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
Página 131
... 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 . Subtract the natural natural cosine of the Divide a by b : the 12. To find ...
... 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 . Subtract the natural natural cosine of the Divide a by b : the 12. To find ...
Página 133
... track , proceed thus : - First find the radius as for a turnout from straight track by the preceding rule ; call it , as before , R. Call the radius of the main track R2 , and the required radius of turnout curve r . Then , if the ...
... track , proceed thus : - First find the radius as for a turnout from straight track by the preceding rule ; call it , as before , R. Call the radius of the main track R2 , and the required radius of turnout curve r . Then , if the ...
Página 135
... TRACK , 4 FEET 8 INCHES ; THROW OF SWITCH- RAIL , 5 INCHES . Switch - rail , 12 ft Do.angle , 2 ° 00 ' Main frog dist . Rad . outer rail . Mid . frog dist . Mid . frog angle . Main frog dist . Switch - rail , 16 ft Rad . outer rail . Do ...
... TRACK , 4 FEET 8 INCHES ; THROW OF SWITCH- RAIL , 5 INCHES . Switch - rail , 12 ft Do.angle , 2 ° 00 ' Main frog dist . Rad . outer rail . Mid . frog dist . Mid . frog angle . Main frog dist . Switch - rail , 16 ft Rad . outer rail . Do ...
Página 136
... TRACK , 4 FEET 8 INCHES ; THROW OF SWITCH- RAIL , 5 INCHES . L'gth . 12 ft . Ang . 4 ° 00 ' . Rad . 171.9 . | Switch - rail , L'gth . 16 ft . Ang . 3 ° 00 ' . Rad . 312.7 . Main frog dist . Rad . outer rail . Mid . frog dist . Mid ...
... TRACK , 4 FEET 8 INCHES ; THROW OF SWITCH- RAIL , 5 INCHES . L'gth . 12 ft . Ang . 4 ° 00 ' . Rad . 171.9 . | Switch - rail , L'gth . 16 ft . Ang . 3 ° 00 ' . Rad . 312.7 . Main frog dist . Rad . outer rail . Mid . frog dist . Mid ...
Página 137
... track . B C F A M K X 2. Stick a pin or drive a spike at A , the toe of switch , at a distance from the gauge side of the main - track rail equal to the throw of the switch - rail . Lay off the distances AC and AB ( if a double turnout ) ...
... track . B C F A M K X 2. Stick a pin or drive a spike at A , the toe of switch , at a distance from the gauge side of the main - track rail equal to the throw of the switch - rail . Lay off the distances AC and AB ( if a double turnout ) ...
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