Frictional pivots for gravitational alignment

Details Frictional pivots for gravitational alignment Frictional pivots for gravitational alignment

2010-05-26

2011-11-29

Toatley, Gregory J (Department: 2877)

Optics: measuring and testing

Miscellaneous

C356S622000

Reexamination Certificate

active

08068221

ABSTRACT:
A frictional pivot100for use in a device measuring gravitational alignment is provided. The frictional pivot100comprises a gravity-responsive directional means200for indicating a datum direction of alignment with gravity; frictional pivoting means300, 400for allowing the gravity-responsive means coarsely to align with gravity; vibration means303, 403for vibrating one or more elements of the pivoting means; and portable power means303afor powering the vibration means303, 403.

REFERENCES:
patent: 2408589 (1946-10-01), Wells
patent: 5912733 (1999-06-01), Dunlop et al.
patent: 6693622 (2004-02-01), Shahoian et al.
patent: 7746467 (2010-06-01), Williams

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