. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . he teethare made. If their cutting portions are formed of cycloids, then the whole set of gear-wheelscut with them will l)e of the epicycloidal or double-curve system. If they are formed simplyof straight sides, then a set of involute or single-curve gears will be generated and cut, ortheir cutting portions may be composed of both straight lines and cycloids and produce recent system of gearing, which h
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . he teethare made. If their cutting portions are formed of cycloids, then the whole set of gear-wheelscut with them will l)e of the epicycloidal or double-curve system. If they are formed simplyof straight sides, then a set of involute or single-curve gears will be generated and cut, ortheir cutting portions may be composed of both straight lines and cycloids and produce recent system of gearing, which has composite teeth with the contours partly invo-lute and partly epicycloidal. All the cutters in a series are made exactly alike and interchangeable, the thickness ofeach or the distance from the center of one to the center of that adjoining being equal to thepitch of ttic gear to be cut. As indicated in Fig. 7, the two segments of a cutter are firstmade whole, with four holes an equal distance from the center, through which the rods passthat fasten them together. After the cutters are nearly completed they are bisected with anarrow tool, leaving two holes in each Fig. 9.—Swaseys gear-cutter—section of head. » Fig. 9 is a cross-section of the head, showing the mechanism for revolving and reciprocat-ing the cutters. The rods which extend through the cutters serve not only to hold themfirmly together but to revolve them, and at the same time act asslides for the reciprocating motion. Tlie spindles on either side ofthe cutters, through which the rods extend, are revolved independ-ently and at the same speed by means of a fiarallel shaft, having apinion at each end, which engages with a large gear on each sj>in-dle. By this means the four rods carrying f lie two cutter .>ieclionsare revolved from each end, thus avoiding the torsional strain whichwould result if driven from one end only. 1lie pair of rods foreach section, after piissing through one of the spind
Size: 2421px × 1032px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
