公开(公告)号：US3687467A

公开(公告)日：1972-08-29

申请号：US3687467D

申请日：1970-05-01

Applicant: DIGITAL TELEPHONE SYSTEMS INC

Inventor： KOSMOWSKI WOJCIECH B

IPC: B23B31/14 ,  B23B31/20

CPC classification number: B23B31/201 ,  B23B31/14 ,  Y10T279/17957 ,  Y10T279/247

Abstract: This disclosure relates to machine tools such as drilling machines particularly adapted for drilling on printed circuit boards and the like. In particular, the disclosure is directed to improvements in centrifugally-activated collets for use with rotatable spindles employed in such drilling machines.

Abstract translation: 本公开涉及诸如特别适用于在印刷电路板等上钻孔的钻床的机床。 特别地，本公开涉及用于与在这种钻孔机中使用的可旋转主轴一起使用的离心致动夹头的改进。