974 Eepair & Maixtenaxce of Threshing Machines. [Jan. 



Bent bars may be straightened on an anvil, as shown in 

 Sketch C. In modern threshino- machines the concaves are 



CONCAVE BARS BENTeWORN 



SPACE BETWEEN CONCAVE 

 ^^BAR «S DRUM BEATER 



I 



WOPM DRUM BEATEP \ 



LINE 



SKETCH A 



I PACKING 

 METHOD OF STRAIGHTENING DRUM BEATER 



SKETCH B 



METHOD OF ^RMCv TZ: -l^^C CQ\<y::<JEQARS 



ON AN ,\NVi_ 



SKETCH C 



