GB388269A - Improvements in or relating to sound producing devices - Google Patents

Improvements in or relating to sound producing devices

Info

Publication number
GB388269A
GB388269A GB16477/32A GB1647732A GB388269A GB 388269 A GB388269 A GB 388269A GB 16477/32 A GB16477/32 A GB 16477/32A GB 1647732 A GB1647732 A GB 1647732A GB 388269 A GB388269 A GB 388269A
Authority
GB
United Kingdom
Prior art keywords
air
valve
head
flow
valve head
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
GB16477/32A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB388269A publication Critical patent/GB388269A/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
    • H04R1/42—Combinations of transducers with fluid-pressure or other non-electrical amplifying means

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Valves (AREA)
  • Golf Clubs (AREA)
GB16477/32A 1931-06-10 1932-06-10 Improvements in or relating to sound producing devices Expired GB388269A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US543341A US1935185A (en) 1931-06-10 1931-06-10 Sound producing device

Publications (1)

Publication Number Publication Date
GB388269A true GB388269A (en) 1933-02-23

Family

ID=24167593

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16477/32A Expired GB388269A (en) 1931-06-10 1932-06-10 Improvements in or relating to sound producing devices

Country Status (4)

Country Link
US (1) US1935185A (OSRAM)
BE (1) BE389124A (OSRAM)
DE (1) DE651418C (OSRAM)
GB (1) GB388269A (OSRAM)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936480B2 (ja) * 1976-02-10 1984-09-04 ソニー株式会社 スピ−カ装置

Also Published As

Publication number Publication date
BE389124A (OSRAM)
US1935185A (en) 1933-11-14
DE651418C (de) 1937-10-13

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