EP 0152926 B1 19880622 - ELECTRODYNAMIC LOUDSPEAKER WITH OMNI-DIRECTIONAL SOUND RADIATIONS
Title (en)
ELECTRODYNAMIC LOUDSPEAKER WITH OMNI-DIRECTIONAL SOUND RADIATIONS
Publication
Application
Priority
DE 3405635 A 19840217
Abstract (en)
[origin: US4665550A] An electrodynamic loudspeaker for the high or mid-range sound region emits sound omnidirectionally. The loudspeaker comprises two identical individual loudspeakers arranged on opposite sides of a plane of mirror symmetry. Each loudspeaker has a drive unit with a permanent magnet fixed at a carrier part common to both sides and a moving coil means, including a winding and a bobbin, elastically held by a spider at carrier part. Each moving coil means is rigidly connected with a hemispherical membrane. The carrier part is formed as a ring and is limited by a spherical ring surface having a diameter which is somewhat smaller than twice the diameter of the outer rim of the membrane. The moving coil means has a diameter substantially the same as the outer edge of the membrane.
IPC 1-7
IPC 8 full level
H04R 1/34 (2006.01); H04R 1/40 (2006.01); H04R 9/06 (2006.01)
CPC (source: EP US)
H04R 1/403 (2013.01 - EP US); H04R 9/063 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0152926 A2 19850828; EP 0152926 A3 19850925; EP 0152926 B1 19880622; AT E35361 T1 19880715; DE 3405635 A1 19850822; DE 3563504 D1 19880728; JP H0732517 B2 19950410; JP S60242798 A 19851202; US 4665550 A 19870512
DOCDB simple family (application)
EP 85101658 A 19850215; AT 85101658 T 19850215; DE 3405635 A 19840217; DE 3563504 T 19850215; JP 2848585 A 19850218; US 70209085 A 19850215