Remote meter reading apparatus
First Claim
1. A remote meter reading apparatus comprising meter means, reading means located remotely from the meter means and communication line means connecting the reading means to the meter means, the reading means being constructed to feed clock pulses to the meter means, the meter means being constructed to feed a predetermined number of synchronization signals followed by a predetermined number of meter data signals followed by a predetermined number of redundancy signals to the reading means in response to and in synchronism with the clock pulses, the synchronization signals and the redundancy signals being different from each other.
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Accused Products
Abstract
A remote meter reading unit (22) feeds clock pulses to a meter (23) over a transmission line (34). The meter (23), in synchronism with the clock pulses, feeds a predetermined number of synchronization signals, a predetermined number of meter data signals and a predetermined number of redundancy signals back to the reading unit (22).
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Citations
11 Claims
- 1. A remote meter reading apparatus comprising meter means, reading means located remotely from the meter means and communication line means connecting the reading means to the meter means, the reading means being constructed to feed clock pulses to the meter means, the meter means being constructed to feed a predetermined number of synchronization signals followed by a predetermined number of meter data signals followed by a predetermined number of redundancy signals to the reading means in response to and in synchronism with the clock pulses, the synchronization signals and the redundancy signals being different from each other.
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11. A remote meter reading apparatus comprising meter means, reading means located remotely from the meter means and communication line means connecting the reading means to the meter means, the reading means being constructed to feed clock pulses to the meter means, the meter means being constructed to feed a predetermined number of synchronization signals followed by a predetermined number of meter data signals followed by a predetermined number of redundancy signals to the reading means in synchronism with the clock pulses;
the meter means comprising bit counter means having a plurality of stages which sequentially produce high outputs in response to the clock pulses, digit counter means having a plurality of stages which sequentially produce high outputs in response to overflow signals from the bit counter means, a plurality of AND gate means having gate inputs connected to the outputs of the stages of the bit counter means respectively, OR gate means having inputs connected to outputs of all of the AND gate means and a meter for selectively connecting inputs of the AND gate means to outputs of the stages of the bit counter means in accordance with a meter reading.
Specification