FR35519E - Loudspeaker enhancements - Google Patents

Loudspeaker enhancements

Info

Publication number
FR35519E
FR35519E FR35519DA FR35519E FR 35519 E FR35519 E FR 35519E FR 35519D A FR35519D A FR 35519DA FR 35519 E FR35519 E FR 35519E
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
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.)
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
Priority claimed from US194181A external-priority patent/US1833758A/en
Application filed by Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR35519E publication Critical patent/FR35519E/en
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
    • H04R7/16—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)
  • Mining & Mineral Resources (AREA)
  • Electromagnetism (AREA)
  • Multimedia (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR35519D 1926-12-03 1928-05-09 Loudspeaker enhancements Expired FR35519E (en)

Applications Claiming Priority (4)

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
US194181A US1833758A (en) 1927-05-25 1927-05-25 Device for producing sound

Publications (1)

Publication Number Publication Date
FR35519E true FR35519E (en) 1930-03-22

Family

ID=27496024

Family Applications (1)

Application Number Title Priority Date Filing Date
FR35519D Expired FR35519E (en) 1926-12-03 1928-05-09 Loudspeaker enhancements

Country Status (1)

Country Link
FR (1) FR35519E (en)

Similar Documents

Publication Publication Date Title
FR698003A (en) Loudspeaker enhancements
FR695243A (en) Loudspeaker enhancements
FR616738A (en) Loud speaker
FR612462A (en) Loud speaker
FR640227A (en) Loudspeaker enhancements
BE352900R (en) Loudspeaker enhancements
FR38139E (en) Loudspeaker enhancements
FR36830E (en) Loudspeaker enhancements
FR35609E (en) Loudspeaker enhancements
BE351188R (en) Loudspeaker enhancements
FR36634E (en) Loudspeaker enhancements
FR35519E (en) Loudspeaker enhancements
BE359759R (en) Loudspeaker enhancements
FR622666A (en) Loudspeaker enhancements
FR37341E (en) Loudspeaker enhancements
BE368564R (en) Loudspeaker enhancements
FR646306A (en) Loudspeaker enhancements
FR632153A (en) Phone enhancements
FR628689A (en) Loudspeaker enhancements
FR36327E (en) Loudspeaker enhancements
FR682427A (en) Loudspeaker enhancements
FR679871A (en) Loudspeaker enhancements
FR36028E (en) Loudspeaker enhancements
FR617464A (en) Loud speaker
FR611038A (en) Thermo-cautery enhancements