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公开(公告)号：US3599020A
公开(公告)日：1971-08-10
申请号：US3599020D
申请日：1970-02-27
Applicant: IBM
Inventor： HARRIS JOHN P , HU PAUL Y , NEWMAN ERNEST G
IPC: H02K41/035 , H02K41/02
CPC classification number: H02K41/0356
Abstract: A linear actuator having an axially movable tubular armature which is encircled by a first even numbered group of alternate magnetic poles and by a second even numbered but axially displaced group of alternate magnetic poles; the second group of poles alternate with each other and with the poles of the first group. The armature carries conductor segments adjacent to each of the poles. These conductor segments extend normal to the axial direction of armature movement. Current supply means is effective to cause currents to flow in the proper direction in each of the conductor segments such that the conductor segments jointly contribute to a composite force causing axial movement of the armature.
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公开(公告)号：US3571685A
公开(公告)日：1971-03-23
申请号：US3571685D
申请日：1968-01-15
Applicant: IBM
Inventor： AKINS VAUGHN E , HARRIS JOHN P , KOST FREDERICK H
IPC: G05D3/20 , G11B15/093 , G11B27/13 , G05B19/28
CPC classification number: G05D3/20 , G11B15/093 , G11B27/13
Abstract: The physical displacement of a movable medium is indicated by the content of a bidirectional counter. The counter is incremented or decremented by direction-oriented pulses relating to movement of the medium, these pulses being selectively gated into the counter. The content of the counter can control an operational amplifier to provide an indication of the position of the medium relative to a null point represented by any selected count in the counter.
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公开(公告)号：US3543068A
公开(公告)日：1970-11-24
申请号：US3543068D
申请日：1968-11-18
Applicant: IBM
Inventor： FISHER GENE A , GUZMAN ADOLFO M , HARRIS JOHN P , HU PAUL Y
CPC classification number: H01R39/39
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