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
Resultados 6-10 de 22
Página 81
... inches wide and two feet long . Rule the proposed grade- line on it , assume a summit cut , mark the stations , and start down . When at fault , the elevation can be spotted on the profile , which will show at a glance , without any ...
... inches wide and two feet long . Rule the proposed grade- line on it , assume a summit cut , mark the stations , and start down . When at fault , the elevation can be spotted on the profile , which will show at a glance , without any ...
Página 84
... inch , semi - circu- lar horn protractor , upon which a series of twenty - three curves , from half a degree up to eight degrees , is finely engraved , with radii of 400 feet to an inch . After some years ' use in his own practice , the ...
... inch , semi - circu- lar horn protractor , upon which a series of twenty - three curves , from half a degree up to eight degrees , is finely engraved , with radii of 400 feet to an inch . After some years ' use in his own practice , the ...
Página 85
... inches , free from bubbles and cracks . Block it securely on the drawing - table with thumb - tacks , set- ting the ... inch . Now release the sheet , turn it over , and on its other face strike the remaining curves , down to ten minutes ...
... inches , free from bubbles and cracks . Block it securely on the drawing - table with thumb - tacks , set- ting the ... inch . Now release the sheet , turn it over , and on its other face strike the remaining curves , down to ten minutes ...
Página 131
... inches angle , 5 ° 44 ' ; gauge , 4.71 feet . = 0.42 feet ; frog Sin . S 0.4218 = .02334 = sin . 1 ° 20 . - 3 ° 32 ′ 4.29 0.0616 = - 69.64 feet . LO = ( G— D ) ÷ sin . † ( F + S ) = ( 4.71 -- 0.42 ) sin . R = ( GD ) ÷ ( nat . cos . Snat ...
... inches angle , 5 ° 44 ' ; gauge , 4.71 feet . = 0.42 feet ; frog Sin . S 0.4218 = .02334 = sin . 1 ° 20 . - 3 ° 32 ′ 4.29 0.0616 = - 69.64 feet . LO = ( G— D ) ÷ sin . † ( F + S ) = ( 4.71 -- 0.42 ) sin . R = ( GD ) ÷ ( nat . cos . Snat ...
Página 132
... inches , straight switch- rail , and 5 inches throw of switch . F - 8.6 L N L + 0.42 N ° The above may be written roundly as a rule thus : - - Multiply the length of switch - rail in feet by the number of the frog , and set down the ...
... inches , straight switch- rail , and 5 inches throw of switch . F - 8.6 L N L + 0.42 N ° The above may be written roundly as a rule thus : - - Multiply the length of switch - rail in feet by the number of the frog , and set down the ...
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