It is equal to half the angle which the chord subtends at the centre of the circle of which the curve is an arc, or if PC be a whole chord of 100 feet, half the degree of curve. The 'deflection angle A Treatise on Surveying - Página 591902Vista completa - Acerca de este libro
| William Wallace - 1837 - 248 páginas
...chord, viz. OM to PB, and ON to PA, and the angle which the diameters MM', NN' make at the centre is half the angle which the chord subtends at the centre of the generating circle ; for in the course of a revolution of the generating circle about the centre O,... | |
| Peter Nicholson - 1860 - 228 páginas
...4, having the inner edge of one limb made to the circular arc, and the other a straight tending to the centre of the circle, of which the curve is an arc. The arch-square No. 3 is for working the soffit, the bed being previously wrought ; or for working... | |
| Edward Atkins - 1874 - 426 páginas
...through his eye. 27. The angle between a tangent to a circle and the chord through the point of contact is equal to half the angle which the chord subtends at the centre. 2S. From a given point P, within or without a circle, draw a straight line cutting the circle in A... | |
| Institution of royal engineers - 1883 - 312 páginas
...are classified according to their radii of curvature ; in America, according to the angle which each chord subtends at the centre of the circle of which the curve forms part. This angle has been already shown to be double the tangential angle. Thus, in England,... | |
| 1902 - 366 páginas
...17, is that contained between the tangent PT, at any point P, and the chord PC, drawn from that po1nt to the next point C to be laid down. It is equal to...100 feet, half the degree of curve. The 'deflection angle1 DCE, fig. 17, is that contained Aagle ' i°' between the prolongation of a chord CD and the... | |
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