GB402376A - Improvements relating to radio receiving apparatus - Google Patents

Improvements relating to radio receiving apparatus

Info

Publication number
GB402376A
GB402376A GB23535/33A GB2353533A GB402376A GB 402376 A GB402376 A GB 402376A GB 23535/33 A GB23535/33 A GB 23535/33A GB 2353533 A GB2353533 A GB 2353533A GB 402376 A GB402376 A GB 402376A
Authority
GB
United Kingdom
Prior art keywords
frequency amplifier
resistance
amplifier
audio
rectifier
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
GB23535/33A
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal Co Ltd
Westinghouse Brake and Saxby Signal Co Ltd
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 Westinghouse Brake and Signal Co Ltd, Westinghouse Brake and Saxby Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Publication of GB402376A publication Critical patent/GB402376A/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
    • H04B1/20—Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Circuits Of Receivers In General (AREA)
  • Structure Of Receivers (AREA)

Abstract

402,376. Wireless receiving systems. WESTINGHOUSE BRAKE SAXBY SIGNAL CO., Ltd., 82, York Road, King's Cross, London.-(Assignees of Place, W. P. ; 442, Rebecca Avenue, Wilkinsburg, Pennsylvania, U.S.A.) Aug. 24, 1933, No. 23535. Convention date, Aug. 25, 1932. [Class 40 (v).] A wireless receiver comprising a dry-surface contact rectifier fed from a preceding high or intermediate frequency amplifying valve, is converted into an amplifier for gramophones in which the high or intermediate frequency amplifier serves as an audio frequency amplifier. The dry-surface contact rectifier 3 is fed from a high frequency amplifier 1 and feeds an audio frequency amplifier 4. The inductance 10 passes audio-frequencies, the capacity 11 compensates for the capacity of the rectifier 3 and the resistance 12 dissipates direct current due to the rectified carrier wave. To convert the circuit to a gramophone amplifier, switch 24 is opened and switch arm 23 is moved from contact A to contact B. As a result resistance 12 is placed across earth and the plate circuit of valve 1 since the inductance 10 has small resistance to audio-frequencies and inductor 16 has a low direct-current resistance and a high alternating-current reactance. An autotransformer may be included in lead 25 (Fig. 2 not shown). The invention is also applicable to the intermediate frequency amplifier and second detector of a super-heterodyne receiver (Fig. 3 not shown).
GB23535/33A 1932-08-25 1933-08-24 Improvements relating to radio receiving apparatus Expired GB402376A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US630435A US1917898A (en) 1932-08-25 1932-08-25 Radio apparatus

Publications (1)

Publication Number Publication Date
GB402376A true GB402376A (en) 1933-11-30

Family

ID=24527150

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23535/33A Expired GB402376A (en) 1932-08-25 1933-08-24 Improvements relating to radio receiving apparatus

Country Status (2)

Country Link
US (1) US1917898A (en)
GB (1) GB402376A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB629954A (en) * 1946-11-01 1949-10-03 British Thomson Houston Co Ltd Improvements in circuit arrangements employing thermionic valves

Also Published As

Publication number Publication date
US1917898A (en) 1933-07-11

Similar Documents

Publication Publication Date Title
US1804526A (en) Radio receiving circuit
GB402376A (en) Improvements relating to radio receiving apparatus
US2385212A (en) Apparatus for communication systems
US2399968A (en) Receiving apparatus for communication systems
US2491590A (en) Means for limiting the modulation of the output of transmitters of communication systems
US2282377A (en) Control means for railway train communication apparatus
US2008279A (en) Program distribution for trains
GB481526A (en) Improvements in or relating to radio receiving systems
Wheeler Automatic volume control for radio receiving sets
GB571314A (en) Frequency modulation detector and converter
US2029396A (en) Apparatus for communication systems
US2131388A (en) Apparatus for communication systems
US1897767A (en) Wireless signaling device
US2095679A (en) Receiving apparatus for communication systems
US1445845A (en) Modulated signaling system particularly applicable to wireless signaling
US1790171A (en) Magnetic radio receiver
US1700652A (en) Radio receiving circuit
US2040198A (en) Apparatus for railway train communication systems
US2077205A (en) Radio receiver
US2239907A (en) Tuning control circuits
US1937783A (en) Wireless communication apparatus
US2460354A (en) Railway train communication system
GB196062A (en) Improvements in and relating to high frequency signalling systems
GB426347A (en) Improvements in or relating to radio and like receivers
GB520605A (en) Protective arrangement for thermionic valve apparatus