Position determining device

Details Position determining device Position determining device

1976-01-26

1977-02-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231R, 356169, H01J 314

Patent

active

040073831

ABSTRACT:
A device for determining the position of at least two objects movable relative to each other preferably in a pre-set counter train which includes operatively associated optical elements supported on the objects together with a transmitter for emitting a directional beam such as an electromagnetic wave transmitter for producing an electromagnetic beam and a receiver onto which the beam is directed, the beam being directed in a unidirectional path onto the receiver when the optical elements are in a predetermined aligned position and being deflected from such path to an extent corresponding to the relative position of the objects and the optical elements supported thereon to provide an output from the receiver responsive to relative position of the objects.

REFERENCES:
patent: 3784833 (1974-01-01), Kimura
patent: 3842261 (1974-10-01), MacGovern et al.

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