The operative mechanic's workshop companion, and the scientific gentleman's practical assistant |
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Halaman 3
... towards the centre , when the centre is inacessible . Divide the whole or any given portion of the cir- cumference into the desired number of equal parts ; then with any radius less than the distance 3 2 PRACTICAL GEOMETRY . 3.
... towards the centre , when the centre is inacessible . Divide the whole or any given portion of the cir- cumference into the desired number of equal parts ; then with any radius less than the distance 3 2 PRACTICAL GEOMETRY . 3.
Halaman 14
... A B required . 36. To draw a right line equal to any given portion of the circumference of a circle . Let ABCD be a given circle , the whole circumference of which is required ; draw at right angles the 14 PRACTICAL GEOMETRY .
... A B required . 36. To draw a right line equal to any given portion of the circumference of a circle . Let ABCD be a given circle , the whole circumference of which is required ; draw at right angles the 14 PRACTICAL GEOMETRY .
Halaman 15
... whole circumference ; and if lines be drawn from b , through points in the circumference , meeting the line Ad , as gg , hh , & c . , the corresponding parts will be equal to each other . 37. To draw a spiral with spaces of uniform dis ...
... whole circumference ; and if lines be drawn from b , through points in the circumference , meeting the line Ad , as gg , hh , & c . , the corresponding parts will be equal to each other . 37. To draw a spiral with spaces of uniform dis ...
Halaman 18
... whole length of the screw , but it is much more convenient , when the proper curves are obtained , to form a suitable ruler : lay it in its proper situation upon each division , and draw the lines as required . 43. To delineate a square ...
... whole length of the screw , but it is much more convenient , when the proper curves are obtained , to form a suitable ruler : lay it in its proper situation upon each division , and draw the lines as required . 43. To delineate a square ...
Halaman 18
... whole circumference ; 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 ...
... whole circumference ; 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 ...
Istilah dan frasa umum
18 feet absolute strength aëriform amount of effective angle aperture application Area in sq atmosphere beam block and tackle bodies boiler breadth cast iron centre Circum.in circumference column condensation cube cubic feet cubic inches cylinder decimal depth describe 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 High Holborn inches diameter inches of mercury inclined plane leading screw lever lineal logarithm Multiply number of teeth Number of threads parallel perpendicular pipe piston Plate pressure principle pulley pump quotient equal radius ratio Required the number resistance revolutions per minute Rule side spindle square feet square inch square root steam engine stroke Suppose surface Table Tabular value temperature thickness unguent velocity weight wheels and pinions width yards دو دو
Bagian yang populer
Halaman 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,
Halaman 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.
Halaman 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.
Halaman 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...
Halaman 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.
Halaman 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.
Halaman 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...
Halaman 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.
Halaman 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.
Halaman 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.