GB328497A - An electrical sound-box for talking machines - Google Patents

An electrical sound-box for talking machines

Info

Publication number
GB328497A
GB328497A GB1951129A GB1951129A GB328497A GB 328497 A GB328497 A GB 328497A GB 1951129 A GB1951129 A GB 1951129A GB 1951129 A GB1951129 A GB 1951129A GB 328497 A GB328497 A GB 328497A
Authority
GB
United Kingdom
Prior art keywords
chambers
lever
microphone
electrodes
groups
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
GB1951129A
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
Priority to GB1951129A priority Critical patent/GB328497A/en
Priority to FR679623D priority patent/FR679623A/fr
Publication of GB328497A publication Critical patent/GB328497A/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/04—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
GB1951129A 1929-06-25 1929-06-25 An electrical sound-box for talking machines Expired GB328497A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1951129A GB328497A (en) 1929-06-25 1929-06-25 An electrical sound-box for talking machines
FR679623D FR679623A (fr) 1929-06-25 1929-07-31 Pick-up pour machine parlante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1951129A GB328497A (en) 1929-06-25 1929-06-25 An electrical sound-box for talking machines

Publications (1)

Publication Number Publication Date
GB328497A true GB328497A (en) 1930-05-01

Family

ID=10130592

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1951129A Expired GB328497A (en) 1929-06-25 1929-06-25 An electrical sound-box for talking machines

Country Status (2)

Country Link
FR (1) FR679623A (fr)
GB (1) GB328497A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429137A (en) * 1945-08-02 1947-10-14 John J Root Electric phonograph resistance type pickup
US2590439A (en) * 1948-05-12 1952-03-25 Star Electronics Inc Push-pull resistance type phonograph pickup

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429137A (en) * 1945-08-02 1947-10-14 John J Root Electric phonograph resistance type pickup
US2590439A (en) * 1948-05-12 1952-03-25 Star Electronics Inc Push-pull resistance type phonograph pickup

Also Published As

Publication number Publication date
FR679623A (fr) 1930-04-15

Similar Documents

Publication Publication Date Title
GB328497A (en) An electrical sound-box for talking machines
US2025388A (en) Sound reproducing system
US1978200A (en) Electrostatic acoustic device
US2126370A (en) Sound recording and sound reproducing and locating apparatus
GB776280A (en) Improvements in or relating to moving coil loudspeakers and microphones
US1790636A (en) Locally controlling radio receiving apparatus
US2255840A (en) Communicating device and system
US1697007A (en) Telephone system
US1661539A (en) Phonograph system
US1829109A (en) Electric circuit coupling device
US857530A (en) Wireless telephone.
US1567683A (en) Sound-transmission apparatus
US2242964A (en) Microphone
US281240A (en) Telephone-transmitter
US2763719A (en) Intercommunication devices
US1658479A (en) Loud speaker
US584737A (en) gould
GB461234A (en) Improvements in or relating to sound translating devices
US1565968A (en) Arrangement on talking apparatus for the reception and reproduction of records
US1656781A (en) Production or conversion of sound by or into electric currents
US1509817A (en) Telephonically-opesated sound recording- and reproducing machine
US1242372A (en) Phonic apparatus.
US1329928A (en) Sound-magnifying phonograph
US361047A (en) Telephone-transmitter
US1929928A (en) Sound reproducing system