GB873892A - Improvements in or relating to electrical apparatus employing cathode ray tubes for the visual display of digits, letters or other symbols - Google Patents

Improvements in or relating to electrical apparatus employing cathode ray tubes for the visual display of digits, letters or other symbols

Info

Publication number
GB873892A
GB873892A GB1339859A GB1339859A GB873892A GB 873892 A GB873892 A GB 873892A GB 1339859 A GB1339859 A GB 1339859A GB 1339859 A GB1339859 A GB 1339859A GB 873892 A GB873892 A GB 873892A
Authority
GB
United Kingdom
Prior art keywords
symbols
pulses
sawtooth
frame
transistor
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
GB1339859A
Inventor
Frank Edgar Ralph
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1339859A priority Critical patent/GB873892A/en
Publication of GB873892A publication Critical patent/GB873892A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/06—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows
    • G09G1/14—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam tracing a pattern independent of the information to be displayed, this latter determining the parts of the pattern rendered respectively visible and invisible

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Details Of Television Scanning (AREA)

Abstract

873,892. Cathode-ray oscilloscopes; transistor sawtooth generating circuits. GENERAL ELECTRIC CO. Ltd. April 20, 1960 [April 20, 1959], No. 13398/59. Classes 40(6) and 40(7) Relates to the display of symbols on a cathode-ray tube (C.R.T.) screen by the coded intensity-modulation of a rectangular raster. According to the invention synchronism between the symbol pulse trains and line and frame timebases is assured by generating the pulse trains and timebase initiating pulses from coupled rotating members. In the embodiment described motor-driven shaft 32 carries discs 2 . . . 9 coded for synchronizing a seven-line raster and pulse trains for numerals nought to nine, pulses being generated electro-magnetically by series coils 35, 36 on the pole-pieces of permanent magnet 34. Several C.R.T.s 16 . . . are provided each being associated with a manual symbol selector 19 . . . . The pulses may alternatively be generated by motor-driven ganged switch banks. One pulse train may be a combination of two or more symbols. Transistor sawtooth generating circuits, Fig. 4. Each generator 10, 11 comprises a similar circuit. Frame sawtooth generator 10 includes terminals 54, 55 across which the frame synchronizing pulse is applied thus causing transistor 70 to conduct and discharge capacitor 64 which thereafter charges through resistor 62 and inductor 66. The linear sawtooth voltage across the inductor is amplified and applied to the C.R.T. Y-plates via transformer 76.
GB1339859A 1959-04-20 1959-04-20 Improvements in or relating to electrical apparatus employing cathode ray tubes for the visual display of digits, letters or other symbols Expired GB873892A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1339859A GB873892A (en) 1959-04-20 1959-04-20 Improvements in or relating to electrical apparatus employing cathode ray tubes for the visual display of digits, letters or other symbols

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1339859A GB873892A (en) 1959-04-20 1959-04-20 Improvements in or relating to electrical apparatus employing cathode ray tubes for the visual display of digits, letters or other symbols

Publications (1)

Publication Number Publication Date
GB873892A true GB873892A (en) 1961-08-02

Family

ID=10022241

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1339859A Expired GB873892A (en) 1959-04-20 1959-04-20 Improvements in or relating to electrical apparatus employing cathode ray tubes for the visual display of digits, letters or other symbols

Country Status (1)

Country Link
GB (1) GB873892A (en)

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