Browse Prior Art Database

Printer

IP.com Disclosure Number: IPCOM000073852D
Original Publication Date: 1971-Feb-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Barna, TB: AUTHOR [+3]

Abstract

The printer includes a rotatable type wheel 19 having various alphanumeric characters 23 embossed on its periphery. A print hammer 22 is moved into printing relationship with the various characters 23 on wheel 19, depending on which ones of six electromagnets 14 are energized.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 63% of the total text.

Page 1 of 2

Printer

The printer includes a rotatable type wheel 19 having various alphanumeric characters 23 embossed on its periphery. A print hammer 22 is moved into printing relationship with the various characters 23 on wheel 19, depending on which ones of six electromagnets 14 are energized.

The printer comprises six internally notched code rings 10 each of which has an upstanding arm 11. Code rings 10 are uniquely notched with all being different. Arms 11 are normally held in inoperative position by latches 12, each bring retracted from holding position by an armature 13 of an electromagnet 14. A spring 15 urges each of arms 11 from inoperative position to operative position, and a constantly rotating cam 16 moves arms 11 back to inoperative position to be held by latches 12. A ring 17, which has an internal notch for each alphanumeric character and is thus notched for its complete internal periphery, is coaxially disposed with respect to rings 10 also carries a drive tang 18 for pivoting print hammer 22. Rotation of ring 17 is limited by stop 30. Type wheel 19 is driven by any suitable friction drive and has an arm 20 fixed with respect to it carrying a pawl 21 adapted to engage in the various notches in rings 10 and 17.

In operation, if one or more electromagnets 14 are energized, the corresponding arms 11 are released by patches 12 and the springs 15 shift these arms to the left into operative position. This results in the alignment of a notch in each of rings 10 wi...