US2956194A - Electron tube for the optical indication of an electrical magnitude - Google Patents

Electron tube for the optical indication of an electrical magnitude Download PDF

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Publication number
US2956194A
US2956194A US765194A US76519458A US2956194A US 2956194 A US2956194 A US 2956194A US 765194 A US765194 A US 765194A US 76519458 A US76519458 A US 76519458A US 2956194 A US2956194 A US 2956194A
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US
United States
Prior art keywords
cathode
anode
electrical magnitude
electron tube
optical indication
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 - Lifetime
Application number
US765194A
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English (en)
Inventor
Alma Gerrit Hendrik Petrus
Keeman Willem
Klopping Carel Peter
Kranen Dirk Cornelis
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips 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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2956194A publication Critical patent/US2956194A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J31/14—Magic-eye or analogous tuning indicators

Definitions

  • the invention relates to electron tubes for the optical indication of the occurrence of an electrical magnitude such as a load, current or voltage, more particularly on a tube which may be operated at voltages lower than 100 volts and which is suitable for use in computers and counters and the like, possibly in co-operation withtransistors.
  • the anode comprises a grid, the wires of which are covered with luminescent material at least for part of the surface remote from the cathode.
  • the grid which serves as an anode is preferably arranged wholly at one side of the cathode, it -being possible for a reector electrode to be arranged at the opposite side of the cathode. termined embodiment, the wires of the anode are located in one plane.
  • the pitch of the wires is preferably chosen to be comparatively high with respect to that of the control grid.
  • the wires are required to be spaced to an extent such that electrons in suicient quantity can pass between them and, on the other hand, it is desirable for lthem to be spaced so closely that, as seen from some distance, the luminous parts of the wires seem to produce a luminous column along the longitudinal axis of the tube.
  • reference numeral 1 indicates the bulb of a high-vacuum tube containing a lamentary cathode 2, which is surrounded by a control grid 3.
  • a reflector elec- In one detrode 4 is arranged at one side of the cathode 2, an anode 5 arranged at the opposite side of cathode 2 comprising an elliptic grid of high pitch, of which at least the parts of the wires most adjacent the cathode are covered, on the side opposite the cathode, with luminescent material 6, such as willemite.
  • luminescent material is sprayed onto the whole grid.
  • Luminescent points are then produced on the various wires, which provides a clear indication. If the control grid 3 becomes sutilciently negative, the luminous points disappear.
  • the tube may thus provide an indication as to whether, for example, a circuit connected to the control electrode 3 conveys current or a given point has a positive or negative potential with respect to the cathode 2.
  • the electrode 4 is connected to a low potential, for example to the negative terminal of cathode 2.
  • the anode has the shape of a half-grid 7, which may be obtained by pressing the wires of a wound grid into one plane.
  • the anode is constituted by a at grid 8.
  • Fig. 4 is a View of a tube as shown in Figures 1, 2 or 3, in which in the event of the tube conveying anode current, a series of small luminous lines 9 may be seen, produced by the luminous parts of the wires of the anode.
  • An electron discharge tube for the optical indication of an electrical magnitude adapted to operate at voltages lower than volts comprising a cathode having a given axis, a control electrode, a rellector electrode 1ocated on one side of the cathode, and an anode comprising an elliptical grid located wholly on the other side

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Electrolytic Production Of Metals (AREA)
US765194A 1957-10-04 1958-10-03 Electron tube for the optical indication of an electrical magnitude Expired - Lifetime US2956194A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL221345 1957-10-04

Publications (1)

Publication Number Publication Date
US2956194A true US2956194A (en) 1960-10-11

Family

ID=19750998

Family Applications (1)

Application Number Title Priority Date Filing Date
US765194A Expired - Lifetime US2956194A (en) 1957-10-04 1958-10-03 Electron tube for the optical indication of an electrical magnitude

Country Status (6)

Country Link
US (1) US2956194A (enrdf_load_stackoverflow)
CH (1) CH362759A (enrdf_load_stackoverflow)
DE (1) DE1820410U (enrdf_load_stackoverflow)
FR (1) FR1204039A (enrdf_load_stackoverflow)
GB (1) GB889832A (enrdf_load_stackoverflow)
NL (1) NL99123C (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206404A (en) * 1976-10-14 1980-06-03 Wagner Electric Corporation Vacuum fluorescent indicator
US4301389A (en) * 1979-12-12 1981-11-17 International Business Machines Corp. Multiple beam cathode ray tube with apertured cathode and control grid
US4692663A (en) * 1985-07-08 1987-09-08 Ise Electronics Corporation Fluorescent display tube for light source
CN103888732A (zh) * 2014-03-25 2014-06-25 中国矿业大学(北京) 一种基于矿灯的单工通信与识别方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1994733A (en) * 1934-07-25 1935-03-19 Rca Corp Tuning indicator tube
US2243408A (en) * 1938-05-12 1941-05-27 Rca Corp Visual tuning indicator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1994733A (en) * 1934-07-25 1935-03-19 Rca Corp Tuning indicator tube
US2243408A (en) * 1938-05-12 1941-05-27 Rca Corp Visual tuning indicator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206404A (en) * 1976-10-14 1980-06-03 Wagner Electric Corporation Vacuum fluorescent indicator
US4301389A (en) * 1979-12-12 1981-11-17 International Business Machines Corp. Multiple beam cathode ray tube with apertured cathode and control grid
US4692663A (en) * 1985-07-08 1987-09-08 Ise Electronics Corporation Fluorescent display tube for light source
CN103888732A (zh) * 2014-03-25 2014-06-25 中国矿业大学(北京) 一种基于矿灯的单工通信与识别方法
CN103888732B (zh) * 2014-03-25 2017-11-10 中国矿业大学(北京) 一种基于矿灯的单工通信与识别方法

Also Published As

Publication number Publication date
CH362759A (de) 1962-06-30
NL99123C (enrdf_load_stackoverflow)
DE1820410U (de) 1960-10-27
GB889832A (en) 1962-02-21
FR1204039A (fr) 1960-01-22

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