Meter reader
First Claim
1. A method of remotely reading at least one utility meter of a subscriber using telephone communication lines, comprising the steps of:
- dialing the telephone number of said subscriber;
detecting the occurrence of a predetermined number of ring signals at the subscriber location;
transmitting one of a plurality of coded tones to circuitry connected in parallel across the subscriber'"'"'s telephone communication line;
detecting if said one of a plurality of transmitted tones matches a predetermined tone after detecting the occurrence of a predetermined number of ring signals;
sequentially reading voltages corresponding to the consumption recorded by said at least one utility meter upon detecting that said one of a plurality of transmitted tones matches the predetermined tone;
converting each of said sequentially read voltages to one of a plurality of standard DTMF tones each representing a number from 0 to 9; and
transmitting said sequentially read voltages over said subscriber'"'"'s telephone communication line.
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0 Petitions
Accused Products
Abstract
A method of and apparatus for remotely reading at least one of a plurality of utility meters at a subscriber'"'"'s location using the subscriber'"'"'s non-dedicated telephone communication line is disclosed in which the device is activated only during a certain time on a predetermined day of the mouth and only after a predetermined number of ring signals are detected on the subscriber'"'"'s line. An identifying tone signal is generated at the central station and sent to the meter reader at the subscriber'"'"'s location where it is detected and compared to a pre-set tone signal. Upon acceptance, the meter reader then sequentially reads a plurality of voltages which are produced by applying a pre-determined voltage to a plurality of contacts for each utility meter dial. The voltage applied to the contacts passes through a plurality of zener diodes of different values. The different voltages thus generated correspond to the consumption registered by the utility meter. After being read, they are then converted to standard DTMF tone signals and transmitted to the central station for storage.
48 Citations
34 Claims
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1. A method of remotely reading at least one utility meter of a subscriber using telephone communication lines, comprising the steps of:
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dialing the telephone number of said subscriber; detecting the occurrence of a predetermined number of ring signals at the subscriber location; transmitting one of a plurality of coded tones to circuitry connected in parallel across the subscriber'"'"'s telephone communication line; detecting if said one of a plurality of transmitted tones matches a predetermined tone after detecting the occurrence of a predetermined number of ring signals; sequentially reading voltages corresponding to the consumption recorded by said at least one utility meter upon detecting that said one of a plurality of transmitted tones matches the predetermined tone; converting each of said sequentially read voltages to one of a plurality of standard DTMF tones each representing a number from 0 to 9; and transmitting said sequentially read voltages over said subscriber'"'"'s telephone communication line. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Apparatus for the remote reading of at least one dial of at least one utility meter of a subscriber using the subscriber'"'"'s telephone communication line, comprising:
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means connected to the telephone communication line of the subscriber for detecting the occurrence of a predetermined number of ring signals on the subscriber'"'"'s line and for producing a first enabling signal indicative thereof; means for receiving a plurality of tone signals and for comparing a received tone signal to a predetermined tone signal;
said means for receiving being connected in parallel across said subscriber'"'"'s telephone communication line;means for producing a second enabling signal upon receiving a predetermined tone; means connected to receive said first and second enabling signals for actuating means for sequentially reading voltages corresponding to consumption recorded by said at least one utility meter; and means for transmitting said sequentially read voltages over said subscriber'"'"'s telephone communication line for receipt at a remote location. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. Apparatus for remotely reading at least one dial of at least one utility meter at a subscriber'"'"'s location, using said subscriber'"'"'s telephone line, comprising:
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ring detector means connected to said subscriber'"'"'s telephone line for counting the number of ring signals on said subscriber'"'"'s telephone line; tone detector means coupled to be activated by said ring detector means after said ring detector means reaches a predetermined count for connection to said subscriber'"'"'s telephone line to detect a tone signal transmitted over said telephone line; means for sequentially reading a plurality of voltages corresponding to the consumption recorded by said at least one utility meter, said means for sequentially reading being activated to begin the sequential reading upon said tone detector means receiving a predetermined tone signal; and means for transmitting each of said sequentially read plurality of voltages on said subscriber'"'"'s telephone line to a central collection station. - View Dependent Claims (15, 16, 17)
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18. A method of remotely reading at least one utility meter of a subscriber using telephone communication lines, comprising the steps of:
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dialing the telephone number of said subscriber; detecting the occurrence of a predetermined number of ring signals at the subscriber location; transmitting one of a plurality of coded tones to circuitry connected in parallel across the subscribers'"'"' telephone communication line; detecting if said one of a plurality of transmitted tones matches a predetermined tone after detecting the occurrence of a predetermined number of ring signals; generating a signal corresponding to the consumption recorded by said at least one utility meter; and transmitting the generated consumption signal over said subscriber'"'"'s telephone communication line upon detecting that said one of a plurality of transmitted tones matches the predetermined tone. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. Apparatus for the remote reading of at least one utility meter of a subscriber using the subscriber'"'"'s telephone communication line, comprising:
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means connected to the telephone communication line of the subscriber for detecting the occurrence of a predetermined number of ring signals on the subscriber'"'"'s line and for producing a first enabling signal indicative thereof; means for receiving a plurality of tone signals and for comparing a received signal to a predetermined tone signal;
said means for receiving being connected in parallel across said subscriber'"'"'s telephone communication line;means for producing a second enabling signal upon determining that a predetermined tone signal was received; means for generating a signal corresponding to the consumption recorded by said at least one utility meter; and means connected to receive said first and second enabling signals for actuating means for transmitting said generated signal corresponding to consumption recorded by said at least one utility meter over said subscriber'"'"'s telephone communication line for receipt at a remote location. - View Dependent Claims (26, 27, 28, 29, 30)
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31. Apparatus for remotely reading at least one utility meter at a subscriber'"'"'s location, using said subscriber'"'"'s telephone line, comprising:
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ring detector means connected to said subscriber'"'"'s telephone line for counting the number of ring signals on said subscriber'"'"'s telephone line; tone detector means coupled to be activated by said ring detector means after said ring detector means reaches a predetermined count for connection to said subscriber'"'"'s telephone line to detect a tone signal transmitted over said telephone line; means for generating a signal corresponding to the consumption recorded by said at least one utility meter, said means for generating being activated to begin transmitting the consumption signal upon said tone detector means receiving a predetermined tone signal; and means for transmitting said consumption signal on said subscriber'"'"'s telephone line to a central collection station. - View Dependent Claims (32, 33)
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34. Apparatus for the remote reading of at least one utility meter of a subscriber using the subscriber'"'"'s telephone communication line, comprising:
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means connected to the telephone communication line of the subscriber for detecting the occurrence of a predetermined number of ring signals on the subscriber'"'"'s line and for producing a first enabling signal indicative thereof; means for receiving a plurality of tone signals and for comparing a received tone signal to a predetermined tone signal;
said means for receiving being connected in parallel across said subscriber'"'"'s telephone communication line;means for producing a second enabling signal upon receiving a predetermined tone; means connected to receive said first and second enabling signals for actuating means for sequentially reading voltages corresponding to consumption recorded by said at least one utility meter; and means for transmitting said sequentially read voltages for receipt at a location remote from said subscriber.
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Specification