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Pressure Sensitive Marking Stylus

IP.com Disclosure Number: IPCOM000091877D
Original Publication Date: 1968-Jun-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Kambic, SF: AUTHOR

Abstract

The marking stylus is prevented or inhibited from making a mark on paper until the stylus is brought to bear upon the paper with a predetermined pressure. The stylus consists of outer shell 1, inner shell 2, and ball-point cartridge 3 containing writing hall 4. Inside shell 2 are located solenoid 5 and compression string 6. Shells 2 and 1 are connected together by strain sensor 7. The upper flange of sensor 7 is connected to shell 1 by nut and bolt 10. The lower flange of sensor 7 is connected to shell 2 by stud 11. Spring 6 forces solenoid armature 8 and cartridge 3 downward. As cartridge 3 is urged downward, it bears against the flanged ends of shell 2. A camming action results which forces the tip of cartridge 3 against ball 4 and makes ball 4 immobile. Thus, the stylus is prevented from making any marks on the paper.

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Pressure Sensitive Marking Stylus

The marking stylus is prevented or inhibited from making a mark on paper until the stylus is brought to bear upon the paper with a predetermined pressure. The stylus consists of outer shell 1, inner shell 2, and ball-point cartridge 3 containing writing hall 4. Inside shell 2 are located solenoid 5 and compression string 6. Shells 2 and 1 are connected together by strain sensor 7. The upper flange of sensor 7 is connected to shell 1 by nut and bolt 10. The lower flange of sensor 7 is connected to shell 2 by stud 11. Spring 6 forces solenoid armature 8 and cartridge 3 downward. As cartridge 3 is urged downward, it bears against the flanged ends of shell 2. A camming action results which forces the tip of cartridge 3 against ball 4 and makes ball 4 immobile. Thus, the stylus is prevented from making any marks on the paper.

The user holds the stylus by shell 1 and exerts downward pressure on the stylus against the paper. The downward pressure exerted by the user is sensed by sensor 7 which generates a signal proportional to the pressure and this signal is conducted to threshold switch 9. The latter provides an output signal upon the reception of a predetermined value of original from sensor 7. When sufficient pressure is exerted on the stylus by the user to produce the predetermined value signal from sensor 7, switch 9 operates to produce an output signal which is connected to and energizes the coil of solenoid 5. When the latter is...