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Incrementer with Locking Device

IP.com Disclosure Number: IPCOM000091891D
Original Publication Date: 1968-Jun-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Luoma, RW: AUTHOR

Abstract

In order to prevent any external force applied to output shaft 10 from disturbing the synchronization between drive link 11 and driven wheel 12, which is mounted to rotate with 10, lock 13 is provided. The latter is pivotedly mounted and is provided with locking tooth 14 for entering between the teeth of 12 to thus hold the same against movement when 12 is not being driven via drive pin 15 carried by drive arm 11. Spring 16 is attached to 13 so as to urge cam follower surface 17 of 13 into engagement with enlarged extension 19 of pin 15.

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Incrementer with Locking Device

In order to prevent any external force applied to output shaft 10 from disturbing the synchronization between drive link 11 and driven wheel 12, which is mounted to rotate with 10, lock 13 is provided. The latter is pivotedly mounted and is provided with locking tooth 14 for entering between the teeth of 12 to thus hold the same against movement when 12 is not being driven via drive pin 15 carried by drive arm 11. Spring 16 is attached to 13 so as to urge cam follower surface 17 of 13 into engagement with enlarged extension 19 of pin 15.

Drive arm 11 is mounted on eccentric 20 which imparts motion to 11. Arm 11 has central slot 21 for receiving fixed pin or pivot bearing 22. Pin 15 engages 12 during a portion of the cycle to drive 12 in one direction. During this time, 19 operates upon follower surface 17 to hold 14 withdrawn from 12. During the remainder of the cycle, 15 disengages from 12 and makes an excursion to be in position to engage another tooth of 12.

During this remaining portion of the cycle, 19 moves along surface 17 to bring 14 into engagement with a tooth of 12 and thereby hold the same against movement. Detent wheel 25 cooperates with 12 and functions to prevent over- travel as 12 is incremented by 15. Detent lock 13 can include a double cam surface thus eliminating the need for spring 16. Also, the angular velocity of locking tooth 14 is greater than the angular velocity of 12 by virtue of the configuration of surf...