Browse Prior Art Database

Easily Ajustable Repeat Character Mechanism

IP.com Disclosure Number: IPCOM000048404D
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Ratliff, OL: AUTHOR

Abstract

Repeat characters are found on many keyboards. Examples of the repeat characters are hyphen, underscore, period and X. Additional characters from time to time are also implemented in a repeat capability depending upon the particular keyboard.

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Easily Ajustable Repeat Character Mechanism

Repeat characters are found on many keyboards. Examples of the repeat characters are hyphen, underscore, period and X. Additional characters from time to time are also implemented in a repeat capability depending upon the particular keyboard.

Typically, repeat keylevers are of a two-piece design consisting of a keylever and a repeat lever. As the repeat keybutton and keylever 10 is depressed, the keylever pawl 12 latches down the character interposer 22 for a single or non- repeat operation.

After one selection operation, the interposer 14 holds the keybutton pawl toward the rear. As the keybutton and keylever 10 are depressed further, the repeat lever 16 rotates about its pivot 18 moving its lug 20 downward which is aligned with the character interposer 22. The lug 20 contacts the character interposer 22 moving it into the repeat position. In this position, the character interposer latch spring 14 is held down too low to contact the latch plate 24. Keyboard cycle clutch latch 26 remains unlatched and rotates until the interposer 14 is restored when the keylever 10 is released. As the keyboard cycle clutch latch rotates, the filter shaft 28 drives the character interposer forward, giving input to the selection system.

If the repeat keylever lug 20 is too high or too low relative to its nominal position, failures may occur. These failures may occur in one of two manners, not allowing the character interposer to be latche...