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GB580297A - Improvements in or relating to variable permeability tuning circuits - Google Patents

Improvements in or relating to variable permeability tuning circuits

Info

Publication number
GB580297A
GB580297A GB12244/44A GB1224444A GB580297A GB 580297 A GB580297 A GB 580297A GB 12244/44 A GB12244/44 A GB 12244/44A GB 1224444 A GB1224444 A GB 1224444A GB 580297 A GB580297 A GB 580297A
Authority
GB
United Kingdom
Prior art keywords
inductance
relating
coil
tuning circuits
june
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
GB12244/44A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB580297A publication Critical patent/GB580297A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

580,297. Valve receiving circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. June 28, 1944, No. 12244. Convention date, June 28, 1943. [Class 40 (v)] To improve the tracking in a receiver in which the input and oscillator circuits are tuned by movements of magnetic cores, either of the tuned inductances is partially shunted by an additional inductance L1. Another part of the coil may be shunted by a capacity as described in Specification 546,248, or two shunting inductances may be provided as shown in Figs. 2 and 3. The shunting inductance may be wound on the same former as the tunable inductance either as a distinct coil or between the turns of the main coil.
GB12244/44A 1943-06-28 1944-06-28 Improvements in or relating to variable permeability tuning circuits Expired GB580297A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US492506A US2486986A (en) 1943-06-28 1943-06-28 Permeability tuning system

Publications (1)

Publication Number Publication Date
GB580297A true GB580297A (en) 1946-09-03

Family

ID=23956521

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12244/44A Expired GB580297A (en) 1943-06-28 1944-06-28 Improvements in or relating to variable permeability tuning circuits

Country Status (2)

Country Link
US (1) US2486986A (en)
GB (1) GB580297A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE474392A (en) * 1946-06-22
BE488964A (en) * 1948-05-11
US2687514A (en) * 1948-08-27 1954-08-24 Rca Corp Two-band tuning network
US2697165A (en) * 1949-11-15 1954-12-14 Gen Motors Corp Oscillator coupling system
US2952771A (en) * 1952-07-02 1960-09-13 Lytle Corp Tuners for radio and television receivers, and the like

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE666632C (en) * 1938-10-24 Lorenz Akt Ges C Circuit arrangement for receivers of wireless signals with one-button operation
DE430895C (en) * 1924-11-15 1926-06-28 Telefunken Gmbh Circuit arrangement of two oscillating circuits, the differential frequency of which is to be kept constant with the same change in a tuning means
NL41663C (en) * 1933-01-02
US2034773A (en) * 1933-03-09 1936-03-24 Rca Corp Tunable radio frequency circuits
GB477104A (en) * 1936-09-09 1937-12-22 Ben Bregman Improvements in or relating to sewing machines
US2222387A (en) * 1937-02-16 1940-11-19 Hazeltine Corp High-frequency tunable system and apparatus
NL49884C (en) * 1937-05-17
US2149336A (en) * 1937-09-30 1939-03-07 Bell Telephone Labor Inc Inductive device
US2263613A (en) * 1939-03-31 1941-11-25 Rca Corp Unicontrol variable inductance tuning system
US2190048A (en) * 1939-04-10 1940-02-13 Johnson Lab Inc Permeability-tuned oscillator tracking arrangement
NL58891C (en) * 1940-01-02
US2310323A (en) * 1940-09-30 1943-02-09 James W Sharp Antenna coupling and tuning system for communication or broadcast receivers
US2322722A (en) * 1942-05-29 1943-06-22 Rca Corp Permeability tuning system
US2359684A (en) * 1942-12-30 1944-10-03 Rca Corp Loop input system for radio receivers
US2383286A (en) * 1943-01-28 1945-08-21 Rca Corp Loop input system for radio receivers

Also Published As

Publication number Publication date
US2486986A (en) 1949-11-01

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