, ▁by ▁Horn s by - A ck ro yd ▁in ▁ 1 8 9 7 , ▁but ▁like ▁the ▁steam - power ed ▁tra ction ▁engines , ▁this ▁was ▁very ▁heavy ▁at ▁ 8 6 0 0   kg ▁( 8 . 5 ▁tons ). ▁ ▁Al bone ▁conce ived ▁a ▁light - weight ▁pet rol - power ed ▁general ▁purpose ▁agricult ural ▁vehicle . ▁By ▁November ▁ 1 9 0 1 ▁he ▁had ▁completed ▁his ▁tra ctor ▁design , ▁and ▁file d ▁for ▁a ▁pat ent ▁on ▁ 1 5 ▁February ▁ 1 9 0 2 . ▁On ▁ 1 2 ▁December ▁ 1 9 0 2 ▁he ▁formed ▁I vel ▁Agricult ural ▁Mot ors ▁Limited . ▁The ▁other ▁direct ors ▁were ▁Sel w yn ▁Edge , ▁Charles ▁Jar rott , ▁John ▁H ew itt ▁and ▁Lord ▁Will ough by . ▁He ▁called ▁his ▁machine ▁the ▁I vel ▁Agricult ural ▁Motor , ▁the ▁word ▁' t ractor ' ▁did ▁not ▁come ▁into ▁common ▁use ▁until ▁later . ▁ ▁Dan ' s ▁" t ractor " ▁won ▁silver ▁medal ▁at ▁the ▁Royal ▁Agricult ural ▁Show , ▁in ▁ 1 9 0 3 ▁and ▁ 1 9 0 4 ; ▁and ▁in ▁February ▁ 1 9 0 4 ▁an ▁I vel ▁Agricult ural ▁Motor ▁won ▁a ▁Gold ▁Medal ▁in ▁the ▁Ch ester ▁Pl ough ing ▁Match ▁held ▁at ▁W aver ton , ▁this ▁being ▁the ▁first ▁occasion ▁on ▁which ▁a ▁competition ▁of ▁that ▁kind ▁had ▁been ▁open ▁to ▁mechan ically ▁prop elled ▁pl