Index track support structure

Details Index track support structure Index track support structure

1990-03-30

1991-10-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

G01D 534

Patent

active

050536184

ABSTRACT:
An optical code track supporting structure for providing position data about a moveable object. The encoder has an outside portion and an inside portion connected by a series of evenly spaced spokes which form a clear index track which allows substantially all of a light beam to be transmitted therethrough. The index track also has a single index element located therein which fully blocks the light beam for one brief pulse during one cycle of the moveable object.

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