Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1975-03-10
1977-08-16
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
148 39, H01F 300
Patent
active
040428982
ABSTRACT:
A pole piece for use in a magnet device and a method for manufacturing same, in which the structure of the pole piece for use in a magnet device used in an analyzing apparatus for analyzing such as nuclear magnetic resonance is varied in concentric fashion from the center towards the outer circumference of the pole piece. The pole piece is manufactured according to the die-forging, whereby the magnetic properties of the pole piece become hetrogenous in concentric fashion. The use of such a pole piece brings about a magnet device which is compact in size and which provides a strong and uniform magnetic field.
REFERENCES:
patent: 1767653 (1930-06-01), Davis
patent: 2777099 (1957-01-01), Foss
patent: 3118795 (1964-01-01), Kolbe et al.
Chiba Akio
Tomita Sadami
Harris George
Hitachi , Ltd.
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