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Browse Prior Art Database

Card Transport Mechanism

IP.com Disclosure Number: IPCOM000078086D
Original Publication Date: 1972-Nov-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Orlando, AW: AUTHOR [+2]

Abstract

This transport mechanism is an inexpensive way of selecting one item from a file cartridge containing many closely spaced items.

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 88% of the total text.

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Card Transport Mechanism

This transport mechanism is an inexpensive way of selecting one item from a file cartridge containing many closely spaced items.

The file cartridge rests in a carriage assembly 12, mounted on four wheels 14 that ride on round bars 16. The motor 18 drives the carriage 12 through a transmission system, comprising two stainless steel bands 20 and 22 that are wrapped around a drive shaft 24 and attached to the carriage 12 under tension so that they pull on the carriage in opposite directions as the motor 18 rotates.

The items in the file cartridge 10 are contained in a number of pockets formed by opaque separators 26, which constitute the address of the objects. As these separations move they intersect a light beam impinging on a phototransistor 28 through a slit 30. The slit 30 is equal to the thickness of the separators 26 and is so positioned that as each separator 26 passes it, there is a change in the intensity of the light that shines on the phototransistor 28. Utilizing these changes, the separators 26 are counted as they pass the selector unit.

When the desired separator or address has been reached, the motor 18 is turned off and a magnetic brake 32 applied. However, because of the high velocity of travel when covering long distances, there tends to be some overshoot. The electronic logic circuits compare the stopped position with the desired address and if it shows that the desired address has been passed, the brake 32 is released an...