US2234720A - Electron discharge apparatus - Google Patents

Electron discharge apparatus Download PDF

Info

Publication number
US2234720A
US2234720A US289428A US28942839A US2234720A US 2234720 A US2234720 A US 2234720A US 289428 A US289428 A US 289428A US 28942839 A US28942839 A US 28942839A US 2234720 A US2234720 A US 2234720A
Authority
US
United States
Prior art keywords
members
screen
plate
bolt
axis
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
US289428A
Other languages
English (en)
Inventor
Tar Donald R De
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US289428A priority Critical patent/US2234720A/en
Priority to FR867556D priority patent/FR867556A/fr
Application granted granted Critical
Publication of US2234720A publication Critical patent/US2234720A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01J29/54—Arrangements for centring ray or beam

Definitions

  • the centering of the beam is effected by adjustment of a magnetic field producing means such as a solenoid positioned along the axis of the discharge apparatus along which the beam is projected.
  • a magnetic field producing means such as a solenoid positioned along the axis of the discharge apparatus along which the beam is projected.
  • Another of the objects of my present invention is to provide improved means to support such a solenoid, or other means for focusing the electron stream, for independent adjustment in different planes to facilitate centering of the figure on the screen.
  • I have shown at I an electron discharge device such as is commonly used for the reproduction of pictures in television reception, for example.
  • This discharge device has a neck 2 within the right hand end of which the cathode, or so called electron gun, not shown, is supported.
  • This beam of electron is projected outward along the axis of the neck and along the axis of a focusing coil 3 which causes the electron beam to converge and focus on the screen, and a deflection yoke 4, whereupon it finally emerges into the large bulbous end of the tube and impinges upon a screen (not shown) at the left hand of the tube.
  • this coil is mounted in the vertical plane and arranged to produce a magnetic field axially of the discharge device between the pole pieces 8 10 and 8'. If it be tilted from this vertical plane its field then has a vertical component, which tends to deflect the beam horizontally. Similarly, tilting the coil sidewise deflects the beam vertically.
  • the figure produced by the beam upon the screen may be adjusted either vertically, or horizontally, to center it upon the screen.
  • the coil 3 is directly mounted upon an annular plate, or pole piece, 8, which is positioned parallel with, but spaced from, a second annular plate 9, both of which plates are secured to the member 5 by bolts II], II, l2 and I3, only the 30 first three of which are shown in Fig. 1.
  • the position of these bolts is better shown in Fig. 2.
  • One pair of these bolts Ill-I2 is positioned one above the neck of the discharge device and the other below it so as to define a vertical plane 5 including the axis of the coil 3.
  • These bolts carry spacer members l4 and I5 between annular members 8 and 9 so that these members are positioned at a definite distance apart in this Vertical plane.
  • Fig. 3 is an edgewise sectional View along the line 33 of Fig. 2 looking toward the right. It will be seen from this figure that upon adjustment of the bolt Ill both of plates 8 and 9 are rotated about a pivot determined by the spacer member I! on the bolt [3 and a spacer member it on bolt II which is shown in Fig. 1, this adjustment tending to compress or release spring it on bolt [2. Movement of bolt H] to the left may move plate 9 to the position indicated by line 23 and plate 8 to the position indicated by line 24 thus tensioning spring [8. Movement of bolt It to the right allows plate 8 to move under influence of spring Is to the position indicated by line 25 and plate 9 to the position indicated by line 26. In this way the coil 3, which is mounted upon member 8 may be rotated about the horizontal axis.
  • each adjustment is made without encountering any substantial frictional forces, the adjustment either being aided by a spring or resisted thereby. Since no substantial frictional forces are involved, the adjustment is smoothly and readily effected, that is, it does not involve storing forces, which are resisted by friction and which are suddenly released to produce a jerky motion of the elements to be adjusted. Instead, each increment of adjustment of the bolts l0 and II efiec-ts a corresponding adjustment of the coil 3.
  • Fig. 5 is a detail View showing somewhat more clearly the spacer members positioned upon any one of the bolts and between members 8 and 9.
  • the spacer members [6 and I! between members 5 and 9 are similarly arranged and snaped.
  • Fig. 6 shows an arrangement similar to that in Fig. 1 but in which the focusing solenoid is replaced by an annular permanent magnet 3! arranged similarly to produce a magnetic field axially of the discharge device but adjustable as in Fig. 1.
  • This magnet preferably is one of the alloy commonly known as Alnico comprising aluminum, nickel, and cobalt and it is arranged between the pole pieces 8 and 3 so as to produce the field within the discharge device as better indicated at 3! in Fig. '7.
  • the plate 8 carrying the magnet is arranged to be adjusted as in Fig. 1.
  • Fig. 8 is an end view of Fig. 6 showing the pole piece 8' of rectangular shape having the adjustable shunt 32 positioned at one corner thereof. If desired, additional such shunts might be employed.
  • a support for said device comprising a plurality of means for adjusting said device in planes extending at substantially right angles to each other and intersecting in said beam, each adjusting means adjusting the device in its respective plane about an axis in the other plane and means to retain the device in position in either of said planes during adjustment of the device in the other plane, and resilient means operating substantially free from friction to resist each of said adjusting means.

Landscapes

  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
US289428A 1939-08-10 1939-08-10 Electron discharge apparatus Expired - Lifetime US2234720A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US289428A US2234720A (en) 1939-08-10 1939-08-10 Electron discharge apparatus
FR867556D FR867556A (fr) 1939-08-10 1940-10-24 Perfectionnements aux appareils à décharge électronique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US289428A US2234720A (en) 1939-08-10 1939-08-10 Electron discharge apparatus

Publications (1)

Publication Number Publication Date
US2234720A true US2234720A (en) 1941-03-11

Family

ID=23111490

Family Applications (1)

Application Number Title Priority Date Filing Date
US289428A Expired - Lifetime US2234720A (en) 1939-08-10 1939-08-10 Electron discharge apparatus

Country Status (2)

Country Link
US (1) US2234720A (fr)
FR (1) FR867556A (fr)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440403A (en) * 1945-10-31 1948-04-27 Pye Ltd Focus coil suspension for cathoderay tubes
US2446674A (en) * 1944-02-18 1948-08-10 Bell Telephone Labor Inc Cathode-ray device mounting
US2456399A (en) * 1945-10-24 1948-12-14 Gen Electric Cathode-ray apparatus
US2501516A (en) * 1947-12-31 1950-03-21 Gen Electric Deflecting and focusing device for cathode-ray apparatus
US2521061A (en) * 1948-03-18 1950-09-05 Motorola Inc Combined focus and centering control for cathode ray tubes
US2533689A (en) * 1950-06-28 1950-12-12 Quam Nichols Company Magnetic focusing device
US2533687A (en) * 1949-05-27 1950-12-12 Quam Nichols Company Magnetic focusing device
US2533688A (en) * 1950-01-31 1950-12-12 Quam Nichols Company Focusing device
US2544875A (en) * 1950-03-02 1951-03-13 Pye Ltd Combination centering, focusing, and deflecting device for beam of cathode-ray tubes
US2568668A (en) * 1950-08-18 1951-09-18 Best Mfg Co Inc Cathode-ray tube focusing device of the permanent magnet type
US2568631A (en) * 1950-01-27 1951-09-18 Admiral Corp Focus coil support and control
US2569327A (en) * 1948-08-31 1951-09-25 Rca Corp Electron beam bender
US2569517A (en) * 1949-09-09 1951-10-02 Du Mont Allen B Lab Inc Magnet for cathode-ray tube ion traps
US2579941A (en) * 1949-07-06 1951-12-25 Ferguson Radio Corp Cathode-ray tube
US2580606A (en) * 1951-03-21 1952-01-01 Best Mfg Company Inc Cathode-ray tube focusing device
US2581657A (en) * 1950-07-26 1952-01-08 Myron R Heppner Focusing and centering device for cathode-ray tubes
US2591820A (en) * 1948-02-07 1952-04-08 Pye Ltd Suspension mounting for the focussing device of cathode-ray tubes
US2592185A (en) * 1950-12-09 1952-04-08 Quam Nichols Company Focusing device
US2594099A (en) * 1950-04-22 1952-04-22 Ite Circuit Breaker Ltd Focusing coil for cathode-ray tubes
US2606301A (en) * 1949-02-24 1952-08-05 Pye Ltd Magnetic focusing device for cathode-ray tubes
US2608665A (en) * 1950-07-29 1952-08-26 Gen Electric Permanent magnet focusing device
US2627066A (en) * 1950-05-20 1953-01-27 Rca Corp Positioning structure for cathode-ray tubes
US2648036A (en) * 1946-03-12 1953-08-04 Us Navy Adjustable focusing coil
US2677784A (en) * 1952-09-04 1954-05-04 Edwin I Guthman & Co Inc Electrical apparatus
US2717324A (en) * 1950-05-04 1955-09-06 Emi Ltd Cathode ray tubes
US2733364A (en) * 1956-01-31 flory
US2761989A (en) * 1955-02-28 1956-09-04 Rca Corp Cathode ray tube device
US2828434A (en) * 1952-10-25 1958-03-25 Int Standard Electric Corp Electron beam focussing device
US2889477A (en) * 1955-06-16 1959-06-02 Sylvania Electric Prod Clamp and mounting arrangement
US2922909A (en) * 1955-08-31 1960-01-26 Westinghouse Electric Corp Beam centering apparatus
US2922908A (en) * 1955-08-31 1960-01-26 Westinghouse Electric Corp Retaining device
US3321577A (en) * 1963-07-05 1967-05-23 Conduction Corp Adjustable mount for a cathode ray tube
US4283743A (en) * 1980-04-14 1981-08-11 Motorola, Inc. Yoke mounting assembly for a video camera

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733364A (en) * 1956-01-31 flory
US2446674A (en) * 1944-02-18 1948-08-10 Bell Telephone Labor Inc Cathode-ray device mounting
US2456399A (en) * 1945-10-24 1948-12-14 Gen Electric Cathode-ray apparatus
US2440403A (en) * 1945-10-31 1948-04-27 Pye Ltd Focus coil suspension for cathoderay tubes
US2648036A (en) * 1946-03-12 1953-08-04 Us Navy Adjustable focusing coil
US2501516A (en) * 1947-12-31 1950-03-21 Gen Electric Deflecting and focusing device for cathode-ray apparatus
US2591820A (en) * 1948-02-07 1952-04-08 Pye Ltd Suspension mounting for the focussing device of cathode-ray tubes
US2521061A (en) * 1948-03-18 1950-09-05 Motorola Inc Combined focus and centering control for cathode ray tubes
US2569327A (en) * 1948-08-31 1951-09-25 Rca Corp Electron beam bender
US2606301A (en) * 1949-02-24 1952-08-05 Pye Ltd Magnetic focusing device for cathode-ray tubes
US2533687A (en) * 1949-05-27 1950-12-12 Quam Nichols Company Magnetic focusing device
US2579941A (en) * 1949-07-06 1951-12-25 Ferguson Radio Corp Cathode-ray tube
US2569517A (en) * 1949-09-09 1951-10-02 Du Mont Allen B Lab Inc Magnet for cathode-ray tube ion traps
US2568631A (en) * 1950-01-27 1951-09-18 Admiral Corp Focus coil support and control
US2533688A (en) * 1950-01-31 1950-12-12 Quam Nichols Company Focusing device
US2544875A (en) * 1950-03-02 1951-03-13 Pye Ltd Combination centering, focusing, and deflecting device for beam of cathode-ray tubes
US2594099A (en) * 1950-04-22 1952-04-22 Ite Circuit Breaker Ltd Focusing coil for cathode-ray tubes
US2717324A (en) * 1950-05-04 1955-09-06 Emi Ltd Cathode ray tubes
US2627066A (en) * 1950-05-20 1953-01-27 Rca Corp Positioning structure for cathode-ray tubes
US2533689A (en) * 1950-06-28 1950-12-12 Quam Nichols Company Magnetic focusing device
US2581657A (en) * 1950-07-26 1952-01-08 Myron R Heppner Focusing and centering device for cathode-ray tubes
US2608665A (en) * 1950-07-29 1952-08-26 Gen Electric Permanent magnet focusing device
US2568668A (en) * 1950-08-18 1951-09-18 Best Mfg Co Inc Cathode-ray tube focusing device of the permanent magnet type
US2592185A (en) * 1950-12-09 1952-04-08 Quam Nichols Company Focusing device
US2580606A (en) * 1951-03-21 1952-01-01 Best Mfg Company Inc Cathode-ray tube focusing device
US2677784A (en) * 1952-09-04 1954-05-04 Edwin I Guthman & Co Inc Electrical apparatus
US2828434A (en) * 1952-10-25 1958-03-25 Int Standard Electric Corp Electron beam focussing device
US2761989A (en) * 1955-02-28 1956-09-04 Rca Corp Cathode ray tube device
US2889477A (en) * 1955-06-16 1959-06-02 Sylvania Electric Prod Clamp and mounting arrangement
US2922909A (en) * 1955-08-31 1960-01-26 Westinghouse Electric Corp Beam centering apparatus
US2922908A (en) * 1955-08-31 1960-01-26 Westinghouse Electric Corp Retaining device
US3321577A (en) * 1963-07-05 1967-05-23 Conduction Corp Adjustable mount for a cathode ray tube
US4283743A (en) * 1980-04-14 1981-08-11 Motorola, Inc. Yoke mounting assembly for a video camera

Also Published As

Publication number Publication date
FR867556A (fr) 1941-11-14

Similar Documents

Publication Publication Date Title
US2234720A (en) Electron discharge apparatus
US2513929A (en) Beam centering device for cathode-ray tubes
US2533688A (en) Focusing device
US2431077A (en) Cathode-ray tube with revolving magnets and adjustable sleeve
US2442975A (en) Focusing system
US2336837A (en) Electrical apparatus
US3777211A (en) Adjusting device for a particle beam
US2455171A (en) System for magnetic deflection in cathode-ray tubes
US2501516A (en) Deflecting and focusing device for cathode-ray apparatus
US3020434A (en) Self shielding electron gun and cathode ray tube system including same
US2802111A (en) Electron microscope alignment device
US2845562A (en) Electromagnetic deflection yoke
US2766393A (en) Color television receiver
US3629578A (en) Magnetic deflection system for electron analysis devices
US2791709A (en) Convergence unit for picture receiving tubes
US2568456A (en) Electromagnetic deflection yoke structure
US3048654A (en) Television projection tube alignment
US2729759A (en) Beam controlling apparatus
US2634381A (en) Cathode-ray tube beam-positioning device
US2880340A (en) Color television receiver
US2806164A (en) Beam convergence apparatus for tri-color kinescopes
US2717324A (en) Cathode ray tubes
US2330628A (en) Magnetic lenses for electronoptical apparatus
US2880339A (en) Device for cathode ray tube
US2859365A (en) Electron beam controlling apparatus