GB148679A - Improvements in electrical transformers - Google Patents

Improvements in electrical transformers

Info

Publication number
GB148679A
GB148679A GB1622819A GB1622819A GB148679A GB 148679 A GB148679 A GB 148679A GB 1622819 A GB1622819 A GB 1622819A GB 1622819 A GB1622819 A GB 1622819A GB 148679 A GB148679 A GB 148679A
Authority
GB
United Kingdom
Prior art keywords
windings
bases
primary
transformer
inductance
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
GB1622819A
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 GB1622819A priority Critical patent/GB148679A/en
Publication of GB148679A publication Critical patent/GB148679A/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
    • H01F21/04—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by relative movement of turns or parts of windings

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Particle Accelerators (AREA)

Abstract

148,679. Crowther, H. L. June 27, 1919. Transformers.-The primary and secondary windings 4, 5 of a transformer are wound as twin wires on two bases, the ratio of the inductance of the primary and secondary windings on one base being the same as that of the windings on the other base, and the bases are adjustable relatively to one another in order to vary in equal proportions the selfinduction of the primary and secondary circuits. The transformer is especially adapted for use with the thermionic valves 9, 15 of a wavereception apparatus, the primary winding 4 being connected to the anode 8 of the first valve and to the battery 12, while the ends of the secondary winding are connected to the grid 14 of the second valve and to the battery 18. The windings are of equal inductance and may be wound in the form of flat disks which can be moved one over the other or reversed in order to vary the inductance for tuning purposes. In a modification, the twin wires are wound consecutively on two bases one of which is adjustable within the other about an axis lying in the planes of the windings. When more than one transformer is used, they are arranged as shown in Fig. 3, with a number of pairs of windings on two bases 19, 20. One of the bases slides in a groove in the other so that it is possible to tune all the transformers to the same natural period with one adjustment.
GB1622819A 1919-06-27 1919-06-27 Improvements in electrical transformers Expired GB148679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1622819A GB148679A (en) 1919-06-27 1919-06-27 Improvements in electrical transformers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1622819A GB148679A (en) 1919-06-27 1919-06-27 Improvements in electrical transformers

Publications (1)

Publication Number Publication Date
GB148679A true GB148679A (en) 1920-08-05

Family

ID=10073480

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1622819A Expired GB148679A (en) 1919-06-27 1919-06-27 Improvements in electrical transformers

Country Status (1)

Country Link
GB (1) GB148679A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1463070A2 (en) * 2003-03-28 2004-09-29 Northrop Grumman Corporation Mems variable inductor and capacitor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1463070A2 (en) * 2003-03-28 2004-09-29 Northrop Grumman Corporation Mems variable inductor and capacitor
EP1463070A3 (en) * 2003-03-28 2004-12-15 Northrop Grumman Corporation Mems variable inductor and capacitor
US6856499B2 (en) 2003-03-28 2005-02-15 Northrop Gurmman Corporation MEMS variable inductor and capacitor

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