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Browse Prior Art Database

Key Hold Down

IP.com Disclosure Number: IPCOM000091960D
Original Publication Date: 1968-Jul-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Zell, MN: AUTHOR

Abstract

Detent slide 1 operating against the biasing force of spring 2 is reset at the end of every normal reset cycle. Detent slide 3, operating against the force of tension spring 4, is reset by cam 5. When key 6 is depressed, both detent slides 1 and 3 engage keystem stud 7 to retain key 6 in the depressed position. At the end of a normal cycle, bail 8 pivots in the direction of arrow A to drive slide 1 against the force of spring 2. However, since slide 3 is not driven from its detent position, key 6 remains depressed. During the initial portion of a cycle, when it is desired to restore key 6, cam 5 is rotated causing slide 3 to be moved to a position releasing stud 7 and to be retained there by detent lever 9 which pivots into the cooperating slide recess 10. Key 6 is still held in the depressed position by slide 1.

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Key Hold Down

Detent slide 1 operating against the biasing force of spring 2 is reset at the end of every normal reset cycle. Detent slide 3, operating against the force of tension spring 4, is reset by cam 5. When key 6 is depressed, both detent slides 1 and 3 engage keystem stud 7 to retain key 6 in the depressed position. At the end of a normal cycle, bail 8 pivots in the direction of arrow A to drive slide 1 against the force of spring 2. However, since slide 3 is not driven from its detent position, key 6 remains depressed. During the initial portion of a cycle, when it is desired to restore key 6, cam 5 is rotated causing slide 3 to be moved to a position releasing stud 7 and to be retained there by detent lever 9 which pivots into the cooperating slide recess 10. Key 6 is still held in the depressed position by slide 1. At the end of the cycle, bail 8 pivots in the direction of arrow A driving slide 1 and allowing key 6 to be restored. As slide 1 is driven to release key 6, cam surface 12 of recess 13 pivots lever 9 against the biasing force of spring 14 to release slide 3 for return to the normal home position shown.

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