Browse Prior Art Database

Signal Communication Apparatus

IP.com Disclosure Number: IPCOM000098472D
Original Publication Date: 1960-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Ahmad, KA: AUTHOR

Abstract

Magnetic induction is utilized for introducing information into a character recognition system or a display device. The device utilizes a stylus or pen 1 and a pad 2 containing coils 3, 4 and 5. Coils 3 and 4 are perpendicular to one another and coil 5 is at a 45 degree angle with respect to coils 3 and 4. Stylus 1 is used as a magnetic field source and has a DC power source 6, a coil 7 adjacent to its tip, and a switch 8 to energize coil 7 when stylus 1 is pressed against pad 2.

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Signal Communication Apparatus

Magnetic induction is utilized for introducing information into a character recognition system or a display device. The device utilizes a stylus or pen 1 and a pad 2 containing coils 3, 4 and 5. Coils 3 and 4 are perpendicular to one another and coil 5 is at a 45 degree angle with respect to coils 3 and 4. Stylus 1 is used as a magnetic field source and has a DC power source 6, a coil 7 adjacent to its tip, and a switch 8 to energize coil 7 when stylus 1 is pressed against pad 2.

As stylus 1 is pressed against pad 2 to energize coil 7, a magnetic field is created. When moving stylus 1 to write on pad 2, the magnetic field formed by coil 7 crosses coils 3, 4 and 5 and induces electrical voltages in them. The resultant currents generated are analyzed for information content or are utilized to create a display on a captured spot type cathode ray tube device such as a Memoscope. Similar devices are described in United States Patents Nos. 2,754,360 and 2,872,669.

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