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 EngineerD. Van Nostrand Company, 1890 - 339 páginas |
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Página 25
... moved by gradual stress , not by pounding . They are a rude device . With so short a leverage as the length of the common adjust- manageable motion . They reproach the instrument - maker's art ing - pin supplies , it is almost ...
... moved by gradual stress , not by pounding . They are a rude device . With so short a leverage as the length of the common adjust- manageable motion . They reproach the instrument - maker's art ing - pin supplies , it is almost ...
Página 27
... move the instrument to C , and , sighting back to sta . 2 , let the rod standing on the pin read 2.64 . This makes the new instrument height " at C 201.41 , the height of sta . 2 , + 2.64 204.05 , and the elevations at 3 , 4 , 5 , or ...
... move the instrument to C , and , sighting back to sta . 2 , let the rod standing on the pin read 2.64 . This makes the new instrument height " at C 201.41 , the height of sta . 2 , + 2.64 204.05 , and the elevations at 3 , 4 , 5 , or ...
Página 35
... Move the instrument to B , say 22.5 feet above grade . This elevation , if the cutting on that side be deemed to equal it , corresponds to a distance out of 9 feet for road - bed added to ( 22.54 ) for slope ; total , 14.6 feet . The ...
... Move the instrument to B , say 22.5 feet above grade . This elevation , if the cutting on that side be deemed to equal it , corresponds to a distance out of 9 feet for road - bed added to ( 22.54 ) for slope ; total , 14.6 feet . The ...
Página 42
... moved slowly forward , the suc- cessive oppositions of the scale marks will indicate successive advances of the vernier , each equal to the one - thousandth part of a foot . The marginal example reads 6.217 = six feet , two - tenths ...
... moved slowly forward , the suc- cessive oppositions of the scale marks will indicate successive advances of the vernier , each equal to the one - thousandth part of a foot . The marginal example reads 6.217 = six feet , two - tenths ...
Página 43
... moved slowly half a degree on the limb , its several subdivision marks , one after an- other in arithmetical succession , will be seen to line with marks of the limb until the thirtieth is reached , when zero will be found to have ...
... moved slowly half a degree on the limb , its several subdivision marks , one after an- other in arithmetical succession , will be seen to line with marks of the limb until the thirtieth is reached , when zero will be found to have ...
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Términos y frases comunes
A. D. MIN adjustment apex distance backsight called central angle CHORD column Cosine 1 Sine cross-hair Cube Roots decimal deflection distance degree of curvature degree of curve Diff divided engineer equal error Example feet figure fixed FOOD foregoing formation slope frog angle gauge of track gauge side ground Hence inches index angle instrument height intersection angle located logarithm Main frog dist mantissa mark measure method metres metric curve middle frog middle ordinate middle point minutes multiplied natural sine number corresponding observation opposite outer rail parallel perpendicular plane triangle Polaris quotient radii radius range REVERSED CURVE rule Sine 1 Cotang Square Roots sub-chord subtended Subtract Suppose switch-rail Table XVI tabular tance Tang tangential angle tangential distance telescope terminal tangent tion toe of switch transitman Trigonometry turnout curve vernier vertical ΙΟ