Coal Miners' Pocketbook: Formerly The Coal and Metal Miners' Pocketbook; Principles, Rules, Formulas and TablesMcGraw-Hill Book Company, Incorporated, 1916 - 1172 páginas |
Dentro del libro
Resultados 1-5 de 99
Página ix
... Track , 129 ; Turnout From the Inner Side of a Curved Track , 130 ; Connecting Curves , 130 ; Cross - Overs , 130 ; Cross - Over Between Two Parallel Straight Tracks , 130 ; Another Form , 131 ; Laying Out Turnouts , 131 ; To Lay Out a ...
... Track , 129 ; Turnout From the Inner Side of a Curved Track , 130 ; Connecting Curves , 130 ; Cross - Overs , 130 ; Cross - Over Between Two Parallel Straight Tracks , 130 ; Another Form , 131 ; Laying Out Turnouts , 131 ; To Lay Out a ...
Página xxi
... Track , 765 ; Rails , 766 ; Weight of Rails , in Tons of 2,240 Lb. , Required to Lay 1,000 Ft . Single Track , Table , 768 ; Ties , 768 ; Sizes and Quan- tities of Spikes , Table , 769 ; Number of Track Bolts in a Keg of 200 Lb. , Table ...
... Track , 765 ; Rails , 766 ; Weight of Rails , in Tons of 2,240 Lb. , Required to Lay 1,000 Ft . Single Track , Table , 768 ; Ties , 768 ; Sizes and Quan- tities of Spikes , Table , 769 ; Number of Track Bolts in a Keg of 200 Lb. , Table ...
Página 84
... track . Stations in collars are less liable to be shifted than those in the track , but as the pressure due to mining operations comes upon the timbers they , too , are apt to be shifted out of line . Sometimes stations that must be set ...
... track . Stations in collars are less liable to be shifted than those in the track , but as the pressure due to mining operations comes upon the timbers they , too , are apt to be shifted out of line . Sometimes stations that must be set ...
Página 90
... track ; this is inaccurate , as the track may be shifted or the grade changed in making repairs , or to take out a sag . Whenever a level survey is begun the distance between roof and floor should be measured to see if it agrees with ...
... track ; this is inaccurate , as the track may be shifted or the grade changed in making repairs , or to take out a sag . Whenever a level survey is begun the distance between roof and floor should be measured to see if it agrees with ...
Página 113
... track when no transit is available . By measuring the middle ordinate of any con- venient chord , the degree of the curve can be calculated from the relative values of the ordinate and chord . As the track is likely not to be in perfect ...
... track when no transit is available . By measuring the middle ordinate of any con- venient chord , the degree of the curve can be calculated from the relative values of the ordinate and chord . As the track is likely not to be in perfect ...
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Otras ediciones - Ver todas
Coal Miners' Pocketbook, Formerly the Coal and Metal Miners' Pocketbook ... Thomas J. Foster Sin vista previa disponible - 2012 |
Términos y frases comunes
amount angle anthracite armature average beam bending bituminous coal boiler bottom British thermal units carbon cars cement center of gravity circuit coal coke column combustion compression concrete cubic curve cylinder diameter distance drill driven electromotive force elevation engine entry equal factor of safety feet formula friction frog fuel gauge given grade haulage head heat hoisting rope holes horizontal horsepower Inches iron length lime load lubrication mantissa material mean effective pressure measured method mines mixture moment of inertia mortar motor obtained pillars pipe piston placed plumb-bob Portland cement Pounds pressure pulley pump radius rail resistance sand seam shaft shear sheaves shown in Fig side slope specific gravity square station steam steel strands strength stress surface switch tangent temperature tests thickness timber track usually valve vertical weight wire
Pasajes populares
Página 3 - SQUARE MEASURE 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet — 1 square yard (sq.
Página 456 - Z is the space between the piston and the cylinder head (when the piston is at the end of the stroke), toi,-i 8 gether with the volume of the steam ports.
Página 412 - Pi = pressure of steam at discharge, in pounds per square inch; L = length of pipe, in feet; d = diameter of pipe, in inches. In...
Página 204 - This term is applied to the finely pulverized product resulting from the calcination to incipient fusion of an intimate mixture of properly proportioned argillaceous and calcareous materials, and to which no addition greater than 3 per cent has been made subsequent to calcination.
Página 6 - Cubic Measure 1728 cubic inches (cu. in.) =1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...
Página 34 - Rule. — Divide the logarithm of the number by the index of the root; the result will be the logarithm of the root.
Página 36 - If two triangles have two sides, and the included angle of the one equal to two sides and the included angle of the other, each to each, the two triangles are equal in all respects.
Página 149 - The power multiplied by the distance through which it moves is equal to the weight multiplied by the distance through which it moves. Thus, 20 Ib.
Página 37 - The sum of the interior angles of a polygon is equal to twice as many right angles as the polygon has sides, less four right angles.
Página 303 - The pressure of a liquid on any surface immersed in it is equal to the weight of a column of the liquid whose base is the surface pressed, and whose height is the perpendicular depth of the center of gravity of the surface below the surface of the liquid.