GB221923A - Improvements in or relating to loud speaking telephones - Google Patents

Improvements in or relating to loud speaking telephones

Info

Publication number
GB221923A
GB221923A GB1981123A GB1981123A GB221923A GB 221923 A GB221923 A GB 221923A GB 1981123 A GB1981123 A GB 1981123A GB 1981123 A GB1981123 A GB 1981123A GB 221923 A GB221923 A GB 221923A
Authority
GB
United Kingdom
Prior art keywords
bridge
armature
sound box
loud
rest
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
GB1981123A
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 GB1981123A priority Critical patent/GB221923A/en
Publication of GB221923A publication Critical patent/GB221923A/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
    • H04R11/02—Loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stringed Musical Instruments (AREA)

Abstract

221,923. Clark, W. Aug. 2, 1923. Loud-speakers; magnetic receivers.-In a loud-speaking telephone, the armature g of the electromagnetic system is mounted on a vibrating bridge e supported at its ends and connected at or near its middle portion to a sound box i. Fig. 2 shows the mounting of the bridge e on the plate d, which carries the electromagnetic system cooperating with the armature g. The armature may be laminated. Springs p ensure freedom of vibration. The magnetic system, Fig. 3, comprises a ring-shaped magnet a having inwardly directed radial poles b arranged at right angles to the bridge member e. The sound box may be of the violin type with a bridge j, and may be connected to the rest of the apparatus by adjustable clamping members k. Or an ordinary violin may be used as the sound box, and supported above the rest of the instrument on adjustable sockets.
GB1981123A 1923-08-02 1923-08-02 Improvements in or relating to loud speaking telephones Expired GB221923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1981123A GB221923A (en) 1923-08-02 1923-08-02 Improvements in or relating to loud speaking telephones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1981123A GB221923A (en) 1923-08-02 1923-08-02 Improvements in or relating to loud speaking telephones

Publications (1)

Publication Number Publication Date
GB221923A true GB221923A (en) 1924-09-25

Family

ID=10135610

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1981123A Expired GB221923A (en) 1923-08-02 1923-08-02 Improvements in or relating to loud speaking telephones

Country Status (1)

Country Link
GB (1) GB221923A (en)

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