arts in the usual manner. Should the the receiving or female screw. pin is afterward ground into them, so that the point spindle heat by continued use, it will not bind end- SCREW MACHINE. fits them all alike. This pin is withdrawn when the Want of uniformity in the screws used in connect- wise,… … lever, of which the fulcrum is attached to the sliding pense both to the manufacturer and operator, so that piece, which supports the revolving head, one end in which shells of different sizes (which are cheaply in many cases what was at first supposed to be the made) are inserted, for holding the…
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