GB487241A - Cathode ray tubes for intensity-controlled illumination - Google Patents

Cathode ray tubes for intensity-controlled illumination

Info

Publication number
GB487241A
GB487241A GB34578/36A GB3457836A GB487241A GB 487241 A GB487241 A GB 487241A GB 34578/36 A GB34578/36 A GB 34578/36A GB 3457836 A GB3457836 A GB 3457836A GB 487241 A GB487241 A GB 487241A
Authority
GB
United Kingdom
Prior art keywords
cathode
ray
reflector
screen
tube
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
GB34578/36A
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta 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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of GB487241A publication Critical patent/GB487241A/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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
    • H01J29/894—Arrangements combined with the vessel for the purpose of image projection on a screen

Abstract

487,241. Cathode-ray tubes. RADIOAKT.-GES. D. S. LOEWE. Dec. 16, 1936, No. 34578. Convention date, Dec. 17, 1935. [Class 39 (i)] In a cathode-ray tube for use in a television system wherein the large emissive surface of a cathode 2 is focused on to a fluorescent screen 8 to give an optical image, the whole of the light is projected back from the screen to a reflector 7 within the tube 1, the reflector projecting- preferably by parallel rays-the light out of the tube to a suitable mirror or lens 9. The reflector may be spherical or parabolic in shape and the orifice therein for the passage of the cathode ray is made as small as possible without interfering with the ray. The screen 8 may be at the same potential as an accelerating anode 6 or at a higher potential than this anode. The reflector may produce a concentrating field for the ray. Arrangements such as described in Specifications 420,667 and 457,846 may be used to focus the cathode surface on the screen. Specification 452,148 also is referred to.
GB34578/36A 1935-12-17 1936-12-16 Cathode ray tubes for intensity-controlled illumination Expired GB487241A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE487241X 1935-12-17

Publications (1)

Publication Number Publication Date
GB487241A true GB487241A (en) 1938-06-16

Family

ID=6543577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34578/36A Expired GB487241A (en) 1935-12-17 1936-12-16 Cathode ray tubes for intensity-controlled illumination

Country Status (2)

Country Link
FR (1) FR815094A (en)
GB (1) GB487241A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440735A (en) * 1943-06-05 1948-05-04 Farnsworth Res Corp Electrooptical device
US2448476A (en) * 1943-12-03 1948-08-31 Rauland Corp Cathode-ray projector tube
US2453003A (en) * 1946-03-07 1948-11-02 Pye Ltd Television projection tube
US2466329A (en) * 1946-08-02 1949-04-05 Cinema Television Ltd Partitioned projection cathode-ray tube
US2473320A (en) * 1946-03-07 1949-06-14 Cossor Ltd A C Cathode-ray tube
US2482151A (en) * 1944-08-18 1949-09-20 Philips Lab Inc Cathode-ray projection tube
US2491072A (en) * 1945-06-19 1949-12-13 Perkin Elmer Corp Schmidt television projector with spherical aberration corrector
US2495035A (en) * 1942-05-13 1950-01-17 Rauland Corp Schmidt projector having cathoderay tube comprising spherical mirror
US2520190A (en) * 1946-10-24 1950-08-29 Philips Lab Inc Cathode-ray tube

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746543C (en) * 1937-07-27 1944-08-08 Fernseh Gmbh TV projection device with cathode ray tube
DE743864C (en) * 1937-10-22 1944-01-04 Telefunken Gmbh Electron beam tube
US2459637A (en) * 1944-11-29 1949-01-18 Motorola Inc Cathode-ray image-translating device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495035A (en) * 1942-05-13 1950-01-17 Rauland Corp Schmidt projector having cathoderay tube comprising spherical mirror
US2440735A (en) * 1943-06-05 1948-05-04 Farnsworth Res Corp Electrooptical device
US2448476A (en) * 1943-12-03 1948-08-31 Rauland Corp Cathode-ray projector tube
US2482151A (en) * 1944-08-18 1949-09-20 Philips Lab Inc Cathode-ray projection tube
US2491072A (en) * 1945-06-19 1949-12-13 Perkin Elmer Corp Schmidt television projector with spherical aberration corrector
US2453003A (en) * 1946-03-07 1948-11-02 Pye Ltd Television projection tube
US2473320A (en) * 1946-03-07 1949-06-14 Cossor Ltd A C Cathode-ray tube
US2466329A (en) * 1946-08-02 1949-04-05 Cinema Television Ltd Partitioned projection cathode-ray tube
US2520190A (en) * 1946-10-24 1950-08-29 Philips Lab Inc Cathode-ray tube

Also Published As

Publication number Publication date
FR815094A (en) 1937-07-05

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