GB300620A - Improvements in loud-speaking telephones and like electro-acoustic devices - Google Patents

Improvements in loud-speaking telephones and like electro-acoustic devices

Info

Publication number
GB300620A
GB300620A GB10378/28A GB1037828A GB300620A GB 300620 A GB300620 A GB 300620A GB 10378/28 A GB10378/28 A GB 10378/28A GB 1037828 A GB1037828 A GB 1037828A GB 300620 A GB300620 A GB 300620A
Authority
GB
United Kingdom
Prior art keywords
loud
shunt
armature
electro
round
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
GB10378/28A
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.)
DUFF CHRISTIE LAW
Original Assignee
DUFF CHRISTIE LAW
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 DUFF CHRISTIE LAW filed Critical DUFF CHRISTIE LAW
Publication of GB300620A publication Critical patent/GB300620A/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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

300,620. KitsÚe, I., and Law, D. C. Nov. 18, 1927, [Convention date]. Loud-speakers ; magnetic instruments.-The permanent magnet 1 of a loud-speaker is provided with a magnetic shunt or keeper 2 made of laminated soft iron or the like and arranged in parallel with the poles 9. The diaphragm or like member is connected by a rod 5 with the pivoted armature 3. Current from a wireless receiver or the like is applied to a fixed coil 10 wound either round the shunt 2, Fig. 2, or round the armature, Fig. 1 (not shown). In addition two further coils 4, 11 surrounding the armature 3 and shunt 4 respectively, are connected in series to form a closed circuit. The wires forming adjacent coils as at 10, 11 are twisted together or otherwise intimately related to one another.
GB10378/28A 1927-11-18 1928-04-05 Improvements in loud-speaking telephones and like electro-acoustic devices Expired GB300620A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US300620XA 1927-11-18 1927-11-18

Publications (1)

Publication Number Publication Date
GB300620A true GB300620A (en) 1929-07-04

Family

ID=21852306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10378/28A Expired GB300620A (en) 1927-11-18 1928-04-05 Improvements in loud-speaking telephones and like electro-acoustic devices

Country Status (1)

Country Link
GB (1) GB300620A (en)

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