GB518491A - Improvements in or relating to vibration translating devices such as loudspeakers orphonographic pick-ups - Google Patents

Improvements in or relating to vibration translating devices such as loudspeakers orphonographic pick-ups

Info

Publication number
GB518491A
GB518491A GB2434338A GB2434338A GB518491A GB 518491 A GB518491 A GB 518491A GB 2434338 A GB2434338 A GB 2434338A GB 2434338 A GB2434338 A GB 2434338A GB 518491 A GB518491 A GB 518491A
Authority
GB
United Kingdom
Prior art keywords
armature
gap
air
driving face
driving
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
GB2434338A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2434338A priority Critical patent/GB518491A/en
Publication of GB518491A publication Critical patent/GB518491A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00Transducers of moving-armature or moving-core type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

518,491. Loud-speakers ; gramophone pick-ups. EICHHORN, C. E. Aug. 18, 1938, No. 24343. [Class 40 (iv)] In a vibration translating device, such as a loudspeaker unit or a phonographic pick-up comprising a vibrating armature having a driving surface adjacent a magnetic air-gap, the driving faces of the armature and the magnetic air-gap are so constructed in relation to one another that the armature forms zones. which overlap the air-gap to different extents, for instance zones which are narrower than, of the same width as and of greater width than the air-gap, and which are distributed symmetrically over the entire extent of the driving face of the armature. As shown in Figs. 1, 3, an armature 1 of rectangular cross-section and of slightly greater width than the air-gap between the pole-pieces 7, 8 is formed at its driving face with oblique surfaces 2 formed by planes passing through the middle points of the sides and inclined at approximately 45 degrees to the plane of the air-gap. In modifications, Figs. 4 and 7, the gap-forming surfaces of the pole-pieces are of zig-zag or sinuous form, and in a further modification, Figs. 5, 11, the driving face of the armature is formed with circular recesses 12. The armature may be formed by a number of adjacent bars of which the ends are staggered on both sides of the central axis of the armature so that the driving face extends in a sinuous or zig-zag line. In one construction, Fig. 8, used. as a loud-speaker movement a sheet iron ring 13 is secured around the bars adjacent the driving face of the armature. Specification 383,879 is referred to.
GB2434338A 1938-08-18 1938-08-18 Improvements in or relating to vibration translating devices such as loudspeakers orphonographic pick-ups Expired GB518491A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2434338A GB518491A (en) 1938-08-18 1938-08-18 Improvements in or relating to vibration translating devices such as loudspeakers orphonographic pick-ups

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2434338A GB518491A (en) 1938-08-18 1938-08-18 Improvements in or relating to vibration translating devices such as loudspeakers orphonographic pick-ups

Publications (1)

Publication Number Publication Date
GB518491A true GB518491A (en) 1940-02-28

Family

ID=10210223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2434338A Expired GB518491A (en) 1938-08-18 1938-08-18 Improvements in or relating to vibration translating devices such as loudspeakers orphonographic pick-ups

Country Status (1)

Country Link
GB (1) GB518491A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108574920A (en) * 2018-06-26 2018-09-25 常州阿木奇声学科技有限公司 A kind of dynamic iron unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108574920A (en) * 2018-06-26 2018-09-25 常州阿木奇声学科技有限公司 A kind of dynamic iron unit
CN108574920B (en) * 2018-06-26 2024-03-29 常州阿木奇声学科技有限公司 Moving iron unit

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