GB438255A - Improvements in arrangements for resonance indication in superheterodyne receiving sets - Google Patents

Improvements in arrangements for resonance indication in superheterodyne receiving sets

Info

Publication number
GB438255A
GB438255A GB12222/35A GB1222235A GB438255A GB 438255 A GB438255 A GB 438255A GB 12222/35 A GB12222/35 A GB 12222/35A GB 1222235 A GB1222235 A GB 1222235A GB 438255 A GB438255 A GB 438255A
Authority
GB
United Kingdom
Prior art keywords
arrangements
resonance
lamp
circuit
valve
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
GB12222/35A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB438255A publication Critical patent/GB438255A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/12—Electrically-operated arrangements for indicating correct tuning
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/12—Electrically-operated arrangements for indicating correct tuning
    • H03J3/14—Visual indication, e.g. magic eye

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Amplifiers (AREA)

Abstract

438,255. Wireless receiving-apparatus. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. April 23, 1935, No. 12222. Convention date, July 2, 1934. [Class 40 (v)] In a supersonic heterodyne receiver resonance with the incoming signal is indicated by the use of one or more lightly damped resonance circuits coupled to the intermediate frequency amplifier and connected to a valve in the direct current circuit of which a lamp or the like is provided. The Figure shows an arrangement in which the detector D gives automatic volume control and a valve V is fed from the intermediate frequency transformer II through a coupling coil L. In the anode circuit a lightly damped circuit S is provided associated with a rectifier AG and lamp R1.
GB12222/35A 1934-07-02 1935-04-23 Improvements in arrangements for resonance indication in superheterodyne receiving sets Expired GB438255A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL438255X 1934-07-02
DE2153783X 1934-07-02

Publications (1)

Publication Number Publication Date
GB438255A true GB438255A (en) 1935-11-13

Family

ID=32070909

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12222/35A Expired GB438255A (en) 1934-07-02 1935-04-23 Improvements in arrangements for resonance indication in superheterodyne receiving sets

Country Status (4)

Country Link
US (1) US2153783A (en)
BE (1) BE410180A (en)
FR (1) FR791951A (en)
GB (1) GB438255A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365669A (en) * 1962-12-22 1968-01-23 Hitachi Ltd Lamp tuning indicator for transistor radio

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2773119A (en) * 1950-04-04 1956-12-04 Louis W Parker Tuning system for radio and television receivers
US2741146A (en) * 1954-08-30 1956-04-10 Clarence L Fender Tremolo device for stringed instruments
US3099827A (en) * 1958-04-14 1963-07-30 Mc Graw Edison Co Transistor indicator circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365669A (en) * 1962-12-22 1968-01-23 Hitachi Ltd Lamp tuning indicator for transistor radio

Also Published As

Publication number Publication date
BE410180A (en) 1935-08-31
FR791951A (en) 1935-12-20
US2153783A (en) 1939-04-11

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