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Key Entry Latching Mechanism

IP.com Disclosure Number: IPCOM000075315D
Original Publication Date: 1971-Sep-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Jenko, WJ: AUTHOR [+2]

Abstract

Described is a self-latching mechanism which may be utilized for starting a device or operation and remains latched until the operation is completed. In addition, reentry or retrys are inhibited until such time as the self-latching mechanism is released and the operation completed.

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Key Entry Latching Mechanism

Described is a self-latching mechanism which may be utilized for starting a device or operation and remains latched until the operation is completed. In addition, reentry or retrys are inhibited until such time as the self-latching mechanism is released and the operation completed.

The mechanism is illustrated in Fig. 1 in the restored position in which it is ready to accept an entry. In this position, switch 7 is open and the operating mechanism, not shown, which controls movement or carriage 9 is de-energized. When the enter button 1 is depressed, hinged latch 4 pivots and latches on catch
8. Spring 3 advances over knock-off 2. In the position illustrated in Fig. 2, switch 7 is closed and the carriage 9 is moved to the left by an operating mechanism. When the carriage is released, knock-off 2 pushes against spring 3 causing hinged latch 4 to release from catch 8 if the enter button is no longer depressed. If the enter button is depressed at this time, switch 7 remains closed and a retry is prohibited until the switch opens when the enter button is released. A lifting finger 10, Fig. 3, attached to the key stem 5, restores spring 3 to the position illustrated in Fig. 1.

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