| 摘要 |
949,820. Ignition generators. ROBERT BOSCH G.m.b.H. Nov. 21, 1962 [Dec. 9, 1961], No. 44000/62. Heading H2A. Breakage of the sintered permanent magnet 14 mounted between an annular carrier 10 and pole shoe 11 of a magneto flywheel is prevented by clamping it wholly at the centre and thus eliminating bending stresses. The magnet is constructed to have a centre width l1 greater than edge width l2 and shaping it so that the outer radius is equal to or less than that of carrier 10 and the inner radius less than or equal to that of shoe 11 so that central clamping will be obtained regardless of the amount of shrinkage. In addition, improved magnetic characteristics are obtained. |
