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Browse Prior Art Database

Optical Card Lever

IP.com Disclosure Number: IPCOM000098335D
Original Publication Date: 1960-Aug-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Cook, KA: AUTHOR

Abstract

The photoelectric assembly is used as a card detector to replace the customary electromechanical card levers used in card feeds.

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Optical Card Lever

The photoelectric assembly is used as a card detector to replace the customary electromechanical card levers used in card feeds.

Light from a bulb is directed through a lens and aperture to a mirror which reflects the light back through a second aperture to a photocell. The apertures are spaced such that, when a hole in a card permits light to pass through one aperture, the second aperture is blocked by the web of card stock between holes. Thus, the presence of a card blocks the light from reaching the cell even though the card may have holes present in the area of the sensing unit. This, therefore, indicates the presence of a card even though a hole is sensed in the card, since light is not reflected to the photocell.

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