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Dual Motion Typewriter

IP.com Disclosure Number: IPCOM000091420D
Original Publication Date: 1968-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Olami, D: AUTHOR

Abstract

An ordinary electric typewriter for accommodating the typing of Oriental script, written from right to left, as well as Latin script, written from left to right, is provided with a conversion keybutton. The latter adapts the normal back: space mechanism to effect reverse print escapement and spacing operations, modifies the normal space mechanism to effect reverse backspacing, uses the normal carriage-carrier return mechanism for reverse tabulation, and in turn uses the normal tabulator mechanism for reverse carriage-carrier return.

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Dual Motion Typewriter

An ordinary electric typewriter for accommodating the typing of Oriental script, written from right to left, as well as Latin script, written from left to right, is provided with a conversion keybutton. The latter adapts the normal back: space mechanism to effect reverse print escapement and spacing operations, modifies the normal space mechanism to effect reverse backspacing, uses the normal carriage-carrier return mechanism for reverse tabulation, and in turn uses the normal tabulator mechanism for reverse carriage-carrier return.

The alterations necessary for making a single element typewriter convertible encompass providing a cable between the backspace interposer and the velocity control cam followers. This is so as to allow initiation of a backspace operation by unlatching the interposer when the cam follower exerts a pull on the cable, the cam follower being controlled by the conversion keybutton.

The conversion keybutton is also linked to the escapement trigger for bringing the latter into or out of engagement with the torque bar of the print escapement mechanism. This permits print escapement in the normal position of the conversion keybutton and prevents print escapement in its reverse position.

An additional backspace keybutton is provided in the keyboard which, in the reverse position of the conversion keybutton, allows the space interposer to initiate a reverse backspace operation.

Upon carriage-carrier return, a line spacing o...