GB479880A - High frequency inductance coil with adjustable inductance value - Google Patents

High frequency inductance coil with adjustable inductance value

Info

Publication number
GB479880A
GB479880A GB2245836A GB2245836A GB479880A GB 479880 A GB479880 A GB 479880A GB 2245836 A GB2245836 A GB 2245836A GB 2245836 A GB2245836 A GB 2245836A GB 479880 A GB479880 A GB 479880A
Authority
GB
United Kingdom
Prior art keywords
core
inductance
adjustable
high frequency
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
GB2245836A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2245836A priority Critical patent/GB479880A/en
Publication of GB479880A publication Critical patent/GB479880A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/043—Fixed inductances of the signal type  with magnetic core with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

479,880. Inductances. STANDARD TELEPHONES & CABLES, Ltd., JOHNSTON, T., and HALLETT, L. W. Aug. 14, 1936, No. 22458. [Class 38 (ii)] An iron-clad inductance formed by a coil mounted on a former 2 and enclosed by a shell of powered insulated magnetic material 3 has its inductance varied by means of an adjustable core 4. As shown the inductance is mounted in an insulating casing 8 with an extension 10 to accommodate the core and adjusting screw 9. In a modification the core 4 may be hollow with a stationary core 7 mounted within it. In a further modification, the core 7 may be adjustable to give finer adjustment. Specification 180,642, [Class 38 (ii)], is referred to.
GB2245836A 1936-08-14 1936-08-14 High frequency inductance coil with adjustable inductance value Expired GB479880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2245836A GB479880A (en) 1936-08-14 1936-08-14 High frequency inductance coil with adjustable inductance value

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2245836A GB479880A (en) 1936-08-14 1936-08-14 High frequency inductance coil with adjustable inductance value

Publications (1)

Publication Number Publication Date
GB479880A true GB479880A (en) 1938-02-14

Family

ID=10179681

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2245836A Expired GB479880A (en) 1936-08-14 1936-08-14 High frequency inductance coil with adjustable inductance value

Country Status (1)

Country Link
GB (1) GB479880A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741117C (en) * 1939-04-16 1943-11-04 Siemens Ag Device for balancing the characteristic of an inductance which can be changed by an electromagnetic constant field excitation system and has a ferromagnetic, in particular high-frequency iron core
US2489595A (en) * 1942-04-04 1949-11-29 Hartford Nat Bank & Trust Co Slide core tuning device
US2544152A (en) * 1943-10-27 1951-03-06 Hartford Nat Bank & Trust Co High-frequency coil system
US2603774A (en) * 1947-05-30 1952-07-15 Hartford Nat Bank & Trust Co High-frequency coil
US2626318A (en) * 1947-10-04 1953-01-20 Rca Corp Radio-frequency transformer and inductance element therefor
US2722664A (en) * 1951-12-18 1955-11-01 Bell Telephone Labor Inc Adjustable inductance device
DE944323C (en) * 1952-10-25 1956-06-14 Philips Nv Coil system with slide core coil
US2946029A (en) * 1955-12-22 1960-07-19 Cambridge Thermionic Corp Impedance assembly
US3471815A (en) * 1968-01-04 1969-10-07 Bell Telephone Labor Inc Temperature compensating inductor and circuit
US4034325A (en) * 1976-02-26 1977-07-05 Motorola, Inc. Coarse and fine adjustment warp coil

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741117C (en) * 1939-04-16 1943-11-04 Siemens Ag Device for balancing the characteristic of an inductance which can be changed by an electromagnetic constant field excitation system and has a ferromagnetic, in particular high-frequency iron core
US2489595A (en) * 1942-04-04 1949-11-29 Hartford Nat Bank & Trust Co Slide core tuning device
US2544152A (en) * 1943-10-27 1951-03-06 Hartford Nat Bank & Trust Co High-frequency coil system
US2603774A (en) * 1947-05-30 1952-07-15 Hartford Nat Bank & Trust Co High-frequency coil
US2626318A (en) * 1947-10-04 1953-01-20 Rca Corp Radio-frequency transformer and inductance element therefor
US2722664A (en) * 1951-12-18 1955-11-01 Bell Telephone Labor Inc Adjustable inductance device
DE944323C (en) * 1952-10-25 1956-06-14 Philips Nv Coil system with slide core coil
US2946029A (en) * 1955-12-22 1960-07-19 Cambridge Thermionic Corp Impedance assembly
US3471815A (en) * 1968-01-04 1969-10-07 Bell Telephone Labor Inc Temperature compensating inductor and circuit
US4034325A (en) * 1976-02-26 1977-07-05 Motorola, Inc. Coarse and fine adjustment warp coil

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