GB477967A - Improvements in telephonic arrangements applicable to acoustic frequency amplifiers - Google Patents

Improvements in telephonic arrangements applicable to acoustic frequency amplifiers

Info

Publication number
GB477967A
GB477967A GB9664/36A GB966436A GB477967A GB 477967 A GB477967 A GB 477967A GB 9664/36 A GB9664/36 A GB 9664/36A GB 966436 A GB966436 A GB 966436A GB 477967 A GB477967 A GB 477967A
Authority
GB
United Kingdom
Prior art keywords
telephonic
acoustic frequency
frequency amplifiers
arrangements applicable
arrangements
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
GB9664/36A
Other languages
English (en)
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
Publication of GB477967A publication Critical patent/GB477967A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
GB9664/36A 1936-03-23 1936-04-01 Improvements in telephonic arrangements applicable to acoustic frequency amplifiers Expired GB477967A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR815434T 1936-03-23

Publications (1)

Publication Number Publication Date
GB477967A true GB477967A (en) 1938-01-06

Family

ID=9267247

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9664/36A Expired GB477967A (en) 1936-03-23 1936-04-01 Improvements in telephonic arrangements applicable to acoustic frequency amplifiers

Country Status (3)

Country Link
BE (1) BE414653A (es)
FR (2) FR788456A (es)
GB (1) GB477967A (es)

Also Published As

Publication number Publication date
FR788456A (fr) 1935-10-10
FR815434A (fr) 1937-07-12
BE414653A (es)

Similar Documents

Publication Publication Date Title
GB477967A (en) Improvements in telephonic arrangements applicable to acoustic frequency amplifiers
GB1082738A (en) Cow bell instrument
GB791793A (en) Improvements in or relating to low-frequency amplifiers
GB536616A (en) Improvements in feedback circuit arrangements for use in thermionic valve repeater or amplifier circuit arrangements
GB300252A (en) Improvements in or relating to circuit arrangements suitable for biassing electrostatic loud speakers
GB282127A (en) Improvements relating to sound reproducing apparatus
ES331374A3 (es) Perfeccionamientos en circuitos amplificadores para aparatos fonoreproductores.
GB437641A (en) Improved amplifiers for television
GB516286A (en) Improvements in tone-control circuits for audio-frequency amplifiers
GB429419A (en) Ultra-short wave reception device
GB335639A (en) Improvements in thermionic amplifiers for use in conjunction with photo-electric devices
GB788543A (en) Improvements in or relating to apparatus for reproducing sound from audio-frequency electrical signals
GB699883A (en) Improvements in or relating to telephone amplifiers
AU2433425A (en) Improvements in and connected with adjustments forthe magnets in telephone receivers andthe like
GB222413A (en) Improvements in electric corrective or modifying circuits for use with apparatus forreproducing sound
GB500865A (en) Improvements in or relating to electron discharge device audio amplifiers
AU2384225A (en) Improvements in or connected with loud speakers and other sound receiving, sound reproducing or sound transmitting apparatus
AU104108B2 (en) Improvements in loud speakers
GB320766A (en) Improvements in or connected with sound reproducers, musical instruments or the like
GB514285A (en) Improvements in or relating to tone-controlling impedance networks
CA258208A (en) Receiving and transmitting telephone including loud speaker
GB513678A (en) Improvements in loud-speaking telephone circuit arrangements
GB787355A (en) Improvements in or relating to audio-frequency thermionic valve amplifiers
GB543388A (en) Improvements in installations for conversation in both directions between two points
AU2433225A (en) Improvements in sound ampliflers for talking machines, telephone receivers and like instruments