Three dimensional homologous surveying instrument

Details Three dimensional homologous surveying instrument Three dimensional homologous surveying instrument

1989-11-24

1992-08-18

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33273, 33397, 33 1LE, 33414, G01C 916

Patent

active

051387719

ABSTRACT:
A three-dimensional homologous surveying instrument includes a base with a spherical cover mounted thereon for receiving therein a shell holder, an intermediate spherical shell and an inner spherical shell with respective zero references set in a homologous relationship with each other. The inner spherical shell rotates within the intermediate spherical shell on a first axis serving as a dynamic X-axis. The intermediate spherical shell rotates in the shell holder on a second axis perpendicularly intersecting the first axis and thus serves as a dynamic Y-axis. The cover is positioned in the base to serve as the Z-axis. Longitudinal and latitudinal scaling on the cover matches longitudinal and latitudinal scaling on the intermediate and inner shells, resulting in a three-dimensional, completely homologous surveying instrument.

REFERENCES:
patent: 807382 (1905-12-01), Hogan
patent: 2384586 (1945-09-01), Allgeo

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