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Browse Prior Art Database

Two Character Address Identification System

IP.com Disclosure Number: IPCOM000089981D
Original Publication Date: 1968-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Smith, OH: AUTHOR

Abstract

This circuitry is for transmitting a two-part address. In a telephone type network, a pair of signals, one from a group of four and one from a group of three, can be used to represent the decimal digits 0...9. Such signals can be generated by combinations of bipolar signals on three input lines. Input line 1 has two relay coils 2 and 3 in series. Coil 2 is bypassed by diode 4 so as to be actuated only by a positive voltage is applied to line 1. Coil 3 is also bypassed by diode 5 and is activated by a negative voltage applied to line 1. The right end of line 1 is grounded. Input line 6 has relay coils 7 and 8 bypassed by diodes 9 and 10 for positive and negative voltage actuation respectively.

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Two Character Address Identification System

This circuitry is for transmitting a two-part address. In a telephone type network, a pair of signals, one from a group of four and one from a group of three, can be used to represent the decimal digits 0...9. Such signals can be generated by combinations of bipolar signals on three input lines. Input line 1 has two relay coils 2 and 3 in series. Coil 2 is bypassed by diode 4 so as to be actuated only by a positive voltage is applied to line 1. Coil 3 is also bypassed by diode 5 and is activated by a negative voltage applied to line 1. The right end of line 1 is grounded. Input line 6 has relay coils 7 and 8 bypassed by diodes 9 and 10 for positive and negative voltage actuation respectively. Input line 11 has diode 13 and relay coil 12 in series to respond to negative input voltages and diode 14 to pass positive input voltages to output 15 for control purposes.

Input signals on lines 1, 6 and 11 are decoded in a series of circuits and contacts. These are controlled by relay coils 2, 3, 7, 8, and 12 to connect a voltage input lead 16. Such connection is to one of four output leads 17, 18, 19, and 20 and to one of three output leads 21, 22, and 23 as indicated in the decoding table. The polarity of the input leads is indicated. A zero indicates no connection. A heavy line crossing a conductor represents a pair of normally closed contacts opened when the aligned relay coil is activated. An X indicates a pair of normally open contacts which are closed when the aligned rel...