Title: Moving voice coil transducer having a flat diaphragm of an impregnated knit

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.

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Inventors: Manger, Josef W. (8725 Arnstein, DT)

Application Number: 382157
Filing Date: 1973-07-24
Publication_date: 1976-02-10
Assignee:
Primary Class(es): 381/421 181/161, 181/167, 381/401, 381/423
Other Classes:
US Patent Ref:

1552311	Sep, 1925	Kellogg	181/169.
1827283	Oct, 1931	De Forest	179/115.
1909275	May, 1933	Holland	179/115.
2115795	May, 1938	Warnke	179/117.
2216961	Oct, 1940	Sanial	179/117.
2534157	Dec, 1950	Zuerker	179/115.
2537253	Jan, 1951	Andersen	179/115.
2873813	Feb, 1959	Haerthe, Jr. et al.	179/181.
3790724	Feb, 1974	Schenkel	179/119.

Other Refs: 70,808406,7491,617521,988

Apr, 1950	DK
Mar, 1934	UK
May, 1926	AU
Mar, 1931	DD

Primary Examiner: Claffy, Kathleen H.
Assistant Examiner: Stellar, George G.
Attorney: