Abstract: An electronic typewriter having a carriage which is automatically returned upon entering of space data through one operation of a space key on a keyboard, which space data is to be executed within an automatic-carriage-return zone which consists of a desired number of columns just before or up to the right-hand margin of the line of printing, comprising: a check device for checking whether printing data entered immediately after space data which causes an automatic carriage return is another space data or not; a timer which is started upon entering of the carriage-return space data; and a control device for comparing data of a time which is given by the timer when the above-indicated another space data is entered, with data of a predetermined reference time, and thereby executing the above-indicated another space data if the data of the time which is given by the timer is found to be beyond the data of the reference time, the control device neglecting the above another space data if the data of the time of th

Abstract: In an impact printing apparatus including a carriage which carries a rotary type element, the length of time required for a motor drive system for the carriage stop hunting and stabilize at a desired printing position depends on variables including the distance the carriage was moved, character pitch and the like. The apparatus senses these variables and delays hammering of the type element for printing for a length of time calculated to reduce the displacement of the carriage from the desired printing position caused by hunting to an acceptable value while maximizing the effective printing speed.

Abstract: A typewriter is described which has an electronic keyboard utilizing a timed delay to determine whether a depressed key is indicative of the desire to print or display repetitive letters represented by that key. The typewriter is provided with a technique for automatically adjusting the length of the delay such that a slow typist with sluggish finger movement will automatically cause the extension of the delay time and thereby prevent unwanted repetitive characters while a fast, very rhythmic typist will not cause the automatic extension of the delay time and thereby will benefit from a shorter delay time and will have a higher output or productivity as a result thereof.The automatic extension is accomplished by timing the period of time that keylevers are held depressed and when that time approaches but does not exceed the preset automatic delay time, the delay time is then extended a predetermined amount.

Abstract: A rotatable print disc is mounted on a carrier which traverses along the print line. The disk is moved from each character position to the next by the shortest distance and it is stopped at the time of printing. The carrier is moved from one print position to the next at a speed which is selected depending on the time required for the disk to rotate to the next character. Printing takes place with the carrier moving at one of a number of speeds. The force utilized to drive the hammer to print the characters is varied dependent on which character is being printed. Hammer firing for each character is timed dependent on printing speed and upon the force utilized to drive the hammer.