. Appleton's dictionary of machines, mechanics, engine-work, and engineering. erves. In those machines in which a rectilinear motion, whether in a horizontal or vertical direction, is re-quired to be produced, that object has hitherto, in most cases, been accomplished by means of mechan-ism, more or less complicated and expensive, for converting the rotary motion transmitted through longtrains of shafts from the fly-wheel of a steam-engine, into a rectilinear motion. In establishments inwinch a great number of machines, small as well as great, have to be kept in motion, we believe thatno impro
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. erves. In those machines in which a rectilinear motion, whether in a horizontal or vertical direction, is re-quired to be produced, that object has hitherto, in most cases, been accomplished by means of mechan-ism, more or less complicated and expensive, for converting the rotary motion transmitted through longtrains of shafts from the fly-wheel of a steam-engine, into a rectilinear motion. In establishments inwinch a great number of machines, small as well as great, have to be kept in motion, we believe thatno improvement upon this roundabout method could be recommended ; but for single and independentmachines, where great power acting in a rectilinear direction is required, we believe that the directaction of the steam-engine, as exemplified in the machine now to be described, will supersede the morecircuitous, expensive, and, on many accounts, objectionable method hitherto practised. Another very important peculiarity in the machine now under consideration, deserves to be specially. RIVETING MACHINE. 573 noticed. In rivetingby hand the workman finds it necessary to bring the plates upon which he is opera-ting into close contact, by striking them with his hammer while closing and finishing the head of therivet. The necessity of this will be obvious when we consider that the iron pin, which is to form therivet, tends, by the compression to which it is subjected by the blows of the hammer, to stave up through-out its whole length, as well as at the end, and that, consequently, unless the plates are brought intovery close contact during the operation, an obstacle to their perfect junction is interposed by the verymeans employed to bring them into intimate contact. In M. Lemaitres machine this difficulty is obvi-ated by a very ingenious and effective contrivance which we shall now proceed to describe. Fig. 3220 is an elevation. Fig. 3221 a plan. Fig. 3222 an end view, and Fig. 3223 a partial
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
