Aperiodic low-pass filter

• US 3,380,004 A
• Filed: 01/29/1962
• Issued: 04/23/1968
• Est. Priority Date: 01/20/1959
• Status: Expired due to Term

• Current Assignee: Frithjof N. Hansen
• Original Assignee: Frithjof N. Hansen
• Inventors: Hansen, Frithjof N.
• Application Number:
  US04/177,131
• Time in Patent Office: 2,276 Days
• US Class Current: 333/184
• CPC Class Codes: H01F 1/00 Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
• CPC Class Codes: H03H 1/0007 of radio frequency interference filters

Claims

1. A LOW-PASS FILTER COMPRISING:

AN ELONGATED ELECTRICALLY CONDUCTIVE SLEEVE MEMBER, SAID SLEEVE MEMBER WHEN SAID FILTER IS IN OPERATION, BEING GROUNDED, A POWER CONDUCTOR EXTENDING LONGITUDINALLY OF SAID SLEEVE MEMBER, SAID CONDUCTOR BEING SPACED FROM AND ENCLOSED WITHIN SAID SLEEVE MEMBER, A QUANTITY OF LOSSY MAGNETIC MATERIAL SUBSTANTIALLY FILLING THE SPACE WITHIN SAID SLEEVE MEMBER, SAID LOSSY MATERIAL CONSISTING ESSENTIALLY OF A MIXTURE OF FINELY DIVIDED ELECTRICALLY CONDUCTIVE MAGNETIC MATERIAL AND A RESIN, THE ELECTRICAL CONDUCTIVITY OF SAID MIXTURE RENDERING SAID FILTER APERIODIC IN ITS PERFORMANCE, AND INSULATING MEANS INSULATING SAID CONDUCTOR ELECTRICALLY FROM SAID SLEEVE MEMBER, THE THICKNESS OF SAID INSULATING MEANS BEING OF THE ORDER OF NOT EXCEEDING THREE ONE-THOUSANDTHS OF AN INCH.