4 



Improved Rotdry Sazc Machine. 149 



izontal motion inward, which causes the log and index to 

 shift one numberj when tlie shifting iron strikes Lhe guard 

 screw, that prevents its shifting more than one number at a 

 time. The outer end of the hand being now relieved from 

 the trip iron, its pointer enters a new hole of the index by 

 means of the spring and the carriage again moves forward 

 for another cut. 



Thus it operates, without any aid except the power that 

 drives it, until it cuts a tier of lumber entirely around the 

 log, hke the radii of a circle, leaving their thin edges at- 

 tached to it. These are then taken off, and another tier 

 cut in the same manner, that is, when the log is large 

 enough to admit of two tiers* 



References to the Plate. 



Fig. 1, gives a top view of the machine with the log in it ready 



for working. 



2. ffives a side view of the same. 



3. an end view of the same with a log as partly cut. 



6. The Saw. 



6. The Sapper. 



7. The Hand-frame Spring and Hand. 



8. The Shifting iron in two views* 



9. The Setting iron. 



10. The Trip iron. 



11. The Trucks. 



12. The Stands. 



13. The Index. 



li _ Reference to the several Parts as put together. 



AA. The Frame, which is made of timber about 8 by 14 inches 



and put together by screws. 

 \ BB. The Carriage, made of timber about 7 by 8 inches, put 



together by screws,. 



C. The Log as dogged and put into the machine, 



D. Saw and Sappers. 



E. Main Pulley and Shaft. 



F. Feed Pulley and Shifting gear, which is connected to the 



rackj under the carriage. 



G. Tightening Pulleys. 

 HH. Regulating Pulleys and Shaft. 

 I I. Friction Rollers and Stands. 

 J* Index. 



: 



«.»^Ui.'- 



