FR37341E - Loudspeaker enhancements - Google Patents

Loudspeaker enhancements

Info

Publication number
FR37341E
FR37341E FR37341DA FR37341E FR 37341 E FR37341 E FR 37341E FR 37341D A FR37341D A FR 37341DA FR 37341 E FR37341 E FR 37341E
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
Priority claimed from US206408A external-priority patent/US1694319A/en
Priority claimed from US241967A external-priority patent/US1688804A/en
Priority claimed from US269519A external-priority patent/US1754044A/en
Priority claimed from GB2127128A external-priority patent/GB316005A/en
Application filed by Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR37341E publication Critical patent/FR37341E/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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • 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
FR37341D 1926-12-03 1929-07-23 Loudspeaker enhancements Expired FR37341E (en)

Applications Claiming Priority (9)

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
US206408A US1694319A (en) 1927-07-18 1927-07-18 Apparatus for producing sound
US23977527A 1927-12-13 1927-12-13
US241967A US1688804A (en) 1927-12-22 1927-12-22 Sound-producing apparatus
US269519A US1754044A (en) 1928-04-12 1928-04-12 Sound-producing device
GB2127128A GB316005A (en) 1928-07-23 1928-07-23 Improvements in and relating to apparatus for re-producing and transmitting sound

Publications (1)

Publication Number Publication Date
FR37341E true FR37341E (en) 1930-11-15

Family

ID=27579355

Family Applications (1)

Application Number Title Priority Date Filing Date
FR37341D Expired FR37341E (en) 1926-12-03 1929-07-23 Loudspeaker enhancements

Country Status (1)

Country Link
FR (1) FR37341E (en)

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