 | William Shaffer Hall - Geometry, Descriptive - 1902 - 160 pages
...of points may be found. This spiral is frequently called the equiangular spiral, from the fact that the angle between any radius vector and the tangent to the curve at its extremity is constant. The logarithmic spiral is used in designing speed-pulleys, and for the outlines of spiral cams and... | |
 | Charles Westinghouse - Machine design - 1906 - 168 pages
...mean 63 proportional between them, that is, (AD)2= AOxAB. This spiral is called equiangular \>&cause the angle between any radius vector and the tangent...B and C are points in the spiral and the ratio of AO and AB be given, the intermediate point D may be obtained by describing a semicircle on BC as a... | |
 | William Shaffer Hall - Geometry, Descriptive - 1922 - 184 pages
...of points may be found. This spiral is frequently called the equiangular spiral, from the fact that the angle between any radius vector and the tangent to the curve at its extremity is constant. The logarithmic spiral is used in designing speed-pulleys, and for the outlines of spiral cams and... | |
| |
This spiral is frequently called the equiangular spiral, from the fact that the angle between any radius vector and the tangent to the curve at its extremity is constant. 