GB450351A - Grid-current detector for television purposes - Google Patents

Grid-current detector for television purposes

Info

Publication number
GB450351A
GB450351A GB11261/36A GB1126136A GB450351A GB 450351 A GB450351 A GB 450351A GB 11261/36 A GB11261/36 A GB 11261/36A GB 1126136 A GB1126136 A GB 1126136A GB 450351 A GB450351 A GB 450351A
Authority
GB
United Kingdom
Prior art keywords
grids
grid
insulating coating
valve
nov
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
GB11261/36A
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.)
RADIOAKTIENGESELHSCHAFT D S LO
Original Assignee
RADIOAKTIENGESELHSCHAFT D S LO
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
Priority claimed from US751927A external-priority patent/US2072315A/en
Application filed by RADIOAKTIENGESELHSCHAFT D S LO filed Critical RADIOAKTIENGESELHSCHAFT D S LO
Publication of GB450351A publication Critical patent/GB450351A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/14—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles
    • H03D1/16—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles of discharge tubes

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Testing Relating To Insulation (AREA)
  • Measurement Of Radiation (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

450,351. Thermionic valves ; circuits for wireless reception. RADIOAKT.-GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. Nov. 10, 1934, No. 11261/36. Convention date, Nov. 10, 1933. Divided out of 450,241. [Classes 39 (i) and 40 (v)] A grid-current detector particularly for use in television, comprises a valve having control electrodes insulated completely or incompletely from the inner electronic discharge space and furnished with a conductive layer arranged in the insulating coating. The Figure shows a push-pull detector valve having a of grids 20, 21 which are insulated from the electronic discharge space and provided with a conductive layer 24 on the insulating coating. The grids co-operate with a common cathode and are of similar construction and have the same amplification factor. The leak resistance 25 may be provided inside or outside the valve envelope and in the former case may be provided by making the insulating coating slightly conductive. With these arrangements, the mid-point of the input circuit can be directly earthed to give symmetry and thus remove the carrier frequency from the output circuit. The direct connection of the grids to the input circuit avoids the loss in the coupling condensers and with the reduced input capacity a larger value of grid leak may be employed. Specifications 435,417, 447,401, 449,466, and 450,241 are referred to.
GB11261/36A 1933-11-10 1934-11-10 Grid-current detector for television purposes Expired GB450351A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE450241X 1933-11-10
US751927A US2072315A (en) 1933-11-10 1934-11-07 Push-pull detector
US83704A US2129037A (en) 1933-11-10 1936-06-05 Detector

Publications (1)

Publication Number Publication Date
GB450351A true GB450351A (en) 1936-07-10

Family

ID=32045522

Family Applications (2)

Application Number Title Priority Date Filing Date
GB32403/34A Expired GB450241A (en) 1933-11-10 1934-11-10 Push-pull detector for television purposes
GB11261/36A Expired GB450351A (en) 1933-11-10 1934-11-10 Grid-current detector for television purposes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB32403/34A Expired GB450241A (en) 1933-11-10 1934-11-10 Push-pull detector for television purposes

Country Status (3)

Country Link
US (1) US2129037A (en)
GB (2) GB450241A (en)
NL (1) NL43274C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462153A (en) * 1945-05-28 1949-02-22 Hilmar A Andresen Electron discharge device
US3418882A (en) * 1966-09-02 1968-12-31 Max K. Brand Key making machine for tubular-type key

Also Published As

Publication number Publication date
US2129037A (en) 1938-09-06
NL43274C (en)
GB450241A (en) 1936-07-10

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