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Electromechanical Printer

IP.com Disclosure Number: IPCOM000096205D
Original Publication Date: 1963-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Burgel, E: AUTHOR

Abstract

A flexural vibrator is clamped at one end and carries a print type on its free end. It is held in a tensioned condition by an electromagnet. When the magnet is de-energized, the vibrator is released and strikes the print type against the platen.

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Electromechanical Printer

A flexural vibrator is clamped at one end and carries a print type on its free end. It is held in a tensioned condition by an electromagnet. When the magnet is de-energized, the vibrator is released and strikes the print type against the platen.

The flexural vibrator is formed by a leaf spring 1. This is clamped at one end and carries print type 2 on its free end. In its inoperative position, spring 1 is held in a tensioned condition by electromagnet 3. In order to produce a type impact, the current J flowing through pickup coil 4 is interrupted at time A and spring 1 is released. It swings back striking type 2 against the platen 5. This carries paper 6 and ink ribbon 7.

The swinging amplitude a of spring 1 is reduced by encountering the platen (point B). Thus, the printing time is shorter than the natural oscillation period of spring 1. The control current J is turned on again at such a time (point C) when the magnetic flux omega reaches its full value when the returning spring 1 has the shortest distance (point D) from magnet 3. Spring 1 is then again clamped in its original position.

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