FR646306A - Perfectionnements aux haut-parleurs - Google Patents

Perfectionnements aux haut-parleurs

Info

Publication number
FR646306A
FR646306A FR646306DA FR646306A FR 646306 A FR646306 A FR 646306A FR 646306D A FR646306D A FR 646306DA FR 646306 A FR646306 A FR 646306A
Authority
FR
France
Prior art keywords
enhancements
loudspeaker
loudspeaker enhancements
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
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 US152475A external-priority patent/US1824724A/en
Priority claimed from US154814A external-priority patent/US1713210A/en
Priority claimed from US164620A external-priority patent/US1689513A/en
Application filed by Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR646306A publication Critical patent/FR646306A/fr
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings
    • E21F15/06—Filling-up mechanically
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mining & Mineral Resources (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR646306D 1926-12-03 1927-12-03 Perfectionnements aux haut-parleurs Expired FR646306A (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US152475A US1824724A (en) 1926-12-03 1926-12-03 Electromagnetic device
US154814A US1713210A (en) 1926-12-14 1926-12-14 Cone-type loud-speaker
US164620A US1689513A (en) 1927-01-29 1927-01-29 Sound-reproducing device

Publications (1)

Publication Number Publication Date
FR646306A true FR646306A (fr) 1928-11-09

Family

ID=27387259

Family Applications (1)

Application Number Title Priority Date Filing Date
FR646306D Expired FR646306A (fr) 1926-12-03 1927-12-03 Perfectionnements aux haut-parleurs

Country Status (1)

Country Link
FR (1) FR646306A (fr)

Similar Documents

Publication Publication Date Title
FR698003A (fr) Perfectionnements aux haut-parleurs
FR695243A (fr) Perfectionnements aux haut-parleurs
FR616738A (fr) Haut-parleur
FR612462A (fr) Haut-parleur
FR640227A (fr) Perfectionnements aux haut-parleurs
FR622666A (fr) Perfectionnements aux haut-parleurs
BE368564R (fr) Perfectionnements aux haut-parleurs
BE352900R (fr) Perfectionnements aux haut-parleurs
FR36634E (fr) Perfectionnements aux hauts-parleurs
FR36830E (fr) Perfectionnements aux hauts-parleurs
FR37341E (fr) Perfectionnements aux haut-parleurs
FR38139E (fr) Perfectionnements aux haut-parleurs
FR35609E (fr) Perfectionnements aux haut-parleurs
FR35519E (fr) Perfectionnements aux haut-parleurs
FR646306A (fr) Perfectionnements aux haut-parleurs
BE359759R (fr) Perfectionnements aux haut-parleurs
BE351188R (fr) Perfectionnements aux haut-parleurs
FR632153A (fr) Perfectionnements aux téléphones
FR628689A (fr) Perfectionnements aux hauts-parleurs
FR36327E (fr) Perfectionnements aux haut-parleurs
FR36028E (fr) Perfectionnements aux hauts-parleurs
FR679871A (fr) Perfectionnements aux hauts-parleurs
FR682427A (fr) Perfectionnements aux haut-parleurs
FR617464A (fr) Haut-parleur
FR611038A (fr) Perfectionnements aux thermo-cautères