Browse Prior Art Database

Single Action Keyboard Device

IP.com Disclosure Number: IPCOM000090397D
Original Publication Date: 1969-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Jennings, JH: AUTHOR

Abstract

A typewriter keyboard 10 as described in U. S. Patent 3,086,635 is simplified by the provision of a leaf-spring single action trip lever 11. The latter is one of a plurality of such levers all forming part of unitary stamping 12. Lever 11 is formed to encompass an associated keylever 13 and is biased downwardly on it by engagement of tab 14 with keylever locating slot 15. Depression of keylever 13 transmits force to keyboard interposer 16 which moves through a path 17 as in the patent. In the event that keylever 13 remains depressed as interposer 16 returns on the restore portion 17' of its path 17, lever 11 deflects about its anchor point 15 to its broken line position.

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Single Action Keyboard Device

A typewriter keyboard 10 as described in U. S. Patent 3,086,635 is simplified by the provision of a leaf-spring single action trip lever 11. The latter is one of a plurality of such levers all forming part of unitary stamping 12. Lever 11 is formed to encompass an associated keylever 13 and is biased downwardly on it by engagement of tab 14 with keylever locating slot 15. Depression of keylever 13 transmits force to keyboard interposer 16 which moves through a path 17 as in the patent. In the event that keylever 13 remains depressed as interposer 16 returns on the restore portion 17' of its path 17, lever 11 deflects about its anchor point 15 to its broken line position. Keylever 13 must first be released to allow lever 11 to return to its full-line position before interposer 16 can be selected for a further cycle of operation.

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