History of the Typewriter

=—152 -* The Keystöhfe. The Keystone is a wheel machine. The working principle is very similar to that of the Hammond. The depression of a key-lever drives the type-wheel round until the letter to be printed comes into position, when the wheel is stopped by a swinging arm on the wheel-shaft engaging the depressed key-lever, this giving a positive stop. When the proper type is in printing position, the paper is driven against it by a hammer from behind. The alignment of the writing produced with the machine is, of course, beyond question, as is usually the case with wheel typewriters. Interchangeability of type is another advan- tage shared by the Keystone typewriter with other machines of the class. [Fig. ii8 The manufacturers have adopted the standard key- board for the machine. It writes eighty-four characters, there being twenty-eight type-keys and two shift-keys. The inking device is a ribbon. The weight is 8J lbs. The Munson Typewriter. This machine was first submitted to the public in about the year 1892, and it has, since then, maintained its hold on a considerable section of the typewriter-using public. Its features are particularly the compactness of the key- board (there being thirty keys governing thrice that number of characters), the peculiar form of typewheel, its manifolding ability, and other points. With cover it weighs about 16 lbs. It is six inches high, twelve inches wide, and eleven inches from front to back. There being no carriage on top, the necessity for heavy castings is obviated, and there are very few parts, and such parts as are employed are