The Modern Mechanic: A Scientific and Calculator, Comprising Rules and Tables in the Various Departments of Mechanical Skill and LaborBradley, Dayton, 1861 - 305 σελίδες |
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Σελίδα 121
... resistance to be overcome ; and the power is the force em ployed to overcome that resistance , or move that body They are frequently represented by the first letters of their names , W and P. THE LEVER . 4. A LEVER is an inflexible bar ...
... resistance to be overcome ; and the power is the force em ployed to overcome that resistance , or move that body They are frequently represented by the first letters of their names , W and P. THE LEVER . 4. A LEVER is an inflexible bar ...
Σελίδα 134
... resistance arising from one body rubbing against another- r - a subject which will be discussed hereafter . The ... resistances , and this must be done at the expense of time ; or , to generate rapid velocities , as in turning - lathes ...
... resistance arising from one body rubbing against another- r - a subject which will be discussed hereafter . The ... resistances , and this must be done at the expense of time ; or , to generate rapid velocities , as in turning - lathes ...
Σελίδα 135
... resistance or force which must be exerted , to prevent a given body from obeying the law of gravity . 4. To find the centre of gravity of any plane figure , me- chanically Suspend the figure by any point near its edge , and mark the ...
... resistance or force which must be exerted , to prevent a given body from obeying the law of gravity . 4. To find the centre of gravity of any plane figure , me- chanically Suspend the figure by any point near its edge , and mark the ...
Σελίδα 148
... Resistance to Tension , or Absolute strength . 2d . They may be crushed or compressed in the direction of their length , as in the case of columns , truss beams , & c . 3d . They may be broken across , as in the case of joists , rafters ...
... Resistance to Tension , or Absolute strength . 2d . They may be crushed or compressed in the direction of their length , as in the case of columns , truss beams , & c . 3d . They may be broken across , as in the case of joists , rafters ...
Σελίδα 171
... resistance will be diffused over a greater number . The power acting at the rim × length of arm3 number of arms X 2656 × 0.1 and cube of depth . = breadth Ex . - If the force acting at the extremity of the arm of a wheel be 16 cwt ...
... resistance will be diffused over a greater number . The power acting at the rim × length of arm3 number of arms X 2656 × 0.1 and cube of depth . = breadth Ex . - If the force acting at the extremity of the arm of a wheel be 16 cwt ...
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The Modern Mechanic: A Scientific and Calculator, Comprising Rules and ... William Grier Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
The Modern Mechanic: A Scientific Guide and Calculator, Comprising Rules and ... William Grier Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2012 |
The Modern Mechanic: A Scientific and Calculator, Comprising Rules and ... William Grier Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Συχνά εμφανιζόμενοι όροι και φράσεις
absciss avoirdupois axis base beam body breadth called cast iron centre of gravity centre of gyration chord circle circumference column cube root cubic foot cubic inches curve cylinder decimal denominator depth difference divided divisor draw equal feet long feet per second figure fluid foot force fraction fulcrum gallons give given line greater half heat hence horses inclined plane length lever machine measure mechanic minute motion move multiply Myriogramme number of teeth ordinate orifice ounces parabola parallel parallelogram pendulum perpendicular pinion pipe piston pitch plane polygon pounds pressure proportion pulley pump quantity of water quars quotient radius rectangle required number revolutions right angles rule shaft side specific gravity square inch square root steam engine stroke surface thickness tons tube valve velocity vertex vibrations vulgar fractions water wheel weight wheel wherefore yard
Δημοφιλή αποσπάσματα
Σελίδα 20 - Multiply the numerators together for a new numerator, and the denominators together for a new denominator.
Σελίδα 21 - Rule. — Multiply the whole number by the denominator of the fraction, add the numerator to the product and place the denominator under the result.
Σελίδα 23 - The denominator of a decimal, though never expressed, is always the unit, 1, with as many ciphers annexed as there are figures in the decimal.
Σελίδα 121 - Powers, are certain simple instruments, commonly employed for raising greater weights, or overcoming greater resistances, than could be effected by the natural strength without them. These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Σελίδα 61 - In a right triangle, the side opposite the right angle is called the hypotenuse and is the longest side.
Σελίδα 57 - Line. 7. A Curve continually changes its direction between its extreme points. 8. Lines are either Parallel, Oblique, Perpendicular, or Tangential. 9. Parallel lines are always at the same perpendicular distance ; and they never meet, though ever so far produced. 10. Oblique lines change their distance, and would meet, if produced on the side of the least distance.
Σελίδα 75 - At a given point A, in a line AB, to make an angle equal to a given angle C. From the centres A and C, with any one radius, describe the arcs DE, FG. Then, with radius DE, and centre F, describe an arc, cutting FG in G. Through G draw the line AG, and it will form the angle required.
Σελίδα 113 - GLAZIERS' WORK. GLAZIERS take their dimensions, either in feet, inches, and parts, or feet, tenths, and hundredths. And they compute their work in square feet. ' In taking the length and breadth of a window, the cross bars between the squares are included. Also windows of round or oval forms are measured as square, measuring them to their greatest length and breadth, on account of the waste in cutting the glass.
Σελίδα 73 - The areas of circles are to each other as the squares of their diameters.
Σελίδα 61 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.