Vitreous coated magnetic material

• US 2,877,144 A
• Filed: 05/19/1954
• Issued: 03/10/1959
• Est. Priority Date: 05/19/1954
• Status: Expired due to Term

• Current Assignee: Arthur H. Iversen
• Original Assignee: Arthur H. Iversen
• Inventors: Iversen, Arthur H.
• Application Number:
  US03/430,841
• Time in Patent Office: 1,756 Days
• US Class Current: 428/212
• CPC Class Codes: C23D 5/00 Coating with enamels or vitreous layers
• CPC Class Codes: H01F 1/0315 Ferrites
• CPC Class Codes: Y10S 428/90 Magnetic feature
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree

Claims

1. A DEVICE COMPRISING AN ELEMENT COMPOSED OF A POROUS FERROMAGNETIC DIELECTRIC CERAMIC, SID ELEMENT HAVING PREDETERMINED PHYSICAL CHARACTERISTICS;

A SINTERED LAYER OF A FIRST TYPE OF GALSS COVERING TRHE EXPOSED SURFACE OF SAID ELEMENT, SAID FIRST RYPE OF GLASS HAVING A PREDETERMINED WORKING TEMPERATURE;

AND ACOATING OF A SECOND TYPE OF GLASS DISPOSED ON TOP OF SAID SINTERED LAYER, THE WORKING TEMPERATURE OF SAID SECOND TYPE OF GLASS BEING MORE THAN 80*C. LOWER THAN SAID PREDETERMINED WORKING TEMPERATURE, AND SAID FIRST AND SECOND TYPES OF GLASSES HAVING THERMAL COEFFICIENTS OF EXPANSION OF FROM 65 TO 120X10-7 INCH PER INCH PER DEGREE CENTIGRADE, WHEREBY SAID FIRST AND SECOND TYPES OF GLASS PROVIDE A SEAL HAVING PHYSICAL CHARACTERISTICS SUBSTANTIALLY EQUIVALENT TO SAID PREDETERMINED PHYSICAL CHARACTERISTICS OF THE FERRITE ELEMENT.