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The Wheatstone slip was a paper tape that contained holes in a pattern to control the mark and space signals on the telegraph line. The paper tape was from 0.46 to 0.48 inches in width, (but the standard width is from 0.472 to 0.475 inches) and a standard thickness of 0.004 to 0.0045 inches. [3] Olive oil coating lubricated the punch process. [4]
Methods of copying handwritten letters Manifold stylographic writer, using early "carbonic paper" Letter copying book process; Mechanical processes Tracing to make accurate hand-drawn copies; Pantograph, manual device for making drawn copies without tracing, can also enlarge or reduce; Printmaking, which includes engraving and etching
Using letter copying presses, copies could be made up to twenty-four hours after a letter was written, though copies made within a few hours were best. A copying clerk would begin by counting the number of master letters to be written during the next few hours and by preparing the copying book. Suppose the clerk wanted to copy 20 one-page letters.
The paper tape that controls casting contains 14 columns of holes that indicate the row of the matrix-case to be used, and 14 columns of holes that indicate the column of the matrix-case to be used. Originally, one row and one column of the matrix-case were indicated by the absence of a hole, and each of the others was indicated by a single hole.
The name of the machine comes from producing an entire line of metal type at once, hence a line-o'-type. It was a significant improvement over the previous industry standard of letter-by-letter manual typesetting using a composing stick and shallow subdivided trays, called "cases". The Linotype machine operator enters text on a 90-character ...
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The Monotype System took a different direction in hot metal typesetting, with the ability of the Composition Caster to cast loose type using a paper tape-operated automatic casting machine. The paper tape would be first generated on a keyboard and then used to cast the type; the tape could be stored for future casting for subsequent editions.
IBM Magnetic Tape/Selectric Composer (MT/SC) in use Panel of MT/ST. The IBM MT/ST (Magnetic Tape/Selectric Typewriter, and known in Europe as MT72 [1]) was a model of the IBM Selectric typewriter, built into its own desk, integrated with magnetic tape recording and playback facilities, located in an attached enclosure, with controls and a bank of relays. [2]