Electric typewriter

Claim 1

A low-profile electric typewriter comprising a housing, a carriage having a platen and mounted on said housing, type bars oppositely positioned to said platen and pivotally disposed in said housing, keys operatively connected to said type bars respectively, a power-operated printing mechanism operatively connected to said keys and adapted to actuate said type bars, a power-operated spacing mechanism operatively connected to said keys and adapted to feed said carriage in one direction transversely of said keys, a power-operated carriage return mechanism adapted to return said carriage to a position from which it was fed, and electrically-operated power means disposed in said housing and operatively connected to said power-operated mechanisms, said electrically-operated power means comprising a motor installed at the rear end of said housing below and behind said platen, a pulley disposed at a side end of said housing and coupled to said motor for rotation thereby, two coaxial intermediate pulleys having different diameters respectively and journaled on said housing forwardly of said platen, a drive pulley disposed at a forward portion of said housing and journaled thereon, a first endless belt entrained over said larger diametered intermediate pulley and said pulley directly coupled to the motor, a second endless belt entrained over said smaller diametered intermediate pulley and said forward drive pulley, and a biasing roll disposed for rotation on the upper run of said first endless belt generally beneath the platen on said belt between said pulley and said large intermediate pulley whereby said platen and carriage afford a low profile to said typewriter, said power-operated spacing mechanism comprising a drive shaft rotatably mounted on said housing and projecting inwardly beneath said carriage; a carriage base for said carriage; a cam member fixed to said shaft and rotatable therewith, a reciprocable actuating lever extending fore-andaft of said housing, power-operated drive means operatively connected through at least one key for reciprocating said actuating lever; an escapement-pawl holder pivotally mounted on said carriage base at an upper portion and abutingly engaged with said cam for oscillation thereby as said cam is operated by said actuating lever, means for moving said carriage spaceby-space along said base, an escapement pawl assembly on said holder and operatively connected to said means for moving said carriage whereby reciprocation of said actuating lever will move said carriage a single space.