专利名称：Clutching arrangement for a sewing machine
bobbin
发明人：Charles R. Odermann,Robert H. Larsen申请号：US06/505009申请日：19830616公开号：US04481897A公开日：19841113
摘要：A clutch which is engaged to rotate and wind thread on a sewing machinebobbin is provided with clutch parts that include a single bladed paddle, and a memberwith a pair of crossed paddle receiving through slots, one of which has a chamfered upperedge that substantially widens the mouth of the slot and the other of which is withoutsuch chamfered edge.
申请人：THE SINGER COMPANY
代理人：William V. Ebs,Robert E. Smith,Edward L. Bell
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