Laser beam control system for earthworking or similar machines

Details Laser beam control system for earthworking or similar machines Laser beam control system for earthworking or similar machines

1975-03-12

1976-04-27

Hubler, Malcolm F.

Road structure, process, or apparatus

Apparatus

Automatic control

172 45, E01c 1900, E02f 376

Patent

active

039531457

ABSTRACT:
Apparatus for controlling the elevation of the working tool of an earthworking machine, or the pavement distributor head of a mobile road-paving machine, in predetermined relationship to a fixed horizontal plane, as set by a laser beam which is periodically swept across the working area, such apparatus comprising a tape-dispensing device carried by the machine and arranged to intermittently advance the tape past a tape reader; the tape carrying two sets of indicia, one set indicating whenever a change in the height of the tool is required at a particular point in the travel of the machine, and the second set of indicia indicating the distance between such points, there being a ground-engaging wheel measuring the travel of the machine and connected to the tape-dispensing device to advance the tape to the next set of indicia whenever the machine arrives at the next one of said predetermined points.

REFERENCES:
patent: 3604512 (1971-09-01), Carter et al.
patent: 3791452 (1974-02-01), Long et al.

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