EP 0667730 B1 20070103 - Electrodynamic transducer of polar type with vibratory body
Title (en)
Electrodynamic transducer of polar type with vibratory body
Title (de)
Elektrodynamischer Wandler polarer Art mit Schwingkörper
Title (fr)
Transducteur électrodynamique de type polaire avec corps vibrant
Publication
Application
Priority
IT BZ940007 A 19940214
Abstract (en)
[origin: EP0667730A1] The chassis of the convertor is provided with pole shoes between which there is provided a ring permanent magnet (13). The insides of the pole shoes form an air gap (5, 16) in which an exciting coil (7, 17) can move in a straight line. The vibrating body (8, 18) sits on the exciting coil (7, 17). The vibrating body (8, 18) tapers in a direction away from the coils (7, 17) to form a point. The base of the conical vibrating body (8, 18) is fixedly connected to the coil (7. 17). Two such convertors can be combined in a mirror arrangement such that the points of the respective vibrating bodies (8, 18) are at a predetermined distance from each other and they oscillate along their axes (12) under the effect of a signal current providing a suction effect and hence a toroidal radiating system with a 360 degree circular characteristic.
IPC 8 full level
H04R 1/34 (2006.01); H04R 1/40 (2006.01); H04R 7/12 (2006.01); H04R 27/00 (2006.01)
CPC (source: EP)
H04R 1/345 (2013.01); H04R 1/403 (2013.01); H04R 7/127 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR LI NL SE
DOCDB simple family (publication)
EP 0667730 A1 19950816; EP 0667730 B1 20070103; AT E350877 T1 20070115; DE 59511076 D1 20070215; ES 2280080 T3 20070901; IT 1276265 B1 19971028; IT BZ940007 A0 19940214; IT BZ940007 A1 19950814; JP H07312793 A 19951128
DOCDB simple family (application)
EP 95200332 A 19950211; AT 95200332 T 19950211; DE 59511076 T 19950211; ES 95200332 T 19950211; IT BZ940007 A 19940214; JP 5961395 A 19950213