Geometrical instruments – Straight-line light ray type – Structurally installed
Patent
1979-07-11
1982-02-02
Martin, Jr., William D.
Geometrical instruments
Straight-line light ray type
Structurally installed
116 28R, 280477, G01C 1500
Patent
active
043132642
ABSTRACT:
Method and apparatus for the alignment and coupling of vehicles. Indicators which are viewable from an operating position in one of the vehicles are separately affixed to each of the vehicles. The vehicles are then maneuvered to bring the indicators into alignment and permit the coupling of one vehicle to the other.
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patent: 3918746 (1975-11-01), Lehtisaari
patent: 3998285 (1976-12-01), Cooper
patent: 4012056 (1977-03-01), Christensen
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Kersey George E.
Martin, Jr. William D.
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