Optics: measuring and testing – Angle measuring or angular axial alignment
Patent
1975-12-18
1976-11-02
Corbin, John K.
Optics: measuring and testing
Angle measuring or angular axial alignment
214 164A, 356140, 356153, 356172, 356247, G01B 1126, G01B 1127, G01C 900
Patent
active
RE0290254
ABSTRACT:
A light reference system for generating [a collimated beam of light and converting] and projecting [the same as] a relatively intense fan-shaped or diverging plane of light from an operator manipulatable device on a machine or a vehicle to an object or opening which may be positionally referenced to the device in a selected predetermined relation by operator control of the machine or vehicle and manipulatable device, thus enabling the operator to observably locate a sharply defined resulting line of light so as to establish such selected relation. The light reference system is capable of a number of different embodiments or forms, a few of which are disclosed herein. An exemplary embodiment of the machine or vehicle with which such a system is combined herein is of a fork lift truck vehicle on which the light reference system in various forms is mounted on the elevatable load handling device or fork carrier for generating [a collimated beam of light and for converting the same into] a flat plane of diverging light, referred to [usually] sometimes herein as a "fan-shape" of light, having abrupt demarcation in intensity and projected as a relatively intense operator observable line of light to any selected object, such as to a pallet in an elevated bin of a storage rack, in a predetermined attitude with respect to the load handling device such as the fork of a fork truck. Also disclosed is an embodiment which projects an image or visual reference in the form of a line of light, generated by a scanning laser beam, and projected on surfaces in the path of the projected light such as a pallet as recited above.
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patent: 3656828 (1972-04-01), Scholdstrom
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patent: 3742581 (1973-07-01), Roodvoeis
Clark Equipment Company
Corbin John K.
Punter Wm. H.
Wiessler John C.
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