Browse Prior Art Database

Inertia Control Device

IP.com Disclosure Number: IPCOM000073753D
Original Publication Date: 1971-Jan-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Irving, WF: AUTHOR [+2]

Abstract

In magnetic copying apparatus undesirable inertia effects due to the relatively high rate of movement of the transfer elements, such as a permanent magnet drum, are created. The inertia control device shown helps to reduce, or eliminate, these undesirable inertial forces.

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Inertia Control Device

In magnetic copying apparatus undesirable inertia effects due to the relatively high rate of movement of the transfer elements, such as a permanent magnet drum, are created. The inertia control device shown helps to reduce, or eliminate, these undesirable inertial forces.

Permanent magnet drum assembly 20 includes a plurality of magnetic segments mounted on a steel cylinder 75. A flux reversal is established at the junction point of each segment to effect the transfer of signals from a master card to a copy card by rotating drum 20.

Gears 70 and 71 and clutch assembly 80 are mounted on drive shaft 77 concentrically positioned in drum assembly 20. Shaft 77 rotates in one direction to couple clutch assembly 80 to outer cylinder 81 and drive the assembly. When shaft 77 rotates ~n the opposite direction, and cylinder 81 is free-running since clutch assembly 80 is not coupled to the cylinder.

Clutch assembly 80 comprises a collar 83 press fitted internally to cylinder 75 and connected therewith by connecting pin 84 and roller clutch 86. Clutch 86 includes outer shell 90 and a plurality of rollers 91 mounted in a carrier.

Rollers 91 are positioned by integrally mounted retainer springs to advance into a locked condition on the ramps 92 when shaft 77 is driven counterclockwise as shown in figure B. When shaft 77 rotates clockwise as shown in Figure C, rollers 91 instantly disengage from the ramps to permit low friction over-running by drive collar...