Method and components for remote reading of utility meters

Details Method and components for remote reading of utility meters Method and components for remote reading of utility meters

1981-09-29

1985-02-19

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

250231SE, H03K 1302

Patent

active

045008701

ABSTRACT:
A utility meter has a plurality of rotating shafts which have angular positions corresponding to the digits of a consumption reading. A cam is attached to that shaft which is associated with the least significant digit. The cam has a light reflecting track. Light from a light source is reflected off the track to a photodetector along an optical path which varies in length in accordance with angular cam position. Electronic circuitry is connected to the light source and photodetector and produces an output signal in digital form which has a frequency related to intensity of light incident upon the photodetector.

REFERENCES:
patent: 2953777 (1960-09-01), Gridley
patent: 2989642 (1961-06-01), Svec
patent: 3879136 (1975-04-01), Takeda
patent: 4037219 (1977-07-01), Lewis
patent: 4101882 (1978-07-01), Kramer
patent: 4118696 (1978-10-01), Warther
patent: 4162399 (1979-07-01), Hudson
Schwamb et al., Elements of Mechanism, John Wiley & Sons, 1904, pp.390-394.
Wait et al., Introduction to Operational Amplifier Theory . . . , 1975, McGraw-Hill Books, pp. 171-174; 281-286.

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