Geometrical instruments – Area integrators – Electrical
Patent
1977-01-17
1980-06-03
Haroian, Harry N.
Geometrical instruments
Area integrators
Electrical
G01B 500
Patent
active
042054494
ABSTRACT:
An improvement in micro-calipers including a main beam, a mount slidably mounted on the main beam, a dial gage carried by the mount, a rack bar mounted on the main beam which has a toothed marginal portion, a pinion mounted on the dial gage which engages with the rack bar, a disc mounted on the gage which has a plurality of electrically conducting and concentrically disposed projections, an electrically conducting pointer coupled to the pinion and rotatable over the projections, a first lead in sliding electrical contact with the pointer, and a second lead in electrical contact with the projections. The leads are attached to first and second contacts of a calculator result-key or the like, so that a predetermined longitudinal displacement of the mount with respect to the main beam from a first position to a second position results in a predetermined number of interruptions in conductivity between the leads.
REFERENCES:
patent: 2995738 (1961-08-01), Masek
patent: 3213543 (1965-10-01), Masuda
patent: 3955073 (1976-05-01), Carew et al.
patent: 3965340 (1976-06-01), Renner
patent: 4022014 (1977-05-01), Lowdenslager
patent: 4053755 (1977-10-01), Sherrill
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