Optics: measuring and testing – Angle measuring or angular axial alignment
Patent
1977-10-14
1979-03-06
Corbin, John K.
Optics: measuring and testing
Angle measuring or angular axial alignment
33 1H, 33286, 356399, G01C 918
Patent
active
041427980
ABSTRACT:
A platform laser beam generator support and alignment apparatus and method for using the same in construction measurement and alignment operations. The apparatus includes a triangular planar base, an elongated track composed of two rigid tubular members, the track being attached to the base perpendicular to the plane thereof and a platform bearingly attached to the track and reciprocable thereon, the platform including a portion extending parallel to the base and perpendicular to the track. A conventional laser beam generator is mounted to the parallel portion of the platform and a winch motor is detachably mounted to the upper end of the track and connected to the platform to allow the platform and generator to be reciprocated along the track. A guide hole in the base directly below the mounting bracket and generator allows the apparatus to be positioned directly above a reference point for construction such as the point of origin at the bottom of a construction hole from which a trench is to be dug and a pipe is to be laid. The generator can be rotated in a plane parallel to the base in order that the laser beam generated thereby can be aligned with a surface reference target distant from the apparatus when the platform and generator are moved to a position near the upper end of the track and extending above the surface of the ground. This surface alignment can then be maintained while the platform and generator are reciprocated along the track to the desired construction depth, such that the final alignment of the beam and generator after movement along the track is parallel to the initial alignment with the distant reference target.
REFERENCES:
patent: 3533700 (1970-10-01), Alexander
patent: 3736058 (1973-05-01), Iadarola
patent: 3817624 (1974-06-01), Martin
patent: 4053238 (1977-10-01), George et al.
Corbin John K.
Rosenberger R. A.
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