320 



Models of Machine Elements, Machine Parts and Machines. 



52 311. 1 : 5. 



52 312. 1 : 6. 



52.305. Large Spur Wheel Sector with Small Spur Wheel, Figure, very largo pattern, for 

 demonstrating the Boiling of the Tooth-profiles on each other, with cycloidal profile . 5.1(>.(> 



52.306. - - i d e in, with involute profile 5. 10. 



52.307. Two Toothed Wheels, with an intermediate wheel, for transmission without changing 

 direction or rotation 4. 0.0 



52.308. Two Toothed Wheels with two intermediate wheels, for transforming into a reverse 

 direction of rotation 4.10.0 



52.309. Wheel Suspension with five toothed wheels, Figure, for connecting up two parallel 



axes of variable distance 6. 0. 



52.310. Internal Toothed Wheel and Spur Wheel, Figure, of metal 2. lo.o 



The direction of motion of the two wheels is the same. As a number of teeth are always in 

 contact at the same time greater power can be transmitted by this gear than with spur gearing pure 

 and simple. 



.">:.'. .'ill. Rack with Spur Wheel Motion, Figure, of metal 



52,312. Universal Wheel Apparatus (Kmsmann's), Figure (Fr. phys. Techn. I, 2, Fig. 2042 



[I, Fig. 84]; Ztschr. f. d. phys. u. chem. U. 2, 1885, p. 5) 



Four different kinds of toothed wheels are used on the apparatus, viz., the. spur wheel, the hevel 

 wheel, the crown wheel and the lantern wheel. The crank can be placed on either the centre or 

 lower horizontal axis, and the ratio of gearing in the former ease on the upper vertical axis is 1 : 30, 

 and in the latter' ease the ratio is 1 : 60. 



2.ir..o 

 4. 0.0 



r>2,;>i3. Mangle Gear, of wood, hn-ge model 

 52,314. idem, Figure, of metal . 



3. 0.0 

 2. 2.0 



54.-.. :,:.'. 

 f,!4. 546. 



