GB701894A - Improvements in or relating to high frequency variable inductances - Google Patents

Improvements in or relating to high frequency variable inductances

Info

Publication number
GB701894A
GB701894A GB20799/52A GB2079952A GB701894A GB 701894 A GB701894 A GB 701894A GB 20799/52 A GB20799/52 A GB 20799/52A GB 2079952 A GB2079952 A GB 2079952A GB 701894 A GB701894 A GB 701894A
Authority
GB
United Kingdom
Prior art keywords
coil
section
sections
conductor
rotation
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
GB20799/52A
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.)
National Research Council of Canada
Original Assignee
National Research Council of Canada
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 National Research Council of Canada filed Critical National Research Council of Canada
Publication of GB701894A publication Critical patent/GB701894A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/03—Constructional details, e.g. casings, housings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements

Abstract

701,894. Inductances. NATIONAL RESEARCH COUNCIL. Aug. 19, 1952 [April 25, 1952], No. 20799/52. Class 38 (2) A variable inductance comprises a helically wound coil having two sections 10, 11 of conductor with the same winding pitch and diameter and arranged on a common axis, at least a part of one of the two sections being telescopically arranged with at least a part of the other section the two sections being arranged for relative rotation to vary the effective electrical length of the coil. Section 10 of the coil is in the form of a hollow copper tubing haying a split collet 14 at one end to form contact with, and a guide for, the other section 11 of the coil, this section being formed of a solid circular conductor. One end 21 of this latter conductor is bent so as to lie along the common axis of the coil to project into a terminal sleeve 22 through another split collet 23. Rotation of the upper section 11 of the coil is effected by means of a knob 29 and a split insulating shaft 28, such that upon rotation the ends of the section move into, or out of, the collets 14, 23. When the inductance value has been achieved grub screws 18 are tightened down to lock the ends. The-sections.of the conductor may be of any suitable shape and may each be solid and arranged to slide past each other.
GB20799/52A 1952-04-25 1952-08-19 Improvements in or relating to high frequency variable inductances Expired GB701894A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US701894XA 1952-04-25 1952-04-25

Publications (1)

Publication Number Publication Date
GB701894A true GB701894A (en) 1954-01-06

Family

ID=22093706

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20799/52A Expired GB701894A (en) 1952-04-25 1952-08-19 Improvements in or relating to high frequency variable inductances

Country Status (3)

Country Link
US (1) US2735076A (en)
GB (1) GB701894A (en)
NL (1) NL177831B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137759A (en) * 1983-04-08 1984-10-10 Varian Associates Rf probe for gyromagnetic spectrometer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281748A (en) * 1964-09-11 1966-10-25 Hazeltine Research Inc Variable inductor
US3402923A (en) * 1967-02-03 1968-09-24 Lincoln Mfg Company Inc Device for inactivating a selected portion of a coil spring

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1629867A (en) * 1925-03-26 1927-05-24 Straitline Radio Corp Electrical condenser
US1642350A (en) * 1926-02-06 1927-09-13 Adams Leonard Telescoping radio loop or antenna
US1904208A (en) * 1930-11-14 1933-04-18 Jennings B Dow Variable inductance system
US2451809A (en) * 1945-12-10 1948-10-19 James L Clark Variable inductance device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137759A (en) * 1983-04-08 1984-10-10 Varian Associates Rf probe for gyromagnetic spectrometer
US4517516A (en) * 1983-04-08 1985-05-14 Varian Associates, Inc. NMR Probe coil form structure

Also Published As

Publication number Publication date
US2735076A (en) 1956-02-14
NL177831B (en)

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