GB322514A - Improvements in gramophones, megaphones, and other apparatus for the recording and transmitting of sound waves - Google Patents

Improvements in gramophones, megaphones, and other apparatus for the recording and transmitting of sound waves

Info

Publication number
GB322514A
GB322514A GB2548028A GB2548028A GB322514A GB 322514 A GB322514 A GB 322514A GB 2548028 A GB2548028 A GB 2548028A GB 2548028 A GB2548028 A GB 2548028A GB 322514 A GB322514 A GB 322514A
Authority
GB
United Kingdom
Prior art keywords
megaphones
gramophones
recording
transmitting
sound waves
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
GB2548028A
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 GB2548028A priority Critical patent/GB322514A/en
Publication of GB322514A publication Critical patent/GB322514A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

322,514. Borgqvist, A. H. Sept. 5, 1928. Tone-arms. - A tonearm b has a number of spirals or convolutions s and a flared extension c which is surrounded by the throat section d of the horn. The section containing the convolutions may be removable so that it can be replaced by a section having a greater or smaller number of convolutions.
GB2548028A 1928-09-05 1928-09-05 Improvements in gramophones, megaphones, and other apparatus for the recording and transmitting of sound waves Expired GB322514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2548028A GB322514A (en) 1928-09-05 1928-09-05 Improvements in gramophones, megaphones, and other apparatus for the recording and transmitting of sound waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2548028A GB322514A (en) 1928-09-05 1928-09-05 Improvements in gramophones, megaphones, and other apparatus for the recording and transmitting of sound waves

Publications (1)

Publication Number Publication Date
GB322514A true GB322514A (en) 1929-12-05

Family

ID=10228380

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2548028A Expired GB322514A (en) 1928-09-05 1928-09-05 Improvements in gramophones, megaphones, and other apparatus for the recording and transmitting of sound waves

Country Status (1)

Country Link
GB (1) GB322514A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325603A (en) * 1997-05-24 1998-11-25 Celestion Int Ltd Acoustic horns for loudspeakers incorporate vibration damping material
GB2329788A (en) * 1997-09-26 1999-03-31 Daewoo Electronics Co Ltd Television speaker with vibration plate for reducing vibration of the casing

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325603A (en) * 1997-05-24 1998-11-25 Celestion Int Ltd Acoustic horns for loudspeakers incorporate vibration damping material
US6116373A (en) * 1997-05-24 2000-09-12 Kh Technology Corporation Acoustic horns for loudspeakers
GB2325603B (en) * 1997-05-24 2001-08-22 Celestion Internat Ltd Acoustic horns for loudspeakers
GB2329788A (en) * 1997-09-26 1999-03-31 Daewoo Electronics Co Ltd Television speaker with vibration plate for reducing vibration of the casing
US6205229B1 (en) 1997-09-26 2001-03-20 Daewoo Electronics Co., Ltd. Television having a device for preventing vibration of speaker
GB2329788B (en) * 1997-09-26 2001-10-24 Daewoo Electronics Co Ltd Television having a device for preventing vibration of speaker

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