GB309555A - Improvements in and relating to sound producing devices - Google Patents

Improvements in and relating to sound producing devices

Info

Publication number
GB309555A
GB309555A GB11367/29A GB1136729A GB309555A GB 309555 A GB309555 A GB 309555A GB 11367/29 A GB11367/29 A GB 11367/29A GB 1136729 A GB1136729 A GB 1136729A GB 309555 A GB309555 A GB 309555A
Authority
GB
United Kingdom
Prior art keywords
cone
relating
attached
sound producing
producing devices
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
GB11367/29A
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
Publication of GB309555A publication Critical patent/GB309555A/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 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
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Electromagnetism (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

309,555. British Thomson-Houston Co., Ltd., (Assignees of Potter, W. B.). April 12, 1928, [Convention date]. Draphragms. - A conical paper diaphragm 10 for sound reproduction has flanged rings 15 of " Bristol board " or the like attached to its cuter surface, the flanges 16 oi which lie in planes perpendicular to the axis of the cone. The rings are preferably spaced progressively closer towards the periphery. The flange 13, of the peripheral ring 14, is used to support the cone which is inpulsed by a rod 12 attached to a metal ferrule 11, preferably of aluminium, and fixed to the apex of the cone.
GB11367/29A 1928-04-12 1929-04-12 Improvements in and relating to sound producing devices Expired GB309555A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US269519A US1754044A (en) 1928-04-12 1928-04-12 Sound-producing device

Publications (1)

Publication Number Publication Date
GB309555A true GB309555A (en) 1930-04-03

Family

ID=23027615

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11367/29A Expired GB309555A (en) 1928-04-12 1929-04-12 Improvements in and relating to sound producing devices

Country Status (3)

Country Link
US (1) US1754044A (en)
DE (1) DE601827C (en)
GB (1) GB309555A (en)

Also Published As

Publication number Publication date
US1754044A (en) 1930-04-08
DE601827C (en) 1934-08-25

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