Precision measuring apparatus

Details Precision measuring apparatus Precision measuring apparatus

1981-04-23

1983-08-30

Martin, Jr., William D.

Geometrical instruments

Area integrators

Electrical

33 1M, 308 3A, 308 6R, G01B 1104

Patent

active

044008805

ABSTRACT:
A precision measuring apparatus (10, 10') includes a measuring scale (12, 12'), a scanning unit (15, 15') for scanning the scale (12, 12'), and a housing (11, 11') for supporting the scale (12, 12') and the scanning unit (15, 15'). The scanning unit (15, 15') rides on guide surfaces (16, 16', 17, 18) at least some of which are defined by flexible bands (19, 20, 28') that are loosely carried by grooves (21, 22, 29') defined by the walls of the housing (11, 11'). The bands (19, 20, 28') provide a relatively straight and smooth guiding arrangement for the scanning unit (15, 15') and they are preferably made of wear-resistant material such as steel. When the housing (11') is comprised of a plurality of housing sections (31'), the bands (19, 20, 28') are made in one piece and bridge the gap between the housing sections (31' ) without interruption.

REFERENCES:
patent: 2522695 (1950-09-01), Walter
patent: 2798005 (1957-07-01), Love
patent: 2844416 (1958-07-01), Zaveruha
patent: 3053580 (1962-09-01), Bullard
patent: 4068906 (1978-01-01), Dur et al.
patent: 4160328 (1979-07-01), Ernst
patent: 4189840 (1980-02-01), Holstein

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