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Typewriter Shift Apparatus

IP.com Disclosure Number: IPCOM000093532D
Original Publication Date: 1967-Oct-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Walton, ND: AUTHOR

Abstract

The shift apparatus for a typewriter comprises shift keylever 10 and shift lock keylever 11. Each keylever is pivotally mounted on keylever mounting rod 12 and independently biased upwardly by spring 13. Depression of either keylever 10 or keylever 11 pushes trip rod 15 down to initiate a shift operation. When keylever 11 is partially depressed, ear 16 moves below shift lock latch 17. This member is permitted to rotate counterclockwise wider the action of spring 18. The shift mechanism is then latched or locked in its active position. To release the mechanism, keylever 10 is fully depressed and unlatching rod 19 is moved. Movement of rod 19 rotates latch 17 clockwise to cause restoration of the various parts.

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Typewriter Shift Apparatus

The shift apparatus for a typewriter comprises shift keylever 10 and shift lock keylever 11. Each keylever is pivotally mounted on keylever mounting rod 12 and independently biased upwardly by spring 13. Depression of either keylever 10 or keylever 11 pushes trip rod 15 down to initiate a shift operation. When keylever 11 is partially depressed, ear 16 moves below shift lock latch 17. This member is permitted to rotate counterclockwise wider the action of spring 18. The shift mechanism is then latched or locked in its active position. To release the mechanism, keylever 10 is fully depressed and unlatching rod 19 is moved. Movement of rod 19 rotates latch 17 clockwise to cause restoration of the various parts. When only keylever 10 is actuated, rod 19 rotates latch 17 clockwise away from keylever 11 to insure there is no possibility of inadvertently locking such keylever.

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