专利名称：Electric actuators
发明人：David J. Wickham,Jack Washbourn,Howard F.
Cogan
申请号：US06/607631申请日：19840507公开号：US04546295A公开日：19851008
摘要：The present invention provides an electric actuator having an output membermovable from a first variable position to a second variable position; an electric motoroperable to control a spring system to exert an output force on the output memberwhen in its second position; a device for generating an electrical signal when the outputmember is about to leave the second position as it returns to the first position; and amotor-control electrical circuit which recognizes the generation of the electrical signaland thereafter operates the electric motor to a pre- determined degree to move theoutput member a corresponding pre- determined distance back to the first position sothat there is preserved a substantially constant distance between the first and secondpositions.
申请人：WESTINGHOUSE BRAKE & SIGNAL
代理机构：Larson and Taylor
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