Photoelectric control system for moving storage units

Details Photoelectric control system for moving storage units Photoelectric control system for moving storage units

1986-10-31

1988-08-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250223R, 414274, G01N 2186, G01V 904

Patent

active

047615621

ABSTRACT:
A photoelectric system for controlling storage units arranged in a row and movable along the row to form passageways between adjacent storage units. Each storage unit includes a motor for moving the storage unit in respnose to manual and automatic electric control signals. Light-operated transmitters and receivers are located on each side of each storage unit so that the transmitters and receivers of the storage units interact with each other to control movements of the storage units in a preselected manner. Mirrors are also located on each side of each storage unit so as to provide a reflective signal path between a transmitter and receiver located on an adjacent storage unit. The reflective path is completed when the storage units are spaced a preselected distance from one another. Logic circuitry for the control system is also disclosed.

REFERENCES:
patent: 3824020 (1974-07-01), Pease
patent: 3892483 (1975-07-01), Saufferer
patent: 4331417 (1982-05-01), Shearer, Jr.

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