GB1250640A - - Google Patents

Info

Publication number
GB1250640A
GB1250640A GB1250640DA GB1250640A GB 1250640 A GB1250640 A GB 1250640A GB 1250640D A GB1250640D A GB 1250640DA GB 1250640 A GB1250640 A GB 1250640A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
flat portion
periphery
trumpet shaped
dec
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
Other languages
English (en)
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 filed Critical
Publication of GB1250640A publication Critical patent/GB1250640A/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)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
GB1250640D 1967-12-30 1968-12-30 Expired GB1250640A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11074567 1967-12-30

Publications (1)

Publication Number Publication Date
GB1250640A true GB1250640A (fr) 1971-10-20

Family

ID=14543447

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1250640D Expired GB1250640A (fr) 1967-12-30 1968-12-30

Country Status (3)

Country Link
US (1) US3483946A (fr)
DE (1) DE1817432C3 (fr)
GB (1) GB1250640A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL142307B (nl) * 1968-12-30 1974-05-15 Bertagni Jose Juan Membraan voor een geluidsomzetinrichting, werkwijze voor het vervaardigen van een dergelijk membraan en luidspreker voorzien van een dergelijk membraan.
US7177440B2 (en) * 2002-12-31 2007-02-13 Step Technologies Inc. Electromagnetic transducer with asymmetric diaphragm

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180945A (en) * 1961-09-22 1965-04-27 Wm H Welsh Co Inc Loudspeaker
BE623239A (fr) * 1961-10-04
US3111189A (en) * 1962-01-12 1963-11-19 Theodore R Scholl Electrodynamic loudspeaker
US3247925A (en) * 1962-03-08 1966-04-26 Lord Corp Loudspeaker

Also Published As

Publication number Publication date
US3483946A (en) 1969-12-16
DE1817432A1 (de) 1969-07-10
DE1817432B2 (de) 1973-05-10
DE1817432C3 (de) 1973-11-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee