GB257317A - Improvements in or relating to devices for emitting or receiving sound - Google Patents

Improvements in or relating to devices for emitting or receiving sound

Info

Publication number
GB257317A
GB257317A GB1127925A GB1127925A GB257317A GB 257317 A GB257317 A GB 257317A GB 1127925 A GB1127925 A GB 1127925A GB 1127925 A GB1127925 A GB 1127925A GB 257317 A GB257317 A GB 257317A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
receiver
ring
diaphragms
loud
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
GB1127925A
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 GB1127925A priority Critical patent/GB257317A/en
Priority to FR614833D priority patent/FR614833A/en
Publication of GB257317A publication Critical patent/GB257317A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones

Landscapes

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

Abstract

257,317. McLachlan, N. W. April 30, 1925. Diaphragms; loud-speakers ; magnetic instruments. - Relates to devices for emitting or receiving sound, such as loud-speaking telephones, microphones, and gramophones provided wtih large diaphragms. According to the invention the diaphragm is constructed with a central part in the form of a straight or curved sided cone and an outer flat part, and is made of cloth, " doped " or impregnated with a substance such as a solution of celluloid. Means are provided for adjusting the tension of the diaphragm, and, in the application to a telephone, instrument, for resiliently mounting the receiver or transmitter, the vibrating member of which actuates or is actuated by the diaphragm. The Figure shows a loud-speaker, in which a " doped " cloth diaphragm D is secured peripherally between two wooden or metal rings C, E, screwed together. The ring C is channelled, and in it is located a ring F which bears on the diaphragm and can be adjustably drawn into the channel by means of screws P, so as to vary the tension of the diaphragm. The extent to which the diaphragm is doped may be graded, falling off to zero or a low value at the edge. After doping with celluloid solution, a coat of " aeroplane dope may be applied. The diaphragm may be insulated from its supporting rings, or from the tensioning ring, by felt &c. The electromagnetic receiver M is freely suspended from the rings C, E by adjustable springs. S, the natural frequency of which is low. When a receiver of the reed type is used, the reed is fixed to the apex of the diaphragm by a connecting piece of duralumin, brass, or steel. A silk front K is provided, which is glued to an outer ring R and serves as an additional support for the telephone receiver, being attached to a ring screwed to the receiver. A flat or curved. sound-reflector may be mounted adjacent to the diaphragm, and its position may be adjustable. A plurality of diaphragms, or a plurality of operating or actuated devices with interconnected vibrating systems may be employed each having a different natural frequency, and when two diaphragms are employed these may be arranged one within the other or arranged apex to apex.
GB1127925A 1925-04-30 1925-04-30 Improvements in or relating to devices for emitting or receiving sound Expired GB257317A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1127925A GB257317A (en) 1925-04-30 1925-04-30 Improvements in or relating to devices for emitting or receiving sound
FR614833D FR614833A (en) 1925-04-30 1926-04-21 Advanced training in sound generating and receiving devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1127925A GB257317A (en) 1925-04-30 1925-04-30 Improvements in or relating to devices for emitting or receiving sound

Publications (1)

Publication Number Publication Date
GB257317A true GB257317A (en) 1926-08-30

Family

ID=9983280

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1127925A Expired GB257317A (en) 1925-04-30 1925-04-30 Improvements in or relating to devices for emitting or receiving sound

Country Status (2)

Country Link
FR (1) FR614833A (en)
GB (1) GB257317A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744286C (en) * 1937-03-02 1944-01-13 Siemens Ag Membrane produced from pulp by dipping or pouring for electroacoustic devices

Also Published As

Publication number Publication date
FR614833A (en) 1926-12-23

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