Spencer & Frank
Pulse motor
 In a pulse motor comprising a rotor, a drive coil excited by a predetermined drive current to drive the rotor, and a yoke for guiding a magnetic flux generated by the drive coil to a predetermined magnetic path; the yoke is provided with an aperture to restrict the flow path of an eddy current induced by the magnetic flux generated by the drive coil. 
Oki Electric Industry Co., Ltd.
H H H H
H02K H02K H02K H02K
inventional additional inventional inventional
Masayuki Tadashi Hiroshi Jiro
Ishikawa Kasai Kikuchi Tanuma