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US 4,679,329 AGranted
Combined primary and secondary sine bars
OwnerWesley R. Goldsmith, Joel E. Di Marcoinventors
Life of this patent
Estimating the term…
Abstract
A primary and secondary sine-bar combination wherein one sine-bar has opposite end plugs shared with the other sine-bar, for compound determination of sine-bar angularity in degrees, minutes and seconds, using gage-blocks and/or micrometer adjustment within plus or minus one degree for height resolution in minutes and seconds.
Claims26
In combination;
- a primary sine-bar comprised of a base plug for support upon a true surface and an altitude plug for support offset from said true surface, the plugs being held on spaced parallel axes by a bar member extending therebetween,
- a secondary sine-bar comprised of a bar member coextensively overlying the primary sine-bar with one end having direct supported engagement upon the base plug of the primary sine-bar and its other end overlying the altitude plug of the primary sine-bar,
- and adjustment means disposed between the altitude plug and the overlying end of the secondary sine-bar to adjust a height established by support of the altitude plug offset from said true surface.
In combination;
- a primary sine-bar comprised of a base plug for suport upon a true surface and an altitude plug for support offset from said true surface, the plugs being held on spaced parallel axes by a bar member extending therebetween,
- a secondary sine-bar comprised of a bar member coextensively overlying the primary sine-bar with one end having direct supported engagement upon the base plug of the primary sine-bar and its other end having a face parallel to a plane of tangency with and extending from the base plug of the primary sine-bar and overlying the altitude plug of the primary sine-bar,
- and adjustment means disposed between said altitude plug and the overlying face of the secondary sine-bar to adjust a height established by support of the altitude plug offset from said true surface.
In combination;
- a primary sine-bar comprised of a base plug for support upon a true surface and an altitude plug for support offset from said true surface, the plugs being held on spaced parallel axes by a bar extending therebetween,
- a secondary sine-bar comprised of a bar member coextensively overlying the primary sine-bar with one end having direct supported engagement upon the base plug of the primary sine-bar and its other end overlying the altitude plug of the primary sine-bar,
- and micrometer adjustment means disposed between said altitude plug and the overlying end of the secondary sine-bar and calibrated in parts of a degree of sine-bar angularity to adjust a height of degrees of angle of sine-bar angularity established by support of the altitude plug offset from said true surface.
Dependencies are inferred from the claim text.