Henry L Griffey

US Patent:

49980319, Mar 5, 1991

Filed:

Jan 23, 1989

Appl. No.:

7/299082

Inventors:

Henry L. Griffey - Loyall KY

International Classification:

H02K 706
H02K 3302
H02K 3304
H02K 710

US Classification:

310 37

Abstract:

A high torque AC stepping motor is provided. The motor includes a stator with six radially spaced coils. Spaced radially extending arms on an armature core are positioned adjacent the coils. The armature is mounted by a torsional shaft assembly including two concentric torque tubes. the torsional action of the tubes serves to return the armature to a home position after each current pulse. A one way sprag clutch is driven by the output shaft connected to the armature to turn an output gear or the like. A timer controls the AC power source to provide the precise rotary output. A system for precisely feeding webs of material for processing utilizing the stepping motor is also disclosed.