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    Software name: appdown
    Software type: Microsoft Framwork

    size: 965MB

    Lanuage:Englist

    Software instructions



      4. Mechanical drawings should be made with reference to all the processes that are required in the construction of the work, and the drawings should be responsible, not only for dimensions, but for unnecessary expense in fitting, forging, pattern-making, moulding, and so on.

      From the other side came two soldiers, one of whom she recognised, as he had been billeted on her. Constantly weeping, her face distorted, she sent another glance towards that fiery blaze, looked at the soldier as if reprovingly, hesitated a moment, but then pressed the enemy's hand, sobbing: "Adieu!—adieu!""Have you been there already? I am going there too. How are things there?"

      The steam cylinder which moves the hammers is set in the earth at some depth below the plane upon which they move, and even when the heaviest work is done there is no perceptible jar when one is standing near the hammers, as there always is with those which have a vertical movement and are single acting.It may also be mentioned that lathes constructed with angular guides, have usually such ways for the moving heads as well as for the carriages; this gives the advantage of firmly binding the [125] two sides of the frame together in fastening the moving head, which in effect becomes a strong girt across the frame; the carriages also have an equal and independent hold on both sides of a shear. In following this matter thus far, it may be seen how many conditions may have to be considered in reasoning about so apparently simple a matter as the form of ways for lathe carriages; we might even go on to many more points that have not been mentioned; but what has been explained will serve to show that the matter is not one of opinion alone, and that without practical advantages, machine tool-makers will not follow the most expensive of these two modes of mounting lathe carriages.


      CHAPTER II

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      During the night only a few houses were burnt down; the general destruction followed the next morning, Sunday, August 16th, and just as I reached the little town the flames were raging all over the place in a fierce blaze.

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      It is generally a safe rule to assume that any custom long and uniformly followed by intelligent people is right; and, in the absence of that experimental knowledge which alone enables one to judge, it is safe to receive such customs, at least for a time, as being correct.

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