GB786520A - Electro-static methods of storing and recovering information - Google Patents

Electro-static methods of storing and recovering information

Info

Publication number
GB786520A
GB786520A GB10058/55A GB1005855A GB786520A GB 786520 A GB786520 A GB 786520A GB 10058/55 A GB10058/55 A GB 10058/55A GB 1005855 A GB1005855 A GB 1005855A GB 786520 A GB786520 A GB 786520A
Authority
GB
United Kingdom
Prior art keywords
spot
potential
intensity
point
sharply
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
GB10058/55A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB786520A publication Critical patent/GB786520A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
    • 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
    • G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
    • G11C11/23—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using electrostatic storage on a common layer, e.g. Forrester-Haeff tubes or William tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/58—Tubes for storage of image or information pattern or for conversion of definition of television or like images, i.e. having electrical input and electrical output
    • H01J31/60—Tubes for storage of image or information pattern or for conversion of definition of television or like images, i.e. having electrical input and electrical output having means for deflecting, either selectively or sequentially, an electron ray on to separate surface elements of the screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Measurement Of Radiation (AREA)

Abstract

786,520. Electric digital-data-storage apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. April 6, 1955 [April 9, 1954], No. 10058/55. Class 106 (1). [Also in Group XL (a)] In a method of statically storing binary digital data, a spot on a dielectric target in capacitative relation to a signal plate is bombarded with a sharply established and sharply terminated electron beam, the beam being either of a first predetermined intensity whereby a static charge representative of one type of binary bit is deposited on said spot, or of a second predetermined differing intensity whereby a static charge representative of the other type of binary bit is deposited on said spot. If the velocity of a primary electron beam 26, Fig. 1, is made sufficiently high to cause the secondary emission of a greater number of electrons when it strikes a spot on a phosphor target 14 (i.e. if the secondary electron emission coefficient is greater than unity), then the electrostatic potential of the spot depends upon the primary beam intensity in the manner shown in Fig. 3. With a low beam intensity the potential of the spot is positive, point Az, Fig. 3, and with a high beam intensity the potential is negative point - B 1 . If the beam intensity corresponds to the point - B 1 and is then decreased to zero the potential of the spot will increase along the curve providing the decrease is not too rapid, and the spot will be left with a positive potential +A. With a very rapid decrease in beam intensity, however, the potential of the spot follows one of the dotted curves, and the spot is left with a negative potential - B. This phenomenon is used to store binary bits. To store a " 1 " a high intensity beam corresponding to the point - B 1 is initiated, and is sharply cut-off leaving the spot with a negative potential and to store a " 0 " a low intensity beam, corresponding to the point Az, is initiated and is sharply cut-off leaving the spot with a positive potential. Thus data storage is effected by applying large pulses to the control grid for ones and small pulses for zeros. Stored data is read by applying a burst of the low intensity beam to each spot in turn thereby bringing it to point Az, Fig. 3, and strobing the leading edge of the pulse induced in the signal plate. For non-destructive readout a recirculatory technique is used; when a zero is read the state of the spot is unchanged, left-hand side, Fig. 4, and when a one is read the electron beam density is increased to the high level for the second half of the reading period, the increase of the control grid potential being shown dotted in Fig. 4.
GB10058/55A 1954-04-09 1955-04-06 Electro-static methods of storing and recovering information Expired GB786520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US422056A US2835845A (en) 1954-04-09 1954-04-09 Electro-static methods of storing and recovering information

Publications (1)

Publication Number Publication Date
GB786520A true GB786520A (en) 1957-11-20

Family

ID=23673205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10058/55A Expired GB786520A (en) 1954-04-09 1955-04-06 Electro-static methods of storing and recovering information

Country Status (5)

Country Link
US (1) US2835845A (en)
DE (1) DE1015483B (en)
FR (1) FR1141385A (en)
GB (1) GB786520A (en)
IT (1) IT532932A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL290399A (en) * 1962-03-19

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR820870A (en) * 1936-04-20 1937-11-20 Fernseh Ag Cathode ray switch
US2675499A (en) * 1948-07-10 1954-04-13 Bell Telephone Labor Inc Cathode-ray device
BE491594A (en) * 1948-10-13
NL85244C (en) * 1950-01-19

Also Published As

Publication number Publication date
US2835845A (en) 1958-05-20
FR1141385A (en) 1957-09-02
IT532932A (en)
DE1015483B (en) 1957-09-12

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