The Field Engineer: A Handy Book of Practice in the Survey, Location, and Track-work of Railroads : Containing a Large Collection of Rules and Tables, Original and Selected, Applicable to Both the Standard and the Narrow Gauge, and Prepared with Special Reference to the Wants of the Young EngineerVan Nostrand, 1882 - 6 páginas |
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Página 42
... VERNIER . 1. The vernier in the transit is a short graduated arc , movable around the graduated circle of the instrument , by means of which subdivisions of the circle graduation can be read . There are many varieties of the ver- nier ...
... VERNIER . 1. The vernier in the transit is a short graduated arc , movable around the graduated circle of the instrument , by means of which subdivisions of the circle graduation can be read . There are many varieties of the ver- nier ...
Página 43
... vernier , together with a part of the graduated circle . The vernier is a double one , for con- venience in reading angles right or left . It will be observed that a space , equal to twenty - nine half degrees on the limb , is laid off ...
... vernier , together with a part of the graduated circle . The vernier is a double one , for con- venience in reading angles right or left . It will be observed that a space , equal to twenty - nine half degrees on the limb , is laid off ...
Página 71
... vernier reading 10 ° left . 20 ° right . Vernier will now read 10 ° right , and telescope will be in line C E. Make CE 200 feet . Move to E. See that vernier still reads 10 ° right . BS to C , and turn 10 ° left . Ver- nier will now ...
... vernier reading 10 ° left . 20 ° right . Vernier will now read 10 ° right , and telescope will be in line C E. Make CE 200 feet . Move to E. See that vernier still reads 10 ° right . BS to C , and turn 10 ° left . Ver- nier will now ...
Contenido
Definitions and principles | 3 |
Definitions | 11 |
ADJUSTMENT AND USE OF INSTRUMENTS | 21 |
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The Field Engineer: A Handy Book of Practice in the Survey, Location, and ... William Findlay Shunk Sin vista previa disponible - 2015 |
The Field Engineer, a Handy Book of Practice in the Survey, Location, and ... William Findlay Shunk Sin vista previa disponible - 2016 |
Términos y frases comunes
100 feet long 100-feet chords called central angle chord 100 feet column cross-hair Cube Roots decimals deflection angle deflection distance degree of curvature degree of curve Diff divided elevation engineer equal Example feet 8 inches figure find the radius fixed foregoing frog angle Full Gauge gauge of track gauge side grade ground Hypsometry index angle instrument intersection angle length of switch-rail located logarithm magnetic bear Main frog dist main track mantissa mark measure method middle frog middle ordinate middle point minutes Multiply outer rail parallel perpendicular quotient radii radius REVERSED CURVE screws Sine 1 Cotang Square Roots stake standard gauge sub-chord subtended Subtract Suppose Table XVI tabular tance Tang tangent A B tangential angle tangential distance telescope terminal tangent tion toe of switch Trigonometry turnout curve vernier versin ΙΟ ΤΑΝ