GB315505A - Improvements relating to gramophones and like sound reproducing instruments - Google Patents

Improvements relating to gramophones and like sound reproducing instruments

Info

Publication number
GB315505A
GB315505A GB1282428A GB1282428A GB315505A GB 315505 A GB315505 A GB 315505A GB 1282428 A GB1282428 A GB 1282428A GB 1282428 A GB1282428 A GB 1282428A GB 315505 A GB315505 A GB 315505A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
frequency
stylus
insulated
amplifier
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
GB1282428A
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 GB1282428A priority Critical patent/GB315505A/en
Priority to GB2451828A priority patent/GB318380A/en
Priority to FR669543D priority patent/FR669543A/en
Publication of GB315505A publication Critical patent/GB315505A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

315,505. Aspden, R. L. May 1 1928. Gramophone pickups; condenser telephones; magnetic instruments.-A gramophone pick-up is provided with a diaphragm which in addition to reproducing sounds directly through the usual tone-arm and horn causes modulation of the electric current in a high-frequency circuit partly within it. In one modification Fig. 1, the diaphragm d which may be of metal, or coated with metallic filings and is insulated from the sound-box, in addition to reproducing sounds directly through the tone-arm when impulsed by stylus c, and stylus-bar b, also influences the high-frequency currents in the coil e, connected through terminals f and g to a source of high-frequency current and an amplifier and loud-speaker. In another modification, Fig. 3, the diaphragm d and metal ring e form the electrodes of a condenser which is connected in a high-frequency circuit, and to an amplifier. In this case, the diaphragm is in electrical contact with the casing a and terminal f while ring e and terminal g are connected together and insulated from the case.
GB1282428A 1928-05-01 1928-05-01 Improvements relating to gramophones and like sound reproducing instruments Expired GB315505A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1282428A GB315505A (en) 1928-05-01 1928-05-01 Improvements relating to gramophones and like sound reproducing instruments
GB2451828A GB318380A (en) 1928-05-01 1928-08-25 Improvements in sound reproducing and recording means
FR669543D FR669543A (en) 1928-05-01 1929-02-13 Improvements to Reproductive Devices and Sound Recorders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1282428A GB315505A (en) 1928-05-01 1928-05-01 Improvements relating to gramophones and like sound reproducing instruments

Publications (1)

Publication Number Publication Date
GB315505A true GB315505A (en) 1929-07-18

Family

ID=10011798

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1282428A Expired GB315505A (en) 1928-05-01 1928-05-01 Improvements relating to gramophones and like sound reproducing instruments
GB2451828A Expired GB318380A (en) 1928-05-01 1928-08-25 Improvements in sound reproducing and recording means

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2451828A Expired GB318380A (en) 1928-05-01 1928-08-25 Improvements in sound reproducing and recording means

Country Status (2)

Country Link
FR (1) FR669543A (en)
GB (2) GB315505A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5094902A (en) * 1973-12-22 1975-07-29

Also Published As

Publication number Publication date
FR669543A (en) 1929-11-18
GB318380A (en) 1929-09-05

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