Geometrical instruments – Straight-line light ray type – Rod or target
Patent
1983-11-28
1985-10-01
Haroian, Harry N.
Geometrical instruments
Straight-line light ray type
Rod or target
33299, G01C 1506, G01B 1130
Patent
active
045437297
ABSTRACT:
A clamp for a tooling ball having a base plate, a ball stand secured to the base plate, and a tooling ball bound to the ball stand. A clamp assembly rotatably sandwiches the tooling ball and supports a scale, or the like, for rotation about the tooling ball. A method for establishing a plane for lay-out purposes with a clamp assembly supporting a scale and rotatably sandwiching a tooling ball bound to the tool ball stand supported on a base plate. The method comprises positioning a pair of the clamp assemblies on a jig under construction such that the scale is in a position to measure vertical distances from the jig under construction. The method additionally comprises situating an independent scale across the two scales of the pair of clamp assemblies such that a horizontal edge of the independent scale defines and identifies the established plane for lay-out purposes.
REFERENCES:
patent: 665024 (1901-01-01), Lister
patent: 1816700 (1931-07-01), Rosen
patent: 3730470 (1973-05-01), Mitchell
patent: 4085512 (1978-04-01), Bod
Haroian Harry N.
Widdowson John H.
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