40 



OFFICIAL RETROSPECTIVE EXlIiniTIOX 



de support alin d'eviter la traction latorale ot dans co but il fit le 

 timt)n de tirag-e rcg'lablc latoralonicnt dans sa position relative a la 

 roue principale de support. Plusieurs tenlatives ont ete faites poste- 

 rieurenient a la date de Tinvention de Pease pour operer I'appareil 

 couj)eur des instruments a recolter an moyen d'une came, mais avec 

 des resultats defavorables, la rais<^n en etant (pie le clioc sur la bielle 

 et I'appareil de coupe etait assez fort pour etre destructil. 



No. ig. 



PALMER ^: WILLIAMS' SELF-RAKING REAPING MACHINE. 



On February 4, 1851, a United States patent was granted to Aaron 

 Palmer and S. G. Williams for improvement in reapers. This 

 machine was provided with a quadrant platform and an automatic rake 

 adapted to sweep the latter and deliver the accumulated grain to the 

 ground, depositing it away from the path of travel for the next round of 

 cutting. Its construction was so simple and its operation so perfect that 

 it almost at once came into extensive use. The machines so constructed 

 were provided with the Hussey cutting apparatus, and the rake arm was 

 pivoted to the main supporting frame, and moved backward and forth 

 by segments on the main supporting wheel. The rake head was adapted 

 to be raised by a projection upon its outer end that moved along over a 

 curved rod upon the board of the outer divider, but permitted it to fall 

 so that its teeth could strike into the grain when at its farthest point for- 

 ward and carry the latter thercwitli in its backward movement. 



No. 19. 



MACHINE .\ MoISSONNER PALMER .V WILLIAMS. 



Le 4 Fevrier 1S51 un brevet des Etats-Unis fut accorde a Aaron 

 Palmer et S. G. Williams pour perfectionnement de Moissonneuses. 

 Cette machine etait munie d'une platcformc en forme d'un quart de 



