Bridge type coordinate measuring machine

Details Bridge type coordinate measuring machine Bridge type coordinate measuring machine

1985-01-24

1986-06-17

Stearns, Richard R.

Geometrical instruments

Gauge

Coordinate movable probe or machine

33 1M, G01B 503, G01B 703

Patent

active

045947910

ABSTRACT:
A bridge type coordinate measuring machine characterized by a bridge (20) that has a closed loop configuration encircling the measuring machine base (10). The bridge (20) includes two uprights (21, 22), an upper member (23) connecting the uprights together and at least one lower member (24) connecting the uprights together below the upper surface (11) of the base (10). Bearings (41) for the bridge are offset inwardly from the vertical axes of the uprights of the bridge and a guideway (12, 13), along which the bearings travel, is located on each side of the base. The bearings (41) operate upwardly, downwardly and sidewardly against the surfaces of the guideways (12, 13) located on the sides of the base (10). This arrangement both stiffens and raises the resonant frequency of the bridge, thereby improving the measuring accuracy and repeatability of the coordinate measuring machines performance.

REFERENCES:
patent: 2620256 (1952-12-01), Kerns et al.
patent: 3241243 (1966-03-01), Speer
patent: 3639993 (1972-02-01), Sartorio
patent: 3749501 (1973-07-01), Wieg
patent: 3774311 (1973-11-01), Stemple
patent: 3840993 (1974-10-01), Shelton
patent: 4155173 (1979-05-01), Sprandel
patent: 4175327 (1979-11-01), Herzog
patent: 4315371 (1982-02-01), Kotani et al.
patent: 4442607 (1984-04-01), Sakata et al.

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