Browse Prior Art Database

Character Sensing Device

IP.com Disclosure Number: IPCOM000098736D
Original Publication Date: 1959-Oct-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Supernowicz, EJ: AUTHOR [+2]

Abstract

In the system a character is identified and simply converted into a machine useable coded signal representing the sensed information.

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Character Sensing Device

In the system a character is identified and simply converted into a machine useable coded signal representing the sensed information.

Characters are printed on a card 10 with fluorescent ink which, when excited by an ultraviolet light (not shown), luminesces in various colors depending upon the pigment in them. Each of the different characters which are printed on the card 10 emits its own characteristic color, i. e., wave length, under U. V. excitation. The rotatably mounted disk 11 has ten radially oriented windows 12. Each window 12 is provided with a different color filter.

The greatest transmission of light through any particular window 12 occurs when the radiation coming from the illuminated character is substantially the same wave length as the passing, overlying filter. For example, a blue filter transmits more light from a blue character than from any other. Thus, a particular character on card 10 is identified by sensing the greatest energy transmission through disk 11. For this purpose there is provided a photo responsive device 13 which supplies an amplified output signal to a voltage discriminating circuit 14, such as a clipping circuit set at a given minimum level.

When the light transmission sensed by device 13 exceeds this established minimum, circuit 14 generates an output signal which occurs only when the character on the card and the filter assigned to that particular character coincide.

Further associated radially with...