The operative mechanic's workshop companion, and the scientific gentleman's practical assistant |
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Página iii
... hence it is with a wish to diminish those wants in some degree that the present attempt has been made to supply the neces- sary information . In regard to the selection , great care has been taken that the subjects be not only ...
... hence it is with a wish to diminish those wants in some degree that the present attempt has been made to supply the neces- sary information . In regard to the selection , great care has been taken that the subjects be not only ...
Página 1
... hence , PRACTICAL GEOMETRY is the method of applying the rules of the science to practical pur- poses . 1. From any given point , in a straight line , to erect a perpendicular ; or , to make a line at right angles with a given line . On ...
... hence , PRACTICAL GEOMETRY is the method of applying the rules of the science to practical pur- poses . 1. From any given point , in a straight line , to erect a perpendicular ; or , to make a line at right angles with a given line . On ...
Página 18
... hence , being deemed by the preceding figure already sufficiently described , further elucidation must be con- sidered unnecessary . 44. To determine the proper forms for a pair of bevel wheels , the required angle of the shafts and dia ...
... hence , being deemed by the preceding figure already sufficiently described , further elucidation must be con- sidered unnecessary . 44. To determine the proper forms for a pair of bevel wheels , the required angle of the shafts and dia ...
Página 20
... hence , all the other lines being so distinctly described by mere in- spection of the diagrams , further explanation is un- necessary . Fig . 2 is a projected representation of an undershot water wheel , of which A is the plan , vn the ...
... hence , all the other lines being so distinctly described by mere in- spection of the diagrams , further explanation is un- necessary . Fig . 2 is a projected representation of an undershot water wheel , of which A is the plan , vn the ...
Página 32
... ; required the area of the fire grate . 7 in.5833 and 6 in . = 5 ( see Table of Equivalents , p . 31 ) : hence 4.5833 x 3.5 = 16 · 04155 square feet , the area . 3. Required the number of square yards in a floor rectangle, rhomboid,
... ; required the area of the fire grate . 7 in.5833 and 6 in . = 5 ( see Table of Equivalents , p . 31 ) : hence 4.5833 x 3.5 = 16 · 04155 square feet , the area . 3. Required the number of square yards in a floor rectangle, rhomboid,
Términos y frases comunes
18 feet absolute strength aëriform amount of effective angle aperture application atmosphere bar iron beam bisect block and tackle bodies boiler breadth cast iron centre circumference column condensation cube cubic feet cubic inches cylinder decimal depth dimensions distance divide the product draw the line effective power elastic force feet in length feet per minute feet per second fluid foot friction frustum fulcrum gallons given gravity heat hence inches diameter inches of mercury inclined plane leading screw lever lineal logarithm multiplied number of teeth Number of threads perpendicular pipe piston pressure principle pulley pump quired quotient equal radius ratio Required the number resistance revolutions per minute rule Rule.-Multiply SD SD SD side spindle square feet square inch square root steam engine stroke Suppose surface Table Tabular value temperature thickness unguent velocity weight wheels and pinions whole width yards
Pasajes populares
Página i - WORKSHOP COMPANION. Comprising a great variety of the most useful Rules and Formulae in Mechanical Science, with numerous Tables of Practical Data and Calculated Results for Facilitating Mechanical Operations. By WILLIAM TEMPLETON, Author of " The Engineer's Practical Assistant, "&c., &c. Eighteenth Edition, Revised, Modernised, and considerably Enlarged by WALTER S. HUTTON, CE, Author of "The Works' Manager's Handbook," " The Practical Engineer's Handbook,
Página 28 - Square Measure. 144 square inches 1 square foot, 9 square feet 1 square yard, 30J square yards 1 square rod, 40 square rods 1 rood, 4 roods 1 acre.
Página 100 - MECHANICAL POWERS are certain simple instruments employed in raising greater weights, or overcoming greater resistance than could be effected by the direct application of natural strength. They are usually accounted six in number; viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Página 110 - The wedge is a double inclined plane ; consequently, its principles are the same- Hence, when two bodies are forced asunder by means of the wedge, in a direction parallel to its head, multiply the resisting power by half the thickness of the head or back of the wedge, and divide the product by the length of one of its inclined sides ; the quotient is the force equal to the...
Página 92 - To find the absolute strength of a rectangular beam, when fixed at one end and loaded at the other. RULE. Multiply the value of S by the depth of the beam, and by the area of its section, both in inches: divide the product by the leverage in inches, and the quotient equal the absolute strength of the beam in Ibs.
Página 35 - From half the sum of the three sides subtract each side ; multiply the half sum and the three remainders together, and the square root of the product will be the area required.
Página 95 - Resistance of bodies to flexure by vertical pressure. When a piece of timber is employed as a column or support, its tendency to yielding by compression is different according to the proportion between its length and area of its cross section ; and supposing the form that of a cylinder whose length is less than seven or eight times its diameter, it is impossible to bend it by any force applied longitudinally, as it will be destroyed by splitting before that bending can take place ; but when the length...
Página 47 - RULE. To twice the length of the base, add the length of the edge, multiply the sum by the breadth of the base, and this product by the perpendicular height of the wedge ; and | of the last product will be the solidity.
Página 124 - When no unguent is interposed, the amount of the friction is, in every case, wholly independent of the extent of the surfaces of contact ; so that, the force with which two surfaces are pressed together being the same, their friction is the same, whatever may be the extent of their surfaces of contact.
Página 90 - ... in Ibs. by the cube of the length in feet; divide the product by 32 times the tabular value of E, multiplied into the given deflection in inches ; and the quotient is the breadth multiplied by the cube of the depth in inches.