GB682221A - Electronic accumulator for use in calculating apparatus - Google Patents

Electronic accumulator for use in calculating apparatus

Info

Publication number
GB682221A
GB682221A GB3020050A GB3020050A GB682221A GB 682221 A GB682221 A GB 682221A GB 3020050 A GB3020050 A GB 3020050A GB 3020050 A GB3020050 A GB 3020050A GB 682221 A GB682221 A GB 682221A
Authority
GB
United Kingdom
Prior art keywords
trigger
hand
pulse
right
pulses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3020050A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NCR Corp
Original Assignee
NCR Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US58948645A priority Critical
Priority to US689922A priority patent/US2591107A/en
Priority to US133540A priority patent/US2591007A/en
Application filed by NCR Corp filed Critical NCR Corp
Priority to US21548351 priority patent/US2648835A/en
Priority to US215484A priority patent/US2697551A/en
Publication of GB682221A publication Critical patent/GB682221A/en
Application status is Expired legal-status Critical

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/48Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
    • G06F7/491Computations with decimal numbers radix 12 or 20.
    • G06F7/498Computations with decimal numbers radix 12 or 20. using counter-type accumulators
    • G06F7/4981Adding; Subtracting
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02Input arrangements using manually operated switches, e.g. using keyboards or dials
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K21/00Details of pulse counters or frequency dividers
    • H03K21/08Output circuits
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K3/00Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/78Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number

Abstract

682,221. Digital electric calculating-apparatus. NATIONAL CASH REGISTER CO. Dec. 11, 1950 [Dec. 17, 1949], No. 30200/50. Class 106 (i). Each denomination of an electronic accumulator comprises series-connected trigger pairs and a feed-back circuit, from a trigger pair later in the series to a trigger pair earlier in the series, including a rectifier of the semi-conductor type co-operating with an isolating impedance which assists the back impedance of the rectifier in preventing undesired operation of the later trigger pair by potential changes in the circuit of the earlier trigger pair. Each order of the accumulator, e.g. the units order shown, comprises four double-triodes A, B, C and D, each connected in a trigger circuit sensitive to negative pulses applied simultaneously to both grids. Positive input pulses are supplied over a lead 122 from an impulse generator, which may be as described in Specification 682,220, to one grid of a double-triode 220 and, in orders other than the units order, transfer pulses of similar form are applied to the other grid. Each of these pulses produces a negative pulse at the connected anodes of the double-triode 220 which are connected by a lead 277 and over condensers 275, 276 to the grids of the double-triode A. In the initial state, representing zero, only the trigger B is " on," which is represented by the left-hand triode being conducting. The first pulse applied to the trigger A, switches it " on." The second pulse switches the trigger A " off," producing a drop in the potential of the right-hand anode which is connected over condensers 305, 307 to the grids of the trigger B. The latter is thus switched " off " and, by a similar connection to the trigger C, switches it " on." The count proceeds in this fashion so that after the fifth pulse, the triggers A, B and C are " on." The sixth pulse switches the trigger A " off," which in turn switches the trigger B " off," which in its turn switches the trigger C " off." The trigger C is connected to the trigger D in the way that the other triggers are interconnected and consequently the trigger D is switched " on." The resulting conduction in the left-hand triode of the trigger D produces a drop in the potential at a point 314 between two parts 313, 315 of the anode resistance so that a negative pulse is passed over a condenser 355 and a rectifier 356 to the right-hand grid of the trigger C which is thus switched "on" again. The following pulses switch the triggers in the normal way so that, after the ninth pulse, all of the triggers are " on." The tenth pulse switches all of the triggers " off." When the trigger D is switched " off," a drop in potential occurs at a point 320 between two parts 319, 321 of its right-hand anode resistance and this produces a negative pulse, over condenser 345 which is passed by a rectifier 347 to the righthand grid of trigger B. In this way, trigger B is at once switched " on " again so that the order registers zero. The right-hand grid of each of the double-triodes B and C is connected to the left-hand grid over resistances 296, 304 and consequently, the triggers B and C are relatively sensitive to the feed-back pulses applied to their right-hand grids. These pulses may therefore be of low magnitude and may be supplied from the mid-points of the anode resistances of the trigger D. The parts 313, 319 of the anode resistances are thus in series with the rectifiers so that rectifiers of low back-impedance, such as germanium diodes, may be employed without danger of the triggers B and C influencing the trigger D. Transfer arrangements. A transfer pulse produced by the switching " off " of the trigger D is stored by a double-triode trigger pair 375, normally conducting in its right-hand section. The negative pulse produced at the right-hand anode of the trigger D when the order passes from a registration of " 9 " to one of " 0," switches the trigger 375. The impulse generator for use with the accumulator is arranged to emit negative pulses on a line 395, connected to the left-hand grid of the trigger 375, at times between the normal entry pulses, and the negative pulse immediately following the switching of the trigger 375 restores this trigger. The consequent rise in the potential of the left-hand anode produces a positive pulse across a condenser (not shown) connected thereto by a lead 372, which pulse is applied to the right-hand grid of the input tube 220 of the next higher order to add " one " therein. Zeroizing. The accumulator may be re-set by momentarily opening a switch, e.g. 267, in each order to remove the negative bias from the right-hand grids of the triggers A, C and D and the transfer trigger 375 and from the left-hand grid of the trigger B. Output arrangements. Indicating-means E, described in Specification 682,229, may be associated with the accumulator.
GB3020050A 1945-04-19 1950-12-11 Electronic accumulator for use in calculating apparatus Expired GB682221A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US58948645A true 1945-04-19 1945-04-19
US689922A US2591107A (en) 1945-04-19 1946-08-12 Method of making a thyroprotein feed
US133540A US2591007A (en) 1949-12-17 1949-12-17 Electronic accounting machine
US21548351 US2648835A (en) 1945-04-19 1951-03-14 Electronic impulse generator
US215484A US2697551A (en) 1945-04-19 1951-03-14 Data indicating means

Publications (1)

Publication Number Publication Date
GB682221A true GB682221A (en) 1952-11-05

Family

ID=32303809

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3020050A Expired GB682221A (en) 1945-04-19 1950-12-11 Electronic accumulator for use in calculating apparatus
GB3019950A Expired GB682220A (en) 1945-04-19 1950-12-11 Electrical impulse generator

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB3019950A Expired GB682220A (en) 1945-04-19 1950-12-11 Electrical impulse generator

Country Status (5)

Country Link
US (1) US2648835A (en)
DE (1) DE936066C (en)
FR (2) FR1030724A (en)
GB (2) GB682221A (en)
NL (2) NL96168C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2858072A (en) * 1951-07-13 1958-10-28 Ibm Record-controlled electronic calculating machine
US2765403A (en) * 1952-08-18 1956-10-02 Socony Mobil Oil Co Inc Conduction transfer production of control voltage functions
US2884189A (en) * 1953-08-31 1959-04-28 Ibm Read-in circuit
NL194400A (en) * 1954-02-08
US3268870A (en) * 1962-06-27 1966-08-23 Control Data Corp System and apparatus for automatic data collection

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB357532A (en) * 1930-06-12 1931-09-14 Standard Telephones Cables Ltd Electric circuits employing thermionic valves or the like
US2308778A (en) * 1939-09-11 1943-01-19 Jr Leon M Prince Automatic telephone system
BE469769A (en) * 1941-05-23 1900-01-01
US2405664A (en) * 1941-07-17 1946-08-13 Ncr Co Electronic accumulator
US2404697A (en) * 1942-03-21 1946-07-23 Ncr Co Calculating device
US2451812A (en) * 1942-09-16 1948-10-19 Ncr Co Electron tube variable impulse transmitter
US2398771A (en) * 1943-05-24 1946-04-23 Ncr Co Electronic device
GB601122A (en) * 1943-12-27 1948-04-28 Nat Cash Rrgister Company Improvements in or relating to calculating apparatus
US2575331A (en) * 1945-10-18 1951-11-20 Ncr Co Electronic multiplying device

Also Published As

Publication number Publication date
DE936066C (en) 1955-12-01
NL96168C (en)
US2648835A (en) 1953-08-11
GB682220A (en) 1952-11-05
FR1030725A (en) 1953-06-16
NL157969B (en)
FR1030724A (en) 1953-06-16

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