Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Motor Drive Assembly

IP.com Disclosure Number: IPCOM000079595D
Original Publication Date: 1973-Aug-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Robbins, LH: AUTHOR

Abstract

A single spring is provided for controlling overtravel and return forces with negligible friction in a magnet-armature actuated motor drive assembly.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Motor Drive Assembly

A single spring is provided for controlling overtravel and return forces with negligible friction in a magnet-armature actuated motor drive assembly.

As illustrated, magnet 1 has been energized and armature 2 has been rotated clockwise about point 10. In this position, extension spring 3 has transmitted a force to motor housing 7, causing it to rotate counterclockwise about point 11 to the extent that the small motor pulley 4 has contacted internal drive pulley 5. In this position, the force between pulleys 4 and 5 is determined solely by the force of spring 3, since there is a negligible amount of friction at pivot point 11. Also in this position there is a small clearance at point 12 between housing 7 and adjustable stop 6. Upon de-energization of magnet 1, spring 3 will rotate armature 2 counterclockwise about point 10 until the gap at point 12 is closed. In this position, the combination of forces due to spring 3 and stop 6 at point 12 on motor housing 7 causes a net torque in the clockwise direction. This will result in housing 7 rotating until the large motor pulley 8 contacts the reverse drive pulley 9. Again, the force between pulleys 8 and 9 is determined by the force of spring 3. The force between pulleys 8 and 9 may be made equal to, more than, or less than the force between pulleys 4 and 5 by varying dimensions X, Y, and Z.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]