Roger William West
Land Surveyors in Salt Lake City, UT
License number
Utah 169859-9925
Issued Date
Jan 1, 1911
Expiration Date
Dec 31, 1999
Category
Engineer/Land Surveyor
Type
Engineer in Training - Obsolete
Address
Address
Salt Lake City, UT
Professional information
Electrostatic Loudspeaker Element
US Patent:
3935397, Jan 27, 1976
Filed:
Jan 28, 1974
Appl. No.:
5/436937
Inventors:
Roger A. West - Salt Lake City UT
Assignee:
Electronic Industries, Inc. - Minneapolis MN
International Classification:
H04R 1902
US Classification:
179111R
Abstract:
An electrostatic loudspeaker element including a diaphragm positioned between a pair of acoustically transparent wire grid electrode assemblies. In the preferred embodiment, each electrode assembly comprises a flat rectangular frame having a plurality of wire guiding slots on both sides. A wire whose diameter equals the depth of the slots is wound continuously around the frame in a helical pattern, and a dielectric spacer is adhesively attached to the frame across the slots to maintain the critical distance between the wire grid and the diaphragm. The frame is made of a material having a coefficient of thermal expansion equal to the wire.