Apparatus for telemetry apparatus for reading utility meters

Details Apparatus for telemetry apparatus for reading utility meters Apparatus for telemetry apparatus for reading utility meters

1984-07-23

1987-03-31

Myracle, Jerry W.

Communications: electrical

Continuously variable indicating

With meter reading

340347M, 340688, G08C 1916

Patent

active

046546626

ABSTRACT:
A telemetry apparatus is disclosed for reading utility meters. The apparatus includes a meter-base unit 10 mounted in a conventional utility meter and comprising a plurality of sensors (18a-18e) positioned to sense numerical data displayed on a conventional meter number wheel set 13. Sensors 18a through 18e preferably comprise pads 52 positioned on the face of wheels 13 which are sensed by feather switches 55. The signals are processed by a microprocessor and are converted from parallel to serial form and transmitted in a bit stream to the mobile unit 30. A security circuit 50 is provided for sensing whether the meter-based unit 10 has been tampered with. The security circuit 50 includes operational amplifier sections 74a and 74b which operate as latches to hold the voltage at a predetermined position if the flow of current through a current loop 51 is interrupted. The mobile unit 50 includes a key pad 33 through which the meter-based unit 10 can be interrogated by a transmitter 36.

REFERENCES:
patent: 3656112 (1972-04-01), Paull
patent: 4337466 (1982-06-01), Spahn

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