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US 3,937,905 AGranted
Moving voice coil transducer having a flat diaphragm of an impregnated knit
OwnerJosef W. Mangerinventor
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Abstract
An electro-acoustic transducer has a diaphragm with a moving coil. The diaphragm consists of a flat textile carrier impregnated with a highly attenuating filling material and is highly elastic in its plane but inelastic in bending.
Claims13
An electro-acoustic transducer system comprising:
- a magnetic system having pole shoes and an air gap limited by said pole shoes;
- a substantially flat viscoelastic diaphragm which is highly elastically stretchable;
- fixed support means fixed to said magnetic system and supporting said diaphragm;
- and
- moving coil means fixed to a portion of said diaphragm.
2 more elements
Dependencies are inferred from the claim text.