US2749465A - Visual indicating device for electric voltages - Google Patents

Visual indicating device for electric voltages Download PDF

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Publication number
US2749465A
US2749465A US209146A US20914651A US2749465A US 2749465 A US2749465 A US 2749465A US 209146 A US209146 A US 209146A US 20914651 A US20914651 A US 20914651A US 2749465 A US2749465 A US 2749465A
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United States
Prior art keywords
cathode
deflecting
counterelectrodes
electrode
plane
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Expired - Lifetime
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US209146A
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Friedrich K Malsch
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International Standard Electric Corp
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International Standard Electric Corp
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/86—Hydrazides; Thio or imino analogues thereof
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/12—Electrically-operated arrangements for indicating correct tuning
    • H03J3/14—Visual indication, e.g. magic eye

Definitions

  • the known visual indicating devices for electric voltages make use of an arrangement which consists of a cathode, one or more electrode plates and a somewhat cup-like fluorescent screen which concentrically surrounds the cathode.
  • the deflection plate or plates consist of barlike rods arranged parallel to the cathode. With deflecting rods of this type a maximum shadow sector of approximately 100" is achieved if the deflecting rod is brought to cathode potential. This angle of 100 is, in many cases, insufficient for accurate tuning.
  • these counterelectrodes under strong positive potential, usually fluorescent screen potential, consist of plates which lie on a plane thru the cathode axis approximately vertical to that plane which can be erected thru the cathode axis and the deflecting electrode.
  • the counterelectrodes can also lie in planes which do not pass thru the cathode axis, but which somehow incline thereto in such a manner that they pass thru the plane thru the deflecting electrode and the oathode axis at an angle.
  • the counterelectrode plates can also be partially or completely arched towards the cathode or control electrode.
  • Fig. 2 is a view similar to Fig. l of a modified embodiment of the present invention.
  • Fig. 3 is a view taken along the line 33 of Fig. 2;
  • Fig. 4 is a side view of the tube of Figs. 2 and 3 partially broken away to disclose in perspective the arrangement of the electrodes.
  • counterelectrodes 1 are arranged in such a manner that they run vertically to the deflecting plane. These counterelectrode plates are put under high positive potential, preferably fluorescent screen potential. The counterelectrodes are in close proximity to the cathode 2, so that a strong field between cathode 2 and these counterelectrodes 1 is set up.
  • a grid, under cathode potential or thereabout, can also be arranged in a known manner between the cathode and the other electrodes.
  • the counterelectrodes 1 are not placed in a vertical plane to the plane thru the cathode 2 and the control electrode, but inclined towards this plane. This makes the deflecting field between the cathode and counterelectrode still more efifective. Arrangements of this type permit maximum shadow angles 7 of approximately This arrangement is of particular importance for visual indicating devices for electric voltages in which the ray generating system is arranged near the periphery of the tubes. The shadow angle then practically covers the whole fluorescent screen if the deflecting electrode is put under cathode potential. In visual indicating devices of the type described above-with very large maximum shadow anglesthe edges of the luminous sectors are not straight lined without further ado, due to the extensive deflecting fields.
  • a straight line defining of the sectors is desired, in order to make precise reading possible, especially if a scale or like marking is to be put on the fluorescent screen.
  • a straight line defining of the luminous sectors can be achieved by arching the pin like deflecting electrode 10 so that a straight line defining of the luminous sectors will result.
  • Fig. 3 shows a section of Fig. 2 along line 33.
  • the deflecting rod 10 is arched. It has an oval, prismatic or elliptical cross section. The purpose of this is to reduce the control electrode current.
  • An indicator tube comprising an elongated cathode, a fluorescent screen at least partially surrounding said cathode and adapted to be illuminated by electron bombardment therefrom, an electron deflection electrode mounted on one side of said cathode intermediate the cathode and the screen, a pair of elongated counterelectrodes extending parallel to said cathode adjacent thereto, said counterelectrodes and cathode lying in a plane substantially normal to the plane through said deflection electrode and cathode, said counterelectrodes being plates whose width extends at an angle to the plane through said counterelectrodes and cathode.
  • An indicator tube comprising an elongated cathode, a fluorescent screen at least partially surrounding said cathode and adapted to be illuminated by electron bombardment therefrom, an electron deflection electrode mounted on one side of said cathode intermediate the cathode and the screen, a pair of elongated counterelectrodes extending parallel to said cathode adjacent thereto, said counterelectrodes and cathode lying in a plane substantially normal to the plane through said deflection electrode and cathode, said counterelectrodes, said cath- 4 ode and deflection electrode all being mounted towards the periphery of said fluorescent screen on the same side of the center of said screen.

Landscapes

  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Measurement Of Radiation (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Details Of Television Scanning (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Radiation-Therapy Devices (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Description

F. K. MALSCH 2,749,465
VISUAL. INDICATING DEVICE FOR ELECTRIC VOLTAGES June 5, 1956 Filed Feb. 2, 1951 TOR IN FR/EDR/CH K.
LSCH
BY ZV pg ATTORNEY United Sttes Patent VISUAL INDICATING DEVICE FOR ELECTRIC VOLTAGES Friedrich K. Malsch, Esslingen-Waldenbronn, Germany, assignor to International Standard Electric Corporation, New York, N. Y., a corporation of Delaware Application February 2, 1951, Serial No. 209,146
Claims priority, application Germany February 28, 1950 3 Claims. (Cl. 313-1075) The known visual indicating devices for electric voltages, especially those used as tuning indicators in radios, make use of an arrangement which consists of a cathode, one or more electrode plates and a somewhat cup-like fluorescent screen which concentrically surrounds the cathode. The deflection plate or plates consist of barlike rods arranged parallel to the cathode. With deflecting rods of this type a maximum shadow sector of approximately 100" is achieved if the deflecting rod is brought to cathode potential. This angle of 100 is, in many cases, insufficient for accurate tuning. Attempts have been made to enlarge the angle by using a deflecting plate instead of a deflecting rod, the plane of which passes thru the cathode axis and the edge of which faces the cathode axis. But the deflection sensitivity achieved with deflecting plates of this type is not much greater than that achieved by the use of deflecting rods. Neither do the electric transverse fields which form between the con trol electrode and the rods generally supporting the screening cap result in a substantial enlargement of the shadow angle. According to the invention counterelectrodes are added to the deflecting organ which are formed and arranged in such a manner that strong and extensive deflecting fields are generated between the potentially variable deflecting electrodes and the counterelectrodes mentioned. For instance, these counterelectrodes, under strong positive potential, usually fluorescent screen potential, consist of plates which lie on a plane thru the cathode axis approximately vertical to that plane which can be erected thru the cathode axis and the deflecting electrode. However the counterelectrodes can also lie in planes which do not pass thru the cathode axis, but which somehow incline thereto in such a manner that they pass thru the plane thru the deflecting electrode and the oathode axis at an angle. The counterelectrode plates can also be partially or completely arched towards the cathode or control electrode. The following examples explain the invention in more detail, reference being had to the drawings in which Fig. 1 is a schematic plan view of a tuning indicator tube according to the present invention;
Fig. 2 is a view similar to Fig. l of a modified embodiment of the present invention;
Fig. 3 is a view taken along the line 33 of Fig. 2; and
Fig. 4 is a side view of the tube of Figs. 2 and 3 partially broken away to disclose in perspective the arrangement of the electrodes.
According to Fig. l counterelectrodes 1 are arranged in such a manner that they run vertically to the deflecting plane. These counterelectrode plates are put under high positive potential, preferably fluorescent screen potential. The counterelectrodes are in close proximity to the cathode 2, so that a strong field between cathode 2 and these counterelectrodes 1 is set up. A grid, under cathode potential or thereabout, can also be arranged in a known manner between the cathode and the other electrodes.
2,749,465 Patented June 5, 1956 Besides this, a strong and extensive field is generated between deflecting electrode 3 and counterelectrodes 1, when the deflecting electrode 3 in relation to fluorescent screen 4 is under a strong negative potential. Cap 5 covers the cathode, the control electrode and the counterelectrodes. By means of this arrangement a substantially larger maximum shadow angle 6 of approximately is achieved. The remaining luminous angle is represented by the shaded area. By means of this arrangement, therefore, a substantial increase in the sensitivity of tuning indicators is obtained. Another advantage of this arrangement is that the deflecting electrode does not have to be any larger than those used in the usual system, so that the stream of electrons from the cathode to the deflecting electrode does not increase either. According to Fig. 2 the counterelectrodes 1 are not placed in a vertical plane to the plane thru the cathode 2 and the control electrode, but inclined towards this plane. This makes the deflecting field between the cathode and counterelectrode still more efifective. Arrangements of this type permit maximum shadow angles 7 of approximately This arrangement is of particular importance for visual indicating devices for electric voltages in which the ray generating system is arranged near the periphery of the tubes. The shadow angle then practically covers the whole fluorescent screen if the deflecting electrode is put under cathode potential. In visual indicating devices of the type described above-with very large maximum shadow anglesthe edges of the luminous sectors are not straight lined without further ado, due to the extensive deflecting fields. However a straight line defining of the sectors is desired, in order to make precise reading possible, especially if a scale or like marking is to be put on the fluorescent screen. According to the invention a straight line defining of the luminous sectors can be achieved by arching the pin like deflecting electrode 10 so that a straight line defining of the luminous sectors will result.
The form of the necessary arch is best found by experimenting, as it is dependent upon the form of the counterelectrode, the distance between the various electrodes as well as the form of the fluorescent screen. Hereby it is of importance to keep the surface of the deflecting electrode as small as possible, in order to keep the controlling current, especially at strong positive deflecting potential nearly screen potential as small as possible. Fig. 3 shows a section of Fig. 2 along line 33. The deflecting rod 10 is arched. It has an oval, prismatic or elliptical cross section. The purpose of this is to reduce the control electrode current.
While I have described above the principles of my invention in connection with visual indicating device for electric voltages it is to be clearly understood, that this description is made only by way of example and not as a limitation to the scope of my invention as Set forth in the objects and in the accompanying claims.
What I claim is:
1. An indicator tube comprising an elongated cathode, a fluorescent screen at least partially surrounding said cathode and adapted to be illuminated by electron bombardment therefrom, an electron deflection electrode mounted on one side of said cathode intermediate the cathode and the screen, a pair of elongated counterelectrodes extending parallel to said cathode adjacent thereto, said counterelectrodes and cathode lying in a plane substantially normal to the plane through said deflection electrode and cathode, said counterelectrodes being plates whose width extends at an angle to the plane through said counterelectrodes and cathode.
2. An indicator tube according to claim 1 wherein the plates forming the counterelectrodes, the cathode and the deflection electrode are all mounted towards the periphcry of the screen on one side of the center of said screen.
3. An indicator tube comprising an elongated cathode, a fluorescent screen at least partially surrounding said cathode and adapted to be illuminated by electron bombardment therefrom, an electron deflection electrode mounted on one side of said cathode intermediate the cathode and the screen, a pair of elongated counterelectrodes extending parallel to said cathode adjacent thereto, said counterelectrodes and cathode lying in a plane substantially normal to the plane through said deflection electrode and cathode, said counterelectrodes, said cath- 4 ode and deflection electrode all being mounted towards the periphery of said fluorescent screen on the same side of the center of said screen.
References Cited in the file of this patent UNITED STATES PATENTS
US209146A 1940-07-23 1951-02-02 Visual indicating device for electric voltages Expired - Lifetime US2749465A (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US346918A US2317460A (en) 1940-07-23 1940-07-23 Electron ray indicating device
US423705A US2394857A (en) 1940-07-23 1941-12-20 Electron ray indicating device
DE703660X 1950-07-08
DEL14079U DE1790489U (en) 1940-07-23 1950-07-08 THERMOMETER-LIKE VOLTAGE INDICATOR TUBE.
DE742466X 1950-11-11
DE737668X 1951-09-05
DEST16366A DE1121234B (en) 1940-07-23 1960-04-16 Display tubes with two display systems
DEP0038757 1966-02-11

Publications (1)

Publication Number Publication Date
US2749465A true US2749465A (en) 1956-06-05

Family

ID=32913417

Family Applications (6)

Application Number Title Priority Date Filing Date
US346918A Expired - Lifetime US2317460A (en) 1940-07-23 1940-07-23 Electron ray indicating device
US423705A Expired - Lifetime US2394857A (en) 1940-07-23 1941-12-20 Electron ray indicating device
US209146A Expired - Lifetime US2749465A (en) 1940-07-23 1951-02-02 Visual indicating device for electric voltages
US256941A Expired - Lifetime US2712612A (en) 1940-07-23 1951-11-10 Voltage reference indicating valve
US307188A Expired - Lifetime US2820916A (en) 1940-07-23 1952-08-30 Tuning indicator valve of small dimension and a high sensitivity
US101296A Expired - Lifetime US3161800A (en) 1940-07-23 1961-04-06 Indicator tube having two indication systems

Family Applications Before (2)

Application Number Title Priority Date Filing Date
US346918A Expired - Lifetime US2317460A (en) 1940-07-23 1940-07-23 Electron ray indicating device
US423705A Expired - Lifetime US2394857A (en) 1940-07-23 1941-12-20 Electron ray indicating device

Family Applications After (3)

Application Number Title Priority Date Filing Date
US256941A Expired - Lifetime US2712612A (en) 1940-07-23 1951-11-10 Voltage reference indicating valve
US307188A Expired - Lifetime US2820916A (en) 1940-07-23 1952-08-30 Tuning indicator valve of small dimension and a high sensitivity
US101296A Expired - Lifetime US3161800A (en) 1940-07-23 1961-04-06 Indicator tube having two indication systems

Country Status (10)

Country Link
US (6) US2317460A (en)
AT (1) AT269298B (en)
BE (6) BE504546A (en)
CH (1) CH455948A (en)
DE (4) DE1790489U (en)
ES (1) ES336625A1 (en)
FR (7) FR1033240A (en)
GB (10) GB727133A (en)
NL (7) NL6701866A (en)
SE (1) SE313122B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822494A (en) * 1952-03-20 1958-02-04 Philips Corp Electron beam-tuning-indication tube

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DE1069674B (en) * 1959-11-26
US2513908A (en) * 1940-07-23 1950-07-04 Gen Electric Electric discharge device of the indicator type
BE501568A (en) * 1940-07-23
DE950946C (en) * 1940-07-23 1956-10-18 Lorenz C Ag Voltage comparison indicator tubes
DE973132C (en) * 1940-07-23 1959-12-10 Standard Elek K Lorenz Ag Voltage comparison indicator tubes
CH293547A (en) * 1949-09-09 1953-09-30 Siemens Ag Electron tubes with fluorescent screens, in particular for tuning display
US2600063A (en) * 1951-02-20 1952-06-10 Leon S Maloof Visual electron flow indicator
US2799790A (en) * 1951-05-19 1957-07-16 Int Standard Electric Corp Multi-range voltage indicating valve
US2736834A (en) * 1951-08-10 1956-02-28 Hartford Nat Bank & Trust Co Electron discharge tube comprising a luminescent screen
BE517504A (en) * 1952-02-08
BE519456A (en) * 1952-04-26
US2767341A (en) * 1952-08-12 1956-10-16 Dunlee Corp Anode structure for double filament x-ray tube
DE1029490B (en) * 1952-10-01 1958-05-08 Telefunken Gmbh Display tubes with two independently controllable deflection electrodes or electrode systems lying parallel to the cathode
DE1059053B (en) * 1957-04-20 1959-06-11 Loewe Opta Ag Tuning display device with comparative tuning display for high-frequency receivers
DE1045557B (en) * 1957-07-04 1958-12-04 Tesla Np Tuning indicator tubes with laterally arranged luminous surfaces
US2954493A (en) * 1959-06-08 1960-09-27 Sylvania Electric Prod Flip-flop indicator
GB2144575B (en) * 1983-08-05 1988-04-20 English Electric Valve Co Ltd Cathedolumanescent display arrangements

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US2122268A (en) * 1937-09-29 1938-06-28 Rca Corp Tuning indicator tube
US2175700A (en) * 1938-03-29 1939-10-10 Rca Corp Electronic indicating device
US2243408A (en) * 1938-05-12 1941-05-27 Rca Corp Visual tuning indicator
US2273800A (en) * 1939-08-09 1942-02-17 Hygrade Sylvania Corp Fluorescent type indicator tube
US2273142A (en) * 1940-05-10 1942-02-17 Rca Corp Visual tuning indicator

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US2108880A (en) * 1934-04-27 1938-02-22 Rca Corp Electric discharge tube
GB469755A (en) * 1934-10-30 1937-07-26 Bbc Brown Boveri & Cie Improvements in and relating to electric, astatic regulating arrangements
US2051188A (en) * 1935-06-27 1936-08-18 Rca Corp Tuning indicator tube
US2219506A (en) * 1936-10-08 1940-10-29 Telefunken Gmbh Tuning indicator circuit
US2243034A (en) * 1937-06-03 1941-05-20 Hygrade Sylvania Corp Fluorescent indicating device
US2105818A (en) * 1937-06-22 1938-01-18 Rogers Radio Tubes Ltd Voltage indicating electron discharge tube
US2311672A (en) * 1937-08-06 1943-02-23 Raytheon Production Corp Electron discharge tube with fluorescent screen
BE434519A (en) * 1938-05-27
US2927237A (en) * 1940-07-23 1960-03-01 Int Standard Electric Corp Voltage indicator tubes
US2513908A (en) * 1940-07-23 1950-07-04 Gen Electric Electric discharge device of the indicator type
DE1029940B (en) * 1940-07-23 1958-05-14 Siemens Ag Dry rectifier system with tablet-shaped rectifier elements
DE909008C (en) * 1940-07-23 1954-04-12 Telefunken Gmbh Voting indicator tubes
DE973132C (en) * 1940-07-23 1959-12-10 Standard Elek K Lorenz Ag Voltage comparison indicator tubes
DE1038201B (en) * 1940-07-23 1958-09-04 Philips Patentverwaltung Voltage indicator tubes
BE501568A (en) * 1940-07-23
US2315945A (en) * 1941-12-26 1943-04-06 Gen Electric Calibrating device
US2318140A (en) * 1942-03-30 1943-05-04 Leeds & Northrup Co Visual indicator
US2366320A (en) * 1942-08-29 1945-01-02 Rca Corp Voltage indicator
CH293547A (en) * 1949-09-09 1953-09-30 Siemens Ag Electron tubes with fluorescent screens, in particular for tuning display
BE517504A (en) * 1952-02-08
DE1059116B (en) * 1954-04-28 1959-06-11 Standard Elektrik Lorenz Ag Voting indicator tubes
GB829553A (en) * 1955-11-21 1960-03-02 Arthur Adams Cellular back loud-speaker enclosure

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US2122268A (en) * 1937-09-29 1938-06-28 Rca Corp Tuning indicator tube
US2175700A (en) * 1938-03-29 1939-10-10 Rca Corp Electronic indicating device
US2243408A (en) * 1938-05-12 1941-05-27 Rca Corp Visual tuning indicator
US2273800A (en) * 1939-08-09 1942-02-17 Hygrade Sylvania Corp Fluorescent type indicator tube
US2273142A (en) * 1940-05-10 1942-02-17 Rca Corp Visual tuning indicator

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US2822494A (en) * 1952-03-20 1958-02-04 Philips Corp Electron beam-tuning-indication tube

Also Published As

Publication number Publication date
NL76700C (en)
GB721460A (en) 1955-01-05
NL81844C (en)
DE1252326B (en)
GB737668A (en) 1955-09-28
BE504546A (en)
US2394857A (en) 1946-02-12
DE1121234B (en) 1962-01-04
FR65462E (en) 1956-02-21
NL159457B (en)
BE507046A (en)
BE512116A (en)
DE1790489U (en) 1959-06-18
GB978223A (en) 1964-12-16
US2317460A (en) 1943-04-27
GB1165995A (en) 1969-10-01
GB742466A (en) 1955-12-30
AT269298B (en) 1969-03-10
SE313122B (en) 1969-08-04
NL6701866A (en) 1967-08-14
NL78923C (en)
FR61447E (en) 1955-05-04
FR1511277A (en) 1968-01-26
GB700192A (en) 1953-11-25
FR65361E (en) 1956-02-09
CH455948A (en) 1968-05-15
FR65210E (en) 1956-02-07
FR1059872A (en) 1954-03-29
BE501567A (en)
DE1564490B1 (en) 1970-08-20
BE501568A (en)
GB730548A (en) 1955-05-25
FR1033240A (en) 1953-07-09
NL168257B (en)
BE513971A (en)
GB838078A (en) 1960-06-22
US2712612A (en) 1955-07-05
GB727133A (en) 1955-03-30
ES336625A1 (en) 1968-01-01
NL89130C (en)
US3161800A (en) 1964-12-15
GB703660A (en) 1954-02-10
US2820916A (en) 1958-01-21

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