Geometrical instruments – Gauge – Collocating
Patent
1991-06-13
1992-08-18
Will, Thomas B.
Geometrical instruments
Gauge
Collocating
269 50, 269317, 33644, 33573, G01D 2100, B32Q 108
Patent
active
051387727
ABSTRACT:
A reference point assembly is provided for use with an inspection table in which the reference point assembly is mounted to the table and adapted to engage an elongated slot on a part under inspection and, in doing so, accurately position the slot with respect to the reference point assembly and thus to the table. The reference point assembly includes a pin movable between a retracted and an extended position with respect to the table. The pin has two tapered surfaces on opposite sides which engage opposite sides of the slot and, in doing so, center the slot with respect to the pin in a first direction. Similarly, a ramp assembly is also movable between a retracted and an extended position with respect to the table. The ramp assembly includes a pair of ramp surfaces adapted to engage opposite ends of the slot end, in doing so, center the slot with respect to the ramp assembly in a second direction which is substantially perpendicular to the first direction. A pair of springs urge both the pin and the ramp assembly toward their extended position.
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