公开(公告)号：US20140068954A1

公开(公告)日：2014-03-13

申请号：US13610239

申请日：2012-09-11

Applicant: TURKI AWWAD AL-DHAFIRI

Inventor： TURKI AWWAD AL-DHAFIRI

IPC: G01B3/08

CPC classification number: G01B3/08 ,  G01B3/26

Abstract: The cylindrical ruler is an elongated, hollow, cylindrical tube of known diameter having an axial slit extending the length of the tube. Indicia defining a circumferential scale are disposed around one end of the tube for measuring the length of an arc. Indicia defining a ruled scale extend lengthwise down the tube adjacent the slit for measuring length and width. Since the tube has a known diameter, it may be used to measure the inner or outer diameter of a pipe, the outer diameter or radius of curvature of a cylindrical lens, etc. The tube may also be used as a drawing tool to draw arcs, circles, or rectilinear lines on a cylindrical object. Preferably, the cylindrical ruler is furnished as a plurality of cylindrical tubes of progressively increasing diameter that can telescope within each other for storage and transport in a protective case.

Abstract translation: 圆柱形尺是具有已知直径的细长的中空的圆柱形管，其具有延伸管的长度的轴向狭缝。 限定圆周刻度的标记设置在管的一端以测量弧的长度。 用于测量长度和宽度，限定刻划尺的标记沿着与狭缝相邻的管子的长度方向向下延伸。 由于管具有已知的直径，所以可用于测量管的内径或外径，圆柱形透镜的外径或曲率半径等。管也可用作绘图工具来绘制弧 ，圆形或圆柱形物体上的直线。 优选地，圆柱形标尺被配置为可逐渐增大的直径的多个圆柱形管，其可彼此望远，以便在保护壳中进行存储和运输。