brushless alternator field coil and a method for assembling it
(specification, page 1, lines 5-6). The bobbin unit (figure
1, numeral 16) includes an iron core (figure 1, numeral 13) in
a
Appeal No. 1999-2248
Application No. 08/960,255
ring shape defining a center hole; a thin plate (figure 1,
numeral 14) in a ring shape attached to the iron core, having
a diameter at least as large as the diameter of the center
hole of the iron core and having a flange portion (figure 1,
numeral 14b) extending in the outward radial direction at one
end; a resinous bobbin (figure 1, numeral 15) inserted into
the cavity formed by the iron core and thin plate. The thin
plate is connected to the iron core by securing a distal end
of the thin plate opposite the flange portion to an end
surface of the iron core (specification, page 7, line 27,
through page 8, line 19).
Independent claims 1 and 7 are reproduced as follows:
1. A bobbin unit for a brushless alternator field coil,
comprising:
a ring-shaped iron core having a thick wall defining a
center hole, said thick wall delimited in an axial direction
of said center hole by a first surface at one end and a second
surface at another end opposite said first surface;
a plate which has a cylindrical portion and a flange
2
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