公开(公告)号：US3891475A

公开(公告)日：1975-06-24

申请号：US35446773

申请日：1973-04-25

Applicant: HITACHI LTD

Inventor： TOMITA SADAMI ,  CHIBA AKIO ,  MIYAJIMA GOH

IPC: C22C19/07 ,  C22C38/00 ,  C22C38/10 ,  H01F1/14 ,  H01F1/147 ,  C04B35/00

CPC classification number: C22C19/07 ,  C22C38/10 ,  H01F1/147

Abstract: A strong and uniform magnetic field is required at the magnetic gap of magnetic circuits in an analyzing apparatus such as a nuclear magnetic resonance apparatus. The addition of 0.15-0.5 percent carbon to a 35-55 percent co-containing iron-cobalt soft magnetic alloy which is used as a pole piece incorporated into the circuits can result in fine crystal structures without the strong magnetic performance harmed, so that a strong and uniform magnetic field is obtained.

Abstract translation: 在诸如核磁共振装置的分析装置中，在磁路的磁隙处需要强而均匀的磁场。 在35-55％的含钴铁磁软磁合金中加入0.15-0.5％的碳，作为结合在电路中的极片，可以产生精细的晶体结构，而没有强磁性能受损，因此， 得到强而均匀的磁场。

公开(公告)号：US3611223A

公开(公告)日：1971-10-05

申请号：US3611223D

申请日：1969-09-11

Applicant: HITACHI LTD

Inventor： UTSUMI YOSHIHARU ,  MIYAJIMA GOH

IPC: G01R33/383 ,  H01F7/20 ,  H01F3/00

CPC classification number: G01R33/383 ,  H01F7/202

Abstract: A magnetic apparatus comprising a rectangularly shaped yoke through which flux passes; a pair of magnetic poles for producing a strong unidirectional field therebetween; and a pole piece assembly comprising a pair of pole pieces and a supporting member provided with a pair of holes; the pole pieces being inserted into respective holes and fixed to the supporting member.