314 



Models of Machine Elements, Machine Parts and Machines. 



Nn. 



52244. 1:10. 



52 248. 1 : 8. 



52 243. 1 : 6. 



52 250. 1 : 6. 



52 252. 1 : 4. 



52 253. 1 : 5. 



52.242. Screw with two Threads of Different Pitch, with nuts (differential gear) 



52.243. Screw Thread with Ratchet Brace, of metal, Figure (M. P. I, Fig. 275 [272]) 



52.244. Screw Press, of wood, Figure 



52.245. Quadrilateral Crank Gear, with a rotating and an oscillating crank 



52.246. Rotating Double Crank 



52.247. Oscillating Double Crank 



52.248. Parallel Crank, Figure 



52.249. Counter-motion Anti-parallel Cranks 



52.250. Anti-parallel Cranks, working in same direction, Figure 



52.251. Equilateral Crank Gear (Galloway's) . 



A crank rectangle, in which the two adjacent sides are equal, and the opposite pairs of sides 

 differ in length. 



52.252. Crank Shaft, Figure, of metal 



52.253. Oscillating Thrust Crank, Driving Wheel with Connecting Rod, with cross head and 

 guide, F i g u r e, of metal 



52.254. Oscillating Slot and Crank, Connecting Eod in the form of a piston rod, cylinder 

 oscillating 



This mechanism is also employed in the sectional model of an oscillating cylinder of steam engine 

 to be mentioned later. 



n. 53%. r..i.w. 

 144, :-! 



s. <1. 

 2.10.0 



1.16.0 

 0.10.0 

 4. 0.0 

 4. 0.0 

 4. 0.0 

 4. 0.0 

 4. 0.0 

 4. 0.0 



4. 0.0 



2.10.0 



5. 0.0 



5. 0.0 



