Photoelectric disc reader with alternate reading locations

Details Photoelectric disc reader with alternate reading locations Photoelectric disc reader with alternate reading locations

1976-03-18

1977-09-06

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340347P, G01D 534

Patent

active

040470245

ABSTRACT:
A photoelectric pulse initiator includes a rotating pattern having a single track of indicia scanned by two optoelectronic sensors. The sensors having different mounting relationships for scanning different indicia patterns. Alternate impulses from the sensors produce opposite polarity pulses in a three wire remote meter reading telemetry system.

REFERENCES:
patent: B503618 (1976-03-01), Willlts
patent: 3770971 (1973-11-01), Somerset
patent: 3800204 (1974-03-01), Kenney
patent: 3814934 (1974-06-01), Mesh et al.
patent: 3963919 (1976-06-01), Sells

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