GB382076A - Improvements in electrical circuit-tuning devices - Google Patents

Improvements in electrical circuit-tuning devices

Info

Publication number
GB382076A
GB382076A GB3022631A GB3022631A GB382076A GB 382076 A GB382076 A GB 382076A GB 3022631 A GB3022631 A GB 3022631A GB 3022631 A GB3022631 A GB 3022631A GB 382076 A GB382076 A GB 382076A
Authority
GB
United Kingdom
Prior art keywords
magnetic core
electrical circuit
long
tuning devices
coil
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
GB3022631A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3022631A priority Critical patent/GB382076A/en
Publication of GB382076A publication Critical patent/GB382076A/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
    • H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
    • H01F21/06—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by movement of core or part of core relative to the windings as a whole

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

382,076. Inductances. DOWDING, G. V., 215, Hainault Road, London. Oct. 31, 1931., No. 30226. [Class 37.] A tuning inductance comprises a relatively movable coil and magnetic core, the movable member being coupled to a switch which is operated at one or more predetermined points. Long and short wave coils A, B are mounted on a former 1 inside which a magnetic core 5 provided with a flat base is moved by an insulating rod 2. The rod 2 drives reduction gear 7, 8 which carries a cam 9 operating switch blades 11 to open the normally shortcircuited long wave coil A.
GB3022631A 1931-10-31 1931-10-31 Improvements in electrical circuit-tuning devices Expired GB382076A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3022631A GB382076A (en) 1931-10-31 1931-10-31 Improvements in electrical circuit-tuning devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3022631A GB382076A (en) 1931-10-31 1931-10-31 Improvements in electrical circuit-tuning devices

Publications (1)

Publication Number Publication Date
GB382076A true GB382076A (en) 1932-10-20

Family

ID=10304277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3022631A Expired GB382076A (en) 1931-10-31 1931-10-31 Improvements in electrical circuit-tuning devices

Country Status (1)

Country Link
GB (1) GB382076A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2534768A (en) * 1948-10-08 1950-12-19 Belmont Radio Corp Television tuner
US2555520A (en) * 1948-06-01 1951-06-05 Rca Corp Core mounting for permeability tuners
DE752881C (en) * 1937-03-18 1951-08-16 Bosch Gmbh Robert High frequency coil with iron core
DE759378C (en) * 1938-07-28 1954-02-22 Siemens & Halske A G Variometer
US2796519A (en) * 1956-01-30 1957-06-18 Rca Corp Tuning device
US3195080A (en) * 1962-11-02 1965-07-13 Plessey Co Ltd Radio and television tuners

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE752881C (en) * 1937-03-18 1951-08-16 Bosch Gmbh Robert High frequency coil with iron core
DE759378C (en) * 1938-07-28 1954-02-22 Siemens & Halske A G Variometer
US2555520A (en) * 1948-06-01 1951-06-05 Rca Corp Core mounting for permeability tuners
US2534768A (en) * 1948-10-08 1950-12-19 Belmont Radio Corp Television tuner
US2796519A (en) * 1956-01-30 1957-06-18 Rca Corp Tuning device
US3195080A (en) * 1962-11-02 1965-07-13 Plessey Co Ltd Radio and television tuners

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