Installment no. 3 of my public display at the Xavier University library:
Hammond no. 1 (USA, ca. 1889): This typewriter invented by James B. Hammond uses an interchangeable swinging sector and a hammer that hits the paper from behind. This model 1 is largely encased in wood. The machine was available either with a two-row, curved “Ideal” keyboard or with a three-row QWERTY keyboard.
Hammond Folding Multiplex (USA, 1923): While Hammond was never the leader among typewriter manufacturers, the company had a solid customer base. This portable Hammond can hold two type shuttles at once. Its keyboard folds up for compactness when it is put in its carrying case.
Varityper (USA, ca. 1937): This successor to the Hammond is an electric typewriter that uses a carbon-paper ribbon. More elaborate Varityper models were capable of justifying the right margin and typing proportionally (assigning different widths to different characters). Varitypers built on the Hammond system were made into the 1970s, and were often used by small publishers to lay out text for photo offset printing. One Arizona printer is still using Varitypers today.
Emerson (USA, ca. 1910): The Emerson uses a unique system, with typebars swinging in toward the center from the sides. Made in Woodstock, Illinois, it was modestly successful.
Underwood no. 5 (USA, 1925): The Underwood is the most influential design in typewriter history; many manufacturers imitated this system, which uses typebars that strike the front of the platen, a four-row QWERTY keyboard with single shift, and an ink ribbon. The no. 5, with over three million machines made from 1900 to 1933, is the most famous Underwood model.
Underwood Portable (USA, 1929): In 1919 Underwood introduced a three-row portable typewriter that embodied the company’s high standards of quality. This example with green marble paint is among the last made before this model was replaced by a larger, four-row design.
Woodstock Electrite (USA, ca. 1925): The Woodstock, successor to the Emerson, used an Underwood-style design and was quite successful. The Electrite model used a spinning metal shaft to propel typebars to the platen; shift and carriage return were still manually controlled. This model sold in small numbers, and electric typewriters were not adopted widely until the 1950s.