Dual stereographic net

Details Dual stereographic net Dual stereographic net

1977-10-18

1979-05-08

Tomsky, Stephen J.

Geometrical instruments

Miscellaneous

Light direction

235 61NV, B43L 500

Patent

active

041528352

ABSTRACT:
Instruments presently available for stereographic calculations use a single net over which transparent paper is moved. The device of this invention has two nets, one printed on each side of a rotatable disc in a frame and the calculations are made by rotating the nets under transparent paper fixed to the frame.

REFERENCES:
patent: 2114652 (1938-04-01), Dalton
patent: 2755565 (1956-07-01), Alkema
patent: 2916207 (1959-12-01), Vohland
patent: 3231188 (1966-01-01), Warner
patent: 3373493 (1968-03-01), McDonald
patent: 3983630 (1976-10-01), Hamm et al.

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