Universal precision sine bar attachment

专利名称：Universal precision sine bar attachment发明人：Franklin D. Mann申请号：US07/165943申请日：19880309公开号：US04809441A公开日：19890307

摘要：An improved sine bar apparatus for the precise measurement of angles formachining operation. The sine bar apparatus comprises a flat, rectangular base which hasan upper and a lower surface with four sides. A collet adapter extends from one side ofthe base at right angles thereto in a plane which is parallel to the upper surface of thebase and there is at least one slot extending transversely of one side of the base. Areference bar is attached to one of the other sides of the base and has a support surfacewhich extends above the upper surface of the base. An elongated, generally rectangularsine bar, which has a reference surface extending along one side, is pivotally connected tothe base and is supported on the upper surface of the base. The sine bar is pivotallyconnected at a point intermediate its ends, though the transverse slot adjacent the sideof which the reference bar is attached, and has one of its ends in contact with the supportsurface of the reference bar. The other end of the sine bar is separated from the supportsurface of the reference bar by means of a plurality of gauges or gauge blocks which areprecisely machined to cause the reference surface of the sine bar to form a

predetermined angle with the longitudinal axis of the collet adapter. The reference barand the sine bar can be attached to either of the three sides of the base to provide avariation in the angles measured.

申请人：THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOROF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

代理人：William J. Sheehan,John R. Manning,Charles E. B. Glenn

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