2021-04-17 12:38:52

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ENGLISH

Many of the most accurate measurements are, however, performed by sight, with vernier calipers for example, the variation being multiplied hundreds or thousands of times by mechanism, until the least differences can be readily seen.

On the hot afternoon of August 7th, 1914, the much-delayed train rumbled into the station at Maastricht. A dense mass stood in front of the building. Men, women, and children were crowded there and pushed each other weeping, shouting, and questioning. Families and friends tried to find each other, and many of the folk of Maastricht assisted the poor 16creatures, who, nervously excited, wept and wailed for a father, for wife and children lost in the crowd. It was painful, pitiful, this sight of hundreds of fugitives, who, although now safe, constantly feared that death was near, and anxiously clutched small parcels, which for the most part contained worthless trifles hurriedly snatched up when they fled.It was stated that to give a dead or stamp stroke, the valve must move and admit steam beneath the piston after the hammer has made a blow and stopped on the work, and that such a movement of the valve could not be imparted by any maintained connection between the hammer-head and valve. This problem is met by connecting the drop or hammer-head with some mechanism which will, by reason of its momentum, continue to 'move after the hammer-head stops.' This mechanism may consist of various devices. Messrs Massey in England, and Messrs Ferris & Miles in America, employ a swinging wiper bar [112], which is by reason of its weight or inertia retarded, and does not follow the hammer-head closely on the down stroke, but swings into contact and opens the valve after the hammer has come to a full stop.

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Cores expand when heated, and require an allowance in their dimensions the reverse from patterns; this is especially the case when the cores are made upon iron frames. For cylindrical cores less than six inches diameter, or less than two feet long, expansion need not be taken into account by pattern-makers, but for large cores careful calculation is required. The expansion of cores is as the amount of heat imparted to them, and the amount of heat taken up is dependent upon the quantity of metal that may surround the core and its conducting power.In cylindrical fitting, which as before pointed out, constitutes the greater part in machine fitting, gauges are especially important, because trial-fitting is in most cases impossible.The shelling went on during the night, and all that time the inhabitants remained in their cellars.

They carried all those patients into the cellars on stretchers, and there waited with the nursing staff for the bombardment that had been announced, but never came off.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.The feed motion in slotting machines, because of the tools being held rigidly, has to operate differently from that of planing machines. The cross-feed of a planing machine may act during the return stroke, but in slotting machines, the feed movement should take place at the end of the up-stroke, or after the tools are clear of the material; so much of the stroke as is made during the feeding action is therefore lost; and because of this, mechanism for operating the feed usually has a quick abrupt action so as to save useless movement of the cutter bar.

Suddenly I saw a boy about twelve years old in one of the burning streets. He waved his arms, rushed madly to and fro, calling for his father and mother, and his little brother and sisters. He was in danger of perishing in the fire, or being killed by the murderous bullet from a rifle. I ran after him, laid hold of him, and in spite of his resistance pulled him back. Fortunately I met a couple of kind, sober soldiers to whom I told the story, and who promised to send the boy away from the burning town.The news, that all the forts had now been taken was quickly communicated to the surrounding military posts, and in consequence the soldiers were in a wanton mood. Most of the houses which I passed had their doors and windows smashed and70 broken, but the most provoking was that soldiers had compelled the people in the cafs along the canal to open their pianos and make their musical automatons play. To the tunes of these instruments they danced, yelling and shouting. No greater contrast was imaginable than that between such scenes and the burning village with the frightened inhabitants around it.

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In this grand old monastery, both inside and out a jewel of architecture, about five hundred people had found shelter. They were lodged in halls, rooms, and kitchens. The fathers gave them everything in the way of food they might require, but they had to do their own cooking. As not one of these people had a home left, which they could call their own, no wonder that they greatly admired the fathers. Often when I strolled about with one of these, one or other of the refugees came to him to press his hand and express gratitude for the hospitality offered."It is highly deplorable when officers or non-commissioned officers set houses on fire without the permission or order of the commanding, or, as the case may be, the senior officer, or when by their attitude they encourage the rank and file to burn and plunder.

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.Fifth. The cost of special adaptation, and the usual inconvenience of fitting combination machines when their parts operate independently, often equals and sometimes exceeds what is saved in framing and floor space.

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Apr-17 12:38:52