Workpiece end locator

Details Workpiece end locator Workpiece end locator

1978-07-20

1981-01-13

Little, Willis

Geometrical instruments

Area integrators

Electrical

33181R, 33174L, 33 1PT, 51165R, B24B 4900

Patent

active

042441102

ABSTRACT:
A workpiece end locator which provides a linear analog voltage indicative of the workpiece location relative to a reference plane. The output of the end locator can be utilized for positioning the workpiece at a desired location or for providing position information to the machine control system which will automatically compensate for the workpiece position. The disclosed end locator utilizes a rotatable shaft having a probe arm extending from one end thereof. A probe tip on the probe arm contacts the workpiece whose position is being detected. A rotary transducer is connected to the other end of the rotatable shaft for providing a linear analog signal representative of the angular shaft position. A pair of stops are provided between which the rotatable shaft can rotate. A pair of air actuators are provided, one of which biases the rotatable shaft toward one stop and the other biases the rotatable shaft toward the other stop. A spring loaded latch, which can be manually disengaged, is provided for engaging and holding the rotatable shaft at a zero reference point between the pair of stops.

REFERENCES:
patent: 3663189 (1972-05-01), Koide
patent: 3688444 (1972-05-01), Uhtenwoldt et al.
patent: 3855734 (1974-12-01), Fournier
patent: 3944798 (1976-03-01), Eaton

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