GB346299A - Improvements in or relating to alternating current frequency selective arrangements - Google Patents

Improvements in or relating to alternating current frequency selective arrangements

Info

Publication number
GB346299A
GB346299A GB60630A GB60630A GB346299A GB 346299 A GB346299 A GB 346299A GB 60630 A GB60630 A GB 60630A GB 60630 A GB60630 A GB 60630A GB 346299 A GB346299 A GB 346299A
Authority
GB
United Kingdom
Prior art keywords
circuits
tuned
switch
coupled
receiving
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
GB60630A
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.)
COLIN HECTOR WILLIAM BROOKES S
STC PLC
Original Assignee
COLIN HECTOR WILLIAM BROOKES S
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 COLIN HECTOR WILLIAM BROOKES S, Standard Telephone and Cables PLC filed Critical COLIN HECTOR WILLIAM BROOKES S
Priority to GB60630A priority Critical patent/GB346299A/en
Publication of GB346299A publication Critical patent/GB346299A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

346,299. Wireless receiving systems. STANDARD TELEPHONES & CABLES, Ltd. and SMITH, C. H. W. BROOKES-, Columbia House, Aldwych, London. Jan. 7, 1930, No. 606. [Class 40 (v).] An electric filtering arrangement for alternative wireless reception on different wavelengths, comprises a plurality of mutuallycoupled closed resonant circuits L1, Cl ; L2, C2 each tuned to a different frequency, and means for switching any one of the circuits to a receiving-valve V or other load. As shown, two closed circuits tuned to the respective wavelengths are both coupled to a coil L3 in the aerial, and when either circuit is connected by switch K1 to the receiver, the other absorbs energy of the undesired frequency. A second pair of contacts K2 on the switch may serve to connect a condenser C3, equivalent to the grid-filament capacity, across the non-receiving circuit. The tuned circuits may be coupled either magnetically or by capacity or resistance coupling. The two transmissions may be brought to the same volume level by means of potentiometers or resistances ; or by varying the coupling between the coils L1, L2, L3.
GB60630A 1930-01-07 1930-01-07 Improvements in or relating to alternating current frequency selective arrangements Expired GB346299A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB60630A GB346299A (en) 1930-01-07 1930-01-07 Improvements in or relating to alternating current frequency selective arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB60630A GB346299A (en) 1930-01-07 1930-01-07 Improvements in or relating to alternating current frequency selective arrangements

Publications (1)

Publication Number Publication Date
GB346299A true GB346299A (en) 1931-04-07

Family

ID=9707337

Family Applications (1)

Application Number Title Priority Date Filing Date
GB60630A Expired GB346299A (en) 1930-01-07 1930-01-07 Improvements in or relating to alternating current frequency selective arrangements

Country Status (1)

Country Link
GB (1) GB346299A (en)

Similar Documents

Publication Publication Date Title
GB603437A (en) Improvements in or relating to frequency discriminator circuits
GB346299A (en) Improvements in or relating to alternating current frequency selective arrangements
ES364479A1 (en) Circuit arrangement for receiving electrical signals
US2215774A (en) Combined wired radio and space radio receiving system
US1934736A (en) Telephone station circuit
GB450272A (en) Improvements in apparatus for receiving electrical signals
US2052686A (en) Multirange regenerative receiver
US1656839A (en) Means for preventing retroactive effects in audion amplifier circuits
GB410499A (en) Improvements in or relating to electrical resonant circuit arrangements
GB340615A (en) Improvements in or relating to thermionic amplifiers
US1623479A (en) Multiplex signaling
GB425566A (en) Improvements in or relating to telephone instrument circuits
GB404349A (en) Improvements in or relating to frequency selective circuit arrangements for use in radio reception
GB445917A (en) Carrier wave signalling system
US1749416A (en) Telephone and telegraph circuits
US1967218A (en) Radio plural program receiving system
GB476701A (en) Improvements in and relating to radio communication systems
US1977125A (en) Transmission of electrical impulses by radio
US1374219A (en) Composite transmission system
US1614458A (en) Radio receiving system
GB262507A (en) Improvements in or relating to switch apparatus for use with telephonic receivers
GB244169A (en) Improvements in receiving apparatus for high frequency signalling systems
GB462460A (en) Improvements in receivers for radio communication
GB454503A (en) Improvements in or relating to electrical filters
GB277799A (en) Improvements in circuit arrangements for radio receiving systems