US2075142A - Braun tube - Google Patents

Braun tube Download PDF

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Publication number
US2075142A
US2075142A US694135A US69413533A US2075142A US 2075142 A US2075142 A US 2075142A US 694135 A US694135 A US 694135A US 69413533 A US69413533 A US 69413533A US 2075142 A US2075142 A US 2075142A
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United States
Prior art keywords
plates
anode
pairs
deflecting
pair
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
US694135A
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English (en)
Inventor
Schlesinger Kurt
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Individual
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Individual
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Publication date
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Publication of US2075142A publication Critical patent/US2075142A/en
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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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/74—Deflecting by electric fields only

Definitions

  • the plate deflection potentials should be provided with values approximately agreeing with those resulting from the above formula, and should in no way exceed the same to an appreciable extent.
  • the ratio between the spacing of the pairs of plates in relation to each other and the spacing of the plates themselves is selected to be equal to or greater than 3 (the essential feature in this connection is the (Cl. Z50-27.5)
  • the 5 deilecting plates with a certain tilt in relation to each other.
  • the one plate may be arranged parallel to the axis, and the other plate furnished with l0 a certain inclination in relation to the first plate, whereby a considerable simplification in the con-v struction of the system is obtained.
  • This arrangement is particularly suitable in connection with tubes with a so-called bending 15 of the ray, i. e., in the case of tubes in which between the anode and the first pair of deflecting plates there is provided a deflecting element imparting a constant preliminary deflection 'to the cathode ray.
  • the tilt of the one 20 deilecting plate of both systems in relation to thesecond plate parallel to the axis may be selected in such fashion that the preliminarily deflected ray enters the deflecting systems lapproximately parallel to the tilted plate. 25
  • a particular advantage of this arrangement resides in the fact that it is possible by altering the inclination of the plates to vary the sensitiveness (i. e., the movement in mm. per volt of de- 35 ecting potential) within wide limits, without varying at the same time the size of the image.
  • FIG. 1 shows the neck portion of a 40 Braun tube according to the invention, incorporating the electrode system, whereas Fig. 2 shows the conically enlarged portion of the tube and should be read as the right hand continuation of Fig. 1.
  • I is the wall of the tube, 2 the Wehnelt cylinder, which is secured to the holder 3 and within which there is arranged the cathode 4, 5 a preliminary anode, 6 a concentration cylinder and 1 the after-acceleration anode.
  • 8 is 50 the deflecting element, which is composed of two angle plates 2,0 and 2
  • the plate 20 of this element is conductively connected with the anode, whilst the plate 2l receives in relation to the plate 20 a constant bias from the battery I 6.
  • 9 and I 2 are the two pairs of deflecting plates.
  • the tube according to the invention is devoid of cross and cross-current defect, and permits of the production of images completely free of distortion with the smallest application of potential.
  • a Braun tube for television purposes which comprises an evacuated envelope, a cathode and an anode arranged in operative relationship thereto, a Wehnelt cylinder surrounding said cathode, a picture receiving screen, one pair of deflecting plates arranged between said anode and said screen, andra further pair of deilecting plates arranged between the first said pair and the screen, said two pairs facing one another, characterized in thatat least the plates ofthe further said pair of deflecting plates are inclined with respect to one another and that the distance between .said two pairs of Vdeflecting plates is at least three times ⁇ as great as the distance between the plates of the furthersaid pair at the end facing said anode.
  • a Braun tube for television purposes which comprises an evacuated envelope, a cathode and an anode arranged in operative relationship thereto, a Wehnelt cylinder surrounding said cathode, a picture receiving screen, one pair of deflecting plates arranged between said anode 2,075,142 i y and said screen, and a further pair of deecting' platesy arranged between the rst said pair and the screen, said two pairs facing one another, characterized in that means are arranged between said anode and the first said pair of deecting plates for imparting a constant deection to the ray in two directions, perpendicular to one another, that at least the plates of the further said pair of Y deflecting plates are inclined with yrespect to one another, and that the distance between said two pairs ofdeflecting plates is at least three Vtimes as great as the distance between the plates of the further said pair of deecting plates at the end facing the anode.
  • a Braun tube for television purposes which comprises an evacuated envelope, a cathode and an anode, arranged in operative relationship thereto, a Wehnelt cylinder surrounding said cathode, a picture receiving screen, and two pairs of deflecting plates arranged between said anode and said screen, said two pairs facing one another, characterized in that the plates of at least one pair of deflecting plates have a length of approximately 15 mm. and a distance of at least 1.5 mm. from one another at their ends facing the anode, and a distance of at least 4 mm. from one another at their ends facing the screen, and that the distance between said two pairs of deflecting plates is at least three times as great as the distance between the plates of. the pair of deflecting platesrwhich is arranged next to said screen atrthe end facing said anode.
  • a Braun ktube for television purposes whic comprises an evacuated envelope, a cathode and an anode arranged in operative relationship thereto, a Wehnelt ⁇ cylinder surrounding said cathode, a picture receiving screen and two pairs of'deflectin-g platescmounted in axial 'consecution to each other without any further element being disposed therebetween, characterized in that the distance between said pairs of deflecting plates is at least three times as great as the distance between the two plates of eachrof said pairs of deflecting plates.
US694135A 1932-10-21 1933-10-18 Braun tube Expired - Lifetime US2075142A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2075142X 1932-10-21

Publications (1)

Publication Number Publication Date
US2075142A true US2075142A (en) 1937-03-30

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ID=7983724

Family Applications (1)

Application Number Title Priority Date Filing Date
US694135A Expired - Lifetime US2075142A (en) 1932-10-21 1933-10-18 Braun tube

Country Status (3)

Country Link
US (1) US2075142A (xx)
FR (1) FR762605A (xx)
NL (1) NL51563C (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2466065A (en) * 1944-09-08 1949-04-05 Tung Sol Lamp Works Inc Direct-current amplifier and circuit
US2600463A (en) * 1948-01-26 1952-06-17 Csf Method for correcting electronic optical systems
US2896112A (en) * 1945-08-20 1959-07-21 Philip H Allen Cathode ray tube apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2466065A (en) * 1944-09-08 1949-04-05 Tung Sol Lamp Works Inc Direct-current amplifier and circuit
US2896112A (en) * 1945-08-20 1959-07-21 Philip H Allen Cathode ray tube apparatus
US2600463A (en) * 1948-01-26 1952-06-17 Csf Method for correcting electronic optical systems

Also Published As

Publication number Publication date
NL51563C (xx)
FR762605A (fr) 1934-04-14

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