Patent · US Expired

Electroacoustic transducer comprising a superconducting element

US4912086A · kind A · utility

5Cited by

5References

25Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Ulrich E. Enz · Eindhoven, NL
Albert Comberg · Aachen, DE
Norbert Hansen · Roetgen, DE

Key dates

Filing date	Nov 19, 1987
Grant date	Mar 27, 1990
Priority date	—
Expiry date	Nov 19, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S505/705
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An electroacoustic transducer comprises a terminal (1-1'), a voice coil (2) coupled to the terminal, and a diaphragm (4). The transducer further comprises an element (other than the voice coil) made of a superconducting material which cooperates with the voice coil (2) to provide electromechanical conversion of an electric signal appearing at the terminal (1-1') into vibrations of the diaphragm, or vice versa.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.