The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 1983
Filed:
May. 20, 1981
Kaj B Hansen, Horsens, DK;
International Standard Electric Corporation, New York, NY (US);
Abstract
In the method of making an electrodynamic transducer, the magnet part and the coil-diaphragm part are made in separate steps and are then assembled. The coil-diaphragm part is made in a plurality of successive stations; first a plane diaphragm material is adhered to one side of the carrier ring (10), and then a heat activatable glue is applied to the diaphragm in the region where the coil (15) is to be attached, and finally the diaphragm is formed with a heat emitting tool simultaneously with the coil (15) being pressed against the heat activated glue. The transducer has a diaphragm (13) connected to a coil (15) which is moveable in a slit (6) between the pole shoes (3, 4) of a magnet (5), the pole shoes (3, 4) being fitted coaxially on a guide pin (2). To provide for exact centering of the coil (15) in the slit (6), a carrier ring (10), to which the diaphragm (13) is secured so that the coil (15) is concentric with the carrier ring (10), engages an outwardly facing, annular face (12) of the outermost pole shoe (3).