The Field Engineer: A Handy Book of Practice in the Survey, Location, and Trackwork of Railroads; Containing ... Rules and Tables ... Applicable to ... the Standard and the Narrow Gauge ...D. van Nostrand, 1880 - 318 páginas |
Dentro del libro
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Página xiv
... switch to the frog points • 129 · • · XLIV . To shift a P. R. C. so that the terminal tangent shall merge in a given ... rail with main track . 130 To find the distance from toe of switch to point of main frog . · 130 To find the radius ...
... switch to the frog points • 129 · • · XLIV . To shift a P. R. C. so that the terminal tangent shall merge in a given ... rail with main track . 130 To find the distance from toe of switch to point of main frog . · 130 To find the radius ...
Página 129
... switch - rail for single turnout , D ; its angle with main track , S ; the gauge of the track , G ; and radius of outer rail , R. 2. Usually the length and throw of switch - rail and the angles of the frogs at O are given . In that case ...
... switch - rail for single turnout , D ; its angle with main track , S ; the gauge of the track , G ; and radius of outer rail , R. 2. Usually the length and throw of switch - rail and the angles of the frogs at O are given . In that case ...
Página 130
... switch - rail pro- longed and a tangent to turnout curve at frog point O , NOP N II W = = FS . The angle NOL or NLO , be- tween chord and tangent , = half the intersection angle HNW = = ( FS ) . The angle NOB = NOL + LOB . But NOL is ...
... switch - rail pro- longed and a tangent to turnout curve at frog point O , NOP N II W = = FS . The angle NOL or NLO , be- tween chord and tangent , = half the intersection angle HNW = = ( FS ) . The angle NOB = NOL + LOB . But NOL is ...
Página 131
... Rail of Turnout Curve . Subtract the throw of switch - rail from the gauge of track , both in decimals ; call the remainder a . cosine of the main frog angle from the switch - rail angle ; call the remainder b . quotient will be radius ...
... Rail of Turnout Curve . Subtract the throw of switch - rail from the gauge of track , both in decimals ; call the remainder a . cosine of the main frog angle from the switch - rail angle ; call the remainder b . quotient will be radius ...
Página 132
... switch - rail in feet ; F the distance from toe of outer switch - rail to point of frog in feet . Then , for standard gauge , 4 feet 8 inches , straight switch- rail , and 5 inches throw of switch . F - 8.6 L N L + 0.42 N ° The above ...
... switch - rail in feet ; F the distance from toe of outer switch - rail to point of frog in feet . Then , for standard gauge , 4 feet 8 inches , straight switch- rail , and 5 inches throw of switch . F - 8.6 L N L + 0.42 N ° The above ...
Otras ediciones - Ver todas
The Field Engineer: A Handy Book of Practice in the Survey, Location and ... William F. Shunk Sin vista previa disponible - 2008 |
The Field Engineer: A Handy Book of Practice in the Survey, Location, and ... William Findlay Shunk Sin vista previa disponible - 2017 |
Términos y frases comunes
100 feet long 100-feet chords adjustment apex distance called central angle column Cosine 1 Sine Cotang cross-hair Cube Roots decimals deflection distance degree of curvature DEGREE OF CURVE Diff divided elevation engineer equal Example feet figure fixed foregoing frog angle Full Gauge gauge of track gauge side gent ground index angle instrument intersection angle length of switch-rail located logarithm M.
M. I Sine Main frog dist mantissa mark measure method middle frog middle ordinate middle point minutes Multiply observation outer rail parallel perpendicular quotient radii radius range Reciprocals REVERSED CURVE right triangle screws slope Square Roots standard gauge straight line 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 vertical ΙΟ ΤΑΝ
Pasajes populares
Página 18 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
Página 4 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Página 11 - ... is supposed to be divided into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. Degrees, minutes, and seconds, are designated respectively, by the characters ° ' ". For example, ten degrees, eighteen minutes, and fourteen seconds, would be written 10° 18
Página 4 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers. log» MN = log» M + log