Electromagnetically-operated printer

Claim 1

An electromagnetically-operated printer for printing on paper comprising a type wheel which comprises a plurality of column wheels frictionally mounted on a shaft in groups, each column wheel having types, hooks and a projection operative as a reset edge, means for printing the types on the paper, stopping means for engaging with said projections of all of the column wheels, said types being so arranged that when all column wheels are stopped by said stopping means, the wheels in each group are positioned in different phases, a select pawl provided for each column wheel and adapted to engage with said hooks of each column wheel, type selecting means for selecting a given type for each of the column wheels of said type wheel, column selecting means for each group of wheels rotating at a predetermined ratio relative to the shaft of said type wheel, said column selecting means being functionally coupled to said type selecting means, and electromagnetic means each corresponding to said column selecting means and functionally coupled to said type selecting means, said electromagnetic means being controlled by an electrical control means for comparing a given type with the type position of said type wheel, and said type selecting means being actuated only when both said column selecting means and said electromagnetic means are simultaneously actuated.