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Mechanical Picker Lift Mechanism

IP.com Disclosure Number: IPCOM000083997D
Original Publication Date: 1975-Sep-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 3 page(s) / 46K

Publishing Venue

IBM

Related People

Dials, EN: AUTHOR [+2]

Abstract

This mechanism transforms an unknown duration of rotary input motion into a small known angular output displacement, allows a "delay time" prior to the commencement of the angular output displacement, maintains the final output position for any excess amount of input rotation, and is energized and de-energized solely by the initiation and termination, respectively, of the input rotation.

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Mechanical Picker Lift Mechanism

This mechanism transforms an unknown duration of rotary input motion into a small known angular output displacement, allows a "delay time" prior to the commencement of the angular output displacement, maintains the final output position for any excess amount of input rotation, and is energized and de- energized solely by the initiation and termination, respectively, of the input rotation.

The separator shaft 1 of a roller paper separator provides the input rotary motion. Located on this shaft is a section of threads. In assembly these threads coincide with the location of the follower assembly 2. Also mounted on this shaft are the picker arm 3, clutch housing 4, clutch drive hub 5, "clock-slip spring" 10, clock.spring drive collar 11, and locking wheel 13, plus several other parts, not shown. The clutch band 6 mounts on the inside of the clutch housing 4.

When assembled: the lift ramp 2 is positioned over the picker follower pin 3, the clutch actuation arm 4 is located behind the follower pawl 2, the follower guide 2 is confined in a track, not shown, and the clutch drive hub 5 engages the tabs on the clutch band 6.

As the separator shaft 1 begins rotation in the direction indicated by arrow 7, the clutch drive hub 5 drives the clutch band tabs which, in turn, rotate the clutch housing 4. As the housing rotates, the clutch actuation arm 4a contacts the back of the follower pawl 2, causing it to be rotated down into the threads on the separator shaft 1. The follower assembly 2 is restricted from rotating by the follower guide 2c and track, therefore, it begins traversing linearly down the shaft 1 in the direction indicated by arrow 8.

By selection of thread lead and pitch, in conjunction with the separator shaft speed and the distance required to travel before the picker follower pin 3a contacts the lift ramp 2a, it is possible to design various delay times into the mechanism.

As the follower assembly 2 continues to travel along the separa...