GB303541A - Improvements relating to electrical transformers or couplers - Google Patents

Improvements relating to electrical transformers or couplers

Info

Publication number
GB303541A
GB303541A GB2619327A GB2619327A GB303541A GB 303541 A GB303541 A GB 303541A GB 2619327 A GB2619327 A GB 2619327A GB 2619327 A GB2619327 A GB 2619327A GB 303541 A GB303541 A GB 303541A
Authority
GB
United Kingdom
Prior art keywords
winding
contacts
primary
conductor
former
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
GB2619327A
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 GB2619327A priority Critical patent/GB303541A/en
Publication of GB303541A publication Critical patent/GB303541A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F21/00Variable inductances or transformers of the signal type
    • H01F21/12Variable inductances or transformers of the signal type discontinuously variable, e.g. tapped

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

303,541. Twort, F. W. Oct. 4, 1927. Transformers.-Radio circuits are coupled together by a transformer with two or more windings so arranged that some or all of the turns or conductors of one winding are shielded by the corresponding conductors of another winding, the field of each shielded conductor having no direct access to adjacent conductors of the first winding nor to any conductor other than the corresponding conductor of the second winding. The conductors of the second winding may enclose those of the first. In a high-frequency transformer, the secondary comprises a copper tube c, Fig. 5, wound helically, in notches in longitudinal ribs b on a cylindrical former a, Fig. 6, and the primary k comprises a fine wire within part of the tube c and separated therefrom by an insulating tube or coating. The lower end of the former a carries evenly spaced contacts detachably engaged by protruding spring contacts g, Fig. 2, on a base e of the same shape as the former a, the circuit wires of the radio set being soldered to tabs h on the contacts g. The lower half c<2> of the secondary c is connected as in Fig. 6 to diametrically opposite contacts OS, ST<2> and the upper half c<1> to similar contacts IS, ST<1>. The contacts IS, OS form the terminals of the secondary and are thus connected to points at the centre of the winding the extreme ends of which are directly connected by joining the contacts g corresponding to the contacts ST<1>, ST<2>. Similarly, the primary winding comprises symmetrically arranged halves at the lower and upper end of the secondary, the extreme ends being joined together at k<1> and the ends nearest the centre of the former a being connected to diametrically opposite contacts IP, OP forming the terminals of the primary. The parts of the secondary not enclcsing the primary need not be hollow. The windings may be shielded by an axially adjustable metal cylinder within the former. In a high-frequency amplifier for short wave lengths, the primary is connected in an aerial or anode circuit, the connected terminals ST<1>, ST<2> are connected through a high resistance to the filament of the next valve, and the terminals of the secondary are connected to the grid and neutralizing condenser. In modifications, a reaction coil may be arranged in the parts of the tube c not occupied by the primary k or as a separate winding. In another modification, more than two concentric conductors are employed, the primary conductor k being hollow to enclose another winding. In other modifications, the primary may comprise a tubular conductor enclosing the secondary or the tubular conductor is replaced by a strip wound around or folded over the other conductor. Specification 288,379, [Class 40 (v), Wireless signalling &c.], is referred to.
GB2619327A 1927-10-04 1927-10-04 Improvements relating to electrical transformers or couplers Expired GB303541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2619327A GB303541A (en) 1927-10-04 1927-10-04 Improvements relating to electrical transformers or couplers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2619327A GB303541A (en) 1927-10-04 1927-10-04 Improvements relating to electrical transformers or couplers

Publications (1)

Publication Number Publication Date
GB303541A true GB303541A (en) 1929-01-04

Family

ID=10239798

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2619327A Expired GB303541A (en) 1927-10-04 1927-10-04 Improvements relating to electrical transformers or couplers

Country Status (1)

Country Link
GB (1) GB303541A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0118269A1 (en) * 1983-02-28 1984-09-12 CODMAN &amp; SHURTLEFF INC. Electrical transformer
GB2139003A (en) * 1983-04-08 1984-10-31 Gen Electric Co Plc Electrical windings
EP1271573A2 (en) * 2001-06-16 2003-01-02 Bohnert GmbH Inductance with core

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0118269A1 (en) * 1983-02-28 1984-09-12 CODMAN &amp; SHURTLEFF INC. Electrical transformer
GB2139003A (en) * 1983-04-08 1984-10-31 Gen Electric Co Plc Electrical windings
EP1271573A2 (en) * 2001-06-16 2003-01-02 Bohnert GmbH Inductance with core
EP1271573A3 (en) * 2001-06-16 2003-01-22 Bohnert GmbH Inductance with core

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