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 133
... switch - rail be curved , the formula would stand thus : F = 8.6 L N L + 0.84 N Which may be made a written rule as follows : - Multiply the length of switch - rail in feet by the number of the frog , and their product by 8 ; call the ...
... switch - rail be curved , the formula would stand thus : F = 8.6 L N L + 0.84 N Which may be made a written rule as follows : - Multiply the length of switch - rail in feet by the number of the frog , and their product by 8 ; call the ...
Página 134
... switch - rail reduced in like measure . For a metre gauge , take seven - tenths of the result , using a switch - rail reduced in like measure . Or these radii and distances may be found from the appended tables for standard gauge by pro ...
... switch - rail reduced in like measure . For a metre gauge , take seven - tenths of the result , using a switch - rail reduced in like measure . Or these radii and distances may be found from the appended tables for standard gauge by pro ...
Página 135
... Switch - rail , 24 ft Rad . outer rail . Do.angle , 1 ° 00 ' Mid . frog dist . Mid . frog angle . Main frog dist . TURNOUT TABLE . - SWITCH - RAILS , CURVED ;. TURNOUT TABLE . - SWITCH - RAILS , STRAIGHT ; GAUGE OF TRACK , 4 FEET 8 ...
... Switch - rail , 24 ft Rad . outer rail . Do.angle , 1 ° 00 ' Mid . frog dist . Mid . frog angle . Main frog dist . TURNOUT TABLE . - SWITCH - RAILS , CURVED ;. TURNOUT TABLE . - SWITCH - RAILS , STRAIGHT ; GAUGE OF TRACK , 4 FEET 8 ...
Página 136
... SWITCH - RAILS , CURVED ; GAUGE OF 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 ...
... SWITCH - RAILS , CURVED ; GAUGE OF 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 ...
Página 137
... rails of the main 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 ...
... rails of the main 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 ...
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