GB230638A - Improvements relating to variable inductance coils and circuits for wireless reception - Google Patents

Improvements relating to variable inductance coils and circuits for wireless reception

Info

Publication number
GB230638A
GB230638A GB769624A GB769624A GB230638A GB 230638 A GB230638 A GB 230638A GB 769624 A GB769624 A GB 769624A GB 769624 A GB769624 A GB 769624A GB 230638 A GB230638 A GB 230638A
Authority
GB
United Kingdom
Prior art keywords
terminal
circuits
strips
wireless reception
improvements relating
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
GB769624A
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 GB769624A priority Critical patent/GB230638A/en
Publication of GB230638A publication Critical patent/GB230638A/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
    • H01F21/12—Variable inductances or transformers of the signal type discontinuously variable, e.g. tapped

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

230,638. Rathbone, J. J. March 26, 1924. Receiving sets, construction of.-A receiving apparatus has an inductance coil A provided with a plurality of variable tuning contacts E, E<1> connected to the input in parallel. Fig. 1 shows apparatus employing a crystal detector L, the circuit being shown in Fig. 3. The coil A is mounted between end pieces C, C<1> connected by an insulating bar D on which are pivoted three metal contact strips E, E', F. The strips E, E' are connected in parallel to the input or aerial terminal G, the strip F being connected to an earth terminal H which is connected through a metal strip K to a terminal J. The ends of the coil A are connected to the detector L which is also connected to a terminal M. The terminals M, J are the output terminals of the apparatus to which telephones N may be connected as shown in Fig. 3. The strips E, E<1>, F may be arranged to slide along the bar D instead of being pivoted as in Fig. 1.
GB769624A 1924-03-26 1924-03-26 Improvements relating to variable inductance coils and circuits for wireless reception Expired GB230638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB769624A GB230638A (en) 1924-03-26 1924-03-26 Improvements relating to variable inductance coils and circuits for wireless reception

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB769624A GB230638A (en) 1924-03-26 1924-03-26 Improvements relating to variable inductance coils and circuits for wireless reception

Publications (1)

Publication Number Publication Date
GB230638A true GB230638A (en) 1925-03-19

Family

ID=9838019

Family Applications (1)

Application Number Title Priority Date Filing Date
GB769624A Expired GB230638A (en) 1924-03-26 1924-03-26 Improvements relating to variable inductance coils and circuits for wireless reception

Country Status (1)

Country Link
GB (1) GB230638A (en)

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