Drum screw with measuring drum for a sextant

Details Drum screw with measuring drum for a sextant Drum screw with measuring drum for a sextant

1991-02-08

1991-09-03

Haroian, Harry N.

Geometrical instruments

Straight-line light ray type

Vertical angle

G01C 108

Patent

active

050440861

ABSTRACT:
A spring element, surrounding the drum-screw axis, is fitted between an annular shoulder on the bearing bush of a drum screw and the measuring drum. The spring element, preferably an annular spring assembly, produces a defined contact-bearing force of the drum screw against the bearing bush while at the same time making low-friction adjustment without axial backlash possible for the drum screw.

REFERENCES:
patent: 2439102 (1948-04-01), Rothweiler
patent: 3484942 (1969-12-01), Toubhans
patent: 3698090 (1972-10-01), Parone
patent: 4656878 (1987-04-01), Inai et al.

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