GB1385973A - Symbol display tube having an auxiliary electrode - Google Patents

Symbol display tube having an auxiliary electrode

Info

Publication number
GB1385973A
GB1385973A GB1778472A GB1778472A GB1385973A GB 1385973 A GB1385973 A GB 1385973A GB 1778472 A GB1778472 A GB 1778472A GB 1778472 A GB1778472 A GB 1778472A GB 1385973 A GB1385973 A GB 1385973A
Authority
GB
United Kingdom
Prior art keywords
anode
auxiliary electrode
filaments
elements
display
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
GB1778472A
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.)
Wagner Electric Corp
Original Assignee
Wagner Electric 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 Wagner Electric Corp filed Critical Wagner Electric Corp
Publication of GB1385973A publication Critical patent/GB1385973A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/15—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen with ray or beam selectively directed to luminescent anode segments

Abstract

1385973 Display tubes WAGNER ELECTRIC CORP 18 April 1972 [25 Aug 1971] 17784/72 Addition to 1249935 Heading H1D The display tube of the Specification 1,249,935 is modified by providing an auxiliary electrode 17 insulated from and optically non-interfering with the anode display elements 16 and providing the filamentary cathode 18 in the form of at least first and second filaments or filament segments 18A and 18B spaced apart in a plane substantially parallel to the plane in which the said anode display elements are disposed. The anode elements 16A-16G and an optional decimal point 16H are conductive layers deposited on the inner surface of a dished support member 14 and covered with phosphor coatings. The auxiliary electrode 17 is deposited on the same surface surrounding but spaced from the anode elements, and controls the flow of electrons from the cathode which comprises two filaments 18A and 18B connected between pins 24 and 26 and the ends of a spring 23 attached to a pin 22. The filaments can be energized in series or in parallel. The auxiliary electrode may not be co-planar with the anode display elements, and the filamentary cathode may alternatively be arranged in a V or N- shaped array. The support member 14 is provided with an exhaust tube 30. A circuit for pulsing three tubes is described (Fig. 2, not shown).
GB1778472A 1971-08-25 1972-04-18 Symbol display tube having an auxiliary electrode Expired GB1385973A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17466671A 1971-08-25 1971-08-25

Publications (1)

Publication Number Publication Date
GB1385973A true GB1385973A (en) 1975-03-05

Family

ID=22637041

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1778472A Expired GB1385973A (en) 1971-08-25 1972-04-18 Symbol display tube having an auxiliary electrode

Country Status (7)

Country Link
US (1) US3780326A (en)
JP (1) JPS4831051A (en)
CA (1) CA999633A (en)
DE (1) DE2218234A1 (en)
FR (1) FR2150295B2 (en)
GB (1) GB1385973A (en)
IT (1) IT952496B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS551391Y2 (en) * 1974-05-20 1980-01-16
US4004186A (en) * 1975-12-01 1977-01-18 Texas Instruments Incorporated Vacuum fluorescent display having a grid plate coplanar with the anode
JPS5272160A (en) * 1975-12-12 1977-06-16 Dainippon Printing Co Ltd Multiidigit fluorescent display unit
US4156239A (en) * 1976-07-16 1979-05-22 Canon Kabushiki Kaisha Display device
JPS5416173A (en) * 1977-07-07 1979-02-06 Futaba Denshi Kogyo Kk Fluorescent display tube
US4578615A (en) * 1984-05-01 1986-03-25 Xerox Corporation Vacuum fluorescent printing device employing a fly's-eye light coupling method
DE3583180D1 (en) * 1984-05-01 1991-07-18 Xerox Corp LIGHT BAR.
JPH03132788A (en) * 1989-10-19 1991-06-06 Kiyoshi Nagai Light emission display device and stem for light emission display device
JPH04149934A (en) * 1990-10-11 1992-05-22 Matsushita Electric Ind Co Ltd Image display device
JP2002093350A (en) * 2000-09-18 2002-03-29 Futaba Corp Display tube using filament

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US317633A (en) * 1885-05-12 edison
NL6508596A (en) * 1965-07-03 1967-01-04
DE2016737A1 (en) * 1969-04-17 1970-11-05 Sony Corp., Tokio Electron tube
US3584252A (en) * 1969-05-23 1971-06-08 Wagner Electric Corp Electrically-shielded symbol-display tube
US3619694A (en) * 1969-11-18 1971-11-09 Ise Electronics Corp Character-indicating electron tube with fluorescent display structure

Also Published As

Publication number Publication date
DE2218234A1 (en) 1973-03-08
IT952496B (en) 1973-07-20
FR2150295B2 (en) 1976-01-16
FR2150295A2 (en) 1973-04-06
CA999633A (en) 1976-11-09
JPS4831051A (en) 1973-04-24
US3780326A (en) 1973-12-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees