US1932084A - Cathode ray oscillograph - Google Patents

Cathode ray oscillograph Download PDF

Info

Publication number
US1932084A
US1932084A US385840A US38584029A US1932084A US 1932084 A US1932084 A US 1932084A US 385840 A US385840 A US 385840A US 38584029 A US38584029 A US 38584029A US 1932084 A US1932084 A US 1932084A
Authority
US
United States
Prior art keywords
plates
electron beam
electrons
plate
deflecting
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
US385840A
Other languages
English (en)
Inventor
Alert M Opsahl
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric 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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US385840A priority Critical patent/US1932084A/en
Priority to FR700175D priority patent/FR700175A/fr
Priority to DE1930557823D priority patent/DE557823C/de
Priority to GB24399/30A priority patent/GB356904A/en
Application granted granted Critical
Publication of US1932084A publication Critical patent/US1932084A/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
    • 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
    • H01J31/121—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen tubes for oscillography

Definitions

  • My invention relates to cathode-ray oscillographs and particularly to cathode-ray oscillographs which comprise a combination of shields and deflecting plates for preventing the cathode ray or electron beam from reaching a photographic plate or film until the beam is so defiected as to pass by the shields.
  • An object of my invention is to so design an oscillograph of the above mentioned type that it may be connected'to a transmission line for a long period, while in operative condition, without the photographic surface becoming fogged.
  • an object of my invention is to reduce the tendency of the photographic surface to become tagged, in apparatus of the above mentioned type, by removing the more slowlymoving electrons-from the electron beam.
  • a further object of my invention is to provide an electron beam from which the slower-moving electrons have been removed whereby the beam may be focused to a sharper point on the fluorescent screen or photographic plate.
  • I provide an evacuated elongated casing which consists of two sections and which'ha's means, at one end thereof, for generating an electron beam and for projecting said beam longitudinally of the casing.
  • a sensitized recording surface may be provided at the other end of the casing for intercepting the electron beam.
  • Shields and deflecting plates are positioned in the lower section of the casing for preventing the electron beam from being impressed upon the fluorescent screen or photographic surface until the phenomenon to be recorded occurs, and for plates and a baffle are positioned to separate the then deflecting the beam in accordance with the character of the phenomenon.
  • Fig. 2 is a view, in longitudinal section, taken on the line II-II of Fig. 1;
  • Fig. 3 is a diagram of the electrical connections of an oscillograph constructed in accordance with my invention.
  • the apparatus comprises a metal envelope or tube 1, the lower end of which is enlarged to provide a chamber 2 for a photographic plate or film 3.
  • the lower-end of the chamber 2 is closed by means of a plate 4 which is secured, by means of bolts 5, to a flange 6 extending from the tube 1.
  • the joint between the plate 4 and the flange 6 is maintained gas-tight by means of a rubber gasket 7.
  • the upper section of the evacuated casing comprises a metallic envelope or tube 8 which is secured to the lower section 1 by means of a conical joint.
  • the upper end of the tube 8 is closed by means of a plug 9 having a tube 10 of insulating material, such as glass, secured thereto and projecting axially from the tube 8.
  • the upper end of the tube 10 is provided with a cap 11 centrally apertured to permit the passage therethrough of the terminal of a cathode 12.
  • the cathode terminal is enlarged as at 13, to completely close the aperture in the cap 11.
  • a suitable sealing compound may be employed to secure the several elements together.
  • a cold cathode is employed but, obviously, a hot cathode may be employed, if desired.
  • An anode 14 is secured to the lower end of the glass tube 10 and is provided with an axial aperture so thata portion of the electrons projected from the cathode 12 to the anode 14 will pass therethrough.
  • the anode i4 is provided, it neceasary, with suitable water cooling means.
  • a frame which consists of two balrelite strips 15 supported at their respective ends by means of bakelite rings 16, is supported inside the metal tube 1.
  • Metal deflecting plates 17 are supported at the upper end of the frame, each plate being secured to one of the bakelite strips 15.
  • Deflecting plates 18 constituting a second pair are likewise supported by means of the bakelite strips 15 near the middle of the frame.
  • the deflecting plates 17 and 18 are electrically connected to the terminals 19 and 20, respectively, which extend through hollow metal conical plugs 21 and are supported therein and insulated therefrom by means of a suitable insulating material.
  • a target 22 comprising a strip of metal, is positioned between the two pairs of deflecting plates 17 and 18 and on the longitudinal axis of the oscillograph.
  • the metal strip 22 is eccentrically mounted on the conical metal plug 23 which is fitted into the wall of the casing l.
  • the width of the target 22 is approximately equal to the diameter of the aperture in the shield 24.
  • the shield 24 consists of either a bakelite or metal plate which has an aperture in the middle thereof. It is secured to the bakelite strips 15 below the second set of deflecting plates.
  • a concentration coil 25 of the type well known in the art is preferably positioned outside the casing 1 and surrounds the shield 24.
  • Deflecting or timing plates 26 are positioned below the shield 24 in a plane at right angles to the deflecting plates 17 and 18 and are supported by means of brackets 27 secured to the bakelite strips 15.
  • the timing plates 26 are electrically connected to terminals 28 which extend through, and are insulated from, conical bushings 29.
  • Another frame comprising two bakelite strips 30 supported at their respective ends by means of bakelite rings or discs 31, is supported inside the upper metal tube 8.
  • Three pairs of metal deflecting plates are supported on the bakelite strips 30, the pairs of deflecting plates being positioned one below the other.
  • the upper deflecting plates 32 are electrically connected to terminals 33 which extend through, and are insulated from, conical metal bushings or plugs 34.
  • the middle deflecting plates 35 and the lower deflecting plates 36 are similarly connected to terminals 37 and 38, respectively, which extend through the conical bushings 34.
  • a bafile or screen 39 preferably comprising a rectangular metal plate is positioned between the two upper pairs of deflecting plates 32 and 35 and is secured to a bakelite strip 30 by means of a bracket 40.
  • the baiiie '39 is located in a horizontal position at right angles to the deflecting plates and extends to a point intermediate the deflecting plate nearest to it and the longitudinal axis of the tube in order to intercept the more widely deflected electrons.
  • the upper and lower supporting rings or discs 31 of the frame have small apertures in the middle thereof to permit the main electron beam to pass therethrough and, at the same time, to obstruct the passage of stray or scattered electrons.
  • neeacea The electrical connections of-the apparatus are shown in Fig. 3.
  • the negative terminal of a high-potential direct-current source 41 is connected to the cathode 12, and the positive terminal of thesame source is connected to ground.
  • the anode 141s also grounded so that a high potential is maintained between the cathode and the anode to generate the electron beam.
  • the right-hand plate of the. upper pair of plates 32, the left-hand plate of the middle pair of plates 35 and the right-hand plate of the lower pair of plates 36 are connected to the positive terminal of the high-potential battery 42, which terminal is connected to ground.
  • the left-hand plate of the upper pair of plates 32, the right-hand plate of the'middle pairvof plates 35 and the left-hand plate of the lower pair of plates 36 are connected to the negative terminal ofthe battery 42.
  • the bame plate 39 is preferably grounded.
  • the right-hand plate of the upper pair of plates 1'7 and the left-hand plate of the lower pair of plates 18 are connected to ground.
  • the left-hand plate of the upper pair of plates 17 and the right-hand plate of the lower pair of plates 18 are connected to a point on an electrostatic potentiometer 43 which is connected between a transmission line 44 and ground.
  • the potentiometer comprises a plurality of condensers connected in series. target 22 is preferably grounded.
  • One-of the timing plates 26 is connected to ground while the other timing plate is connected to one terminal of an alternating-current source 45, the other terminal of the alternatingcurrent source being connected to ground.
  • the deflecting plates 17 and 18 and the shield 24 are so adjusted with-respect to each other that the electron beam passes through the aperture in the shield 24, irrespective of the angle at which the beam is deflected.
  • the alternating current, which is continuously impressed on the timing plates 26, causes the electron beam to be deflected at right angles to the first deflection to give it a time component.
  • the slowly-moving electrons are intercepted by the baflle plate 39, while the remaining electrons, which constitute the main electron beam indicated by the dotted line 4'7, pass by the edge of the baflie plate and enter the field of the middle deflecting plates 35.
  • the middle deflecting plates deflect the electron beam in a direction opposite to the first deflection.
  • the electrons then enter the electrostatic field or' the lower deflecting plates 36 and are so deflected as to direct the electron beam along the longitudinal axis of the tube.
  • Electrical apparatus comprising a casing, means in said casing for generating a beam or charged particles, an obstruction in the normal path of travel of said particles within said casing, means for bending said beam of charged particles to one side of said obstruction and means including a deflecting device for removing the slower moving particles from said beam before they reach said obstruction.
  • Electrical apparatus comprising a casing, means in said casing for generating a beam of charged particles, an obstruction in the normal path of travel or said particles within said cas--- ing, means for bending said beam of charged 90 particles around said obstruction, means for deflecting said be by a constant field in one direction before the particles reach said obstruction whereby the slower moving particles of said beam are deflected by greater amounts than the remaining particles, and means for obstructing only the paths taken by said slower moving particles when deflected by said constant field.

Landscapes

  • Measurement Of Radiation (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Particle Accelerators (AREA)
  • Microwave Tubes (AREA)
US385840A 1929-08-14 1929-08-14 Cathode ray oscillograph Expired - Lifetime US1932084A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US385840A US1932084A (en) 1929-08-14 1929-08-14 Cathode ray oscillograph
FR700175D FR700175A (fr) 1929-08-14 1930-08-07 Oscillographe à rayons cathodiques
DE1930557823D DE557823C (de) 1929-08-14 1930-08-09 Kathodenstrahlenoszillograph
GB24399/30A GB356904A (en) 1929-08-14 1930-08-14 Improvements relating to cathode beam oscillographs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US385840A US1932084A (en) 1929-08-14 1929-08-14 Cathode ray oscillograph

Publications (1)

Publication Number Publication Date
US1932084A true US1932084A (en) 1933-10-24

Family

ID=23523072

Family Applications (1)

Application Number Title Priority Date Filing Date
US385840A Expired - Lifetime US1932084A (en) 1929-08-14 1929-08-14 Cathode ray oscillograph

Country Status (4)

Country Link
US (1) US1932084A (fr)
DE (1) DE557823C (fr)
FR (1) FR700175A (fr)
GB (1) GB356904A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535317A (en) * 1949-01-26 1950-12-26 Bell Telephone Labor Inc High-speed oscilloscope
US2589130A (en) * 1949-06-24 1952-03-11 Bell Telephone Labor Inc Permutation code group selector
US2617078A (en) * 1948-12-24 1952-11-04 Hartford Nat Bank & Trust Co Electric discharge tube
US2898467A (en) * 1955-05-20 1959-08-04 Vakutronik Veb Electron oscillograph
US2982917A (en) * 1958-04-10 1961-05-02 Aaland Kris Method and apparatus for pulsing a charged particle beam
US3108203A (en) * 1960-12-29 1963-10-22 Bell Telephone Labor Inc Electron beam tube for translating gray code to binary code
US3349270A (en) * 1966-03-04 1967-10-24 Stromberg Carlson Corp Self-aligning electron gun assembly
US3374386A (en) * 1964-11-02 1968-03-19 Field Emission Corp Field emission cathode having tungsten miller indices 100 plane coated with zirconium, hafnium or magnesium on oxygen binder
US4160188A (en) * 1976-04-23 1979-07-03 The United States Of America As Represented By The Secretary Of The Navy Electron beam tube

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2617078A (en) * 1948-12-24 1952-11-04 Hartford Nat Bank & Trust Co Electric discharge tube
US2535317A (en) * 1949-01-26 1950-12-26 Bell Telephone Labor Inc High-speed oscilloscope
US2589130A (en) * 1949-06-24 1952-03-11 Bell Telephone Labor Inc Permutation code group selector
US2898467A (en) * 1955-05-20 1959-08-04 Vakutronik Veb Electron oscillograph
US2982917A (en) * 1958-04-10 1961-05-02 Aaland Kris Method and apparatus for pulsing a charged particle beam
US3108203A (en) * 1960-12-29 1963-10-22 Bell Telephone Labor Inc Electron beam tube for translating gray code to binary code
US3374386A (en) * 1964-11-02 1968-03-19 Field Emission Corp Field emission cathode having tungsten miller indices 100 plane coated with zirconium, hafnium or magnesium on oxygen binder
US3349270A (en) * 1966-03-04 1967-10-24 Stromberg Carlson Corp Self-aligning electron gun assembly
US4160188A (en) * 1976-04-23 1979-07-03 The United States Of America As Represented By The Secretary Of The Navy Electron beam tube

Also Published As

Publication number Publication date
FR700175A (fr) 1931-02-25
DE557823C (de) 1932-08-29
GB356904A (en) 1931-09-17

Similar Documents

Publication Publication Date Title
US2015570A (en) Cathode ray photographic apparatus
US1932084A (en) Cathode ray oscillograph
GB428911A (en) Device and method of controlling high frequency currents
US2829292A (en) Cathode-ray tubes
US2078644A (en) Electric discharge apparatus
US2107520A (en) Electron discharge device
US2545120A (en) Cathode-ray tube arc-over preventive
US2508001A (en) High-voltage cathode-ray tube corona ring
US2336895A (en) Cathode ray tube
US2617061A (en) Ion trap for cathodes
US2427888A (en) Beam type electron discharge device
US2562692A (en) Overvoltage protective device
US1967869A (en) X-ray device
US2658161A (en) Image-reproducing device
US2658160A (en) Image-reproducing device
Kuehni et al. A new high-speed cathode-ray oscillograph
US2338036A (en) Cathode ray device
US2822493A (en) Graphechon storage tube
US1219961A (en) Means for indicating electrical characteristics of alternating currents.
US2161437A (en) Cathode ray deflecting electrode
US1910560A (en) Cathode ray oscillograph
US2176974A (en) Cathode ray tube
GB687261A (en) Improvements relating to electric discharge devices
US2055487A (en) Photoelectric tube
US1768875A (en) Cathode-ray oscillograph