59: ...along with the heater for the 2526 rectifier are connected in series across post 12 and post 13 100 volts A C is available across these terminals of the main transformer All componenxs of this regu l...

Page 60: ...87 5 and the current through the tube will be consider volt line thus producing the desired result An other way of looking at this is that the decreased tube current results in a decreased IR drop acr...

Page 61: ...hat the proper anode cur rent flows at all times to maintain this 85 volt drop This is done by adjusting the grid potential of the 25L6 s Note that all the grids are connected to gether to the anode o...

Page 62: ...istors These resistors also provide more stable tube opera tion The 8 mfd capacitor across the 65 volt line serves as a filter with the 10 000 ohm resistor R e as its bleeder Rc serves the purpose of...

Page 63: ...order of column shift ing is immaterial as the final result will be the same regardless of rhe order in which the multiplier factors are taken In the 603 multiplier column shifting is from the 6th mul...

Page 64: ...establish the basic adding cycle one to c0un t adding cycles and determine when to column shift and one to count column shift cycles These three pulse counters are called the primary timer secondary r...

Page 65: ...ad vances 1 to indicate that one adding cycle has been completed When 10 adding cycles are completed the secondary timer carries and a pulse is passed to the tertiary timer to signal a column shift Wh...

Page 66: ...into the it started When the counter position goes from Proper Position of the Product counter during the 9 to 0 a signal is provided to start adding the rnul first adding the last tiplicand on the ne...

Page 67: ...0 0 2 0 1 6 5 2 3 1 6 0 0 0 0 3 0 1 6 5 2 3 1 6 0 0 0 0 4 0 1 6 5 2 3 1 6 0 0 0 0 5 0 1 6 5 2 3 1 6 0 0 0 0 C S 6 0 1 6 5 2 3 1 6 0 0 0 0 7 0 1 6 5 2 3 1 6 0 0 0 0 8 0 1 6 5 2 3 1 6 0 0 0 0 9 0 1 6 5...

Page 68: ...he tenth add ing cycle During the 6th adding cycle the mul tiplier position advances from 9 to 0 This provides a signal to the multiplicand to add into the product once during each of the 4 remaining...

Page 69: ...e wave oscillator generating essentially square waves of 3 5 000 cycles per second frequency The clipper clips the mul tivibrator output to square the top of the wave and its output is fed to the A an...

Page 70: ...circlas rrirr lo challis Read in and rrad out pul8r8 in lynchronilm with cord movrmrnt High spcrd pulse8 originating at multivibrotor Unlocking ond locking control8 Figure 64 Block Diagram o f Type 60...

Page 71: ...ft position and B pulses start adding into the product counter The 10th rolling pulse then closes the column shift switches through the stop pulse control and the product counter will have received as...

Page 72: ...ce the 65 volt line is placed above the I YO volt line on the cir cuit diagram In addition to the color coding used on all the power lines all controlled grid and suppressor cir cuits are indicated by...

Page 73: ...diagrams The screens of 25L6 s require a resistor in the circuit to limit the screen current Resistors are used in the screen circuits of 6SK7 s only to prevent parasitic oscillations when several sc...

Page 74: ...oltages Transient voltages are very rapid voltage changes resulting from load changes fluctuation in supply voltage arcs resulting from breaking inductive circuirs etc Transients can cause parasitic o...

Page 75: ...al elementary principles will be reviewed and several basic circuits which will facilitate later cxplana tionswill be discussed In all the electronic circuits voltages are referred to the cathode The...

Page 76: ...when when conduction takes place can be utilized to T I is conducting is 50 volts It is desired to a 4 control another tube by connecting the grid of the bias T2 at 25 volts hence EgZ must be a 75 vol...

Page 77: ...d the total potential across R1 and R2 is 2 50 volts 1FO to 100 This means a 125 volt drop across each resistor and a potential of 25 volts at the grid of T2 so that T2 conducts Actually the grid of T...

Page 78: ...ly chajzges in potential will be transmitted through C Once point A I reaches a steady value of potential no further effect is felt at point G2 With T I conducting the steady state potential at A1 is...

Page 79: ...le to block the action of the controlling tube under certain conditions This can be done by con necting two controlling tubes in parallel with a common load resistor and providing separate grid contro...

Page 80: ...he potential asttheir anodes will be YO volts This will place the suppressor at 50 volts which is determined as follows Total potential across R l and R2 is 300 volts from 50 volts to 2 50 volts Suppr...

Page 81: ...pply The capacitor C across R I is necessary to balance the imerelectrode tube capa city so that the grid of the tube can follow the ap plied potential without any time delay TRIGGER CIRCUIT fixed val...

Page 82: ...w radio frequency range depending upon the circuit constants used Thc tubes used in the circuits illustra ted in Fig ure 73 are 6JY s or the equivalent The two triodes can just as well be the two halv...

Page 83: ...by 100 volts making point A1 100 volts more negative than it was previously In practice this potential at point A1 is 40 volts instead of 38 volts with T 2 conducting since the current is not exactly...

Page 84: ...e pulses a pulse is applied This circuit is designed to trig When a negative pulse of 20 volts with a steep ger on the application of a 20 volt negative pulse wave front is impressed across the input...

Page 85: ...potentials shown in Figure 77 in parenthesis would soon change TO those shown in Figure 78 The shown in Figure 78 exist with the input coupling capacitors Ci in equilibrium with capacitors Cc not yet...

Page 86: ...at 8 volts therefore conduc tion will start as soon as a grid goes above this potential Hence TI starts conducting and blocks TZ from conducting as previously explained and the trigger is reversed The...

Page 87: ...id abour the ability of this trigger circuit to distinguish between posi tive and negative pulses The constants of this trigger are such thar it is considerably more sensi tive to negative pulses than...

Page 88: ...ositive pulse to trigger The circuit the pulse must be sufficiently positive to overcome the initial bias plus the negative swing produced at the grid of the non conducting rube by the dip in anode po...

Page 89: ...nstant will be the same for both grids D The exponential rise of potential on both grids will be as shown graphically in Figure 83 These I I P I I I S tubes cut off ar 8 volts hence conduction will st...

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Page 96: ...nductive and conducts only when trigger S is ON This arrangement operates exactly as shown in Figure 89 up through the ninth pulse Then on the tenth pulse trigger 8 must be turned OFF and trigger 2 mu...

Page 97: ...k diagram form in Fig ure 92 The details of the carry circuit are des cribed in a la ter section after the computing cir cuits have been described Pulses may be delivered to a counter at the com parat...

Page 98: ...ach time trigger 1 goes ON a 5 0 volt positive pulse is produced at the anode resistor tap of tube 1 of trigger 1 However this positive pulse is not rec ognized and consequently can be ignored Each ti...

Page 99: ...tter of opening the 100 volt cancel line This applies I jO volts to the right side of all the trig gers and they are all turned OFF thus restoring the counter to 0 Cancelling is always necessary befor...

Page 100: ...king Tube Tube 10 A Front View Showing Indicator Block Carry Output 5th Counter post 21 Indicator Position Light Socket Tube Socket 4 Tube Socket 1 Input 5th Post 1 Counter Position Carry Output Posit...

Page 101: ...e high speed triggers Since counter read in may be at either high or low speed it is necessary to employ high speed triggers throughout Indicator Blocks Neon indica tor lights are used throughout the...

Page 102: ...o a switch tube The pulses from the CB s have no effect however until the switch is un locked by the trigger and consequently no nega tive pulses can pass through from the switch tube to the counter u...

Page 103: ...ugh Rg in addition to the normal bleeder current causes an increased IR drop across Rg and point G rises above cutoff for tube 2 of the trigger so that tube 2 of the trigger starts conducting Immediat...

Page 104: ...presents a means of producing equal current flow through all tubes used in paral lel For example one tube s characteristic may post I be such that its screen and anode current during conduction are h...

Page 105: ...and P6 making it makes no D difference if they do open and close because of a bounce The trigger cannot be turned OFF by opening P5 and P6 it can be turned OFF only by P7 and P8 closing Likewise once...

Page 106: ...high speed pulses to roll the multipJi cand counter originate in the B chassis and are fed in r o post 2 through the 250 mmfd coupling capacitor to the input inverters D5 Dl I and D14 The grids of th...

Page 107: ...in circuits showing all tubes for all counter positions COMPUTING CIRCUITS Multivibrator and Clippers After the multiplier and multiplicand factors have been entered into their respective counters the...

Page 108: ...ases the IR drop across RL1 and thereby reduces the poten Cce Discharging TI Conducting tial at the anode of TI This reduction in poten tial is transmitted through Ccz to the grid of T 2 The reduction...

Page 109: ...tly the two sides of the multi vibrator must be symmetrical The voltage across RL1 rises and falls exponent ially because of the charge and discharge of Ccz If RL1 is sufficiently small in comparison...

Page 110: ...in grid potential during the posi tive half of the cycle is more rapid than during the negative half This is explained also by the flow of grid current When grid current is flowing in T 2 the grid re...

Page 111: ...rpose of rhe batteries El and Ez is to establish the voltage amplitude at which clipping occurs In practice these would be replaced by capacitors A triode clipping circuit is illustrated in Figure 103...

Page 112: ...not be re flected in the output of T2 and a true square wave is obtained at the output of Tr as indicated in Fig ure 1O4C Bear in mind that the waveforms shown in Figure 104 are theoretical Practical...

Page 113: ...es is to permit a switch to be conditioned prior to sending any pulses through it Thus a B switch may be conditioned by an A pulse and rhen B pulses are passed through it The purpose of the 5Ommfd cap...

Page 114: ...cycles Each timer is merely an electronic counter the reading of the counter at any point determines the point in the computing cycle Thus if the primary timer reads 5 it indicates that 5 pulses of th...

Page 115: ...r into a counter once Since over and over ad dition is used to multiply it means that the multi 1 plicand may have to be rolled into the product counter as many as nine times This means at 2 5 least n...

Page 116: ...A322 tube drops and a negative pulse is rransmitted to A31 trigger OFF side from a tap on rhe load re sistor of A322 A31 is thus turned ON and the grid of tube 2 rises to cathode potential as does th...

Page 117: ...timed by the res toration of A32 which is under control of a cam in the punch unit It is necessary however to terminate computing operations under control of the computing circuits for this reason tr...

Page 118: ...mary cycles The timing relation ship existing between the primary and secondary timers is shown in Figure 108 A careful study of this timing chart is essential to the proper under standing of the sequ...

Page 119: ...e multiplier ad vancing pulse at 12 is shown in the A chassis cir cuit Section 24A and consists of trigger A35 and power tube A36 Note that indicator light 7 in socket A13 shows the status of A3 5 Fig...

Page 120: ...follows the top of the j6 megohm resistor is tied directly to the anode of the column shih control tube in the M chassis The potential at this anode is less than 50 volts while this tube is conductin...

Page 121: ...shift cycle Primarv Timer Q I A Chossisl ON 0 M Pliar OFF I 2 The purpose of the 100 mmfd capacitor across the 56 megohm resistor in the grid circuit of the C18 tube shown in Figure 110 is to permit i...

Page 122: ...118 T Y P E 6 0 3 E L E C T R O N I C M U L T I P L I E R...

Page 123: ...negative pulses at its anode These negative pulses are fed to both sides of trigger B3 from the midpoint of the A33 load resistor The 10 pulse turns B3 ON which is initially OFF by cancelling The 14 p...

Page 124: ...120 T Y P E 6 0 3 E L E C T R O N I C M U L T I P L I E R ij w a N N 2 n o O D I I I I a m m m m...

Page 125: ...cycle but only on those Primary cycles following a carry over in the multiplier position determined by t b column shift control Conse quently it is evident that some means must be provided to signal...

Page 126: ...the anode potential of both Bl la and B111 is high from 0 5 through 10 1 and the grid of 3 5 switch is conditioned to conduct accordingly Ob serve that the grid of B5 is at approximately 50 volts as l...

Page 127: ...E L E C T R I C A L P R I N C I P L E S 123...

Page 128: ...ON entry pulses to the product counter start ar half Power tube B12 operares exactly as does B6 ex a cycle point after the multiplicand position being cept thar it inverts negative A pulses to positiv...

Page 129: ...ode is at Thus the column shift switches are permitted to conduct when L2 trigger goes ON It might be noted that on the main wiring diagram the TI megohm resistors are shown in the L chassis circuit w...

Page 130: ...T Y P E 6 0 3 E L E C T R O N I C MULTIPLIER...

Page 131: ...de potential rises abruptly from about 4 50 volts to 150 volts This positive pulse at 10 is passed to the L chassis to turn all the multiplicand read out triggers OFF Figure 118 is a block diagram sho...

Page 132: ...128 T Y P E 6 0 3 E L E C T R O N I C M U L T I P L I E R Figure 120 Schematic o f Column Shift Switches...

Page 133: ...si tion pick up and hold until the end of the adding cycle This permits all pulses between carry time and 10 to pass to the product counter in the position determined by the column shift If there is a...

Page 134: ...are shown at the right of the 0 chassis circuit No switch tubes connect to the 12th position of the products counter as this position is reserved ex clusively for carry overs It will be observed that...

Page 135: ...previously mentioned in connection I with the electronic timers the tertiary timer con trols the column shift Each time the secondary timer goes from 9 to 0 a negative pulse is passed to the tertiary...

Page 136: ......

Page 137: ...ft cycles ON OFF CODE 1st column shift M5 M2 M3 1 2nd column shift M3 M5 M2 2 3rd column shift M5 M3 M2 1 2 4th column shift M2 MS M3 4 5th column shift M5 M Z M3 1 4 6th column shift M3 M2 M5 2 4 The...

Page 138: ...of M42 are reproduced as 10 B pulses at the anode These 10 B pulses at 100 volrs am plitude from M42 are passed on to the suppressors of all the column shift switch tubes 0 chassis which are associate...

Page 139: ......

Page 140: ...ition goes from 9 to 0 yet it is necessary to add 1 to all positions except the units The first carry trigger will be the only one turned ON at carry time therefore at 10 5 a carry pulse passes to the...

Page 141: ...T is low from 1 0 5 through 14 Therefore B14 power tube is cut off from 1 0 5 through 14 and its anode potential is high from 1 0 5 through 14 Since the anode of B14 is connected to the top of a volta...

Page 142: ...I 50 volrs but connects to the input 14 by B8 Similarly the suppressors of all carry of a counter Actually the input of each product switches in the W and X chassis are tied together counter position...

Page 143: ...ry switches share the load resistor with the corresponding column shift switches This arrangement is necessary be cause ulses from both half entry switches and the column shift switches enter the clip...

Page 144: ...e first primary cycle of the 6th col umn shifi When A22 goes OFF at 5 it produces a negative pulse at the OFF side This negative pulse is passed ON to trigger A15 to turn it ON Once A15 goes ON it can...

Page 145: ...ers l n r I Product Counter 1Readout Trigger 1 eadoutInverters Reodout Power Tubes 8 28 Punch Mognol Pulses to turn Readout Tr pgarrOFF at Midindax counter Reading 3 Pbwer Tuba Pulses to Product Count...

Page 146: ...losed except when a rate card passes the die when group multiplying or when accumu lating products for punching in a subsequent card on a product summary run Trigger B29 is turned OFF at mid index poi...

Page 147: ...E L E C T R I C A L P R I N C I P L E S...

Page 148: ...it is turned OFF by B28 power tube as shown in Figure 129 Each time B29 goes OFF at mid index points a positive pulse passes to the B28 power tube which is normally cut off B28 momentarily conducts an...

Page 149: ...ne may be stopped at any point and the product in the counter compared with the amount punched in the card The pro ducts counter is read from bottom to top since the first counter position is at the t...

Page 150: ...ing in wrong the factor reversal switch may be set ON and the factors again read in If the trouble shifts to the other counter it is obvious that the trouble is in the punch unit Then by crossing cont...

Page 151: ...f rhe multiplier counter to advance failure of any positions of the multiplicand counter to roll failure of multiplicand read out triggers failure to column shift etc Once the trouble is localized to...

Page 152: ...the 1st column shift Now move the compute stop wire to post C37 and feed a new card This time the problem will be computed through the 2nd column shift Compute stop Trigger This may be repeated throu...

Page 153: ...and it is necessary to go through 8 column shifts for each computation This is of no consequence because nothing happens during the 7th and 8th column shifts except for advanc ing the timers This doe...

Page 154: ...d it is not necessary to have a meter with a sensitivity as high as 20 000 ohms per volt for ordinary trou ble shooting The anode potential of the 25L6 s varies from about 150 volts when non conductin...

Page 155: ...rt time it is necessary to keep the unit in a computing state to view the patterns on a scope screen The easiest method of doing this is to disconnect the wire on post M46 which is the input to the te...

Page 156: ...s to column shift switches Post B58 10 pulse to turn OFF multiplicand output triggers Post B45 14 pulse to turn OFF carry triggers Post B50 Carry control pulse Post B51 Input to multiplier counter Pos...

Page 157: ...ulsesto enter product counter only once Turned ON at 5 during the 1st primary cycle of the 6th column shift cycle from a negative pulse from A22 trigger turned OFF by cancelling A16 25L6 Power tube c...

Page 158: ...on by negative pulse from column shift control A32 12SN7 Compute start trigger under con trol of P24 cam contact in punch unit turned ON by P24 and cancelled OFF This trigger is necessary to permit th...

Page 159: ...hrough 14 The B16 control provides a half cycle delay to insure that carry can not occur until adding is complete B1G 12 S N 7 Trigger providing 10 pulse control ON from 0 5 through 10 5 of every addi...

Page 160: ...d in trigger for units position of multiplier counter turned ON when brush wired to this position makes con tact through the hole in the card and turned OFF by cancelling C2 6SK7 Multiplier read in sw...

Page 161: ...be controlling the OFF side of L2 trigger A positive pulse at 10 from B2 causes momentary conduction through L42 and the drop in the anode poten tial of L42 triggers L2 OFF thus stopping fur ther puls...

Page 162: ...on by M211 only during 1st column shift cycle Ml5 No t used spare 12SN7 MI61 12SN7 Conducts during 6th column shift cycle only when all interpolating blocking tubes are non conducting Cuts off power t...

Page 163: ...or first position of products counter 5 pulses from A24 during first primary cycle of last column shift cycle are passed to units position of product counter provided the units position is wired for h...

Page 164: ...en carrying W1 turns OFF at 14 of each adding cycle by ulse from B8 when reading out turned OFF by B28 at punch mid index point following carry W2 6SK7 Carry switch controlling carry from 1st to 2nd p...

Page 165: ...14 15 0 1 2 3 4 5 6 7 8 9 1 0 11 12 I 3 14 A PULSES 8 17 Follower LEGEND by cancel TR Trigger Indicates tube is conducting ON side in case of trigger SW Switch F Follower Indicates pulses produced but...

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