Abstract: A method of protecting an article of clothing with a napkin. The method includes the steps of (a) obtaining a napkin having (i) an area coated with a pressure sensitive adhesive on a first major surface of the napkin proximate the periphery of the napkin, (ii) a release liner overlaying the pressure sensitive adhesive, and (iii) an aperture through at least the pressure sensitive adhesive and the release liner configured and arranged to accommodate passage of a button therethrough, and (b) selectively securing the napkin to an article of clothing worn by a person by either (i) inserting a button affixed to the article of clothing through the aperture in the tab and through that area of the napkin overlying the aperture, or (ii) removing the release liner and adhesively securing the napkin to the article of clothing.

Abstract: A diaphragm type magnetic speaker with conductor runs on the diaphragm, the conductor runs having a multiplicity of conductors arranged in a band in each run which confronts portions of two magnetized strips with front faces of opposite polarity and the space between such magnetized strips. The width of the band of conductors exceeds the width of the space between adjacent magnet strips and traverses the entire transverse portions of both of the adjacent magnetized strips from which the magnetic field for the conductor run emanates.

Abstract: A planar diaphragm type magnetic transducer with magnetic circuit wherein the magnet strips on the soft iron plate and confronting the diaphragm are arranged in a sequence south, north, north, south, south, north, north, south, et seq. The magnet strips are spaced across the transducer and the metal plates on which the magnet strips lie are apertured to make the plates acoustically transparent. Conductors are grouped in runs on the diaphragm opposite alternate pairs of magnet strips which have magnetic poles of opposite polarity at their front faces.

Abstract: A planar diaphragm type magnetic transducer with an acoustically transparent magnetic backing, and a diaphragm overlying and spaced from the magnetic backing, the magnetic backing having magnetized strips lying parallel to each other and adjacent magnetized strips having opposite polarities at their faces confronting the diaphragm, the diaphragm being stiff and resisting flexing and connected by a flexible surround at its periphery.

Abstract: An audio frequency transducer having a ribbon tweeter with a multiplicity of side-by-side elongate strip-like magnets with elongate spaces therebetween, the confronting sides of the magnets having pole faces of opposite polarity to create intense magnetic fields therebetween, signal-carrying ribbon-like conductors in the intense magnetic field between adjacent magnets vibrating to produce sound output.

Abstract: An acoustical electromagnetic transducer as a loudspeaker and having a vibrating diaphragm with signal current carrying wires on the face thereof; a magnetic structure confronting the diaphragm in spaced relation and having a magnetic sheet metal plate and a plurality of permanent magnet strips on the panel and spaced from each other and along the runs of the conductor on the diaphragm, the permanent magnet strips being formed of a different magnetic material with a significantly different magnetic characteristic than the strips adjacent thereto.