The Kinematics of MachineryMacmillan and Company, 1876 - 622 σελίδες |
Περιεχόμενα
| 83 | |
| 86 | |
| 131 | |
| 139 | |
| 146 | |
| 152 | |
| 160 | |
| 169 | |
| 186 | |
| 201 | |
| 220 | |
| 226 | |
| 232 | |
| 242 | |
| 247 | |
| 248 | |
| 251 | |
| 252 | |
| 253 | |
| 255 | |
| 258 | |
| 263 | |
| 264 | |
| 268 | |
| 302 | |
| 304 | |
| 313 | |
| 318 | |
| 323 | |
| 327 | |
| 333 | |
| 341 | |
| 342 | |
| 344 | |
| 355 | |
| 362 | |
| 416 | |
| 422 | |
| 436 | |
| 443 | |
| 451 | |
| 473 | |
| 480 | |
| 486 | |
| 516 | |
| 522 | |
| 585 | |
| 615 | |
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
already alteration angle application arrangement auxiliary centroids axes axis axoids Bährens become block bodies chain-closure chamber circular arcs closed pair closure common complete conic connected considered constrained construction corresponding coupler crank crank mechanisms cross-block curve cylinder dead points direction duangle employed engine equal examine example field of turning fixed link force-closure forces formula further geometrical gives higher pairing instantaneous centre intersection kinematic chain kinematic pair latter M₁ machine machinery means mechanism method moving nature normal obtained occurs P₁ pair-closure pairs of elements parallel paths piston Plate point-paths points of restraint portion position possible pressure-organ prevent prism problem profiles pulley pump quadric radii radius relative motion rhombus rolling rotation roulettes ruled surfaces screw shaft shown in Fig shows side simple slider sliding solid of revolution spindle spur-gearing spur-wheels steam-engine straight line surfaces symbols tangents teeth triangle wheel whole
Δημοφιλή αποσπάσματα
Σελίδα 35 - A machine is a combination of resistant bodies so arranged that by their means the mechanical forces of nature can be compelled to do work accompanied by certain determinate motions.
Σελίδα 5 - I have only tried it in a slight model yet, so cannot build upon it, though I think it a very probable thing to succeed, and one of the most ingenious simple pieces of mechanism I have contrived, but I beg nothing may be said on it till I specify.
Σελίδα 11 - (The science of mechanisms) must therefore not define a machine, as has usually been done, as an instrument by the help of which the direction and intensity of a given force can be altered, but as an instrument by the help of which the direction and velocity of a given motion can be altered.
Σελίδα 597 - Indians with their most peculiar and valued ornament — a cylindrical, opaque, white stone, looking like marble, hut which ia really quartz imperfectly crystallized. These stones are from four to eight inches long, and about an inch in diameter. They are ground round, and flat at the ends, a work of great labour, and are each pierced with a hole at one end. through which a string is inserted, to suspend it round the neck.
Σελίδα 9 - In earlier times men considered every machine as a separate whole, consisting of parts peculiar to it; they missed entirely or saw but seldom the separate groups of parts which we call mechanisms. A mill was a mill, a stamp a stamp and nothing else, and thus we find the older books describing each machine separately from beginning to end. So for example Ramelli (1588) in speaking of various pumps driven by water-wheels describes each afresh from the wheel, or even the water driving it, to the delivery...
Σελίδα 602 - 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 597 - Tushaina wears as the symbol of his authority, for it is generally of the largest size and is worn transversely across the breast, for which purpose the hole is bored lengthwise from one end to the other, an operation which, I was informed, sometimes occupied two lives.3 Stevens and Lubbock refer to this.4 Prof.
Σελίδα 4 - AB, CD, being two equal radii revolving on the centres B and C, and connected together by a rod AD, in moving through arches of certain lengths, the variations from the straight line would be nearly equal and opposite, and that the point E would describe a line nearly straight, and that if for convenience the radius CD was only half of AB, by moving the point E nearer to D, the same would...
Σελίδα 585 - A machine may be defined either from a statical or from a kinematical point of view. Regarded statically, it is any instrument by means of which we may change the direction, magnitude, and point of application of a given force ; and regarded kinematically, it is any instrument by means of which we may change the direction and velocity of a given motion.
Σελίδα 45 - ... by single pairs by combination. With different methods of combination different results are obtained, but in every case there results only one pair. Accordingly, the reciprocal combination of the elements of two pairs gives us again a pair of elements, which may differ from either of the single pairs of which it is composed.