Remotely adjustable sighting device for tractors

Details Remotely adjustable sighting device for tractors Remotely adjustable sighting device for tractors

1980-11-06

1983-07-19

Martin, Jr., William D.

Geometrical instruments

Straight-line light ray type

Structurally installed

33185V, 33392, G01C 1500

Patent

active

043935966

ABSTRACT:
A sighting device for attachment to the hood of the tractor is remotely adjustable by a driver seated in a driver's seat of the tractor to enable him to visually align the tractor with a swath or furrow previously cut in a field by a towed farm implement so that a swath or furrow presently being cut by the farm implement is properly aligned with the previously cut swath or furrow. The sighting device includes a pair of opposed horizontal telescopic extension arms and a pair of pivot arms pivotally attached to respective outer ends of the extension arms. Each of the pivot arms is utilized as a sighting blade which is oriented so that, as seen by the eyes of the driver, the sighting blade is parallel to and aligned along the previously plowed furrow or the edge of the previously cut swath. The degree of extension of the horizontal extension arms and the degree of inclination of the pivot arms are independently controllable by means of a pair of momentary switches located near the driver's seat.

REFERENCES:
patent: 1373852 (1921-04-01), Allen
patent: 2483011 (1949-09-01), Hudson
patent: 2827704 (1958-03-01), Hunsicker
patent: 3028678 (1962-04-01), Bakehouse
patent: 3654653 (1972-04-01), Eggert et al.
patent: 3932028 (1976-01-01), Klingler
patent: 3943635 (1976-03-01), Ito
patent: 4280281 (1981-07-01), Gerber

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