专利内容由知识产权出版社提供
专利名称：Drawworks control apparatus发明人：T. Edward Martin申请号：US05/638836申请日：19751208公开号：US04046355A公开日：19770906
摘要：A control apparatus for use with a drawworks assembly having a work piecesuspended from, and applying tension to, a cable, one end of the cable being wound on adrum, the rotation of which is controlled by a power brake mechanism, the controlapparatus comprising a cable tension sensor producing a tension signal proportional tothe tension in the cable, a pulse generator producing a pulsed control signal and a brakecontrol applying the tension signal to the power brake mechanism in response to thecontrol signal.
申请人：MARTIN; T. EDWARD
代理机构：Dunlap, Codding & McCarthy
更多信息请下载全文后查看