Appeal No. 1999-1927
Application No. 08/499,367
Single remaining claim 3 is reproduced as follows:
3. In a motor, comprising:
a rotor;
at least two magnetic poles made of a magnetically inductive material
surrounded by a field winding and arranged to generate a magnetic field which, by
interaction with the rotor, causes the rotor to rotate; and
a casing consisting of two end casings made of a magnetically inductive
material for holding said rotor at axially opposed ends of the rotor and for retaining said
poles, said casing serving as a sole means of support for said poles and said rotor;
the improvement wherein each of said end casings is a C-shaped member
made of a magnetically inductive material which forms a means for providing a respective
axial magnetization path between said poles, one on each side of the poles, said
respective axial magnetization paths being the only magnetization paths between said
poles,
wherein said two magnetic poles are clamped between ends of said end
casings such that said poles extend transversely relative to said end casings, and
wherein said C-shaped members thereby form a means for exposing the
rotor in order to ventilate the rotor.
The examiner relies on the following references:
Perkins 1,822,859 Sep. 08, 1931
Kawada et al. (Kawada) 4,626,725 Dec. 02, 1986
Linders UK 17,732 Oct. 16, 1891
De La Riboisiere et al. UK 29,562 Dec. 22, 1913
(De La Riboisiere)
2
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