. Appleton's dictionary of machines, mechanics, engine-work, and engineering. rmed by placing 2, 3, or 4strings in contact, and coiling them as a flat band round the cylinder. The screw may also vary insection, that is, the section of the worm or thread may be angular, square, round, etc. Micrometer screws are screws of extremely fine pitch, accurately made, and used for screws is a term applied to the common screw, as used by carpenters. Machine screws are a sim-ilar screw adapted to joiners in iron work. SCREWS—SELF-OPERATING SHAVER. This is an improvement in machinery for tu
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. rmed by placing 2, 3, or 4strings in contact, and coiling them as a flat band round the cylinder. The screw may also vary insection, that is, the section of the worm or thread may be angular, square, round, etc. Micrometer screws are screws of extremely fine pitch, accurately made, and used for screws is a term applied to the common screw, as used by carpenters. Machine screws are a sim-ilar screw adapted to joiners in iron work. SCREWS—SELF-OPERATING SHAVER. This is an improvement in machinery for turning orshaving the heads of the blanks which are to be formed into wood-screws, by J. Cullen Whipple,Providence, Rhode Island. In the machines heretofore used for turning or shaving the heads of blanks, the tool or cutter by whichthey were finished was brought up against them by hand; but in this improved machine the partsare made self-acting by means of cams and levers, and other devices connected therewith, arranged forthat purpose in the manner to be described. In the accompanying drawings Fig. 3241 is a side, and Fig. 3242 a plan or top view. A A is theframe of the machine, which is made of cast-iron. C C is a tubular or hollow arbor or spindle, which issustained by and runs in the heads A A. The arbor or spindle 0 is driven by a band on a whirl orpulley D, and it is widened out at its end, C, so as to constitute two cheeks which embrace the jawsE E. Through the tubular arbor C the sliding-bolt F F passes, and serves to close the jaws E, itswedge-formed end F passing in between the tails a a of the jaws for that purpose. The sliding-bolt F Mi fifi 1 L^P-t*- gll_ 1
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
