GB478666A - Improvements in or relating to magnetic focussing coils for electron discharge tubes - Google Patents

Improvements in or relating to magnetic focussing coils for electron discharge tubes

Info

Publication number
GB478666A
GB478666A GB20375/36A GB2037536A GB478666A GB 478666 A GB478666 A GB 478666A GB 20375/36 A GB20375/36 A GB 20375/36A GB 2037536 A GB2037536 A GB 2037536A GB 478666 A GB478666 A GB 478666A
Authority
GB
United Kingdom
Prior art keywords
coil
july
uniform
relating
former
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
Application number
GB20375/36A
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.)
Robert Bosch Fernsehanlagen GmbH
Original Assignee
Fernseh GmbH
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 Fernseh GmbH filed Critical Fernseh GmbH
Publication of GB478666A publication Critical patent/GB478666A/en
Expired legal-status Critical Current

Links

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
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/64—Magnetic lenses
    • H01J29/66—Magnetic lenses using electromagnetic means only

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Details Of Television Scanning (AREA)

Abstract

478,666. Cathode-ray tubes. FERNSEH AKT.-GES. July 23, 1936, No. 20375. Convention date, July 23, 1935. Drawings to Specification. [Class 39 (i)] A coil for focusing a natural-sized electron image of a large surface cathode extends over the whole length of the beam and is so constructed that the current density increases towards one or both ends of the coil. A field homogeneous along the length of the beam may be thus produced. The coil may be wound upon a cylindrical former, the thickness of which decreases in steps towards the ends, or the former may be uniform and the coil thickness increased in steps or uniformly, or additional coils may be wound onto the ends of a uniform solenoid. The different portions of the coil may carry different currents, or auxiliary currents, e.g. a current depending upon or of equal frequency with the electrostatic or electromagnetic deflecting field and superposed on a steady current. The invention is applicable to image dissectors and other television apparatus.
GB20375/36A 1935-07-23 1936-07-23 Improvements in or relating to magnetic focussing coils for electron discharge tubes Expired GB478666A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE478666X 1935-07-23

Publications (1)

Publication Number Publication Date
GB478666A true GB478666A (en) 1938-01-24

Family

ID=6542285

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20375/36A Expired GB478666A (en) 1935-07-23 1936-07-23 Improvements in or relating to magnetic focussing coils for electron discharge tubes

Country Status (3)

Country Link
US (1) US2159534A (en)
FR (1) FR808641A (en)
GB (1) GB478666A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB507583A (en) * 1937-12-16 1939-06-16 Baird Television Ltd Improvements in or relating to electron discharge device arrangements
US2462884A (en) * 1945-07-16 1949-03-01 Standard Telephones Cables Ltd Electrical choke
US2617954A (en) * 1950-12-27 1952-11-11 Rca Corp Pickup tube
NL93297C (en) * 1951-12-29
US2681421A (en) * 1952-03-04 1954-06-15 Gen Electric Magnetic focusing structure for electron beams
US2880338A (en) * 1953-10-17 1959-03-31 Pye Ltd Television pick-up tube
NL200487A (en) * 1954-09-21
US2817038A (en) * 1954-10-15 1957-12-17 Jr John S Hickey Permanent magnet for beam tubes
US3023342A (en) * 1958-07-18 1962-02-27 Gen Atronics Corp Beam modulating devices and method
US2999959A (en) * 1960-04-04 1961-09-12 Bell Telephone Labor Inc Traveling wave tube
FI373874A (en) * 1974-12-20 1976-06-21 Nils Allan Danielsson
DE3923456A1 (en) * 1989-07-15 1991-01-24 Bruker Analytische Messtechnik SUPRAL-CONDUCTING HOMOGENEOUS HIGH-FIELD MAGNETIC COIL
JPH0996666A (en) * 1995-09-29 1997-04-08 Sony Corp Magnetic sensor
WO1998019319A1 (en) * 1996-10-31 1998-05-07 Mcqueen Clarence W Magnetic tube and inductive devices
US6278355B1 (en) * 1999-08-23 2001-08-21 Square D Company Transformer winding
FR2870350B1 (en) * 2004-05-13 2006-07-14 Schneider Electric Ind Sas DEVICE FOR MEASURING AN ELECTRICAL CURRENT, CURRENT SENSOR, ELECTRICAL SENSOR AND CUTTING DEVICE COMPRISING SUCH A MEASURING DEVICE
US8330566B2 (en) * 2009-02-02 2012-12-11 Northrop Grumman Guidance And Electronics Company, Inc. Magnetic solenoid for generating a substantially uniform magnetic field
DE102011005165B4 (en) * 2011-03-07 2015-03-26 Vacuumschmelze Gmbh & Co. Kg Coil with a winding having a diameter reduction, current sensor with such a coil and method for producing such a coil and such a current sensor

Also Published As

Publication number Publication date
FR808641A (en) 1937-02-11
US2159534A (en) 1939-05-23

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