GB542395A - Improvements in the tuning arrangements of radio receivers - Google Patents

Improvements in the tuning arrangements of radio receivers

Info

Publication number
GB542395A
GB542395A GB1300140A GB1300140A GB542395A GB 542395 A GB542395 A GB 542395A GB 1300140 A GB1300140 A GB 1300140A GB 1300140 A GB1300140 A GB 1300140A GB 542395 A GB542395 A GB 542395A
Authority
GB
United Kingdom
Prior art keywords
coil
radio receivers
screw
spring blade
capacities
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
GB1300140A
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.)
Mullard Radio Valve Co Ltd
Original Assignee
Mullard Radio Valve 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 Mullard Radio Valve Co Ltd filed Critical Mullard Radio Valve Co Ltd
Priority to GB1300140A priority Critical patent/GB542395A/en
Publication of GB542395A publication Critical patent/GB542395A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F21/00—Variable inductances or transformers of the signal type
    • H01F21/005—Inductances without magnetic core

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Toys (AREA)
  • Circuits Of Receivers In General (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

542,395. Inductances. MULLARD RADIO VALVE CO., Ltd., and EAGLESFIELD, C. C. Aug. 14, 1940, No. 13001. [Class 38 (ii)] A variable inductance for tuning short-wave radio receivers comprises a spiral or helical coil 7 one end of which is attached to a support 3 while the other end is secured to a spring blade 2 which extends the coil to an extent determined by adjustment of a screw 8. Insulation 5 is inserted between the end of the screw and a cup 4 on the spring blade. The coil may be used without a condenser to form an oscillatory circuit, the necessary capacity being provided by the coil itself together with the associated valve capacities and stray capacities.
GB1300140A 1940-08-14 1940-08-14 Improvements in the tuning arrangements of radio receivers Expired GB542395A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1300140A GB542395A (en) 1940-08-14 1940-08-14 Improvements in the tuning arrangements of radio receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1300140A GB542395A (en) 1940-08-14 1940-08-14 Improvements in the tuning arrangements of radio receivers

Publications (1)

Publication Number Publication Date
GB542395A true GB542395A (en) 1942-01-07

Family

ID=10015016

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1300140A Expired GB542395A (en) 1940-08-14 1940-08-14 Improvements in the tuning arrangements of radio receivers

Country Status (1)

Country Link
GB (1) GB542395A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2459493A (en) * 1945-09-26 1949-01-18 Bendix Aviat Corp Tuning means comprising variable condenser and adjustable inductor of the mechanicaly deformable type
US2563413A (en) * 1951-08-07 Electromechanical device
US2588304A (en) * 1946-05-11 1952-03-04 Sunbeam Corp High-frequency induction heating apparatus
US2666129A (en) * 1948-03-05 1954-01-12 Nat Cylinder Gas Co System for controlling oscillator grid current
US2952771A (en) * 1952-07-02 1960-09-13 Lytle Corp Tuners for radio and television receivers, and the like

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563413A (en) * 1951-08-07 Electromechanical device
US2459493A (en) * 1945-09-26 1949-01-18 Bendix Aviat Corp Tuning means comprising variable condenser and adjustable inductor of the mechanicaly deformable type
US2588304A (en) * 1946-05-11 1952-03-04 Sunbeam Corp High-frequency induction heating apparatus
US2666129A (en) * 1948-03-05 1954-01-12 Nat Cylinder Gas Co System for controlling oscillator grid current
US2952771A (en) * 1952-07-02 1960-09-13 Lytle Corp Tuners for radio and television receivers, and the like

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