GB300837A - Improvements in and connected with sound reproducing instruments - Google Patents

Improvements in and connected with sound reproducing instruments

Info

Publication number
GB300837A
GB300837A GB427128A GB427128A GB300837A GB 300837 A GB300837 A GB 300837A GB 427128 A GB427128 A GB 427128A GB 427128 A GB427128 A GB 427128A GB 300837 A GB300837 A GB 300837A
Authority
GB
United Kingdom
Prior art keywords
magnet
diaphragm
instruments
sound
sound reproducing
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
GB427128A
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.)
EDWARD PATERSON
Original Assignee
EDWARD PATERSON
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 EDWARD PATERSON filed Critical EDWARD PATERSON
Priority to GB427128A priority Critical patent/GB300837A/en
Publication of GB300837A publication Critical patent/GB300837A/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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

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)

Abstract

300,837. Paterson, E. Feb. 10, 1928. Magnetic instruments. - Relates to sound-reproducing instruments, such as loud-speakers and telephones, of the type in which additional magnetic means are provided on the opposite side of the diaphragm from the usual electromagnetic means. According to the invention, a permanent magnet 7 is spaced above and located symmetrically opposite the centre of the diaphragm 5a, a passage communicating with the sound passage 5 being provided either through the magnet or wholly or partially surrounding it. As shown, the magnet is accommodated in an ebonite &c. casing 8 secured by screws 9 with distance-pieces 10 to the cap 4. Provision may be made for adjustment of the magnet 7 towards or away from the diaphragm.
GB427128A 1928-02-10 1928-02-10 Improvements in and connected with sound reproducing instruments Expired GB300837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB427128A GB300837A (en) 1928-02-10 1928-02-10 Improvements in and connected with sound reproducing instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB427128A GB300837A (en) 1928-02-10 1928-02-10 Improvements in and connected with sound reproducing instruments

Publications (1)

Publication Number Publication Date
GB300837A true GB300837A (en) 1928-11-22

Family

ID=9773956

Family Applications (1)

Application Number Title Priority Date Filing Date
GB427128A Expired GB300837A (en) 1928-02-10 1928-02-10 Improvements in and connected with sound reproducing instruments

Country Status (1)

Country Link
GB (1) GB300837A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015227A (en) * 1974-02-28 1977-03-29 Matsushita Electric Industrial Co., Ltd. Electromagnetic transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015227A (en) * 1974-02-28 1977-03-29 Matsushita Electric Industrial Co., Ltd. Electromagnetic transducer

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