×

Acoustic speaker device with a diaphragm having a spider web type core

  • US 4,817,165 A
  • Filed: 01/27/1987
  • Issued: 03/28/1989
  • Est. Priority Date: 01/27/1987
  • Status: Expired due to Fees
First Claim
Patent Images

1. An acoustic device comprising:

  • a diaphragm having an upper layer and a lower layer;

    a bobbin extending down through said lower layer and extending up to said upper layer;

    a bellows having a lower end extruding downwardly from an attachment of said bellows to said lower layer of said diaphragm;

    a frame having the lower end of said bellows attached thereto;

    a flexible surround connected to said frame and said diaphragm;

    a magnetic arrangement fastened to said frame provided with an upper pole piece and a lower pole piece;

    a voice coil on said bobbin juxtaposed in relation to said upper pole piece;

    said diaphragm including planar orbital ribs arranged about the center of the diaphragm in regular polygonal cross sections including concentrically disposed vertices on each polygonal cross section;

    radially oriented lateral planar ribs intersecting said vertices;

    said orbital ribs and said lateral ribs being situated completely between said upper layer and said lower layer of said diaphragm; and

    said bobbin being concentrically located an area void of said lateral ribs between two of said regular polygonal cross sections.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×