GB307106A - Improvements relating to electro-magnetic acoustic devices, such as loud-speakers - Google Patents

Improvements relating to electro-magnetic acoustic devices, such as loud-speakers

Info

Publication number
GB307106A
GB307106A GB3258127A GB3258127A GB307106A GB 307106 A GB307106 A GB 307106A GB 3258127 A GB3258127 A GB 3258127A GB 3258127 A GB3258127 A GB 3258127A GB 307106 A GB307106 A GB 307106A
Authority
GB
United Kingdom
Prior art keywords
reed
armature
pole
copper
poles
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
GB3258127A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB3258127A priority Critical patent/GB307106A/en
Priority to DE1928583770D priority patent/DE583770C/de
Priority to FR36327D priority patent/FR36327E/fr
Priority to BE356543D priority patent/BE356543A/fr
Publication of GB307106A publication Critical patent/GB307106A/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
    • H04R7/02—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)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
GB3258127A 1927-12-02 1927-12-02 Improvements relating to electro-magnetic acoustic devices, such as loud-speakers Expired GB307106A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB3258127A GB307106A (en) 1927-12-02 1927-12-02 Improvements relating to electro-magnetic acoustic devices, such as loud-speakers
DE1928583770D DE583770C (de) 1927-12-02 1928-11-30 Daempfungseinrichtung fuer elektromagnetische Schallaufnahme- oder -wiedergabegeraete
FR36327D FR36327E (fr) 1927-12-02 1928-12-01 Perfectionnements aux haut-parleurs
BE356543D BE356543A (enExample) 1927-12-02 1928-12-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3258127A GB307106A (en) 1927-12-02 1927-12-02 Improvements relating to electro-magnetic acoustic devices, such as loud-speakers

Publications (1)

Publication Number Publication Date
GB307106A true GB307106A (en) 1929-03-04

Family

ID=10340862

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3258127A Expired GB307106A (en) 1927-12-02 1927-12-02 Improvements relating to electro-magnetic acoustic devices, such as loud-speakers

Country Status (4)

Country Link
BE (1) BE356543A (enExample)
DE (1) DE583770C (enExample)
FR (1) FR36327E (enExample)
GB (1) GB307106A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113107587A (zh) * 2021-04-19 2021-07-13 太原理工大学 定向排布煤矸石骨料的煤矿胶结充填装置和充填方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113107587A (zh) * 2021-04-19 2021-07-13 太原理工大学 定向排布煤矸石骨料的煤矿胶结充填装置和充填方法

Also Published As

Publication number Publication date
FR36327E (fr) 1930-05-08
BE356543A (enExample) 1929-01-31
DE583770C (de) 1933-09-09

Similar Documents

Publication Publication Date Title
GB217192A (en) Improvements in and relating to electrodynamic telephones
GB307106A (en) Improvements relating to electro-magnetic acoustic devices, such as loud-speakers
GB212648A (en) Improvements in sound emitting apparatus, such as telephone receivers
GB445935A (en) An improved sound reproducing device
US2432424A (en) Electromagnetic sound translating device
GB334493A (en) Improvements in and relating to apparatus for producing sound
US1913318A (en) Electromagnetic vibrating device
US1642776A (en) Telephone receiver
US400325A (en) ginochio
US1718351A (en) Sound-reproducing apparatus
GB422479A (en) Improvements in or relating to loud speakers, telephones, and like apparatus
US479226A (en) The no
GB275161A (en) Improvements in and relating to loud speakers
GB251596A (en) Improvements in electromagnetic driving devices for use with sound reproducing apparatus
GB317169A (en) Improvements relating to the field magnets of microphones, loud speakers and the like
GB258000A (en) Improvements in telephone receivers and transmitters and the like electromagnetic instruments and the manufacture thereof
GB547728A (en) Improvements relating to electromagnetic telephone instruments
GB258414A (en) Improvements in or relating to telephonic receivers
GB319942A (en) Improvements relating to loud speaker telephone instruments
GB257203A (en) Improvements relating to electromagnetic sound reproducing apparatus
GB263478A (en) Loud speakers
GB226307A (en) Improvements in telephone receivers, loud speaking telephones and the like sound emitting devices
GB267243A (en) Improvements in magnetic vibratory devices
GB347345A (en) Improvements in or relating to gramophone pickups
GB311722A (en) Improvements in and relating to electro magnetic instruments for converting oscillating currents into sound and vice versa