GB279390A - Improvements in acoustic apparatus, particularly applicable to telephone transmitters - Google Patents

Improvements in acoustic apparatus, particularly applicable to telephone transmitters

Info

Publication number
GB279390A
GB279390A GB19382/27A GB1938227A GB279390A GB 279390 A GB279390 A GB 279390A GB 19382/27 A GB19382/27 A GB 19382/27A GB 1938227 A GB1938227 A GB 1938227A GB 279390 A GB279390 A GB 279390A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
grooves
chamber
fabric
passage
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
GB19382/27A
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB279390A publication Critical patent/GB279390A/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
    • H04R19/00—Electrostatic transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
GB19382/27A 1926-10-20 1927-07-21 Improvements in acoustic apparatus, particularly applicable to telephone transmitters Expired GB279390A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US142790A US1722347A (en) 1926-10-20 1926-10-20 Acoustic apparatus

Publications (1)

Publication Number Publication Date
GB279390A true GB279390A (en) 1928-10-22

Family

ID=22501288

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19382/27A Expired GB279390A (en) 1926-10-20 1927-07-21 Improvements in acoustic apparatus, particularly applicable to telephone transmitters

Country Status (6)

Country Link
US (1) US1722347A (xx)
BE (1) BE345155A (xx)
DE (1) DE519901C (xx)
FR (1) FR639320A (xx)
GB (1) GB279390A (xx)
NL (1) NL22541C (xx)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500643A (en) * 1946-12-07 1950-03-14 Bell Telephone Labor Inc Condenser transducer independent of ambient atmospheric conditions
JPS5121791B2 (xx) * 1972-08-04 1976-07-05

Also Published As

Publication number Publication date
DE519901C (de) 1931-03-06
BE345155A (xx)
FR639320A (fr) 1928-06-19
NL22541C (xx)
US1722347A (en) 1929-07-30

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