EP 0081780 B1 19861001 - ELECTRODYNAMIC TRANSDUCER
Title (en)
ELECTRODYNAMIC TRANSDUCER
Publication
Application
Priority
DK 547381 A 19811210
Abstract (en)
[origin: EP0081780A1] 1. Electrodynamic transducer comprising a diaphragm/moving-coil assembly (13, 15) which is held by a retaining ring (10) and a permanent-magnet assembly (5, 4, 3) fitted in a housing, in which the diaphragm (13) is provided with an aperture (29) for attenuating low frequencies, characterized in that a fixed pin (27, 28) projects into the aperture (29), that the pin (27, 28) has a circular cross section and that its diameter is slightly smaller than the diameter of the aperture (29).
IPC 1-7
IPC 8 full level
CPC (source: EP)
Designated contracting state (EPC)
BE CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0081780 A1 19830622; EP 0081780 B1 19861001; AU 556443 B2 19861106; AU 9113282 A 19830616; DE 3273600 D1 19861106; DK 148550 B 19850729; DK 148550 C 19860421; DK 547381 A 19830611; NZ 202625 A 19850816
DOCDB simple family (application)
EP 82111252 A 19821204; AU 9113282 A 19821206; DE 3273600 T 19821204; DK 547381 A 19811210; NZ 20262582 A 19821126