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Telemetering System Disclosure Number: IPCOM000097231D
Original Publication Date: 1962-Jul-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 57K

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Local meters can be read and periodic bills calculated by a central data processing system.

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Telemetering System

Local meters can be read and periodic bills calculated by a central data processing system.

Each local meter is connected to a transponder which recognizes address signals directed to it by the central system. It returns signals indicating the current meter reading. A large number of transponders can be assigned the same address. The data processing system identifies each one of the simultaneously responding meters. For example 150 telephone lines, each having 3060 meters per line, can be read by one data processing system. Every transponder connected to the same telephone line has a different one of 3060 addresses. Corresponding transponders on different lines have identical addresses. The meters, up to 659,000, can be repeatedly read and the current readings accumulated for billing purposes. This is effected by simultaneously placing on all 150 lines each one of 3060 addresses in sequence.

An address in a six-bit code is initially sent to address gates by the data processor. The address is stored in tone latches. Their settings are decoded four different times by tone selection circuits under control of an output timing ring. A signal appears on one of 18 tone lines to the 18 tone gates each time that the tone latches are decoded. As a result, a series of four frequencies from the oscillators is sent to a mixer in accordance with each specified address. For detecting errors a nineteenth (idle) frequency is sent to the mixer when none of the...