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AMES OAMI Mechanical Training Manual for Standard and Portable Typewriters
By: Clarence Leroy Jones
In 3 Volumes plus Addendum - Published 1945

Volume Two: Portable Typewriters

Underwood Portable Typewriter Repair

Cover Plates

Main Carriage

Mainspring and Drawband

Ring and Cylinder

Motion and Shift Mechanism

Platen

Variable

Paper Feed

Line Space Lever

Margin Stops and Line Lock

Rack, Pinion and Starwheel

Universal Bar

Escapement Action

Space Bar

Ribbon Feed

Ribbon Bichrome

Back Spacer

Typebars