Browse Prior Art Database

Changeable Keyboard

IP.com Disclosure Number: IPCOM000089850D
Original Publication Date: 1968-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Arfman, KD: AUTHOR

Abstract

An optical arrangement is provided which accommodates the quick changing of the designation of the keys of the keyboard of a SELECTRIC typewriter, or the like. Projecting card 1 contains an array of perforated alpha numeric characters corresponding to each character of the associated typewriter ball. Adjacent each character displayed on card 1 is positioned the end of a molded plastic image conduit, such as conduit 2. The opposite ends of the respective conduits 2 are connected to the appropriate key caps so that the proper character is transmitted to the proper key cap.

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Changeable Keyboard

An optical arrangement is provided which accommodates the quick changing of the designation of the keys of the keyboard of a SELECTRIC typewriter, or the like. Projecting card 1 contains an array of perforated alpha numeric characters corresponding to each character of the associated typewriter ball. Adjacent each character displayed on card 1 is positioned the end of a molded plastic image conduit, such as conduit 2. The opposite ends of the respective conduits 2 are connected to the appropriate key caps so that the proper character is transmitted to the proper key cap.

Projection light 3 projects the images of the characters of card 1 onto the respective ends of the adjacent conduits 2. The latter, in turn, transmit the respective images to their opposite ends where they are projected through respective translucent key caps as shown at 4. A conventional key with a molded LUCITE* core can be used. The core can be made concave at 5 to facilitate image enlarging.

A cap 4 is snugly secured to a sleeve as shown at 6. Sleeve 6, moving downwardly around conduit 2 in response to depression of key caps 4, actuates lever 7 and thus initiates the typing of the character. Compression spring 8 acts to return the key cap-sleeve assembly after depression. A spring having a force corresponding to the desired touch is selected. *Trademark of E. I. du Pont de Nemours and Co.

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