GB313990A - Improvements relating to gramophone and like sound reproducing instruments - Google Patents

Improvements relating to gramophone and like sound reproducing instruments

Info

Publication number
GB313990A
GB313990A GB847028A GB847028A GB313990A GB 313990 A GB313990 A GB 313990A GB 847028 A GB847028 A GB 847028A GB 847028 A GB847028 A GB 847028A GB 313990 A GB313990 A GB 313990A
Authority
GB
United Kingdom
Prior art keywords
gramophone
loudspeaker
driven
amplified
stylus
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
GB847028A
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 GB847028A priority Critical patent/GB313990A/en
Publication of GB313990A publication Critical patent/GB313990A/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
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

313,990. Aspden, R. L. March 20, 1928. Gramophone pickups ; loud-speakers.- A gramophone pickup and a loudspeaker are combined in a single unit for connection to the usual gramophone tone arm and horn, the two instruments being connected to the input and output respectively of an amplifier. The case d, its divided into two compartments m, n, the former containing a loudspeaker unit of known construction. Compartment n contains a metal disc b set in vibration by stylus bar a, damped by soft rubber f, and a coil c in close proximity to b carries high-frequency current from a combined oscillator and amplifier l, the output of which is fed to the loudspeaker. According to the Provisional Specification, a reed-driven unit driven by the amplified currents may be connected to the stylus bar to increase the initial movements and provide a regenerative effect. Alternatively a stylus-driven diaphragm may have its movements amplified, by electromagnets energized by the amplified currents, and acting on its outer portion.
GB847028A 1928-03-20 1928-03-20 Improvements relating to gramophone and like sound reproducing instruments Expired GB313990A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB847028A GB313990A (en) 1928-03-20 1928-03-20 Improvements relating to gramophone and like sound reproducing instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB847028A GB313990A (en) 1928-03-20 1928-03-20 Improvements relating to gramophone and like sound reproducing instruments

Publications (1)

Publication Number Publication Date
GB313990A true GB313990A (en) 1929-06-20

Family

ID=9853068

Family Applications (1)

Application Number Title Priority Date Filing Date
GB847028A Expired GB313990A (en) 1928-03-20 1928-03-20 Improvements relating to gramophone and like sound reproducing instruments

Country Status (1)

Country Link
GB (1) GB313990A (en)

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