Telemetering apparatus

Details Telemetering apparatus Telemetering apparatus

1997-06-25

2000-04-11

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By pulse coincidence

327 28, 327 91, G01R 1900, H03K 522

Patent

active

060492341

ABSTRACT:
The object of the present invention is to provide the telemetering apparatus, which telemeters electric power, gas, and waterworks, for telemetering via a telephone network with an exchange, wherein the telemetering apparatus responds to the normal polarity inversion, the slow polarity inversion, and calling bell signal applied to the communication line therebetween upon starting or releasing of use of the communication line. To attain the above object, the telemetering appears according to the present invention comprises detection means for detecting a rising edge or falling edge of those polarity inversions and signal characterized thereby with reference to the respective predetermined voltage and the respective predetermined period, thus distinguishing one of these polarity inversions and signal from the others.

REFERENCES:
patent: 3633048 (1972-01-01), Kleinberg
patent: 3649852 (1972-03-01), Bohley
patent: 4409497 (1983-10-01), Nagano
patent: 4791315 (1988-12-01), Gontowski, Jr.
patent: 4811389 (1989-03-01), Balch
patent: 4999527 (1991-03-01), Gontowski
patent: 5519666 (1996-05-01), McAdams
patent: 5748014 (1998-05-01), Bayer
patent: 5751692 (1998-05-01), Kiml
patent: 5844433 (1998-12-01), Nishimura

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