Browse Prior Art Database

Stylus/Pen for Graphic Input Tablet

IP.com Disclosure Number: IPCOM000082324D
Original Publication Date: 1974-Nov-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Goodman, HA: AUTHOR

Abstract

A graphic input tablet responds to the position of a hand-held stylus, to produce coordinate information that can be used in a data processing system.

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Stylus/Pen for Graphic Input Tablet

A graphic input tablet responds to the position of a hand-held stylus, to produce coordinate information that can be used in a data processing system.

The drawing shows a stylus that makes capacitive coupling with a selected point on a tablet and also writes on a paper that is carried on the surface of the tablet. A lower outer shell 1 of aluminum and an upper outer shell 15 are connected with a trim ring 7 by two threaded conductive inserts 8 and 9. Lower shell 1 has a lower cone 2 of nonconductive material encompassing a compression spring 3, an insulating sleeve 4, an ink cartridge 5, and a hollow screw 6 that is made of insulating material and holds the cartridge 5 with a selected length of the tip extending beyond shell 1.

The upper shell 15 includes a hollow screw 10 that is threaded into a bushing 12 of insulating material, which carries a clip 13 that releasably grips the end of cartridge 5. Clip 13 is connected to the center conductor of a coaxial cable 14 that enters upper shell 15 through a flexible strain relief 16. The outer shell conductor of cable 14 is connected to a lug 11 that is electrically connected to lower outer shell 1 through the inserts 8 and 9.

With this construction, the components are held securely in place when the upper and lower shells 15 and 1 are disconnected for replacing the ink cartridge 5, or for adjusting the cartridge position for proper capacitive coupling to the tablet.

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