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Browse Prior Art Database

Superimposed Selectively Illuminated Display

IP.com Disclosure Number: IPCOM000049747D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Bush, HG: AUTHOR [+2]

Abstract

Illuminated displays on typewriters have in ths past been fabricated from two rod-like members placed in proximity to each other with a display face of each of the members positioned toward the operator. The members have carried margin and print position graphics which may be referred to by the operator for determining carrier position, margin and tabulator setting positions.

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Superimposed Selectively Illuminated Display

Illuminated displays on typewriters have in ths past been fabricated from two rod-like members placed in proximity to each other with a display face of each of the members positioned toward the operator. The members have carried margin and print position graphics which may be referred to by the operator for determining carrier position, margin and tabulator setting positions.

The improved margin display illustrated herein comprises two scales silk- screened onto members 10 and 12, thereby representing margin scales for at least two separate escapements for the typewriter.

The light transmissible members 10 and 12 are positioned in juxtaposed positions with their flat faces substantially engaging one another to form a stack of illuminatable elements. The members 10 and 12 are respectively provided with light directing appendages 14 and 16 to convey and focus light from illuminatable bulbs 18 and 20 into the members 10 and 12.

The device is considerably easier to package behind a shield 22 and is more reliably manufactured due to the lack of precise positioning relative to each other.

The images constituting the escapement/margin scale are silk screened onto the light-transmitting members 10 and 12, and the light scatter within the members 10 and 12 is sufficient to illuminate the silk screened images and provide a visual appearance of a scale which has been internally illuminated.

Should a third escapement be implemente...