公开(公告)号：US3792532A

公开(公告)日：1974-02-19

申请号：US3792532D

申请日：1971-09-07

申请人： JESUS B DE

发明人： DE JESUS B

IPC分类号： B43L7/027 ,  B43L13/00 ,  B43L13/24

CPC分类号： B43L7/0275

摘要： The instrument has a generally triangular outline, but its acutely angled hypotenuse side is, in one version, notched to afford an upper inclined ruling edge portion for hatching, which angles upwardly and rectilinearly to an apex from a point of bottom intersection with a horizontal calibrated base portion; and the latter meets outwardly with a lower non-hatching ruling edge portion. The ruling portions parallel one another at the acute angularity of the hypotenuse side. The opposite 90* upright side of the triangle is notched somewhat differently at a calibrated horizontal base portion which connects between a lower vertical non-hatching portion and an upper vertical hatch or section line-ruling portion intersecting the inner end of the base portion at 90*. The base portions are calibrated in terms of conventional fractional inch spacings. In a second embodiment the ruling edge portions are along margins of elongated slots formed within the three rectilinear sides of the triangle, with appropriate linear calibrations of the sort mentioned above; and the instrument is used in the same general way. The instrument may be of one-piece construction, as in either of these versions, or it may be a plural-part unit including an elongated, endcalibrated base part which, in an extended position in one or another direction relative to a second triangular part, will outwardly intersect and overhang a hypotenuse or a 90* ruling edge of the triangular part at those ends, just as in the firstmentioned single part version. A third part pivotally mounted on the triangular part affords an optional protractor feature.

摘要翻译： 该仪器具有大致三角形的轮廓，但是在一个版本中，它的锐角斜边侧面具有切口以提供用于孵化的上倾斜刻边缘部分，其从与水平校准的底部交点的点向上并直线地向顶点倾斜 基部; 后者与较低的非阴影划分边缘部分向外相遇。 裁边部分在斜边的锐角处彼此平行。 三角形的相对的90°立式侧面在校准的水平基部处有些不同的缺口，该水平基部连接在下垂直的非阴影部分和与基部的内端相交的上垂直阴影线或截面线规定部分之间， DEG。 根据常规的分数英寸间距校准基部。 在第二实施例中，规则边缘部分沿着形成在三角形的三个直线侧边内的细长槽的边缘，具有上述类型的适当的线性校准; 仪器以相同的一般方式使用。 仪器可以是一体式结构，如在这些版本中的任一个中，或者它可以是多部分单元，其包括细长的端部校准基部，该基部相对于第二部分在一个或另一个方向上的延伸位置 三角形部分将在这些端部向外相交并伸出三角形部分的斜边或90°刻边，如前所述的单一部件版本。 旋转安装在三角形部分上的第三部分提供了可选的量角器特征。