Compass with fine adjustment

Details Compass with fine adjustment Compass with fine adjustment

1978-02-06

1979-08-07

Aegerter, Richard E.

Geometrical instruments

Scriber

Curved line

33191, 33154R, B43L 922

Patent

active

041633229

ABSTRACT:
A compass is provided which includes a fine adjustment mechanism comprising lateral spreader bars attached to the respective compass legs and a central drive wheel meshing with the spreader bars. The spreader bars and drive wheel are located in a compass head consisting of front and rear half shells which have lateral guides for the spreader bars and a rotary disc for operating the drive wheel.

REFERENCES:
patent: 1396417 (1921-11-01), Gepack
patent: 2074102 (1937-03-01), Christy
patent: 2568559 (1951-09-01), Nolde
patent: 3137947 (1964-06-01), Flower

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