FR636865A - Improvements to electro-dynamic devices - Google Patents

Improvements to electro-dynamic devices

Info

Publication number
FR636865A
FR636865A FR636865DA FR636865A FR 636865 A FR636865 A FR 636865A FR 636865D A FR636865D A FR 636865DA FR 636865 A FR636865 A FR 636865A
Authority
FR
France
Prior art keywords
electro
dynamic devices
dynamic
devices
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
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR636865A publication Critical patent/FR636865A/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
    • H04R9/06—Loudspeakers
    • 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
    • H04R9/02—Details
    • H04R9/022—Cooling arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
FR636865D 1926-08-04 1927-06-30 Improvements to electro-dynamic devices Expired FR636865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US127152A US1707544A (en) 1926-08-04 1926-08-04 Electrodynamic device

Publications (1)

Publication Number Publication Date
FR636865A true FR636865A (en) 1928-04-18

Family

ID=22428569

Family Applications (1)

Application Number Title Priority Date Filing Date
FR636865D Expired FR636865A (en) 1926-08-04 1927-06-30 Improvements to electro-dynamic devices

Country Status (5)

Country Link
US (1) US1707544A (en)
DE (1) DE527965C (en)
FR (1) FR636865A (en)
GB (1) GB275567A (en)
NL (1) NL23790C (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902015C (en) * 1940-09-04 1954-01-18 Klangfilm Gmbh Hyperbaric loudspeaker
US2463762A (en) * 1941-11-14 1949-03-08 Automatic Elect Lab Electroacoustical transducer
US2485405A (en) * 1944-04-21 1949-10-18 Stromberg Carlson Co Dipole microphone
DE911143C (en) * 1951-11-25 1954-05-10 Siemens Ag Loudspeaker system with pressure chamber and an onion for sound guidance
US2832844A (en) * 1957-04-29 1958-04-29 Univ Loudspeakers Inc Speaker driver
JP3140895B2 (en) * 1993-10-08 2001-03-05 パイオニア株式会社 Speaker device
US20240121558A1 (en) 2022-05-09 2024-04-11 B&C Speakers S.P.A. Acoustic compression chamber with modally coupled annular diaphragm

Also Published As

Publication number Publication date
NL23790C (en)
DE527965C (en) 1931-06-24
US1707544A (en) 1929-04-02
GB275567A (en) 1928-01-19

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