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Opto-Electronic Ring Counter

IP.com Disclosure Number: IPCOM000098669D
Original Publication Date: 1959-Aug-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Standeven, JD: AUTHOR

Abstract

This counter, which operates with a single optical count pulse, has a built-in delay which permits the use of identical photoconductors throughout.

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Opto-Electronic Ring Counter

This counter, which operates with a single optical count pulse, has a built-in delay which permits the use of identical photoconductors throughout.

Photoconductors (squares) and neon or electroluminescent lamps (circles) are fitted into an opto-electronic count latch and transfer unit for each counting step. Photoconductor L accepts optical count signals and energizes all of the transfer units. The numbered latch lamps 1-2-3-4 hold the count and condition the associated lettered transfer unit lamps A-B-C-D to operate on count pulses to advance the count. Photoconductors are designated with the digit or letter of the illuminating lamp followed by the digit or letter of the count latch or transfer unit in which they are placed.

The counter may be set to 4 by an external light striking the S4 photoconductor in the No. 4 count latch, providing a conductive path from V through lamp 4 and its shunt resistance to ground. Lamp 4 lights and latches through PC 4; it also conditions PC 4a in the A transfer unit. The first count signal of light striking PC L provides a conductive path from V through PC 4a and through lamp A and its shunt resistance to ground. Lamp A lights for the duration of the count pulse, illuminating PC A1 to provide a conductive path from V through lamp 1-and its shunt resistance to ground. Lamp 1 lights and latches through PC 1.

Lamp A also illuminates PC Ab, which shunts out lamp B to prevent double counts during a long c...