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.
"Well? Go on, nothing could be worse than what has happened."Screw-cutting machines may be divided into modifications as follows:(1) Machines with running dies mounted in what is called the head; (2) Machines with fixed dies, in which motion is given to the rod or blank to be threaded; (3) Machines with expanding dies which open and release the screws when finished without running back; (4) Machines with solid dies, in which the screws have to be withdrawn by changing the motion of the driving gearing; making in all four different types.
FORE:"Oh, but listen: my papers...."Hetty nodded. She perfectly understood. And Bruce had often told her that she was one of the best nurses he had ever met. There was nothing to do for the moment beyond watching over the patient to see that no change occurred.
"The fellow told you really nothing," he said thoughtfully, "at least, nothing that we can put to any practical use. He has his own vengeance to gratify, and therefore he is not in the least anxious to assist the law."