Base board device for measuring instruments

Details Base board device for measuring instruments Base board device for measuring instruments

1979-05-29

1981-07-07

Punter, William H.

Optics: measuring and testing

Angle measuring or angular axial alignment

Alignment of axes nominally coaxial

356255, G01B 1127, G02B 2732

Patent

active

042771714

ABSTRACT:
A base board device for detachably mounting a measuring instrument such as a transit. The base board device has a centering telescope for locating the base board directly above a point on the ground. The centering telescope has a mark in the eyepiece which defines a viewing axis directed vertically downwardly. In order to determine whether or not the viewing axis as defined by the mark is directed accurately downwardly, the centering telescope is used. To facilitate that use, the base board is formed at the center thereof with an aperture so as to make it possible to observe the vertically downward point through the centering telescope.

REFERENCES:
patent: 197369 (1877-11-01), Hoffman
patent: 202916 (1878-04-01), Young
patent: 1827135 (1931-10-01), Blake
patent: 2166101 (1939-07-01), Moller
patent: 2696052 (1954-12-01), Czarnikow
Osterholzer, E. J., "Apparatus For Electrically Connecting A Probe With An Integrated Circuit", Western Electric Tech. Dig. #26, 4-1972, pp. 45-50.

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