Work holders – Holder inserted within work aperture – Holder mounted for movement
Patent
1983-04-01
1985-09-17
Watson, Robert C.
Work holders
Holder inserted within work aperture
Holder mounted for movement
269 63, 269 69, 269 71, 269 76, 269 43, B23Q 104
Patent
active
045416214
ABSTRACT:
A portable welding jig, for positioning and manipulating a workpiece, configured for pipe-flange welding at remote locations and capable of establishing automatically a two-holed flange configuration, is comprised of a rotatable shaft adjustably secured to a support, wherein the shaft rotates about a longitudinal work axis, and an adjustment member for orienting the shaft in a positioning plane containing the work axis; a flange mounting member depending from the distal end of the shaft, including a flange mounting plate member for receiving a flange and presenting same for rotation about the work axis in a working plane generally normal to the positioning plane; and indexing members for locating a flange borne upon the mounting plate in a two-holed configuration within the plane. The indexing members include a lateral leveling member rotatable concentrically with respect to the shaft and having a reference inscription thereon for establishing a reference location when the lateral leveling member is leveled horizontally to define a leveling plane generally normal to both the positioning and working planes, and an array of indexing inscriptions associated with the shaft and disposed at preselected positions corresponding to fixed angular orientations of the shaft, one of each of the indexing inscriptions in the array relating to a predetermined flange size, whereby registration of an appropriate indexing inscription with the reference inscription at the reference location correlates the angular position of the shaft to present the flange in a two-holed orientation within the working plane.
REFERENCES:
patent: 1414970 (1922-05-01), Nelson
patent: 2479623 (1949-08-01), Johnson
patent: 2483811 (1949-10-01), Cullen
patent: 2654147 (1953-10-01), Wilson et al.
patent: 2988354 (1961-06-01), Schultz
patent: 3048387 (1962-08-01), Waggoner
patent: 3298681 (1967-01-01), Youngblood
patent: 3499225 (1970-03-01), Darrah
patent: 4145006 (1979-03-01), Webb
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