公开(公告)号：US3609423A

公开(公告)日：1971-09-28

申请号：US3609423D

申请日：1970-06-25

Applicant: USM CORP

Inventor： SPRING WILLARD B ,  WOODWARD WALTER R

IPC: H02K41/06 ,  H02K7/00

CPC classification number: H02K41/06

Abstract: Magnetic material has a unique configuration to reduce reluctance and improve performance of stepping or synchronous motors of the type employing deflectable armatures. Specifically, for instance, to reduce or eliminate nonuniformity of peripheral airgap the outer convolution or a portion thereof of the magnetic strip has its thickness gradually diminishing towards its outer end and/or is provided, at the length of such convolution from its end, with a radial, widthwise extending projection of substantially the same dimension as the thickness of the material at that end. Alternatively, concentric bridging tubes may be employed. A longitudinal slit pattern may be used to reduce eddy currents.

公开(公告)号：US3869656A

公开(公告)日：1975-03-04

申请号：US27874272

申请日：1972-08-08

Applicant: USM CORP

Inventor： KENNEDY DANIEL W ,  WOODWARD WALTER R

IPC: H02P8/18 ,  H03K5/156 ,  G05B19/40

CPC classification number: H03K5/156 ,  H02P8/18

Abstract: A digital circuit for modifying a train of a finite number of pulses has, in a most direct approach, means for deleting selected pulses from the initial pulses of the train and from the final pulses of the train. The circuit has particular utility in driving stepping motors.

Abstract translation: 用于修改有限数量脉冲串的数字电路在最直接的方法中是用于从列车的初始脉冲和从列车的最终脉冲中删除所选择的脉冲的装置。 该电路特别适用于驱动步进电机。

公开(公告)号：US3548227A

公开(公告)日：1970-12-15

申请号：US3548227D

申请日：1969-04-03

Applicant: USM CORP

Inventor： WOODWARD WALTER R

IPC: F16H49/00 ,  H02K7/06 ,  H02K41/06 ,  H02K7/08

CPC classification number: H02K7/06 ,  F16H49/001 ,  H02K41/06