Encased position measuring instrument

Details Encased position measuring instrument Encased position measuring instrument

1987-07-16

1988-10-11

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Housings

250237G, 74 182, G01B 1100

Patent

active

047773618

ABSTRACT:
An encased position measuring instrument for measuring the relative position of two objects comprises a housing, a measuring scale and a scanning unit. The measuring scale is scanned by the scanning unit which is connected to a fastening member by means of a connecting rod. The connecting rod moves through a frontal opening in the housing which is hermetically sealed by a sealing unit. To avoid undesirable constraining forces exerted on the connecting rod when the housing changes position, the sealing unit is fastened to the housing by means of rods or wires. These rods run parallel to the connecting rod and are rigid in the measuring direction but allow movement of the sealing unit at right angles to the measuring direction.

REFERENCES:
patent: 3051515 (1962-08-01), Graves
patent: 4387300 (1983-06-01), Dudash et al.
patent: 4405859 (1983-09-01), Kling et al.
patent: 4607956 (1986-08-01), Ishihara et al.
patent: 4718284 (1988-01-01), Pfeiffer
Gekapseltes Universal-Langenmess-System Walzspalt-Mess-System, Feb. 1982.

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