2021-04-17 01:56:38

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ENGLISH Between my tours through the Lige district I made a trip in the direction of Tongres, because I wanted to know what had become of all those Germans who had crossed the Meuse near Lixhe. It was remarkable to notice how friendly the Flemings of that district behaved with regard to the Germans. Although they criticised the violation of the country's neutrality sharply, and every family was proud of the sons who had taken up arms in defence of their Fatherland, yet they judged quite kindly the German soldiers who passed through their district. I often heard expressions full of pity toward those men, who could not help themselves, but were compelled to do whatever their superiors commanded them."Ah well, you come from The Netherlands; tell me whether it is true that you have let the Germans through, allowing them to ravish us? Tell me whether this is true?"

A planing machine invented by Mr Bodmer in 1841, and since improved by Mr William Sellers of Philadelphia, is free from this elastic action of the platen, which is moved by a tangent wheel or screw pinion. In Bodmer's machine the shaft carrying the pinion was parallel to the platen, but in Sellers' machine is set on a shaft with its axis diagonal to the line of the platen movement, so that the teeth or threads of the pinion act partly by a screw motion, and partly by a progressive forward movement like the teeth of wheels. The rack on the platen of Mr Sellers' [134] machine is arranged with its teeth at a proper angle to balance the friction arising from the rubbing action of the pinion, which angle has been demonstrated as correct at 5°, the ordinary coefficient of friction; as the pinion-shaft is strongly supported at each side of the pinion, and the thrust of the cutting force falls mainly in the line of the pinion shaft, there is but little if any elasticity, so that the motion is positive and smooth.Another object gained by equal action on both sides of large pieces is the quality of the forgings produced, which is generally improved by the rapidity of the shaping processes, and injured by too frequent heating.

In making notes, as much as possible of what is written should be condensed into brief formul?, a form of expression which is fast becoming the written language of machine shops. Reading formul? is in a great degree a matter of habit, like studying mechanical drawings; that which at the beginning is a maze of complexity, after a time becomes intelligible and clear at a glance.I had already been near Huy, at a time when several burning houses shrouded the whole town in clouds of smoke. On August 24th, at ten o'clock at night, some shots had been fired in the neighbourhood of the viaduct. This was a sign for hundreds of soldiers to begin shooting at random and arrest several persons. Several houses were perforated like sieves by bullets, and an entire street of twenty-eight houses, the Rue du Jardin, was reduced to ashes. No civilians were killed."Return that knife at once!"

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The first of these operations includes all threading processes performed on lathes, whether with a single tool, by dies carried positively by slide rests, or by milling."If you don't drink with us you are not our friend." At the same time he beat the ground with his rifle-butt and, willy-nilly, I had to drink.

There is but little object in preparing designs, when their counterparts may already exist, so that in making original plans, there should be a careful research as to what has been already done in the same line. It is not only discouraging, but annoying, after studying a design with great care, to find that it has been anticipated, and that the scheme studied out has been one of reproduction only. For this reason, attempts to design should at first be confined to familiar subjects, instead of venturing upon unexplored ground.

"A German officer came nearer, and, uncovering his head, said in a voice trembling with emotion: 'General, what you performed is admirable!' Evidently these words slightly comforted the defender of Lige, who before long was removed by motor-car to an ambulance in the town."In treating of machinery for transport, as a class, the subject, as far as noticed here, will be confined to moving and handling material as one of the processes of manufacturing, and especially in connection with machine construction. If the amount of time, expense, labour, and machinery devoted to handling material in machine shops is estimated, it becomes a matter of astonishment to as many as have not previously investigated the subject; as an item of expense the handling, often exceeds the fitting on large pieces, and in the heavier class of work demands the most careful attention to secure economical manipulation."Is that so? Well, it is not very clear! And that little girl?"

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Fourth. The arrangement of the parts of a combination machine have to be modified by the relations between them, instead of being adapted directly to the work to be performed.It is strange, considering the simplicity of construction and the very important office filled by machines for cutting on plane surfaces, that they were not sooner invented and applied in metal work. Many men yet working at finishing, can remember when all flat surfaces were chipped and filed, and that long after engine lathes had reached a state of efficiency and were generally employed, planing machines were not known. This is no doubt to be accounted for in the fact that reciprocal movement, except that produced by cranks or eccentrics, was unknown or regarded as impracticable for useful purposes until late years, and when finally applied it was thought impracticable to have such movements operate automatically. This may seem quite absurd to even an apprentice of the present time, yet such reciprocating movement, as a mechanical problem, is by no means so simple as it may at first appear."Well, sir, I wanted to follow, as far as the German Authorities desire to allow it, the movements of the German armies, in order to give reliable information to the Netherland public, who take a great interest in your progress."

I started on my return journey to The Netherlands sick to death. The consequences of lying on that wet floor made themselves badly felt, and besides being quite stiff and chilly, my interior was badly out of order.After determining the ultimate objects of an improvement, and laying down the general principles which should be followed in the preparation of a design, there is nothing connected with constructive engineering that can be more nearly brought within general rules than arranging details. I am well aware of how far this statement is at variance with popular opinion among mechanics, and of the very thorough knowledge of machine application and machine operation required in making designs, and mean that there are certain principles and rules which may determine the arrangement and distribution of material, the position and relation of moving parts, bearings, and so on, and that a machine may be built up with no more risk of mistakes than in erecting a permanent structure.5. As the strength of shafts is determined by their size, and their size fixed by the strains to which they are subjected, [45] strains are first to be considered.

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Apr-17 01:56:38