Browse Prior Art Database

Oscillation Eliminator

IP.com Disclosure Number: IPCOM000098110D
Original Publication Date: 1960-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Johnston, HT: AUTHOR

Abstract

The spring biased stacker plate of a card operated machine has a tendency to oscillate, when a large stack of cards is removed. If the machine is operating, this action spills successively fed cards out of the stacker pocket. This is eliminated by this device in which a plate 10 is provided with a permanent magnet 11 and is spring urged upward by a spring 12 located about the spindle 14 of the stacker. Fastened in the wall 15 of the stacker pocket is a magnetic reading head 16.

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Oscillation Eliminator

The spring biased stacker plate of a card operated machine has a tendency to oscillate, when a large stack of cards is removed. If the machine is operating, this action spills successively fed cards out of the stacker pocket. This is eliminated by this device in which a plate 10 is provided with a permanent magnet 11 and is spring urged upward by a spring 12 located about the spindle 14 of the stacker. Fastened in the wall 15 of the stacker pocket is a magnetic reading head 16.

The reading head is connected through an amplifier 17 to a coil 18 forming a solenoid with the spindle 14. After cards are removed from the pocket, the plate is raised by spring 10 and normally oscillates. However, as the magnet 11 passes the reading head 16, current is momentarily supplied to the coil 18 which is wound to arrest the upward movement of the spindle 14. Each time the plate passes the reading head the oscillations are dampened bringing the plate to rest.

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