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Typing Aid for Physically Handicapped

IP.com Disclosure Number: IPCOM000087493D
Original Publication Date: 1977-Feb-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Hanks, PC: AUTHOR

Abstract

This typing aid, which is used in combination with an electric typewriter, permits typing by a physically handicapped person who is capable of only slight movement of head, limb, or finger.

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Typing Aid for Physically Handicapped

This typing aid, which is used in combination with an electric typewriter, permits typing by a physically handicapped person who is capable of only slight movement of head, limb, or finger.

The typing aid includes a fiber-optic keyboard unit 1 electrically connected by cable 2 to a typewriter-actuating unit 3 which is positioned with its solenoid- actuated hammers immediately above the keys of a typewriter 4.

Keyboard 1 has fifty-two photocells 5 arranged in a standard typewriter configuration. Each photocell 5 is located at the far end of a short fiber-optic pipe which is set into the surface of the keyboard 1. Photocells 5 are recessed in this way to shield them from the effect of ambient light. While not illustrated in the figure, each photocell is identified by an adjacent character printed on the surface of keyboard 1. Keyboard 1 is provided with a fiber-optic pipe 6 about two feet in length through which light is fed from a light source to its tip 7.

The physically handicapped typist is usually capable of small low-strength movements and can therefore easily manipulate light-weight pipe 6 through small angles to direct light from tip 7 to selected ones of photocells 5. The light from tip 7 activates the selected photocells, causing them to generate output voltage pulses which are transmitted via cable 2 to typewriter-actuating unit 3.

Actuating unit 3 includes a power supply, a trigger circuit, an array of AND gates and hammer drivers, and an array of solenoid-actuated hammers for depressing corresponding keys of typewriter 4. The trigg...