Procedure and apparatus for checking the straightness of elevato

Details Procedure and apparatus for checking the straightness of elevato Procedure and apparatus for checking the straightness of elevato

1991-11-27

1993-06-01

Jones, David

Metal deforming

With use of control means energized in response to activator...

Including plural sensors or sensor responsive to comparison...

72 10, 72389, 72390, B21D 501

Patent

active

052149471

ABSTRACT:
The present invention relates to a procedure for checking the straightness of elevator guide rails and straightening deflections of the rails, and an apparatus for implementing the procedure. The elevator guide rails are inspected by means of a measuring apparatus movable along the rail, which apparatus includes two guides adapted to lean against the rail in longitudinally spaced relation to each other, by measuring the distance separating the measuring apparatus and guide rail. This distance measurement is taken, using the measuring device, at a point between the guides. The measured deflections are straightened, and the straightened areas are then checked, again by means of the measuring apparatus, to verify the results.

REFERENCES:
patent: 1605310 (1926-11-01), Weaver
patent: 2060013 (1936-11-01), Baker
patent: 2216152 (1940-10-01), Becker
patent: 3456467 (1969-07-01), Hogarth
patent: 3713312 (1973-01-01), Galdabini
patent: 3745806 (1973-07-01), Ratfield
patent: 4079817 (1978-03-01), Tosato et al.
patent: 4306435 (1981-12-01), Galdabini
patent: 4627170 (1986-12-01), McKechnie
patent: 5056671 (1991-10-01), Thorsen

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