Web centerline locating system

Geometrical instruments – Area integrators – Electrical

Patent

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Details

33191, G01B 502

Patent

active

040807401

ABSTRACT:
A web centerline locating system which automatically determines the centerline of the vertical thickness of a web in a structural steel member, and the like, and in combination with a gauging system for accurately locating a vertically moveable drilling head, with respect to that centerline. The device further includes a bellis mechanism which is activated by the vertical movements of the probes as they contact the web thickness, so that a center section of the bellis will be referrable to the vertical position of the centerline of the web thickness. The center section of the bellis is directly connected to an indicator means which indicates and references the various vertical positions assumed by the center section to an external standard, for establishing the exact vertical position of the web centerline. The invention also includes the combination of a web centerline locating system with an associated horizontal drilling assembly, so that the referenced vertical position of the web may be employed to accurately position a horizontal drill assembly for flange drilling on structural members, regardless of size or alignment errors characteristic of structural members.

REFERENCES:
patent: 3874086 (1975-04-01), Ludlam

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