FR668893A - Adjustable core speaker - Google Patents

Adjustable core speaker

Info

Publication number
FR668893A
FR668893A FR668893DA FR668893A FR 668893 A FR668893 A FR 668893A FR 668893D A FR668893D A FR 668893DA FR 668893 A FR668893 A FR 668893A
Authority
FR
France
Prior art keywords
adjustable core
core speaker
speaker
adjustable
core
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.)
IDEAL WERKE AG
Original Assignee
IDEAL WERKE AG
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
Priority claimed from DEI34064D external-priority patent/DE471811C/en
Application filed by IDEAL WERKE AG filed Critical IDEAL WERKE AG
Application granted granted Critical
Publication of FR668893A publication Critical patent/FR668893A/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
    • H04R11/00—Transducers of moving-armature or moving-core type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR668893D 1928-04-04 1929-02-02 Adjustable core speaker Expired FR668893A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEI34064D DE471811C (en) 1928-04-04 1928-04-04 Loudspeaker system with a magnetically neutral armature rotating around its central axis
DEI35186D DE481259C (en) 1928-04-04 1928-08-10 Loudspeaker system with magnetically neutral armature rotating around its central axis

Publications (1)

Publication Number Publication Date
FR668893A true FR668893A (en) 1929-11-07

Family

ID=25981483

Family Applications (1)

Application Number Title Priority Date Filing Date
FR668893D Expired FR668893A (en) 1928-04-04 1929-02-02 Adjustable core speaker

Country Status (4)

Country Link
CH (1) CH137793A (en)
DE (1) DE481259C (en)
FR (1) FR668893A (en)
NL (1) NL27089C (en)

Also Published As

Publication number Publication date
DE481259C (en) 1929-08-16
CH137793A (en) 1930-01-31
NL27089C (en)

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