Adjustable side draft indicator

Details Adjustable side draft indicator Adjustable side draft indicator

1987-11-13

1991-02-05

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33384, 33264, G01C 910

Patent

active

049893270

ABSTRACT:
A transparent shape retentive and flexibly resilient tubular member is supported from a farm tractor in an upstanding plane disposed transverse to the tractor and is vertically bowed. The interior of the tubular member includes gravity responsive indicator structure disposed therein and movable therealong to a longitudinal center position within said tubular member responsive to gravity forces when the vehicle is laterally horizontally disposed and movable, proportionally along the tubular member from a central position therein toward opposite ends of the tubular member responsive to lateral tilting of the tractor in opposite directions and structure is provided to adjustably vary the radius of curvature of the arcuate tubular member.

REFERENCES:
patent: 1955488 (1934-04-01), Crane et al.
patent: 2010191 (1935-08-01), Koch et al.
patent: 2353586 (1944-07-01), Reininger
patent: 2357817 (1944-09-01), Foster
patent: 2555954 (1951-06-01), Bruflat
patent: 2677193 (1954-05-01), Truppe
patent: 3522658 (1970-08-01), Howell
patent: 3548508 (1970-12-01), Jacobsen
patent: 4363174 (1982-12-01), Curtis

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