Adjustable base, notably for topometry apparatus

Details Adjustable base, notably for topometry apparatus Adjustable base, notably for topometry apparatus

1975-03-28

1976-01-13

Frazier, Roy D.

Supports

Stand

To hold a particular article

248184, 2481884, 33299, F16M 1112

Patent

active

039319474

ABSTRACT:
This adjustable base, notably for topometric and similar apparatus, comprises a case, a movable member in said case having a substantially vertical axis and bearing on the bottom of said case through three balls, a pair of screws perpendicular to each other for adjusting the verticality of the axis of said movable member, at least one return spring, a pair of passages formed partly in the bottom of said case and partly in the opposite lower face of the movable member, the first passage being defined by a flat surface and by a V-sectioned groove converging toward each other in the direction of a first one of the three balls, the second passage being defined by two other V-sectioned grooves converging toward each other in the direction of said first ball, the two other balls being disposed each in a respective one of the two passages, and each adjustment screw engaging the ball disposed in the relevant passage for pivoting the movable member about the first ball.

REFERENCES:
patent: 2647320 (1953-08-01), Keuffel et al.
patent: 3799484 (1974-03-01), Muller et al.

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