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Direction Sensing of Pen Movement

IP.com Disclosure Number: IPCOM000093831D
Original Publication Date: 1966-Mar-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Nassimbene, EG: AUTHOR

Abstract

In character-sensing, ball-point pen 10, an electromagnet 11 magnetizes the ball 12 in a given direction. Sense heads 13 and 14 sense the direction of a significant rotation of ball 12. The sensing of rotation by head 13 is applied to circuits 15 and 16. The latter indicate whether the rotation is clockwise or counterclockwise. The output of head 13 is also supplied to circuit 17. This indicates whether either a clockwise or counterclockwise rotation occurs. This output is supplied to driver 18. Similar circuitry is provided for sense head 14. The output of driver 18 energizes magnetizing head 11, remagnetizing ball 12. Thus, each time a rotation of ball 12 is sensed, its magnetization is reset so that continued rotation of the ball is again sensed.

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Direction Sensing of Pen Movement

In character-sensing, ball-point pen 10, an electromagnet 11 magnetizes the ball 12 in a given direction. Sense heads 13 and 14 sense the direction of a significant rotation of ball 12. The sensing of rotation by head 13 is applied to circuits 15 and 16. The latter indicate whether the rotation is clockwise or counterclockwise. The output of head 13 is also supplied to circuit 17. This indicates whether either a clockwise or counterclockwise rotation occurs. This output is supplied to driver 18. Similar circuitry is provided for sense head 14. The output of driver 18 energizes magnetizing head 11, remagnetizing ball 12. Thus, each time a rotation of ball 12 is sensed, its magnetization is reset so that continued rotation of the ball is again sensed. Pen 10 thus senses not only the direction of writing but also indicates the distance written. Each time the ball's direction is sensed, the ball has traveled a specific distance, approximately 1/4 turn. Therefore, a count of the number of sensings indicates distance.

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