GB336491A - Improvements in loud speakers, telephones for wireless and the like - Google Patents

Improvements in loud speakers, telephones for wireless and the like

Info

Publication number
GB336491A
GB336491A GB3728929A GB3728929A GB336491A GB 336491 A GB336491 A GB 336491A GB 3728929 A GB3728929 A GB 3728929A GB 3728929 A GB3728929 A GB 3728929A GB 336491 A GB336491 A GB 336491A
Authority
GB
United Kingdom
Prior art keywords
reed
pole pieces
pillar
slot
gap
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
GB3728929A
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 GB3728929A priority Critical patent/GB336491A/en
Publication of GB336491A publication Critical patent/GB336491A/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

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

336,491. Hunt, C. G. Dec. 5, 1929. Magnetic instruments. - An electromagnetic unit for loud-speakers, gramophone pick-ups, &c. comprises a reed so disposed in an angular gap between a pair of pole pieces that its longitudinal axis normally lies along a line bisecting the angle of the gap, the reed being secured at one end which projects through the narrower gap opening and having a free vibratory end projecting through the wider opening. The loud-speaker unit shown comprises a horseshoe magnet 1 carrying inclined pole pieces 2 surrounded by coils 3. If desired, aligned poles with angularly cut ends may be employed and the opposing inclined pole faces may be stepped. A reed 8 disposed between the pole pieces has one end secured by a slot and screw 9 to a pillar 7 carried by a base 5 whilst the free end of the reed is connected to a cone 11 by a rod 10. Rubber &c. buffers 11<a> are provided as shown to prevent the reed from touching the pole pieces. The outer ends of the pole pieces may be provided with slots 12 so that the pole pieces can be moved towards or away from the reed and at the same time be capable of angular movement. The length of the reed between the pillar 7 and the pole pieces can also be made adjustable by forming a slot 13 in the inner end of the reed, and, if desired, the whole of the pillar 7 may be made movable by providing a slot 14 in the base 5.
GB3728929A 1929-12-05 1929-12-05 Improvements in loud speakers, telephones for wireless and the like Expired GB336491A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3728929A GB336491A (en) 1929-12-05 1929-12-05 Improvements in loud speakers, telephones for wireless and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3728929A GB336491A (en) 1929-12-05 1929-12-05 Improvements in loud speakers, telephones for wireless and the like

Publications (1)

Publication Number Publication Date
GB336491A true GB336491A (en) 1930-10-16

Family

ID=10395277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3728929A Expired GB336491A (en) 1929-12-05 1929-12-05 Improvements in loud speakers, telephones for wireless and the like

Country Status (1)

Country Link
GB (1) GB336491A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062926A (en) * 1959-03-20 1962-11-06 John J Ronci Magnet with vibratable armature

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062926A (en) * 1959-03-20 1962-11-06 John J Ronci Magnet with vibratable armature

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