Scalable measuring apparatus and displacement display device, sy

Details Scalable measuring apparatus and displacement display device, sy Scalable measuring apparatus and displacement display device, sy

1995-10-11

1996-09-03

Cuchlinski, Jr., William A.

Geometrical instruments

Straight-line light ray type

Process

33294, 33DIG21, G01C 1506

Patent

active

055511597

ABSTRACT:
Scalable measuring apparatus for use by an operator with a laser beam from a laser-level transmitter comprising a vertically disposed grade pole having lower and upper extremities. A laser-level receiver is provided for detecting the laser level beam. A controller is mounted on the grade pole and carryies the laser-level receiver. At least a portion of the controller is being capable of ascending and descending the grade pole. An indicator is electrically coupled to the laser-level receiver for giving a response perceptible to the operator when the laser beam is detected by the laser-level receiver. The controller has a brake for retaining the controller at a predetermined elevation with respect to said grade pole. The controller is capable of ascending and descending the grade pole which is free of markings.

REFERENCES:
patent: 4217696 (1980-08-01), Schindler
patent: 4653910 (1987-03-01), Poling
patent: 4851835 (1989-07-01), Krumholz et al.
patent: 4879552 (1989-11-01), Arai et al.

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