GB310519A - Improvements in arrangements for converting sound waves into electrical energy - Google Patents

Improvements in arrangements for converting sound waves into electrical energy

Info

Publication number
GB310519A
GB310519A GB10617/29A GB1061729A GB310519A GB 310519 A GB310519 A GB 310519A GB 10617/29 A GB10617/29 A GB 10617/29A GB 1061729 A GB1061729 A GB 1061729A GB 310519 A GB310519 A GB 310519A
Authority
GB
United Kingdom
Prior art keywords
coils
loudspeakers
circuits
armature
pick
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
GB10617/29A
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.)
DOMINION GRAMOPHONE RECORDS FO
Original Assignee
DOMINION GRAMOPHONE RECORDS FO
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 DOMINION GRAMOPHONE RECORDS FO filed Critical DOMINION GRAMOPHONE RECORDS FO
Publication of GB310519A publication Critical patent/GB310519A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H04R3/14—Cross-over networks

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

310,519. Dominion Gramophone Records (Foreign & Colonial), Ltd., (Assignees of Merkel, A., and Halpenny, R. R.). April 28, 1928, [Convention date]. Electric circuit arrangements for amplifying sound currents.-A moving-armature pick-up has a plurality of coils, responsive to different frequency ranges, connected to one or more amplifiers and loud-speakers in such a way that the whole frequency range is reproduced. The moving-armature 2 is surrounded by coils 5, 6 connected in circuits 11, 17 comprising respectively variable resistances 7, 13, variable condensers 8, 14 and the primaries of transformers 10, 16 'which feed amplifiers 12, 18 and loudspeakers 19, 20 respectively, the circuits being tuned by the condensers, and their resonance peaks broadened by the resistances. The loudspeakers may respond equally to all frequencies, or to a band of frequencies suited to the input currents, or a single loud-speaker having a double coil unit may replace the two. Alternatively, a single amplifier may be used, fed from a transformer having a plurality of primary windings connected to the pick-up coils.
GB10617/29A 1928-04-28 1929-04-05 Improvements in arrangements for converting sound waves into electrical energy Expired GB310519A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US310519XA 1928-04-28 1928-04-28

Publications (1)

Publication Number Publication Date
GB310519A true GB310519A (en) 1930-07-07

Family

ID=21857411

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10617/29A Expired GB310519A (en) 1928-04-28 1929-04-05 Improvements in arrangements for converting sound waves into electrical energy

Country Status (2)

Country Link
FR (1) FR672303A (en)
GB (1) GB310519A (en)

Also Published As

Publication number Publication date
FR672303A (en) 1929-12-26

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