Browse Prior Art Database

Reverse-Activated Engagement Scheme

IP.com Disclosure Number: IPCOM000119976D
Original Publication Date: 1991-Mar-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Huber, DL: AUTHOR [+2]

Abstract

Disclosed is a technique for selectively engaging a portion of a gear train that operates intermittently for a single cycle and then disengages. This invention eliminates the need for solenoids or clutches, which are expensive and can be unreliable. The design is completely mechanical, highly reliable, and low cost. (Image Omitted)

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 76% of the total text.

Reverse-Activated Engagement Scheme

      Disclosed is a technique for selectively engaging a
portion of a gear train that operates intermittently for a single
cycle and then disengages.  This invention eliminates the need for
solenoids or clutches, which are expensive and can be unreliable.
The design is completely mechanical, highly reliable, and low cost.

                            (Image Omitted)

      The mechanism consists of a sectored spur gear 1 that has
integral to it a latch feature 2 and a cam 3.  A spring 4 acting
on the cam 3 applies a torsional moment to the gear 1.  This
torsional moment holds the latch 2 against a tenon 5, which is
integral to a compound gear 6 located beside the sector gear.  This
is the normal latched condition for the single cycle portion of the
gear train.  The compound gear 6 consists of a helical gear, and a
spur gear that transmits drive to the sector gear 1 and any other
gearing further downstream 7.  If no further downstream drive is
required, some form of torsional load through friction or other means
must act upon the helical gear. Since the helical gear is terminal at
this point, it is subject to axial motion due to the applied load
acting through the helix angle.  By providing axial clearance, gear 6
is free to slide when torque is applied.  During normal operation
gear 6 is driven out due to the direction of rotation and the tenon 5
stays in the path of the latch 2 on the sector gea...