GB788352A - Improvements in and relating to electric signal storage devices and apparatus - Google Patents
Improvements in and relating to electric signal storage devices and apparatusInfo
- Publication number
- GB788352A GB788352A GB21746/54A GB2174654A GB788352A GB 788352 A GB788352 A GB 788352A GB 21746/54 A GB21746/54 A GB 21746/54A GB 2174654 A GB2174654 A GB 2174654A GB 788352 A GB788352 A GB 788352A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cores
- group
- conductor
- voltage
- core
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/06—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element
- G11C11/06085—Multi-aperture structures or multi-magnetic closed circuits, each aperture storing a "bit", realised by rods, plates, grids, waffle-irons,(i.e. grooved plates) or similar devices
Abstract
788,352. Electric digital-data-storage apparatus. PLESSEY CO., Ltd. July 11, 1955 [July 26, 1954], No. 21746/54. Class 106 (1). [Also in Groups XXXV and XXXIX] When current in a single conductor is passed through the aperture of a toroidal core formed of material having a substantially rectangular hysteresis loop to reverse the state of remanent magnetization, the value of current required depends on the aperture diameter. This principle is applied to storage of digital information in a group of ferrite toroids which have graded apertures, each of a different diameter, threaded by a common conductor to which a saw-toothed waveform is applied. As the current increases the initial magnetizations of the graded cores are reversed in turn, the number of cores affected being determined by the maximum value of the current. The group of cores may be constituted by holes 11, Fig. 2, of different diameters in a ferrite sheet 10, magnetic isolation between cores being effected by equally-spaced perforations around each hole as described in Specification 788,351, [Group XXXV]. Two silver printed conductors 12, 13, one an input winding and the other an output winding, pass through all the holes 11. Alternatively the group of cores may be formed from a series of ferrite sheets having holes of different diameters, the sheets being assembled as a stack with interleaved sheets of non-magnetic material and with the holes in alignment to permit the use of straight input and output conductors. A storage system for digits represented by pulse trains is shown in Fig. 3, each digit being registered on a separate group of graded cores 14 selected by a switch 17. A train of pulses is first applied over an amplifier and decimal counting tube circuit 19 to a dekatron 20, and causes the discharge between the anode and zero cathode 20a to be transferred to the cathode corresponding to the digital value of the pulses received. When a " read-in " sawtoothed voltage 21 reaches a zero value, a timing unit (not shown) opens a, gate 22 and the " readin " voltage is applied over a drive unit 23 to a common input conductor 15 of a core group 14. As all the cores are initially magnetized in the same sense, the "read-in" voltage causes reversal of magnetism to occur in turn. On each flux reversal of a core, a pulse is established in a common " read-out " conductor 16 which acts over circuit 19 to move the discharge in the dekatron 20 back towards the zero cathode. When this stage is reached, the number of core flux reversals equals the number of pulses received at terminal 18, and the voltage developed across resistor 25 closes gate 22. To read out the stored information, the core group is connected by a switch 24 to an output terminal 26 and a gate 27 is opened. A sawtoothed voltage 28 of opposite polarity 21 is applied to conductor 15, and those cores having reversed fluxes are restored in turn to their initial condition. As a result, a train of induced pulses equal in number to the stored digit is produced at terminal 26.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB21746/54A GB788352A (en) | 1954-07-26 | 1954-07-26 | Improvements in and relating to electric signal storage devices and apparatus |
US523343A US2870433A (en) | 1954-07-26 | 1955-07-20 | Storage devices |
DEP14787A DE1036922B (en) | 1954-07-26 | 1955-09-07 | Magnetic storage device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB21746/54A GB788352A (en) | 1954-07-26 | 1954-07-26 | Improvements in and relating to electric signal storage devices and apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB788352A true GB788352A (en) | 1958-01-02 |
Family
ID=10168096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21746/54A Expired GB788352A (en) | 1954-07-26 | 1954-07-26 | Improvements in and relating to electric signal storage devices and apparatus |
Country Status (3)
Country | Link |
---|---|
US (1) | US2870433A (en) |
DE (1) | DE1036922B (en) |
GB (1) | GB788352A (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3110886A (en) * | 1954-09-13 | 1963-11-12 | Rca Corp | Magnetic storage device |
US2970296A (en) * | 1955-05-10 | 1961-01-31 | Ibm | Printed circuit ferrite core memory assembly |
US2992415A (en) * | 1956-10-04 | 1961-07-11 | Ibm | Magnetic core pulse circuits |
US3045228A (en) * | 1956-12-10 | 1962-07-17 | Ibm | Magnetic core storage device |
US3315237A (en) * | 1957-03-18 | 1967-04-18 | Gulton Ind Inc | Ferrite memory cells and matrices |
NL231142A (en) * | 1957-10-23 | |||
US3241128A (en) * | 1958-02-12 | 1966-03-15 | Rca Corp | Magnetic systems |
US3235851A (en) * | 1958-03-03 | 1966-02-15 | Burroughs Corp | Core memory device |
US3052873A (en) * | 1958-09-18 | 1962-09-04 | Bell Telephone Labor Inc | Magnetic memory circuits |
NL252176A (en) * | 1958-09-22 | |||
US3111661A (en) * | 1958-10-29 | 1963-11-19 | Gen Dynamics Corp | Analog-to-digital converter |
US3140402A (en) * | 1960-01-19 | 1964-07-07 | Amp Inc | Magnetic-core logic circuits |
US3108194A (en) * | 1960-03-11 | 1963-10-22 | Gen Motors Corp | Quantizer |
DE1137079B (en) * | 1960-09-30 | 1962-09-27 | Siemens Ag | Circuit arrangement for converting binary-coded message characters from a first code into a second code |
DE1187269B (en) * | 1962-08-11 | 1965-02-18 | Erich Sinemus Dipl Ing | Pulse counter arrangement with a counter core made of a material with rectangular hysteresis behavior |
BE636625A (en) * | 1962-08-28 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2452529A (en) * | 1941-10-24 | 1948-10-26 | Hartford Nat Bank & Trust Co | Magnet core |
US2792563A (en) * | 1954-02-01 | 1957-05-14 | Rca Corp | Magnetic system |
-
1954
- 1954-07-26 GB GB21746/54A patent/GB788352A/en not_active Expired
-
1955
- 1955-07-20 US US523343A patent/US2870433A/en not_active Expired - Lifetime
- 1955-09-07 DE DEP14787A patent/DE1036922B/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE1036922B (en) | 1958-08-21 |
US2870433A (en) | 1959-01-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB788352A (en) | Improvements in and relating to electric signal storage devices and apparatus | |
US2781503A (en) | Magnetic memory circuits employing biased magnetic binary cores | |
US2808578A (en) | Memory systems | |
US2805409A (en) | Magnetic core devices | |
GB753025A (en) | Magnetic switching devices | |
GB784541A (en) | Improvements in or relating to magnetic switching circuits | |
US3027547A (en) | Magnetic core circuits | |
GB744115A (en) | Magnetic switching devices | |
GB730165A (en) | Improvements in or relating to magnetic storage devices | |
GB766037A (en) | Improvements in or relating to devices comprising a closed circuit of ferromagnetic material having high retentivity | |
GB908268A (en) | Electromechanical signal translating devices | |
US2851677A (en) | Indicator for storage devices | |
US2967294A (en) | Saturable reactor system for information storage, comparison and readout | |
GB939374A (en) | Improvements in or relating to data storage devices | |
US2886790A (en) | Saturable reactance flip-flop device | |
US3521249A (en) | Magnetic memory arrangement having improved storage and readout capability | |
US3075084A (en) | Magnetic core counting circuit | |
US3093819A (en) | Magnetic translators | |
US2889541A (en) | Saturable reactor circuit | |
US3215991A (en) | Information storage apparatus | |
US2874372A (en) | Magnetic core devices | |
US3125744A (en) | Stage | |
US3188612A (en) | Sequential arrangement | |
US3944956A (en) | Magnetically controlled switching matrix | |
GB916234A (en) | Electric circuits comprising memory elements |