The Field Engineer: A Handy Book of Practice in the Survey, Location, and Track-work of Railroads : Containing a Large Collection of Rules and Tables, Original and Selected, Applicable to Both the Standard and the Narrow Gauge, and Prepared with Special Reference to the Wants of the Young EngineerVan Nostrand, 1882 - 6 páginas |
Dentro del libro
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Página 24
... screws at right angles to it on the telescope - barrel . Bring the spider - line again to coincide with the object by means of the levelling and tangent screws , and , if necessary , repeat the operation . Proceed in the same man- ner ...
... screws at right angles to it on the telescope - barrel . Bring the spider - line again to coincide with the object by means of the levelling and tangent screws , and , if necessary , repeat the operation . Proceed in the same man- ner ...
Página 25
... screws securing the inner end of the eye - piece . TO BRING THE LEVEL BUBBLE PARALLEL WITH THE TELE- SCOPE AXIS . 5. Clamp the instrument over either pair of levelling screws , and bring the bubble to the middle of its tube . Turn the ...
... screws securing the inner end of the eye - piece . TO BRING THE LEVEL BUBBLE PARALLEL WITH THE TELE- SCOPE AXIS . 5. Clamp the instrument over either pair of levelling screws , and bring the bubble to the middle of its tube . Turn the ...
Página 40
... screws attached to the tubes , and one - half with the levelling screws . Repeat until the ad- justment is perfect . 3. TO ADJUST THE VERTICAL HAIR SO THAT IT SHALL RE- VOLVE IN A PLANE , AND MARK BACKSIGHT AND FORE- SIGHT POINTS IN THE ...
... screws attached to the tubes , and one - half with the levelling screws . Repeat until the ad- justment is perfect . 3. TO ADJUST THE VERTICAL HAIR SO THAT IT SHALL RE- VOLVE IN A PLANE , AND MARK BACKSIGHT AND FORE- SIGHT POINTS IN THE ...
Contenido
Definitions and principles | 3 |
Definitions | 11 |
ADJUSTMENT AND USE OF INSTRUMENTS | 21 |
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Otras ediciones - Ver todas
The Field Engineer: A Handy Book of Practice in the Survey, Location, and ... William Findlay Shunk Sin vista previa disponible - 2015 |
The Field Engineer, a Handy Book of Practice in the Survey, Location, and ... William Findlay Shunk Sin vista previa disponible - 2016 |
Términos y frases comunes
100 feet long 100-feet chords called central angle chord 100 feet column cross-hair Cube Roots decimals deflection angle deflection distance degree of curvature degree of curve Diff divided elevation engineer equal Example feet 8 inches figure find the radius fixed foregoing frog angle Full Gauge gauge of track gauge side grade ground Hypsometry index angle instrument intersection angle length of switch-rail located logarithm magnetic bear Main frog dist main track mantissa mark measure method middle frog middle ordinate middle point minutes Multiply outer rail parallel perpendicular quotient radii radius REVERSED CURVE screws Sine 1 Cotang Square Roots stake standard gauge 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 ΙΟ ΤΑΝ