GB313406A - Method and apparatus for the electromagnetic reproduction of sound - Google Patents

Method and apparatus for the electromagnetic reproduction of sound

Info

Publication number
GB313406A
GB313406A GB17771/29A GB1777129A GB313406A GB 313406 A GB313406 A GB 313406A GB 17771/29 A GB17771/29 A GB 17771/29A GB 1777129 A GB1777129 A GB 1777129A GB 313406 A GB313406 A GB 313406A
Authority
GB
United Kingdom
Prior art keywords
armature
magnet
pole pieces
flux
magnetic
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
GB17771/29A
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.)
JAMES BERNARD FAGAN
Original Assignee
JAMES BERNARD FAGAN
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 JAMES BERNARD FAGAN filed Critical JAMES BERNARD FAGAN
Publication of GB313406A publication Critical patent/GB313406A/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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Percussion Or Vibration Massage (AREA)

Abstract

313,406. Fagan, J. B., (Assignee of Best, F. M.). June 9, 1928, [Convention date]. Magnetic instruments. - The armature is rigidly mounted relative to the magnet system so as to be incapable of free vibration or relative movement. A magnet M has pole pieces 1, 2 fitted with inwardly projecting members 3 - - 6, having coils C mounted thereon. The armature A has enlarged tapered ends, Fig. 4, and is rigidly attached to a block B by bar A<1>. A non- magnetic yoke Y, to which B is screwed at 14, is attached to the pole pieces 1, 2. The waves generated in the armature A by variations in the magnetic flux at its ends are transmitted to diaphragm D by rod 16. The leads L to coils C are taken from terminals 12 mounted on an insulating member 11 secured to one of the pole pieces. The pole-pieces, armature and yoke form a separate unit and can be removed from the magnet M as a unit. The varying flux at each end of the magnet can augment the existing flux at both ends, or can augment it at onei end and diminish it at the other end. Specification 257,599 is referred to.
GB17771/29A 1928-06-09 1929-06-10 Method and apparatus for the electromagnetic reproduction of sound Expired GB313406A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US284020A US2110193A (en) 1928-06-09 1928-06-09 Electromagnetic reproduction of sound and other wave motions

Publications (1)

Publication Number Publication Date
GB313406A true GB313406A (en) 1930-05-01

Family

ID=23088552

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17771/29A Expired GB313406A (en) 1928-06-09 1929-06-10 Method and apparatus for the electromagnetic reproduction of sound

Country Status (3)

Country Link
US (1) US2110193A (en)
FR (1) FR676389A (en)
GB (1) GB313406A (en)

Families Citing this family (2)

* 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
US3112375A (en) * 1960-01-20 1963-11-26 Mechanies For Electronic Inc Loudspeaker construction

Also Published As

Publication number Publication date
US2110193A (en) 1938-03-08
FR676389A (en) 1930-02-21

Similar Documents

Publication Publication Date Title
GB212648A (en) Improvements in sound emitting apparatus, such as telephone receivers
GB313406A (en) Method and apparatus for the electromagnetic reproduction of sound
GB334493A (en) Improvements in and relating to apparatus for producing sound
GB261698A (en) Improvements in sound reproducing apparatus
SU27104A1 (en) Electromagnetic system for recording and reproducing sounds
GB724978A (en) Polarised electromagnetic driving system
GB289804A (en) Improvements in or relating to magnet systems for converting electrical into acoustic oscillations and vice versa
GB324608A (en) Improvements relating to loud speakers
GB253080A (en) Telephone instrument
GB591204A (en) Improvements relating to electromagnetic telephone instruments
GB294060A (en) Improvements in or relating to the operation of loud speakers
GB283213A (en)
GB260286A (en) Improvements in electro-magnetic units for operating the diaphragm of sound reproducing devices
GB446135A (en) Improvements in and relating to electromagnetic time element devices
GB227560A (en) Improvements in telephone receivers and the like
GB295342A (en) Improvements in or relating to telephonic apparatus
GB211826A (en) Improvements in or relating to sound-reproducing devices, applicable also for recording telegraphic signals
GB315109A (en) Improvements relating to sound reproducing devices, such as loud speakers
GB267742A (en) Improvements in and relating to apparatus for transmitting or reproducing sound
GB294877A (en)
GB325354A (en) Electromagnetic sound reproducer
GB286719A (en) Improvements relating to electro-magnetic sound recorders and reproducers
GB336930A (en) Improvements relating to electro-magnetic units for acoustic instruments
GB291116A (en) Improvements in electromechanical vibrators
GB282279A (en) Improvements in electromagnetic speaker units