US2188580A - Cathode ray deflecting circuit - Google Patents

Cathode ray deflecting circuit Download PDF

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Publication number
US2188580A
US2188580A US108950A US10895036A US2188580A US 2188580 A US2188580 A US 2188580A US 108950 A US108950 A US 108950A US 10895036 A US10895036 A US 10895036A US 2188580 A US2188580 A US 2188580A
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United States
Prior art keywords
anode
potential
resistance
alternating
plates
Prior art date
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Expired - Lifetime
Application number
US108950A
Inventor
Schlesinger Kurt
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LOEWE RADIO Inc
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LOEWE RADIO Inc
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
Priority to NL44767D priority Critical patent/NL44767C/xx
Priority to DE1932R0086243 priority patent/DE691490C/en
Priority to DER86502D priority patent/DE720886C/en
Priority to DER90790D priority patent/DE720582C/en
Priority to DER87622D priority patent/DE715380C/en
Priority to US694915A priority patent/US2083204A/en
Priority to GB29263/33A priority patent/GB432209A/en
Priority to FR763894D priority patent/FR763894A/en
Priority to GB9247/34A priority patent/GB438882A/en
Priority to US717307A priority patent/US2077271A/en
Priority claimed from US717307A external-priority patent/US2077271A/en
Priority to FR44618D priority patent/FR44618E/en
Application filed by LOEWE RADIO Inc filed Critical LOEWE RADIO Inc
Priority to US108950A priority patent/US2188580A/en
Application granted granted Critical
Publication of US2188580A publication Critical patent/US2188580A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/80—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/12—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor

Definitions

  • the object of the invention is an additional makes it possible to operate with considerablyv lower scanning potentials.
  • the middle plate is divided into two completely independent parts, both of which have the same D. C. potential (positive in relation to the two outer plates).
  • the scanning potential is supplied simultaneously and in phase opposition to the one outer plate and'to the part of the middle plate directed towards the luminous screen.
  • i is the anode of the Braun tube, 2 a deflecting plates system with the two outer plates 3 and 4 and the inner plate comprising the two parts 5 and 6.
  • the plates 3 and 4 are maintained at anode (earth) potential as regards D. C. conditions, whilst the middle plate is positively biased to such extent in relation to the plates 3 and '4 that the ray entering the space between the plates 3 and 5 is bent into the space between: the plates 4 and 5, and emerges from this space in its state of rest parallel to the direction of its entry but displaced in, relation thereto to the extent of a few millimetres.
  • the deflecting potential provided by the generator- 8 is amplified in the amplifier tube 9, preferably a pentode, and then applied to the lower deflecting plate 4 over a condenser ill.
  • the deflecting potential of reverse phase thus produced is applied over the condenser I l and the line IE to the plate 6. tap at the anode resistance. is so selected that the defiecting potentials of reverse phase taken from the two pentodes have equal amplitudes.
  • the anode potential for both pentodes is taken fromthe same potential source It and is'ap b plied to the pentodes over the potentiometer ll.
  • the condenser l8 may be selected at .5 mi., 30 the condensers l 9 and 20 each at 1 mi. the resistances 2
  • the resistance 1 35 should preferably always be small in relation to the-working resistance.
  • the arrangement according to the invention is for use both in the line frequency deflection as well as the frame frequency deflection por- 40 tions.
  • the condensers 25, 26 and M should each be selectedat-1000 cm., and the two anode resistances each at 20,000 ohms. 45
  • the condensers 25, 26 and M may be selected preferably each at .1 mf., and the anode resistances H and 2! each at .1 megohm.
  • the position of the tapping point, as already stated, 50 is determined by the amplification of the pentodes in respect of the different frequencies, and is always selected to be such that the deflecting potentials possess the same amplitude.
  • the frame frequency deflection portion permits of better amplification than the line frequency deflection portion (approximately 100220) it is necessary, more particularly in those cases in which the complete raster is transmitted by wireless, to modulate the raster transmitter ac-' cordingly.
  • Connection device for operating the electr c static deflecting system of a Braun tube comprising two outer plates and two middle plates, said device consisting of a circuit comprising means for'producing an alternating voltage, an
  • amplifier tube having a cathode, an anode, and
  • control grid means for applying said alternating voltage to said control, grid, a first anode resistance having one of its ends directly connected to said anode, so that an alternating potential may be taken from this end, a tap on said anode resistance, a phase-reversingtube having a cathode, an anode, and a control grid, means 2.
  • Circuit comprising meansfor producing an alternating scanning potential'relative to a fixed potential, means for producing in relation to the same fixed potential a further alternating potential equal in amplitude to said scanning potential but reversed in phase with respect to said scanning potential, means to apply one of said two alternating potentials to one of said outer plates, and means to apply the other one of said two alternating potentials to one of said middle plates, a circuit comprising means for producing an alternating voltage, an amplifier tube having a cathode, an anode, and a control grid, means for applying said alternating voltage to said'control grid, a first anode resistance having one of its ends directly connected to said anode, so that an alternating potential may be taken from this end, a tap on said anode resistance, a phasereversing tube.
  • a common anode voltage source for supplying the anodes of both said am,- plifier and phase reversing 'tubes with anode voltages, a common resistance having one of its ends connected to the said'first anode resistance

Description

Jam 30, 1940. K; 5 5 2,188,580
CATHODE RAY DEFLECTING CIRCUIT Original. Filed March 26; 1934 Patented Jan. 30, 1940 Nir mes cA'rnonE RAY DEFLECTING cmc rr, 1
Kurt Schlesinger, Berlin, Germany, assignor, by mesne assignments, to Loewe Radio, Inc., a corporation of New York i Original application March 26', 1934, Serial No. v
717,307, now Patent No. 2,077,271, dated April. 13, 1937. Divided and this application November 3, 1936, Serial No. 108,950.' In Germany March 29, 1933 3 Claims; (01. 250-275 the space between the middle plate and the lower plate, and then leaves this space, in the state of rest, parallel to the direction of its entry into the system. After being bent into the space .between the middle plate and the lower plate, the cathode ray undergoes scanning deflections in this latter space. In this arrangement the middle plate is maintained at a constant potential, whilst the full'scanning deflection potential is applied to the lower deflecting plate. In this arrangement considerable potentials (of the order of about 400 volts) are required fora complete modulation.
The object of the invention is an additional makes it possible to operate with considerablyv lower scanning potentials.
According to the invention, the middle plate is divided into two completely independent parts, both of which have the same D. C. potential (positive in relation to the two outer plates).
The scanning potential is supplied simultaneously and in phase opposition to the one outer plate and'to the part of the middle plate directed towards the luminous screen.
In this manner it is possible to perform fullrange control with half the potential otherwise required.
A form of embodiment of the invention is illustrated by way of example in the single figure of the drawing.
Herein i is the anode of the Braun tube, 2 a deflecting plates system with the two outer plates 3 and 4 and the inner plate comprising the two parts 5 and 6. The plates 3 and 4 are maintained at anode (earth) potential as regards D. C. conditions, whilst the middle plate is positively biased to such extent in relation to the plates 3 and '4 that the ray entering the space between the plates 3 and 5 is bent into the space between: the plates 4 and 5, and emerges from this space in its state of rest parallel to the direction of its entry but displaced in, relation thereto to the extent of a few millimetres. The
plates 5 and B are connected with each other over a high ohmic resistance 1 of about 10 ohms and are accordingly maintained at equal potentials, as regards "D. C. conditions whilst as regards alternating current conditions the same possess diifere'nt potentials. 6"
The deflecting potential provided by the generator- 8 is amplified in the amplifier tube 9, preferably a pentode, and then applied to the lower deflecting plate 4 over a condenser ill.
The control grid I2 of the phase-reversing tube 1 0 l3, which'preferably is also in the form of a pentode, is connected with the anode resistance ll of the pentode 9. The deflecting potential of reverse phase thus produced is applied over the condenser I l and the line IE to the plate 6. tap at the anode resistance. is so selected that the defiecting potentials of reverse phase taken from the two pentodes have equal amplitudes. The anode potential for both pentodes is taken fromthe same potential source It and is'ap b plied to the pentodes over the potentiometer ll. Since the alternating potentials occurring in the anode circuits of the two pentodes are in this manner causedcornpletely to compensate each other, it is rendered possible by the arrangement a according to the invention to reduce to a minimum, or possibly even omit entirely, special steadying means otherwise always necessary in the anode circuit.
The condenser l8 may be selected at .5 mi., 30 the condensers l 9 and 20 each at 1 mi. the resistances 2|, 22, 23 at .1 megohm, the parts of the resistance IT at the two sides of the tap each at 5000 ohms, the resistance 24 at 25,000 ohms, and
the resistance 1' at .1 megohm. The resistance 1 35 should preferably always be small in relation to the-working resistance.-
The arrangement according to the invention is for use both in the line frequency deflection as well as the frame frequency deflection por- 40 tions.
For the line-frequency deflection portion the condensers 25, 26 and M should each be selectedat-1000 cm., and the two anode resistances each at 20,000 ohms. 45
From the frame-frequency deflection portion the condensers 25, 26 and M may be selected preferably each at .1 mf., and the anode resistances H and 2! each at .1 megohm. The position of the tapping point, as already stated, 50 is determined by the amplification of the pentodes in respect of the different frequencies, and is always selected to be such that the deflecting potentials possess the same amplitude.
Variations of the above dimensions cited as 55 The for coupling the control grid of said phaseexamples are of course possible without departing from the prinicple of the invention.
Since the frame frequency deflection portion permits of better amplification than the line frequency deflection portion (approximately 100220) it is necessary, more particularly in those cases in which the complete raster is transmitted by wireless, to modulate the raster transmitter ac-' cordingly. p
It is also possible to impart difierent direct potentials to the plates and 5-, and in this man ner to accomplish that the ray in the state of.
rest emerges from the space between the plates 6 and 4 displaced at any desired angle in relation to its direction of entry. In this manner it is possible to avoid the displacement otherwise occurring when using the system according to the invention, and to accomplish that the ray meets exactly against the centre of the image screen when in the state of rest.
I claim:
1. Connection device for operating the electr c static deflecting system of a Braun tube comprising two outer plates and two middle plates, said device consisting of a circuit comprising means for'producing an alternating voltage, an
amplifier tube having a cathode, an anode, and
a control grid, means for applying said alternating voltage to said control, grid, a first anode resistance having one of its ends directly connected to said anode, so that an alternating potential may be taken from this end, a tap on said anode resistance, a phase-reversingtube having a cathode, an anode, and a control grid, means 2. Circuit comprising meansfor producing an alternating scanning potential'relative to a fixed potential, means for producing in relation to the same fixed potential a further alternating potential equal in amplitude to said scanning potential but reversed in phase with respect to said scanning potential, means to apply one of said two alternating potentials to one of said outer plates, and means to apply the other one of said two alternating potentials to one of said middle plates, a circuit comprising means for producing an alternating voltage, an amplifier tube having a cathode, an anode, and a control grid, means for applying said alternating voltage to said'control grid, a first anode resistance having one of its ends directly connected to said anode, so that an alternating potential may be taken from this end, a tap on said anode resistance, a phasereversing tube. having a cathode, an anode, and a control grid, means for coupling the control grid of said phase-reversing tube to said tap, a second anode resistance having one of its ends directly connected to the anode of said phase reversing tube so that a further alternating potential reversed in phase with respect to the first said alternating potential may be taken from. the last mentioned end, a common anode voltage source, for supplying the anodes of both said am,- plifier and phase reversing 'tubes with anode voltages, a common resistance having one of its ends connected to the said'first anode resistance,
and its other end to said second anode resistance, a point of said common resistance intermediate of its ends being connected to the positive end of said anode voltage source, the cathode of said amplifier and phase-reversing tubes being maintainedat the potential of the negative end of saidanode voltage source, means for adjusting said tap to make the amplitude of the second alternating potential relatively to a fixed potential equal to the amplitude of the first said alternating potential relatively to the same said fixed potential, means for coupling one of said alternating potentials to one of said outer plates and means for coupling the other one of said alter hating potentials to one of said middle plates.
3. The invention as claimed in claim 1, including means for adjusting said intermediate point of said common resistance to cause the alternating anode voltages to compensate each other in the anode feed line.
KURT SCI-ILESINGER.
US108950A 1932-10-25 1936-11-03 Cathode ray deflecting circuit Expired - Lifetime US2188580A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
NL44767D NL44767C (en) 1932-10-25
DE1932R0086243 DE691490C (en) 1932-10-25 1932-10-25 Braun tubes, especially for television purposes
DER86502D DE720886C (en) 1932-10-25 1932-11-27 Braun tubes, especially for television purposes
DER90790D DE720582C (en) 1932-10-25 1933-02-08 Braun tubes for television purposes
DER87622D DE715380C (en) 1932-10-25 1933-03-30 Braun tube with a three-part baffle system
GB29263/33A GB432209A (en) 1932-10-25 1933-10-23 Braun tubes, and circuits therefor
US694915A US2083204A (en) 1932-10-25 1933-10-23 Braun tube
FR763894D FR763894A (en) 1932-10-25 1933-10-25 Cathode ray tube
GB9247/34A GB438882A (en) 1932-10-25 1934-03-24 Braun tubes and circuits therefor
US717307A US2077271A (en) 1932-10-25 1934-03-26 Braun tube
FR44618D FR44618E (en) 1932-10-25 1934-03-28 Cathode ray tube
US108950A US2188580A (en) 1932-10-25 1936-11-03 Cathode ray deflecting circuit

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE432209X 1932-10-25
DER87622D DE715380C (en) 1932-10-25 1933-03-30 Braun tube with a three-part baffle system
US717307A US2077271A (en) 1932-10-25 1934-03-26 Braun tube
US108950A US2188580A (en) 1932-10-25 1936-11-03 Cathode ray deflecting circuit

Publications (1)

Publication Number Publication Date
US2188580A true US2188580A (en) 1940-01-30

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ID=32074453

Family Applications (2)

Application Number Title Priority Date Filing Date
US694915A Expired - Lifetime US2083204A (en) 1932-10-25 1933-10-23 Braun tube
US108950A Expired - Lifetime US2188580A (en) 1932-10-25 1936-11-03 Cathode ray deflecting circuit

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US694915A Expired - Lifetime US2083204A (en) 1932-10-25 1933-10-23 Braun tube

Country Status (5)

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US (2) US2083204A (en)
DE (1) DE715380C (en)
FR (2) FR763894A (en)
GB (2) GB432209A (en)
NL (1) NL44767C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460142A (en) * 1945-01-30 1949-01-25 Gen Electric Electronic calibrating means for indicating instruments in pulse echo systems

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE923686C (en) * 1935-11-13 1955-02-21 Interessengemeinschaft Fuer Ru Deflection systems for cathode ray tubes
DE756688C (en) * 1937-09-18 1954-01-25 Aeg Braun tubes, especially for measuring or television purposes, with two or more pairs of deflector plates rotated against one another
US2438709A (en) * 1942-08-06 1948-03-30 Hartford Nat Bank & Trust Co Thermionic tube having secondary electron emissive electrode with surface and form variations
US2489330A (en) * 1947-01-20 1949-11-29 Farnsworth Res Corp Neutralized cathode-ray deflection tube
US2837691A (en) * 1955-08-24 1958-06-03 Kaiser Ind Corp Electronic device
US2911557A (en) * 1956-08-23 1959-11-03 Gen Lab Associates Inc Analogue computer
US2921227A (en) * 1957-05-23 1960-01-12 Mackay Donald Maccrimmon Cathode ray tubes and apparatus utilizing such tubes
WO2015112629A1 (en) * 2014-01-22 2015-07-30 Cameron Rig Solutions, Inc. Hydraulically deactivated clamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460142A (en) * 1945-01-30 1949-01-25 Gen Electric Electronic calibrating means for indicating instruments in pulse echo systems

Also Published As

Publication number Publication date
FR763894A (en) 1934-05-08
NL44767C (en)
US2083204A (en) 1937-06-08
DE715380C (en) 1941-12-22
GB438882A (en) 1935-11-25
FR44618E (en) 1935-03-19
GB432209A (en) 1935-07-23

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